/*
|
* Copyright (C) 2010 The Android Open Source Project
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
package android.nfc;
|
|
import android.annotation.NonNull;
|
import android.annotation.RequiresPermission;
|
import android.annotation.SdkConstant;
|
import android.annotation.SdkConstant.SdkConstantType;
|
import android.annotation.SystemApi;
|
import android.annotation.UnsupportedAppUsage;
|
import android.app.Activity;
|
import android.app.ActivityThread;
|
import android.app.OnActivityPausedListener;
|
import android.app.PendingIntent;
|
import android.content.Context;
|
import android.content.IntentFilter;
|
import android.content.pm.IPackageManager;
|
import android.content.pm.PackageManager;
|
import android.net.Uri;
|
import android.nfc.tech.MifareClassic;
|
import android.nfc.tech.Ndef;
|
import android.nfc.tech.NfcA;
|
import android.nfc.tech.NfcF;
|
import android.os.Bundle;
|
import android.os.Handler;
|
import android.os.IBinder;
|
import android.os.RemoteException;
|
import android.os.ServiceManager;
|
import android.util.Log;
|
|
import java.io.IOException;
|
import java.util.ArrayList;
|
import java.util.HashMap;
|
import java.util.List;
|
|
/**
|
* Represents the local NFC adapter.
|
* <p>
|
* Use the helper {@link #getDefaultAdapter(Context)} to get the default NFC
|
* adapter for this Android device.
|
*
|
* <div class="special reference">
|
* <h3>Developer Guides</h3>
|
* <p>For more information about using NFC, read the
|
* <a href="{@docRoot}guide/topics/nfc/index.html">Near Field Communication</a> developer guide.</p>
|
* <p>To perform basic file sharing between devices, read
|
* <a href="{@docRoot}training/beam-files/index.html">Sharing Files with NFC</a>.
|
* </div>
|
*/
|
public final class NfcAdapter {
|
static final String TAG = "NFC";
|
|
/**
|
* Intent to start an activity when a tag with NDEF payload is discovered.
|
*
|
* <p>The system inspects the first {@link NdefRecord} in the first {@link NdefMessage} and
|
* looks for a URI, SmartPoster, or MIME record. If a URI or SmartPoster record is found the
|
* intent will contain the URI in its data field. If a MIME record is found the intent will
|
* contain the MIME type in its type field. This allows activities to register
|
* {@link IntentFilter}s targeting specific content on tags. Activities should register the
|
* most specific intent filters possible to avoid the activity chooser dialog, which can
|
* disrupt the interaction with the tag as the user interacts with the screen.
|
*
|
* <p>If the tag has an NDEF payload this intent is started before
|
* {@link #ACTION_TECH_DISCOVERED}. If any activities respond to this intent neither
|
* {@link #ACTION_TECH_DISCOVERED} or {@link #ACTION_TAG_DISCOVERED} will be started.
|
*
|
* <p>The MIME type or data URI of this intent are normalized before dispatch -
|
* so that MIME, URI scheme and URI host are always lower-case.
|
*/
|
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
|
public static final String ACTION_NDEF_DISCOVERED = "android.nfc.action.NDEF_DISCOVERED";
|
|
/**
|
* Intent to start an activity when a tag is discovered and activities are registered for the
|
* specific technologies on the tag.
|
*
|
* <p>To receive this intent an activity must include an intent filter
|
* for this action and specify the desired tech types in a
|
* manifest <code>meta-data</code> entry. Here is an example manfiest entry:
|
* <pre>
|
* <activity android:name=".nfc.TechFilter" android:label="NFC/TechFilter">
|
* <!-- Add a technology filter -->
|
* <intent-filter>
|
* <action android:name="android.nfc.action.TECH_DISCOVERED" />
|
* </intent-filter>
|
*
|
* <meta-data android:name="android.nfc.action.TECH_DISCOVERED"
|
* android:resource="@xml/filter_nfc"
|
* />
|
* </activity></pre>
|
*
|
* <p>The meta-data XML file should contain one or more <code>tech-list</code> entries
|
* each consisting or one or more <code>tech</code> entries. The <code>tech</code> entries refer
|
* to the qualified class name implementing the technology, for example "android.nfc.tech.NfcA".
|
*
|
* <p>A tag matches if any of the
|
* <code>tech-list</code> sets is a subset of {@link Tag#getTechList() Tag.getTechList()}. Each
|
* of the <code>tech-list</code>s is considered independently and the
|
* activity is considered a match is any single <code>tech-list</code> matches the tag that was
|
* discovered. This provides AND and OR semantics for filtering desired techs. Here is an
|
* example that will match any tag using {@link NfcF} or any tag using {@link NfcA},
|
* {@link MifareClassic}, and {@link Ndef}:
|
*
|
* <pre>
|
* <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
|
* <!-- capture anything using NfcF -->
|
* <tech-list>
|
* <tech>android.nfc.tech.NfcF</tech>
|
* </tech-list>
|
*
|
* <!-- OR -->
|
*
|
* <!-- capture all MIFARE Classics with NDEF payloads -->
|
* <tech-list>
|
* <tech>android.nfc.tech.NfcA</tech>
|
* <tech>android.nfc.tech.MifareClassic</tech>
|
* <tech>android.nfc.tech.Ndef</tech>
|
* </tech-list>
|
* </resources></pre>
|
*
|
* <p>This intent is started after {@link #ACTION_NDEF_DISCOVERED} and before
|
* {@link #ACTION_TAG_DISCOVERED}. If any activities respond to {@link #ACTION_NDEF_DISCOVERED}
|
* this intent will not be started. If any activities respond to this intent
|
* {@link #ACTION_TAG_DISCOVERED} will not be started.
|
*/
|
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
|
public static final String ACTION_TECH_DISCOVERED = "android.nfc.action.TECH_DISCOVERED";
|
|
/**
|
* Intent to start an activity when a tag is discovered.
|
*
|
* <p>This intent will not be started when a tag is discovered if any activities respond to
|
* {@link #ACTION_NDEF_DISCOVERED} or {@link #ACTION_TECH_DISCOVERED} for the current tag.
|
*/
|
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
|
public static final String ACTION_TAG_DISCOVERED = "android.nfc.action.TAG_DISCOVERED";
|
|
/**
|
* Broadcast Action: Intent to notify an application that an transaction event has occurred
|
* on the Secure Element.
|
*
|
* <p>This intent will only be sent if the application has requested permission for
|
* {@link android.Manifest.permission#NFC_TRANSACTION_EVENT} and if the application has the
|
* necessary access to Secure Element which witnessed the particular event.
|
*/
|
@RequiresPermission(android.Manifest.permission.NFC_TRANSACTION_EVENT)
|
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
|
public static final String ACTION_TRANSACTION_DETECTED =
|
"android.nfc.action.TRANSACTION_DETECTED";
|
|
/**
|
* Broadcast to only the activity that handles ACTION_TAG_DISCOVERED
|
* @hide
|
*/
|
public static final String ACTION_TAG_LEFT_FIELD = "android.nfc.action.TAG_LOST";
|
|
/**
|
* Mandatory extra containing the {@link Tag} that was discovered for the
|
* {@link #ACTION_NDEF_DISCOVERED}, {@link #ACTION_TECH_DISCOVERED}, and
|
* {@link #ACTION_TAG_DISCOVERED} intents.
|
*/
|
public static final String EXTRA_TAG = "android.nfc.extra.TAG";
|
|
/**
|
* Extra containing an array of {@link NdefMessage} present on the discovered tag.<p>
|
* This extra is mandatory for {@link #ACTION_NDEF_DISCOVERED} intents,
|
* and optional for {@link #ACTION_TECH_DISCOVERED}, and
|
* {@link #ACTION_TAG_DISCOVERED} intents.<p>
|
* When this extra is present there will always be at least one
|
* {@link NdefMessage} element. Most NDEF tags have only one NDEF message,
|
* but we use an array for future compatibility.
|
*/
|
public static final String EXTRA_NDEF_MESSAGES = "android.nfc.extra.NDEF_MESSAGES";
|
|
/**
|
* Optional extra containing a byte array containing the ID of the discovered tag for
|
* the {@link #ACTION_NDEF_DISCOVERED}, {@link #ACTION_TECH_DISCOVERED}, and
|
* {@link #ACTION_TAG_DISCOVERED} intents.
|
*/
|
public static final String EXTRA_ID = "android.nfc.extra.ID";
|
|
/**
|
* Broadcast Action: The state of the local NFC adapter has been
|
* changed.
|
* <p>For example, NFC has been turned on or off.
|
* <p>Always contains the extra field {@link #EXTRA_ADAPTER_STATE}
|
*/
|
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
|
public static final String ACTION_ADAPTER_STATE_CHANGED =
|
"android.nfc.action.ADAPTER_STATE_CHANGED";
|
|
/**
|
* Used as an int extra field in {@link #ACTION_ADAPTER_STATE_CHANGED}
|
* intents to request the current power state. Possible values are:
|
* {@link #STATE_OFF},
|
* {@link #STATE_TURNING_ON},
|
* {@link #STATE_ON},
|
* {@link #STATE_TURNING_OFF},
|
*/
|
public static final String EXTRA_ADAPTER_STATE = "android.nfc.extra.ADAPTER_STATE";
|
|
/**
|
* Mandatory byte[] extra field in {@link #ACTION_TRANSACTION_DETECTED}
|
*/
|
public static final String EXTRA_AID = "android.nfc.extra.AID";
|
|
/**
|
* Optional byte[] extra field in {@link #ACTION_TRANSACTION_DETECTED}
|
*/
|
public static final String EXTRA_DATA = "android.nfc.extra.DATA";
|
|
/**
|
* Mandatory String extra field in {@link #ACTION_TRANSACTION_DETECTED}
|
* Indicates the Secure Element on which the transaction occurred.
|
* eSE1...eSEn for Embedded Secure Elements, SIM1...SIMn for UICC, etc.
|
*/
|
public static final String EXTRA_SECURE_ELEMENT_NAME = "android.nfc.extra.SECURE_ELEMENT_NAME";
|
|
public static final int STATE_OFF = 1;
|
public static final int STATE_TURNING_ON = 2;
|
public static final int STATE_ON = 3;
|
public static final int STATE_TURNING_OFF = 4;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag enables polling for Nfc-A technology.
|
*/
|
public static final int FLAG_READER_NFC_A = 0x1;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag enables polling for Nfc-B technology.
|
*/
|
public static final int FLAG_READER_NFC_B = 0x2;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag enables polling for Nfc-F technology.
|
*/
|
public static final int FLAG_READER_NFC_F = 0x4;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag enables polling for Nfc-V (ISO15693) technology.
|
*/
|
public static final int FLAG_READER_NFC_V = 0x8;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag enables polling for NfcBarcode technology.
|
*/
|
public static final int FLAG_READER_NFC_BARCODE = 0x10;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag allows the caller to prevent the
|
* platform from performing an NDEF check on the tags it
|
* finds.
|
*/
|
public static final int FLAG_READER_SKIP_NDEF_CHECK = 0x80;
|
|
/**
|
* Flag for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this flag allows the caller to prevent the
|
* platform from playing sounds when it discovers a tag.
|
*/
|
public static final int FLAG_READER_NO_PLATFORM_SOUNDS = 0x100;
|
|
/**
|
* Int Extra for use with {@link #enableReaderMode(Activity, ReaderCallback, int, Bundle)}.
|
* <p>
|
* Setting this integer extra allows the calling application to specify
|
* the delay that the platform will use for performing presence checks
|
* on any discovered tag.
|
*/
|
public static final String EXTRA_READER_PRESENCE_CHECK_DELAY = "presence";
|
|
/** @hide */
|
@SystemApi
|
public static final int FLAG_NDEF_PUSH_NO_CONFIRM = 0x1;
|
|
/** @hide */
|
public static final String ACTION_HANDOVER_TRANSFER_STARTED =
|
"android.nfc.action.HANDOVER_TRANSFER_STARTED";
|
|
/** @hide */
|
public static final String ACTION_HANDOVER_TRANSFER_DONE =
|
"android.nfc.action.HANDOVER_TRANSFER_DONE";
|
|
/** @hide */
|
public static final String EXTRA_HANDOVER_TRANSFER_STATUS =
|
"android.nfc.extra.HANDOVER_TRANSFER_STATUS";
|
|
/** @hide */
|
public static final int HANDOVER_TRANSFER_STATUS_SUCCESS = 0;
|
/** @hide */
|
public static final int HANDOVER_TRANSFER_STATUS_FAILURE = 1;
|
|
/** @hide */
|
public static final String EXTRA_HANDOVER_TRANSFER_URI =
|
"android.nfc.extra.HANDOVER_TRANSFER_URI";
|
|
// Guarded by NfcAdapter.class
|
static boolean sIsInitialized = false;
|
static boolean sHasNfcFeature;
|
static boolean sHasBeamFeature;
|
|
// Final after first constructor, except for
|
// attemptDeadServiceRecovery() when NFC crashes - we accept a best effort
|
// recovery
|
@UnsupportedAppUsage
|
static INfcAdapter sService;
|
static INfcTag sTagService;
|
static INfcCardEmulation sCardEmulationService;
|
static INfcFCardEmulation sNfcFCardEmulationService;
|
|
/**
|
* The NfcAdapter object for each application context.
|
* There is a 1-1 relationship between application context and
|
* NfcAdapter object.
|
*/
|
static HashMap<Context, NfcAdapter> sNfcAdapters = new HashMap(); //guard by NfcAdapter.class
|
|
/**
|
* NfcAdapter used with a null context. This ctor was deprecated but we have
|
* to support it for backwards compatibility. New methods that require context
|
* might throw when called on the null-context NfcAdapter.
|
*/
|
static NfcAdapter sNullContextNfcAdapter; // protected by NfcAdapter.class
|
|
final NfcActivityManager mNfcActivityManager;
|
final Context mContext;
|
final HashMap<NfcUnlockHandler, INfcUnlockHandler> mNfcUnlockHandlers;
|
final Object mLock;
|
|
ITagRemovedCallback mTagRemovedListener; // protected by mLock
|
|
/**
|
* A callback to be invoked when the system finds a tag while the foreground activity is
|
* operating in reader mode.
|
* <p>Register your {@code ReaderCallback} implementation with {@link
|
* NfcAdapter#enableReaderMode} and disable it with {@link
|
* NfcAdapter#disableReaderMode}.
|
* @see NfcAdapter#enableReaderMode
|
*/
|
public interface ReaderCallback {
|
public void onTagDiscovered(Tag tag);
|
}
|
|
/**
|
* A callback to be invoked when the system successfully delivers your {@link NdefMessage}
|
* to another device.
|
* @see #setOnNdefPushCompleteCallback
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public interface OnNdefPushCompleteCallback {
|
/**
|
* Called on successful NDEF push.
|
*
|
* <p>This callback is usually made on a binder thread (not the UI thread).
|
*
|
* @param event {@link NfcEvent} with the {@link NfcEvent#nfcAdapter} field set
|
* @see #setNdefPushMessageCallback
|
*/
|
public void onNdefPushComplete(NfcEvent event);
|
}
|
|
/**
|
* A callback to be invoked when another NFC device capable of NDEF push (Android Beam)
|
* is within range.
|
* <p>Implement this interface and pass it to {@link
|
* NfcAdapter#setNdefPushMessageCallback setNdefPushMessageCallback()} in order to create an
|
* {@link NdefMessage} at the moment that another device is within range for NFC. Using this
|
* callback allows you to create a message with data that might vary based on the
|
* content currently visible to the user. Alternatively, you can call {@link
|
* #setNdefPushMessage setNdefPushMessage()} if the {@link NdefMessage} always contains the
|
* same data.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public interface CreateNdefMessageCallback {
|
/**
|
* Called to provide a {@link NdefMessage} to push.
|
*
|
* <p>This callback is usually made on a binder thread (not the UI thread).
|
*
|
* <p>Called when this device is in range of another device
|
* that might support NDEF push. It allows the application to
|
* create the NDEF message only when it is required.
|
*
|
* <p>NDEF push cannot occur until this method returns, so do not
|
* block for too long.
|
*
|
* <p>The Android operating system will usually show a system UI
|
* on top of your activity during this time, so do not try to request
|
* input from the user to complete the callback, or provide custom NDEF
|
* push UI. The user probably will not see it.
|
*
|
* @param event {@link NfcEvent} with the {@link NfcEvent#nfcAdapter} field set
|
* @return NDEF message to push, or null to not provide a message
|
*/
|
public NdefMessage createNdefMessage(NfcEvent event);
|
}
|
|
|
/**
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public interface CreateBeamUrisCallback {
|
public Uri[] createBeamUris(NfcEvent event);
|
}
|
|
/**
|
* A callback that is invoked when a tag is removed from the field.
|
* @see NfcAdapter#ignore
|
*/
|
public interface OnTagRemovedListener {
|
void onTagRemoved();
|
}
|
|
/**
|
* A callback to be invoked when an application has registered as a
|
* handler to unlock the device given an NFC tag at the lockscreen.
|
* @hide
|
*/
|
@SystemApi
|
public interface NfcUnlockHandler {
|
/**
|
* Called at the lock screen to attempt to unlock the device with the given tag.
|
* @param tag the detected tag, to be used to unlock the device
|
* @return true if the device was successfully unlocked
|
*/
|
public boolean onUnlockAttempted(Tag tag);
|
}
|
|
/**
|
* Helper to check if this device has FEATURE_NFC_BEAM, but without using
|
* a context.
|
* Equivalent to
|
* context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_NFC_BEAM)
|
*/
|
private static boolean hasBeamFeature() {
|
IPackageManager pm = ActivityThread.getPackageManager();
|
if (pm == null) {
|
Log.e(TAG, "Cannot get package manager, assuming no Android Beam feature");
|
return false;
|
}
|
try {
|
return pm.hasSystemFeature(PackageManager.FEATURE_NFC_BEAM, 0);
|
} catch (RemoteException e) {
|
Log.e(TAG, "Package manager query failed, assuming no Android Beam feature", e);
|
return false;
|
}
|
}
|
|
/**
|
* Helper to check if this device has FEATURE_NFC, but without using
|
* a context.
|
* Equivalent to
|
* context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_NFC)
|
*/
|
private static boolean hasNfcFeature() {
|
IPackageManager pm = ActivityThread.getPackageManager();
|
if (pm == null) {
|
Log.e(TAG, "Cannot get package manager, assuming no NFC feature");
|
return false;
|
}
|
try {
|
return pm.hasSystemFeature(PackageManager.FEATURE_NFC, 0);
|
} catch (RemoteException e) {
|
Log.e(TAG, "Package manager query failed, assuming no NFC feature", e);
|
return false;
|
}
|
}
|
|
/**
|
* Helper to check if this device is NFC HCE capable, by checking for
|
* FEATURE_NFC_HOST_CARD_EMULATION and/or FEATURE_NFC_HOST_CARD_EMULATION_NFCF,
|
* but without using a context.
|
*/
|
private static boolean hasNfcHceFeature() {
|
IPackageManager pm = ActivityThread.getPackageManager();
|
if (pm == null) {
|
Log.e(TAG, "Cannot get package manager, assuming no NFC feature");
|
return false;
|
}
|
try {
|
return pm.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION, 0)
|
|| pm.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION_NFCF, 0);
|
} catch (RemoteException e) {
|
Log.e(TAG, "Package manager query failed, assuming no NFC feature", e);
|
return false;
|
}
|
}
|
|
/**
|
* Return list of Secure Elements which support off host card emulation.
|
*
|
* @return List<String> containing secure elements on the device which supports
|
* off host card emulation. eSE for Embedded secure element,
|
* SIM for UICC and so on.
|
* @hide
|
*/
|
public @NonNull List<String> getSupportedOffHostSecureElements() {
|
List<String> offHostSE = new ArrayList<String>();
|
IPackageManager pm = ActivityThread.getPackageManager();
|
if (pm == null) {
|
Log.e(TAG, "Cannot get package manager, assuming no off-host CE feature");
|
return offHostSE;
|
}
|
try {
|
if (pm.hasSystemFeature(PackageManager.FEATURE_NFC_OFF_HOST_CARD_EMULATION_UICC, 0)) {
|
offHostSE.add("SIM");
|
}
|
if (pm.hasSystemFeature(PackageManager.FEATURE_NFC_OFF_HOST_CARD_EMULATION_ESE, 0)) {
|
offHostSE.add("eSE");
|
}
|
} catch (RemoteException e) {
|
Log.e(TAG, "Package manager query failed, assuming no off-host CE feature", e);
|
offHostSE.clear();
|
return offHostSE;
|
}
|
return offHostSE;
|
}
|
|
/**
|
* Returns the NfcAdapter for application context,
|
* or throws if NFC is not available.
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public static synchronized NfcAdapter getNfcAdapter(Context context) {
|
if (!sIsInitialized) {
|
sHasNfcFeature = hasNfcFeature();
|
sHasBeamFeature = hasBeamFeature();
|
boolean hasHceFeature = hasNfcHceFeature();
|
/* is this device meant to have NFC */
|
if (!sHasNfcFeature && !hasHceFeature) {
|
Log.v(TAG, "this device does not have NFC support");
|
throw new UnsupportedOperationException();
|
}
|
sService = getServiceInterface();
|
if (sService == null) {
|
Log.e(TAG, "could not retrieve NFC service");
|
throw new UnsupportedOperationException();
|
}
|
if (sHasNfcFeature) {
|
try {
|
sTagService = sService.getNfcTagInterface();
|
} catch (RemoteException e) {
|
Log.e(TAG, "could not retrieve NFC Tag service");
|
throw new UnsupportedOperationException();
|
}
|
}
|
if (hasHceFeature) {
|
try {
|
sNfcFCardEmulationService = sService.getNfcFCardEmulationInterface();
|
} catch (RemoteException e) {
|
Log.e(TAG, "could not retrieve NFC-F card emulation service");
|
throw new UnsupportedOperationException();
|
}
|
try {
|
sCardEmulationService = sService.getNfcCardEmulationInterface();
|
} catch (RemoteException e) {
|
Log.e(TAG, "could not retrieve card emulation service");
|
throw new UnsupportedOperationException();
|
}
|
}
|
|
sIsInitialized = true;
|
}
|
if (context == null) {
|
if (sNullContextNfcAdapter == null) {
|
sNullContextNfcAdapter = new NfcAdapter(null);
|
}
|
return sNullContextNfcAdapter;
|
}
|
NfcAdapter adapter = sNfcAdapters.get(context);
|
if (adapter == null) {
|
adapter = new NfcAdapter(context);
|
sNfcAdapters.put(context, adapter);
|
}
|
return adapter;
|
}
|
|
/** get handle to NFC service interface */
|
private static INfcAdapter getServiceInterface() {
|
/* get a handle to NFC service */
|
IBinder b = ServiceManager.getService("nfc");
|
if (b == null) {
|
return null;
|
}
|
return INfcAdapter.Stub.asInterface(b);
|
}
|
|
/**
|
* Helper to get the default NFC Adapter.
|
* <p>
|
* Most Android devices will only have one NFC Adapter (NFC Controller).
|
* <p>
|
* This helper is the equivalent of:
|
* <pre>
|
* NfcManager manager = (NfcManager) context.getSystemService(Context.NFC_SERVICE);
|
* NfcAdapter adapter = manager.getDefaultAdapter();</pre>
|
* @param context the calling application's context
|
*
|
* @return the default NFC adapter, or null if no NFC adapter exists
|
*/
|
public static NfcAdapter getDefaultAdapter(Context context) {
|
if (context == null) {
|
throw new IllegalArgumentException("context cannot be null");
|
}
|
context = context.getApplicationContext();
|
if (context == null) {
|
throw new IllegalArgumentException(
|
"context not associated with any application (using a mock context?)");
|
}
|
/* use getSystemService() for consistency */
|
NfcManager manager = (NfcManager) context.getSystemService(Context.NFC_SERVICE);
|
if (manager == null) {
|
// NFC not available
|
return null;
|
}
|
return manager.getDefaultAdapter();
|
}
|
|
/**
|
* Legacy NfcAdapter getter, always use {@link #getDefaultAdapter(Context)} instead.<p>
|
* This method was deprecated at API level 10 (Gingerbread MR1) because a context is required
|
* for many NFC API methods. Those methods will fail when called on an NfcAdapter
|
* object created from this method.<p>
|
* @deprecated use {@link #getDefaultAdapter(Context)}
|
* @hide
|
*/
|
@Deprecated
|
@UnsupportedAppUsage
|
public static NfcAdapter getDefaultAdapter() {
|
// introduced in API version 9 (GB 2.3)
|
// deprecated in API version 10 (GB 2.3.3)
|
// removed from public API in version 16 (ICS MR2)
|
// should maintain as a hidden API for binary compatibility for a little longer
|
Log.w(TAG, "WARNING: NfcAdapter.getDefaultAdapter() is deprecated, use " +
|
"NfcAdapter.getDefaultAdapter(Context) instead", new Exception());
|
|
return NfcAdapter.getNfcAdapter(null);
|
}
|
|
NfcAdapter(Context context) {
|
mContext = context;
|
mNfcActivityManager = new NfcActivityManager(this);
|
mNfcUnlockHandlers = new HashMap<NfcUnlockHandler, INfcUnlockHandler>();
|
mTagRemovedListener = null;
|
mLock = new Object();
|
}
|
|
/**
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public Context getContext() {
|
return mContext;
|
}
|
|
/**
|
* Returns the binder interface to the service.
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public INfcAdapter getService() {
|
isEnabled(); // NOP call to recover sService if it is stale
|
return sService;
|
}
|
|
/**
|
* Returns the binder interface to the tag service.
|
* @hide
|
*/
|
public INfcTag getTagService() {
|
isEnabled(); // NOP call to recover sTagService if it is stale
|
return sTagService;
|
}
|
|
/**
|
* Returns the binder interface to the card emulation service.
|
* @hide
|
*/
|
public INfcCardEmulation getCardEmulationService() {
|
isEnabled();
|
return sCardEmulationService;
|
}
|
|
/**
|
* Returns the binder interface to the NFC-F card emulation service.
|
* @hide
|
*/
|
public INfcFCardEmulation getNfcFCardEmulationService() {
|
isEnabled();
|
return sNfcFCardEmulationService;
|
}
|
|
/**
|
* Returns the binder interface to the NFC-DTA test interface.
|
* @hide
|
*/
|
public INfcDta getNfcDtaInterface() {
|
if (mContext == null) {
|
throw new UnsupportedOperationException("You need a context on NfcAdapter to use the "
|
+ " NFC extras APIs");
|
}
|
try {
|
return sService.getNfcDtaInterface(mContext.getPackageName());
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return null;
|
}
|
}
|
|
/**
|
* NFC service dead - attempt best effort recovery
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public void attemptDeadServiceRecovery(Exception e) {
|
Log.e(TAG, "NFC service dead - attempting to recover", e);
|
INfcAdapter service = getServiceInterface();
|
if (service == null) {
|
Log.e(TAG, "could not retrieve NFC service during service recovery");
|
// nothing more can be done now, sService is still stale, we'll hit
|
// this recovery path again later
|
return;
|
}
|
// assigning to sService is not thread-safe, but this is best-effort code
|
// and on a well-behaved system should never happen
|
sService = service;
|
try {
|
sTagService = service.getNfcTagInterface();
|
} catch (RemoteException ee) {
|
Log.e(TAG, "could not retrieve NFC tag service during service recovery");
|
// nothing more can be done now, sService is still stale, we'll hit
|
// this recovery path again later
|
return;
|
}
|
|
try {
|
sCardEmulationService = service.getNfcCardEmulationInterface();
|
} catch (RemoteException ee) {
|
Log.e(TAG, "could not retrieve NFC card emulation service during service recovery");
|
}
|
|
try {
|
sNfcFCardEmulationService = service.getNfcFCardEmulationInterface();
|
} catch (RemoteException ee) {
|
Log.e(TAG, "could not retrieve NFC-F card emulation service during service recovery");
|
}
|
|
return;
|
}
|
|
/**
|
* Return true if this NFC Adapter has any features enabled.
|
*
|
* <p>If this method returns false, the NFC hardware is guaranteed not to
|
* generate or respond to any NFC communication over its NFC radio.
|
* <p>Applications can use this to check if NFC is enabled. Applications
|
* can request Settings UI allowing the user to toggle NFC using:
|
* <p><pre>startActivity(new Intent(Settings.ACTION_NFC_SETTINGS))</pre>
|
*
|
* @see android.provider.Settings#ACTION_NFC_SETTINGS
|
* @return true if this NFC Adapter has any features enabled
|
*/
|
public boolean isEnabled() {
|
try {
|
return sService.getState() == STATE_ON;
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Return the state of this NFC Adapter.
|
*
|
* <p>Returns one of {@link #STATE_ON}, {@link #STATE_TURNING_ON},
|
* {@link #STATE_OFF}, {@link #STATE_TURNING_OFF}.
|
*
|
* <p>{@link #isEnabled()} is equivalent to
|
* <code>{@link #getAdapterState()} == {@link #STATE_ON}</code>
|
*
|
* @return the current state of this NFC adapter
|
*
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public int getAdapterState() {
|
try {
|
return sService.getState();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return NfcAdapter.STATE_OFF;
|
}
|
}
|
|
/**
|
* Enable NFC hardware.
|
*
|
* <p>This call is asynchronous. Listen for
|
* {@link #ACTION_ADAPTER_STATE_CHANGED} broadcasts to find out when the
|
* operation is complete.
|
*
|
* <p>If this returns true, then either NFC is already on, or
|
* a {@link #ACTION_ADAPTER_STATE_CHANGED} broadcast will be sent
|
* to indicate a state transition. If this returns false, then
|
* there is some problem that prevents an attempt to turn
|
* NFC on (for example we are in airplane mode and NFC is not
|
* toggleable in airplane mode on this platform).
|
*
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean enable() {
|
try {
|
return sService.enable();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Disable NFC hardware.
|
*
|
* <p>No NFC features will work after this call, and the hardware
|
* will not perform or respond to any NFC communication.
|
*
|
* <p>This call is asynchronous. Listen for
|
* {@link #ACTION_ADAPTER_STATE_CHANGED} broadcasts to find out when the
|
* operation is complete.
|
*
|
* <p>If this returns true, then either NFC is already off, or
|
* a {@link #ACTION_ADAPTER_STATE_CHANGED} broadcast will be sent
|
* to indicate a state transition. If this returns false, then
|
* there is some problem that prevents an attempt to turn
|
* NFC off.
|
*
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean disable() {
|
try {
|
return sService.disable(true);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Disable NFC hardware.
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean disable(boolean persist) {
|
try {
|
return sService.disable(persist);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Pauses polling for a {@code timeoutInMs} millis. If polling must be resumed before timeout,
|
* use {@link #resumePolling()}.
|
* @hide
|
*/
|
public void pausePolling(int timeoutInMs) {
|
try {
|
sService.pausePolling(timeoutInMs);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
}
|
}
|
|
/**
|
* Resumes default polling for the current device state if polling is paused. Calling
|
* this while polling is not paused is a no-op.
|
*
|
* @hide
|
*/
|
public void resumePolling() {
|
try {
|
sService.resumePolling();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
}
|
}
|
|
/**
|
* Set one or more {@link Uri}s to send using Android Beam (TM). Every
|
* Uri you provide must have either scheme 'file' or scheme 'content'.
|
*
|
* <p>For the data provided through this method, Android Beam tries to
|
* switch to alternate transports such as Bluetooth to achieve a fast
|
* transfer speed. Hence this method is very suitable
|
* for transferring large files such as pictures or songs.
|
*
|
* <p>The receiving side will store the content of each Uri in
|
* a file and present a notification to the user to open the file
|
* with a {@link android.content.Intent} with action
|
* {@link android.content.Intent#ACTION_VIEW}.
|
* If multiple URIs are sent, the {@link android.content.Intent} will refer
|
* to the first of the stored files.
|
*
|
* <p>This method may be called at any time before {@link Activity#onDestroy},
|
* but the URI(s) are only made available for Android Beam when the
|
* specified activity(s) are in resumed (foreground) state. The recommended
|
* approach is to call this method during your Activity's
|
* {@link Activity#onCreate} - see sample
|
* code below. This method does not immediately perform any I/O or blocking work,
|
* so is safe to call on your main thread.
|
*
|
* <p>{@link #setBeamPushUris} and {@link #setBeamPushUrisCallback}
|
* have priority over both {@link #setNdefPushMessage} and
|
* {@link #setNdefPushMessageCallback}.
|
*
|
* <p>If {@link #setBeamPushUris} is called with a null Uri array,
|
* and/or {@link #setBeamPushUrisCallback} is called with a null callback,
|
* then the Uri push will be completely disabled for the specified activity(s).
|
*
|
* <p>Code example:
|
* <pre>
|
* protected void onCreate(Bundle savedInstanceState) {
|
* super.onCreate(savedInstanceState);
|
* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
|
* if (nfcAdapter == null) return; // NFC not available on this device
|
* nfcAdapter.setBeamPushUris(new Uri[] {uri1, uri2}, this);
|
* }</pre>
|
* And that is it. Only one call per activity is necessary. The Android
|
* OS will automatically release its references to the Uri(s) and the
|
* Activity object when it is destroyed if you follow this pattern.
|
*
|
* <p>If your Activity wants to dynamically supply Uri(s),
|
* then set a callback using {@link #setBeamPushUrisCallback} instead
|
* of using this method.
|
*
|
* <p class="note">Do not pass in an Activity that has already been through
|
* {@link Activity#onDestroy}. This is guaranteed if you call this API
|
* during {@link Activity#onCreate}.
|
*
|
* <p class="note">If this device does not support alternate transports
|
* such as Bluetooth or WiFI, calling this method does nothing.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param uris an array of Uri(s) to push over Android Beam
|
* @param activity activity for which the Uri(s) will be pushed
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public void setBeamPushUris(Uri[] uris, Activity activity) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
if (uris != null) {
|
for (Uri uri : uris) {
|
if (uri == null) throw new NullPointerException("Uri not " +
|
"allowed to be null");
|
String scheme = uri.getScheme();
|
if (scheme == null || (!scheme.equalsIgnoreCase("file") &&
|
!scheme.equalsIgnoreCase("content"))) {
|
throw new IllegalArgumentException("URI needs to have " +
|
"either scheme file or scheme content");
|
}
|
}
|
}
|
mNfcActivityManager.setNdefPushContentUri(activity, uris);
|
}
|
|
/**
|
* Set a callback that will dynamically generate one or more {@link Uri}s
|
* to send using Android Beam (TM). Every Uri the callback provides
|
* must have either scheme 'file' or scheme 'content'.
|
*
|
* <p>For the data provided through this callback, Android Beam tries to
|
* switch to alternate transports such as Bluetooth to achieve a fast
|
* transfer speed. Hence this method is very suitable
|
* for transferring large files such as pictures or songs.
|
*
|
* <p>The receiving side will store the content of each Uri in
|
* a file and present a notification to the user to open the file
|
* with a {@link android.content.Intent} with action
|
* {@link android.content.Intent#ACTION_VIEW}.
|
* If multiple URIs are sent, the {@link android.content.Intent} will refer
|
* to the first of the stored files.
|
*
|
* <p>This method may be called at any time before {@link Activity#onDestroy},
|
* but the URI(s) are only made available for Android Beam when the
|
* specified activity(s) are in resumed (foreground) state. The recommended
|
* approach is to call this method during your Activity's
|
* {@link Activity#onCreate} - see sample
|
* code below. This method does not immediately perform any I/O or blocking work,
|
* so is safe to call on your main thread.
|
*
|
* <p>{@link #setBeamPushUris} and {@link #setBeamPushUrisCallback}
|
* have priority over both {@link #setNdefPushMessage} and
|
* {@link #setNdefPushMessageCallback}.
|
*
|
* <p>If {@link #setBeamPushUris} is called with a null Uri array,
|
* and/or {@link #setBeamPushUrisCallback} is called with a null callback,
|
* then the Uri push will be completely disabled for the specified activity(s).
|
*
|
* <p>Code example:
|
* <pre>
|
* protected void onCreate(Bundle savedInstanceState) {
|
* super.onCreate(savedInstanceState);
|
* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
|
* if (nfcAdapter == null) return; // NFC not available on this device
|
* nfcAdapter.setBeamPushUrisCallback(callback, this);
|
* }</pre>
|
* And that is it. Only one call per activity is necessary. The Android
|
* OS will automatically release its references to the Uri(s) and the
|
* Activity object when it is destroyed if you follow this pattern.
|
*
|
* <p class="note">Do not pass in an Activity that has already been through
|
* {@link Activity#onDestroy}. This is guaranteed if you call this API
|
* during {@link Activity#onCreate}.
|
*
|
* <p class="note">If this device does not support alternate transports
|
* such as Bluetooth or WiFI, calling this method does nothing.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param callback callback, or null to disable
|
* @param activity activity for which the Uri(s) will be pushed
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public void setBeamPushUrisCallback(CreateBeamUrisCallback callback, Activity activity) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
mNfcActivityManager.setNdefPushContentUriCallback(activity, callback);
|
}
|
|
/**
|
* Set a static {@link NdefMessage} to send using Android Beam (TM).
|
*
|
* <p>This method may be called at any time before {@link Activity#onDestroy},
|
* but the NDEF message is only made available for NDEF push when the
|
* specified activity(s) are in resumed (foreground) state. The recommended
|
* approach is to call this method during your Activity's
|
* {@link Activity#onCreate} - see sample
|
* code below. This method does not immediately perform any I/O or blocking work,
|
* so is safe to call on your main thread.
|
*
|
* <p>Only one NDEF message can be pushed by the currently resumed activity.
|
* If both {@link #setNdefPushMessage} and
|
* {@link #setNdefPushMessageCallback} are set, then
|
* the callback will take priority.
|
*
|
* <p>If neither {@link #setNdefPushMessage} or
|
* {@link #setNdefPushMessageCallback} have been called for your activity, then
|
* the Android OS may choose to send a default NDEF message on your behalf,
|
* such as a URI for your application.
|
*
|
* <p>If {@link #setNdefPushMessage} is called with a null NDEF message,
|
* and/or {@link #setNdefPushMessageCallback} is called with a null callback,
|
* then NDEF push will be completely disabled for the specified activity(s).
|
* This also disables any default NDEF message the Android OS would have
|
* otherwise sent on your behalf for those activity(s).
|
*
|
* <p>If you want to prevent the Android OS from sending default NDEF
|
* messages completely (for all activities), you can include a
|
* {@code <meta-data>} element inside the {@code <application>}
|
* element of your AndroidManifest.xml file, like this:
|
* <pre>
|
* <application ...>
|
* <meta-data android:name="android.nfc.disable_beam_default"
|
* android:value="true" />
|
* </application></pre>
|
*
|
* <p>The API allows for multiple activities to be specified at a time,
|
* but it is strongly recommended to just register one at a time,
|
* and to do so during the activity's {@link Activity#onCreate}. For example:
|
* <pre>
|
* protected void onCreate(Bundle savedInstanceState) {
|
* super.onCreate(savedInstanceState);
|
* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
|
* if (nfcAdapter == null) return; // NFC not available on this device
|
* nfcAdapter.setNdefPushMessage(ndefMessage, this);
|
* }</pre>
|
* And that is it. Only one call per activity is necessary. The Android
|
* OS will automatically release its references to the NDEF message and the
|
* Activity object when it is destroyed if you follow this pattern.
|
*
|
* <p>If your Activity wants to dynamically generate an NDEF message,
|
* then set a callback using {@link #setNdefPushMessageCallback} instead
|
* of a static message.
|
*
|
* <p class="note">Do not pass in an Activity that has already been through
|
* {@link Activity#onDestroy}. This is guaranteed if you call this API
|
* during {@link Activity#onCreate}.
|
*
|
* <p class="note">For sending large content such as pictures and songs,
|
* consider using {@link #setBeamPushUris}, which switches to alternate transports
|
* such as Bluetooth to achieve a fast transfer rate.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param message NDEF message to push over NFC, or null to disable
|
* @param activity activity for which the NDEF message will be pushed
|
* @param activities optional additional activities, however we strongly recommend
|
* to only register one at a time, and to do so in that activity's
|
* {@link Activity#onCreate}
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public void setNdefPushMessage(NdefMessage message, Activity activity,
|
Activity ... activities) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
int targetSdkVersion = getSdkVersion();
|
try {
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
mNfcActivityManager.setNdefPushMessage(activity, message, 0);
|
for (Activity a : activities) {
|
if (a == null) {
|
throw new NullPointerException("activities cannot contain null");
|
}
|
mNfcActivityManager.setNdefPushMessage(a, message, 0);
|
}
|
} catch (IllegalStateException e) {
|
if (targetSdkVersion < android.os.Build.VERSION_CODES.JELLY_BEAN) {
|
// Less strict on old applications - just log the error
|
Log.e(TAG, "Cannot call API with Activity that has already " +
|
"been destroyed", e);
|
} else {
|
// Prevent new applications from making this mistake, re-throw
|
throw(e);
|
}
|
}
|
}
|
|
/**
|
* @hide
|
*/
|
@SystemApi
|
public void setNdefPushMessage(NdefMessage message, Activity activity, int flags) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
mNfcActivityManager.setNdefPushMessage(activity, message, flags);
|
}
|
|
/**
|
* Set a callback that dynamically generates NDEF messages to send using Android Beam (TM).
|
*
|
* <p>This method may be called at any time before {@link Activity#onDestroy},
|
* but the NDEF message callback can only occur when the
|
* specified activity(s) are in resumed (foreground) state. The recommended
|
* approach is to call this method during your Activity's
|
* {@link Activity#onCreate} - see sample
|
* code below. This method does not immediately perform any I/O or blocking work,
|
* so is safe to call on your main thread.
|
*
|
* <p>Only one NDEF message can be pushed by the currently resumed activity.
|
* If both {@link #setNdefPushMessage} and
|
* {@link #setNdefPushMessageCallback} are set, then
|
* the callback will take priority.
|
*
|
* <p>If neither {@link #setNdefPushMessage} or
|
* {@link #setNdefPushMessageCallback} have been called for your activity, then
|
* the Android OS may choose to send a default NDEF message on your behalf,
|
* such as a URI for your application.
|
*
|
* <p>If {@link #setNdefPushMessage} is called with a null NDEF message,
|
* and/or {@link #setNdefPushMessageCallback} is called with a null callback,
|
* then NDEF push will be completely disabled for the specified activity(s).
|
* This also disables any default NDEF message the Android OS would have
|
* otherwise sent on your behalf for those activity(s).
|
*
|
* <p>If you want to prevent the Android OS from sending default NDEF
|
* messages completely (for all activities), you can include a
|
* {@code <meta-data>} element inside the {@code <application>}
|
* element of your AndroidManifest.xml file, like this:
|
* <pre>
|
* <application ...>
|
* <meta-data android:name="android.nfc.disable_beam_default"
|
* android:value="true" />
|
* </application></pre>
|
*
|
* <p>The API allows for multiple activities to be specified at a time,
|
* but it is strongly recommended to just register one at a time,
|
* and to do so during the activity's {@link Activity#onCreate}. For example:
|
* <pre>
|
* protected void onCreate(Bundle savedInstanceState) {
|
* super.onCreate(savedInstanceState);
|
* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
|
* if (nfcAdapter == null) return; // NFC not available on this device
|
* nfcAdapter.setNdefPushMessageCallback(callback, this);
|
* }</pre>
|
* And that is it. Only one call per activity is necessary. The Android
|
* OS will automatically release its references to the callback and the
|
* Activity object when it is destroyed if you follow this pattern.
|
*
|
* <p class="note">Do not pass in an Activity that has already been through
|
* {@link Activity#onDestroy}. This is guaranteed if you call this API
|
* during {@link Activity#onCreate}.
|
* <p class="note">For sending large content such as pictures and songs,
|
* consider using {@link #setBeamPushUris}, which switches to alternate transports
|
* such as Bluetooth to achieve a fast transfer rate.
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param callback callback, or null to disable
|
* @param activity activity for which the NDEF message will be pushed
|
* @param activities optional additional activities, however we strongly recommend
|
* to only register one at a time, and to do so in that activity's
|
* {@link Activity#onCreate}
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public void setNdefPushMessageCallback(CreateNdefMessageCallback callback, Activity activity,
|
Activity ... activities) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
int targetSdkVersion = getSdkVersion();
|
try {
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
mNfcActivityManager.setNdefPushMessageCallback(activity, callback, 0);
|
for (Activity a : activities) {
|
if (a == null) {
|
throw new NullPointerException("activities cannot contain null");
|
}
|
mNfcActivityManager.setNdefPushMessageCallback(a, callback, 0);
|
}
|
} catch (IllegalStateException e) {
|
if (targetSdkVersion < android.os.Build.VERSION_CODES.JELLY_BEAN) {
|
// Less strict on old applications - just log the error
|
Log.e(TAG, "Cannot call API with Activity that has already " +
|
"been destroyed", e);
|
} else {
|
// Prevent new applications from making this mistake, re-throw
|
throw(e);
|
}
|
}
|
}
|
|
/**
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public void setNdefPushMessageCallback(CreateNdefMessageCallback callback, Activity activity,
|
int flags) {
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
mNfcActivityManager.setNdefPushMessageCallback(activity, callback, flags);
|
}
|
|
/**
|
* Set a callback on successful Android Beam (TM).
|
*
|
* <p>This method may be called at any time before {@link Activity#onDestroy},
|
* but the callback can only occur when the
|
* specified activity(s) are in resumed (foreground) state. The recommended
|
* approach is to call this method during your Activity's
|
* {@link Activity#onCreate} - see sample
|
* code below. This method does not immediately perform any I/O or blocking work,
|
* so is safe to call on your main thread.
|
*
|
* <p>The API allows for multiple activities to be specified at a time,
|
* but it is strongly recommended to just register one at a time,
|
* and to do so during the activity's {@link Activity#onCreate}. For example:
|
* <pre>
|
* protected void onCreate(Bundle savedInstanceState) {
|
* super.onCreate(savedInstanceState);
|
* NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
|
* if (nfcAdapter == null) return; // NFC not available on this device
|
* nfcAdapter.setOnNdefPushCompleteCallback(callback, this);
|
* }</pre>
|
* And that is it. Only one call per activity is necessary. The Android
|
* OS will automatically release its references to the callback and the
|
* Activity object when it is destroyed if you follow this pattern.
|
*
|
* <p class="note">Do not pass in an Activity that has already been through
|
* {@link Activity#onDestroy}. This is guaranteed if you call this API
|
* during {@link Activity#onCreate}.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param callback callback, or null to disable
|
* @param activity activity for which the NDEF message will be pushed
|
* @param activities optional additional activities, however we strongly recommend
|
* to only register one at a time, and to do so in that activity's
|
* {@link Activity#onCreate}
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public void setOnNdefPushCompleteCallback(OnNdefPushCompleteCallback callback,
|
Activity activity, Activity ... activities) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
int targetSdkVersion = getSdkVersion();
|
try {
|
if (activity == null) {
|
throw new NullPointerException("activity cannot be null");
|
}
|
mNfcActivityManager.setOnNdefPushCompleteCallback(activity, callback);
|
for (Activity a : activities) {
|
if (a == null) {
|
throw new NullPointerException("activities cannot contain null");
|
}
|
mNfcActivityManager.setOnNdefPushCompleteCallback(a, callback);
|
}
|
} catch (IllegalStateException e) {
|
if (targetSdkVersion < android.os.Build.VERSION_CODES.JELLY_BEAN) {
|
// Less strict on old applications - just log the error
|
Log.e(TAG, "Cannot call API with Activity that has already " +
|
"been destroyed", e);
|
} else {
|
// Prevent new applications from making this mistake, re-throw
|
throw(e);
|
}
|
}
|
}
|
|
/**
|
* Enable foreground dispatch to the given Activity.
|
*
|
* <p>This will give give priority to the foreground activity when
|
* dispatching a discovered {@link Tag} to an application.
|
*
|
* <p>If any IntentFilters are provided to this method they are used to match dispatch Intents
|
* for both the {@link NfcAdapter#ACTION_NDEF_DISCOVERED} and
|
* {@link NfcAdapter#ACTION_TAG_DISCOVERED}. Since {@link NfcAdapter#ACTION_TECH_DISCOVERED}
|
* relies on meta data outside of the IntentFilter matching for that dispatch Intent is handled
|
* by passing in the tech lists separately. Each first level entry in the tech list represents
|
* an array of technologies that must all be present to match. If any of the first level sets
|
* match then the dispatch is routed through the given PendingIntent. In other words, the second
|
* level is ANDed together and the first level entries are ORed together.
|
*
|
* <p>If you pass {@code null} for both the {@code filters} and {@code techLists} parameters
|
* that acts a wild card and will cause the foreground activity to receive all tags via the
|
* {@link NfcAdapter#ACTION_TAG_DISCOVERED} intent.
|
*
|
* <p>This method must be called from the main thread, and only when the activity is in the
|
* foreground (resumed). Also, activities must call {@link #disableForegroundDispatch} before
|
* the completion of their {@link Activity#onPause} callback to disable foreground dispatch
|
* after it has been enabled.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param activity the Activity to dispatch to
|
* @param intent the PendingIntent to start for the dispatch
|
* @param filters the IntentFilters to override dispatching for, or null to always dispatch
|
* @param techLists the tech lists used to perform matching for dispatching of the
|
* {@link NfcAdapter#ACTION_TECH_DISCOVERED} intent
|
* @throws IllegalStateException if the Activity is not currently in the foreground
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
*/
|
public void enableForegroundDispatch(Activity activity, PendingIntent intent,
|
IntentFilter[] filters, String[][] techLists) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
if (activity == null || intent == null) {
|
throw new NullPointerException();
|
}
|
if (!activity.isResumed()) {
|
throw new IllegalStateException("Foreground dispatch can only be enabled " +
|
"when your activity is resumed");
|
}
|
try {
|
TechListParcel parcel = null;
|
if (techLists != null && techLists.length > 0) {
|
parcel = new TechListParcel(techLists);
|
}
|
ActivityThread.currentActivityThread().registerOnActivityPausedListener(activity,
|
mForegroundDispatchListener);
|
sService.setForegroundDispatch(intent, filters, parcel);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
}
|
}
|
|
/**
|
* Disable foreground dispatch to the given activity.
|
*
|
* <p>After calling {@link #enableForegroundDispatch}, an activity
|
* must call this method before its {@link Activity#onPause} callback
|
* completes.
|
*
|
* <p>This method must be called from the main thread.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param activity the Activity to disable dispatch to
|
* @throws IllegalStateException if the Activity has already been paused
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
*/
|
public void disableForegroundDispatch(Activity activity) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
ActivityThread.currentActivityThread().unregisterOnActivityPausedListener(activity,
|
mForegroundDispatchListener);
|
disableForegroundDispatchInternal(activity, false);
|
}
|
|
OnActivityPausedListener mForegroundDispatchListener = new OnActivityPausedListener() {
|
@Override
|
public void onPaused(Activity activity) {
|
disableForegroundDispatchInternal(activity, true);
|
}
|
};
|
|
void disableForegroundDispatchInternal(Activity activity, boolean force) {
|
try {
|
sService.setForegroundDispatch(null, null, null);
|
if (!force && !activity.isResumed()) {
|
throw new IllegalStateException("You must disable foreground dispatching " +
|
"while your activity is still resumed");
|
}
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
}
|
}
|
|
/**
|
* Limit the NFC controller to reader mode while this Activity is in the foreground.
|
*
|
* <p>In this mode the NFC controller will only act as an NFC tag reader/writer,
|
* thus disabling any peer-to-peer (Android Beam) and card-emulation modes of
|
* the NFC adapter on this device.
|
*
|
* <p>Use {@link #FLAG_READER_SKIP_NDEF_CHECK} to prevent the platform from
|
* performing any NDEF checks in reader mode. Note that this will prevent the
|
* {@link Ndef} tag technology from being enumerated on the tag, and that
|
* NDEF-based tag dispatch will not be functional.
|
*
|
* <p>For interacting with tags that are emulated on another Android device
|
* using Android's host-based card-emulation, the recommended flags are
|
* {@link #FLAG_READER_NFC_A} and {@link #FLAG_READER_SKIP_NDEF_CHECK}.
|
*
|
* @param activity the Activity that requests the adapter to be in reader mode
|
* @param callback the callback to be called when a tag is discovered
|
* @param flags Flags indicating poll technologies and other optional parameters
|
* @param extras Additional extras for configuring reader mode.
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
*/
|
public void enableReaderMode(Activity activity, ReaderCallback callback, int flags,
|
Bundle extras) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
mNfcActivityManager.enableReaderMode(activity, callback, flags, extras);
|
}
|
|
/**
|
* Restore the NFC adapter to normal mode of operation: supporting
|
* peer-to-peer (Android Beam), card emulation, and polling for
|
* all supported tag technologies.
|
*
|
* @param activity the Activity that currently has reader mode enabled
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
*/
|
public void disableReaderMode(Activity activity) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
mNfcActivityManager.disableReaderMode(activity);
|
}
|
|
/**
|
* Manually invoke Android Beam to share data.
|
*
|
* <p>The Android Beam animation is normally only shown when two NFC-capable
|
* devices come into range.
|
* By calling this method, an Activity can invoke the Beam animation directly
|
* even if no other NFC device is in range yet. The Beam animation will then
|
* prompt the user to tap another NFC-capable device to complete the data
|
* transfer.
|
*
|
* <p>The main advantage of using this method is that it avoids the need for the
|
* user to tap the screen to complete the transfer, as this method already
|
* establishes the direction of the transfer and the consent of the user to
|
* share data. Callers are responsible for making sure that the user has
|
* consented to sharing data on NFC tap.
|
*
|
* <p>Note that to use this method, the passed in Activity must have already
|
* set data to share over Beam by using method calls such as
|
* {@link #setNdefPushMessageCallback} or
|
* {@link #setBeamPushUrisCallback}.
|
*
|
* @param activity the current foreground Activity that has registered data to share
|
* @return whether the Beam animation was successfully invoked
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
public boolean invokeBeam(Activity activity) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return false;
|
}
|
}
|
if (activity == null) {
|
throw new NullPointerException("activity may not be null.");
|
}
|
enforceResumed(activity);
|
try {
|
sService.invokeBeam();
|
return true;
|
} catch (RemoteException e) {
|
Log.e(TAG, "invokeBeam: NFC process has died.");
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* @hide
|
*/
|
public boolean invokeBeam(BeamShareData shareData) {
|
try {
|
Log.e(TAG, "invokeBeamInternal()");
|
sService.invokeBeamInternal(shareData);
|
return true;
|
} catch (RemoteException e) {
|
Log.e(TAG, "invokeBeam: NFC process has died.");
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Enable NDEF message push over NFC while this Activity is in the foreground.
|
*
|
* <p>You must explicitly call this method every time the activity is
|
* resumed, and you must call {@link #disableForegroundNdefPush} before
|
* your activity completes {@link Activity#onPause}.
|
*
|
* <p>Strongly recommend to use the new {@link #setNdefPushMessage}
|
* instead: it automatically hooks into your activity life-cycle,
|
* so you do not need to call enable/disable in your onResume/onPause.
|
*
|
* <p>For NDEF push to function properly the other NFC device must
|
* support either NFC Forum's SNEP (Simple Ndef Exchange Protocol), or
|
* Android's "com.android.npp" (Ndef Push Protocol). This was optional
|
* on Gingerbread level Android NFC devices, but SNEP is mandatory on
|
* Ice-Cream-Sandwich and beyond.
|
*
|
* <p>This method must be called from the main thread.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param activity foreground activity
|
* @param message a NDEF Message to push over NFC
|
* @throws IllegalStateException if the activity is not currently in the foreground
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated use {@link #setNdefPushMessage} instead
|
*/
|
@Deprecated
|
public void enableForegroundNdefPush(Activity activity, NdefMessage message) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
if (activity == null || message == null) {
|
throw new NullPointerException();
|
}
|
enforceResumed(activity);
|
mNfcActivityManager.setNdefPushMessage(activity, message, 0);
|
}
|
|
/**
|
* Disable NDEF message push over P2P.
|
*
|
* <p>After calling {@link #enableForegroundNdefPush}, an activity
|
* must call this method before its {@link Activity#onPause} callback
|
* completes.
|
*
|
* <p>Strongly recommend to use the new {@link #setNdefPushMessage}
|
* instead: it automatically hooks into your activity life-cycle,
|
* so you do not need to call enable/disable in your onResume/onPause.
|
*
|
* <p>This method must be called from the main thread.
|
*
|
* <p class="note">Requires the {@link android.Manifest.permission#NFC} permission.
|
*
|
* @param activity the Foreground activity
|
* @throws IllegalStateException if the Activity has already been paused
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated use {@link #setNdefPushMessage} instead
|
*/
|
@Deprecated
|
public void disableForegroundNdefPush(Activity activity) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return;
|
}
|
}
|
if (activity == null) {
|
throw new NullPointerException();
|
}
|
enforceResumed(activity);
|
mNfcActivityManager.setNdefPushMessage(activity, null, 0);
|
mNfcActivityManager.setNdefPushMessageCallback(activity, null, 0);
|
mNfcActivityManager.setOnNdefPushCompleteCallback(activity, null);
|
}
|
|
/**
|
* Sets Secure NFC feature.
|
* <p>This API is for the Settings application.
|
* @return True if successful
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean enableSecureNfc(boolean enable) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
try {
|
return sService.setNfcSecure(enable);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Checks if the device supports Secure NFC functionality.
|
*
|
* @return True if device supports Secure NFC, false otherwise
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
*/
|
public boolean isSecureNfcSupported() {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
try {
|
return sService.deviceSupportsNfcSecure();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Checks Secure NFC feature is enabled.
|
*
|
* @return True if Secure NFC is enabled, false otherwise
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @throws UnsupportedOperationException if device doesn't support
|
* Secure NFC functionality. {@link #isSecureNfcSupported}
|
*/
|
public boolean isSecureNfcEnabled() {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
try {
|
return sService.isNfcSecureEnabled();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Enable NDEF Push feature.
|
* <p>This API is for the Settings application.
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean enableNdefPush() {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
try {
|
return sService.enableNdefPush();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Disable NDEF Push feature.
|
* <p>This API is for the Settings application.
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean disableNdefPush() {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
try {
|
return sService.disableNdefPush();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Return true if the NDEF Push (Android Beam) feature is enabled.
|
* <p>This function will return true only if both NFC is enabled, and the
|
* NDEF Push feature is enabled.
|
* <p>Note that if NFC is enabled but NDEF Push is disabled then this
|
* device can still <i>receive</i> NDEF messages, it just cannot send them.
|
* <p>Applications cannot directly toggle the NDEF Push feature, but they
|
* can request Settings UI allowing the user to toggle NDEF Push using
|
* <code>startActivity(new Intent(Settings.ACTION_NFCSHARING_SETTINGS))</code>
|
* <p>Example usage in an Activity that requires NDEF Push:
|
* <p><pre>
|
* protected void onResume() {
|
* super.onResume();
|
* if (!nfcAdapter.isEnabled()) {
|
* startActivity(new Intent(Settings.ACTION_NFC_SETTINGS));
|
* } else if (!nfcAdapter.isNdefPushEnabled()) {
|
* startActivity(new Intent(Settings.ACTION_NFCSHARING_SETTINGS));
|
* }
|
* }</pre>
|
*
|
* @see android.provider.Settings#ACTION_NFCSHARING_SETTINGS
|
* @return true if NDEF Push feature is enabled
|
* @throws UnsupportedOperationException if FEATURE_NFC is unavailable.
|
* @deprecated this feature is deprecated. File sharing can work using other technology like
|
* Bluetooth.
|
*/
|
@java.lang.Deprecated
|
|
public boolean isNdefPushEnabled() {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
if (!sHasBeamFeature) {
|
return false;
|
}
|
}
|
try {
|
return sService.isNdefPushEnabled();
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* Signals that you are no longer interested in communicating with an NFC tag
|
* for as long as it remains in range.
|
*
|
* All future attempted communication to this tag will fail with {@link IOException}.
|
* The NFC controller will be put in a low-power polling mode, allowing the device
|
* to save power in cases where it's "attached" to a tag all the time (e.g. a tag in
|
* car dock).
|
*
|
* Additionally the debounceMs parameter allows you to specify for how long the tag needs
|
* to have gone out of range, before it will be dispatched again.
|
*
|
* Note: the NFC controller typically polls at a pretty slow interval (100 - 500 ms).
|
* This means that if the tag repeatedly goes in and out of range (for example, in
|
* case of a flaky connection), and the controller happens to poll every time the
|
* tag is out of range, it *will* re-dispatch the tag after debounceMs, despite the tag
|
* having been "in range" during the interval.
|
*
|
* Note 2: if a tag with another UID is detected after this API is called, its effect
|
* will be cancelled; if this tag shows up before the amount of time specified in
|
* debounceMs, it will be dispatched again.
|
*
|
* Note 3: some tags have a random UID, in which case this API won't work reliably.
|
*
|
* @param tag the {@link android.nfc.Tag Tag} to ignore.
|
* @param debounceMs minimum amount of time the tag needs to be out of range before being
|
* dispatched again.
|
* @param tagRemovedListener listener to be called when the tag is removed from the field.
|
* Note that this will only be called if the tag has been out of range
|
* for at least debounceMs, or if another tag came into range before
|
* debounceMs. May be null in case you don't want a callback.
|
* @param handler the {@link android.os.Handler Handler} that will be used for delivering
|
* the callback. if the handler is null, then the thread used for delivering
|
* the callback is unspecified.
|
* @return false if the tag couldn't be found (or has already gone out of range), true otherwise
|
*/
|
public boolean ignore(final Tag tag, int debounceMs,
|
final OnTagRemovedListener tagRemovedListener, final Handler handler) {
|
ITagRemovedCallback.Stub iListener = null;
|
if (tagRemovedListener != null) {
|
iListener = new ITagRemovedCallback.Stub() {
|
@Override
|
public void onTagRemoved() throws RemoteException {
|
if (handler != null) {
|
handler.post(new Runnable() {
|
@Override
|
public void run() {
|
tagRemovedListener.onTagRemoved();
|
}
|
});
|
} else {
|
tagRemovedListener.onTagRemoved();
|
}
|
synchronized (mLock) {
|
mTagRemovedListener = null;
|
}
|
}
|
};
|
}
|
synchronized (mLock) {
|
mTagRemovedListener = iListener;
|
}
|
try {
|
return sService.ignore(tag.getServiceHandle(), debounceMs, iListener);
|
} catch (RemoteException e) {
|
return false;
|
}
|
}
|
|
/**
|
* Inject a mock NFC tag.<p>
|
* Used for testing purposes.
|
* <p class="note">Requires the
|
* {@link android.Manifest.permission#WRITE_SECURE_SETTINGS} permission.
|
* @hide
|
*/
|
public void dispatch(Tag tag) {
|
if (tag == null) {
|
throw new NullPointerException("tag cannot be null");
|
}
|
try {
|
sService.dispatch(tag);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
}
|
}
|
|
/**
|
* @hide
|
*/
|
public void setP2pModes(int initiatorModes, int targetModes) {
|
try {
|
sService.setP2pModes(initiatorModes, targetModes);
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
}
|
}
|
|
/**
|
* Registers a new NFC unlock handler with the NFC service.
|
*
|
* <p />NFC unlock handlers are intended to unlock the keyguard in the presence of a trusted
|
* NFC device. The handler should return true if it successfully authenticates the user and
|
* unlocks the keyguard.
|
*
|
* <p /> The parameter {@code tagTechnologies} determines which Tag technologies will be polled for
|
* at the lockscreen. Polling for less tag technologies reduces latency, and so it is
|
* strongly recommended to only provide the Tag technologies that the handler is expected to
|
* receive. There must be at least one tag technology provided, otherwise the unlock handler
|
* is ignored.
|
*
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean addNfcUnlockHandler(final NfcUnlockHandler unlockHandler,
|
String[] tagTechnologies) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
// If there are no tag technologies, don't bother adding unlock handler
|
if (tagTechnologies.length == 0) {
|
return false;
|
}
|
|
try {
|
synchronized (mLock) {
|
if (mNfcUnlockHandlers.containsKey(unlockHandler)) {
|
// update the tag technologies
|
sService.removeNfcUnlockHandler(mNfcUnlockHandlers.get(unlockHandler));
|
mNfcUnlockHandlers.remove(unlockHandler);
|
}
|
|
INfcUnlockHandler.Stub iHandler = new INfcUnlockHandler.Stub() {
|
@Override
|
public boolean onUnlockAttempted(Tag tag) throws RemoteException {
|
return unlockHandler.onUnlockAttempted(tag);
|
}
|
};
|
|
sService.addNfcUnlockHandler(iHandler,
|
Tag.getTechCodesFromStrings(tagTechnologies));
|
mNfcUnlockHandlers.put(unlockHandler, iHandler);
|
}
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
} catch (IllegalArgumentException e) {
|
Log.e(TAG, "Unable to register LockscreenDispatch", e);
|
return false;
|
}
|
|
return true;
|
}
|
|
/**
|
* Removes a previously registered unlock handler. Also removes the tag technologies
|
* associated with the removed unlock handler.
|
*
|
* @hide
|
*/
|
@SystemApi
|
@RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
|
public boolean removeNfcUnlockHandler(NfcUnlockHandler unlockHandler) {
|
synchronized (NfcAdapter.class) {
|
if (!sHasNfcFeature) {
|
throw new UnsupportedOperationException();
|
}
|
}
|
try {
|
synchronized (mLock) {
|
if (mNfcUnlockHandlers.containsKey(unlockHandler)) {
|
sService.removeNfcUnlockHandler(mNfcUnlockHandlers.remove(unlockHandler));
|
}
|
|
return true;
|
}
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return false;
|
}
|
}
|
|
/**
|
* @hide
|
*/
|
@UnsupportedAppUsage
|
public INfcAdapterExtras getNfcAdapterExtrasInterface() {
|
if (mContext == null) {
|
throw new UnsupportedOperationException("You need a context on NfcAdapter to use the "
|
+ " NFC extras APIs");
|
}
|
try {
|
return sService.getNfcAdapterExtrasInterface(mContext.getPackageName());
|
} catch (RemoteException e) {
|
attemptDeadServiceRecovery(e);
|
return null;
|
}
|
}
|
|
void enforceResumed(Activity activity) {
|
if (!activity.isResumed()) {
|
throw new IllegalStateException("API cannot be called while activity is paused");
|
}
|
}
|
|
int getSdkVersion() {
|
if (mContext == null) {
|
return android.os.Build.VERSION_CODES.GINGERBREAD; // best guess
|
} else {
|
return mContext.getApplicationInfo().targetSdkVersion;
|
}
|
}
|
}
|
