/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.bluetooth;
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import android.annotation.SdkConstant;
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import android.annotation.SdkConstant.SdkConstantType;
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import android.annotation.UnsupportedAppUsage;
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import android.content.Context;
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import android.os.Binder;
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import android.os.IBinder;
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import android.os.RemoteException;
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import android.util.Log;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* This class provides the APIs to control the Bluetooth Pan
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* Profile.
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*
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* <p>BluetoothPan is a proxy object for controlling the Bluetooth
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* Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
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* the BluetoothPan proxy object.
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*
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* <p>Each method is protected with its appropriate permission.
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*
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* @hide
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*/
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public final class BluetoothPan implements BluetoothProfile {
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private static final String TAG = "BluetoothPan";
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private static final boolean DBG = true;
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private static final boolean VDBG = false;
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/**
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* Intent used to broadcast the change in connection state of the Pan
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* profile.
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*
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* <p>This intent will have 4 extras:
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* <ul>
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* <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
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* <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li>
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* <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
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* <li> {@link #EXTRA_LOCAL_ROLE} - Which local role the remote device is
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* bound to. </li>
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* </ul>
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*
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* <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
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* {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING},
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* {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}.
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*
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* <p> {@link #EXTRA_LOCAL_ROLE} can be one of {@link #LOCAL_NAP_ROLE} or
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* {@link #LOCAL_PANU_ROLE}
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
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* receive.
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*/
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@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
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public static final String ACTION_CONNECTION_STATE_CHANGED =
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"android.bluetooth.pan.profile.action.CONNECTION_STATE_CHANGED";
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/**
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* Extra for {@link #ACTION_CONNECTION_STATE_CHANGED} intent
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* The local role of the PAN profile that the remote device is bound to.
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* It can be one of {@link #LOCAL_NAP_ROLE} or {@link #LOCAL_PANU_ROLE}.
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*/
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public static final String EXTRA_LOCAL_ROLE = "android.bluetooth.pan.extra.LOCAL_ROLE";
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public static final int PAN_ROLE_NONE = 0;
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/**
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* The local device is acting as a Network Access Point.
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*/
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public static final int LOCAL_NAP_ROLE = 1;
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public static final int REMOTE_NAP_ROLE = 1;
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/**
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* The local device is acting as a PAN User.
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*/
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public static final int LOCAL_PANU_ROLE = 2;
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public static final int REMOTE_PANU_ROLE = 2;
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/**
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* Return codes for the connect and disconnect Bluez / Dbus calls.
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*
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* @hide
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*/
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public static final int PAN_DISCONNECT_FAILED_NOT_CONNECTED = 1000;
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/**
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* @hide
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*/
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public static final int PAN_CONNECT_FAILED_ALREADY_CONNECTED = 1001;
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/**
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* @hide
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*/
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public static final int PAN_CONNECT_FAILED_ATTEMPT_FAILED = 1002;
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/**
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* @hide
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*/
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public static final int PAN_OPERATION_GENERIC_FAILURE = 1003;
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/**
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* @hide
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*/
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public static final int PAN_OPERATION_SUCCESS = 1004;
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private final Context mContext;
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private BluetoothAdapter mAdapter;
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private final BluetoothProfileConnector<IBluetoothPan> mProfileConnector =
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new BluetoothProfileConnector(this, BluetoothProfile.PAN,
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"BluetoothPan", IBluetoothPan.class.getName()) {
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@Override
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public IBluetoothPan getServiceInterface(IBinder service) {
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return IBluetoothPan.Stub.asInterface(Binder.allowBlocking(service));
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}
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};
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/**
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* Create a BluetoothPan proxy object for interacting with the local
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* Bluetooth Service which handles the Pan profile
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*/
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@UnsupportedAppUsage
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/*package*/ BluetoothPan(Context context, ServiceListener listener) {
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mAdapter = BluetoothAdapter.getDefaultAdapter();
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mContext = context;
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mProfileConnector.connect(context, listener);
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}
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@UnsupportedAppUsage
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/*package*/ void close() {
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if (VDBG) log("close()");
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mProfileConnector.disconnect();
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}
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private IBluetoothPan getService() {
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return mProfileConnector.getService();
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}
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protected void finalize() {
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close();
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}
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/**
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* Initiate connection to a profile of the remote bluetooth device.
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*
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* <p> This API returns false in scenarios like the profile on the
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* device is already connected or Bluetooth is not turned on.
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* When this API returns true, it is guaranteed that
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* connection state intent for the profile will be broadcasted with
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* the state. Users can get the connection state of the profile
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* from this intent.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
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* permission.
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*
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* @param device Remote Bluetooth Device
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* @return false on immediate error, true otherwise
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* @hide
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*/
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@UnsupportedAppUsage
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public boolean connect(BluetoothDevice device) {
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if (DBG) log("connect(" + device + ")");
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final IBluetoothPan service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.connect(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return false;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return false;
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}
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/**
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* Initiate disconnection from a profile
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*
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* <p> This API will return false in scenarios like the profile on the
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* Bluetooth device is not in connected state etc. When this API returns,
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* true, it is guaranteed that the connection state change
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* intent will be broadcasted with the state. Users can get the
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* disconnection state of the profile from this intent.
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*
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* <p> If the disconnection is initiated by a remote device, the state
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* will transition from {@link #STATE_CONNECTED} to
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* {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the
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* host (local) device the state will transition from
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* {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to
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* state {@link #STATE_DISCONNECTED}. The transition to
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* {@link #STATE_DISCONNECTING} can be used to distinguish between the
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* two scenarios.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
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* permission.
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*
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* @param device Remote Bluetooth Device
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* @return false on immediate error, true otherwise
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* @hide
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*/
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@UnsupportedAppUsage
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public boolean disconnect(BluetoothDevice device) {
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if (DBG) log("disconnect(" + device + ")");
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final IBluetoothPan service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.disconnect(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return false;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public List<BluetoothDevice> getConnectedDevices() {
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if (VDBG) log("getConnectedDevices()");
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final IBluetoothPan service = getService();
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if (service != null && isEnabled()) {
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try {
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return service.getConnectedDevices();
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return new ArrayList<BluetoothDevice>();
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return new ArrayList<BluetoothDevice>();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
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if (VDBG) log("getDevicesMatchingStates()");
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final IBluetoothPan service = getService();
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if (service != null && isEnabled()) {
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try {
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return service.getDevicesMatchingConnectionStates(states);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return new ArrayList<BluetoothDevice>();
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return new ArrayList<BluetoothDevice>();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public int getConnectionState(BluetoothDevice device) {
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if (VDBG) log("getState(" + device + ")");
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final IBluetoothPan service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.getConnectionState(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return BluetoothProfile.STATE_DISCONNECTED;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return BluetoothProfile.STATE_DISCONNECTED;
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}
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@UnsupportedAppUsage
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public void setBluetoothTethering(boolean value) {
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String pkgName = mContext.getOpPackageName();
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if (DBG) log("setBluetoothTethering(" + value + "), calling package:" + pkgName);
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final IBluetoothPan service = getService();
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if (service != null && isEnabled()) {
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try {
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service.setBluetoothTethering(value, pkgName);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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}
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}
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}
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@UnsupportedAppUsage
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public boolean isTetheringOn() {
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if (VDBG) log("isTetheringOn()");
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final IBluetoothPan service = getService();
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if (service != null && isEnabled()) {
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try {
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return service.isTetheringOn();
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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}
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}
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return false;
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}
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@UnsupportedAppUsage
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private boolean isEnabled() {
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return mAdapter.getState() == BluetoothAdapter.STATE_ON;
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}
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@UnsupportedAppUsage
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private static boolean isValidDevice(BluetoothDevice device) {
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return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress());
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}
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@UnsupportedAppUsage
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private static void log(String msg) {
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Log.d(TAG, msg);
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}
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}
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