/*
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* Copyright (C) 2013 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 com.android.settings.accessibility;
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import static android.view.WindowManagerPolicyConstants.NAV_BAR_MODE_GESTURAL;
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import android.accessibilityservice.AccessibilityServiceInfo;
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import android.app.Activity;
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import android.app.Dialog;
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import android.app.admin.DevicePolicyManager;
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import android.app.settings.SettingsEnums;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.ResolveInfo;
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import android.content.pm.ServiceInfo;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.UserHandle;
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import android.os.storage.StorageManager;
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import android.provider.Settings;
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import android.text.TextUtils;
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import android.view.Menu;
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import android.view.MenuInflater;
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import android.view.View;
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import android.view.accessibility.AccessibilityManager;
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import com.android.internal.widget.LockPatternUtils;
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import com.android.settings.R;
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import com.android.settings.password.ConfirmDeviceCredentialActivity;
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import com.android.settings.widget.ToggleSwitch;
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import com.android.settings.widget.ToggleSwitch.OnBeforeCheckedChangeListener;
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import com.android.settingslib.accessibility.AccessibilityUtils;
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import java.util.List;
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public class ToggleAccessibilityServicePreferenceFragment
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extends ToggleFeaturePreferenceFragment implements View.OnClickListener {
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private static final int DIALOG_ID_ENABLE_WARNING = 1;
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private static final int DIALOG_ID_DISABLE_WARNING = 2;
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private static final int DIALOG_ID_LAUNCH_ACCESSIBILITY_TUTORIAL = 3;
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public static final int ACTIVITY_REQUEST_CONFIRM_CREDENTIAL_FOR_WEAKER_ENCRYPTION = 1;
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private LockPatternUtils mLockPatternUtils;
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private final SettingsContentObserver mSettingsContentObserver =
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new SettingsContentObserver(new Handler()) {
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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updateSwitchBarToggleSwitch();
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}
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};
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private ComponentName mComponentName;
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private Dialog mDialog;
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@Override
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public int getMetricsCategory() {
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return SettingsEnums.ACCESSIBILITY_SERVICE;
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}
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@Override
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public void onCreateOptionsMenu(Menu menu, MenuInflater infalter) {
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// Do not call super. We don't want to see the "Help & feedback" option on this page so as
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// not to confuse users who think they might be able to send feedback about a specific
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// accessibility service from this page.
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}
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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mLockPatternUtils = new LockPatternUtils(getActivity());
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}
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@Override
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public void onResume() {
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mSettingsContentObserver.register(getContentResolver());
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updateSwitchBarToggleSwitch();
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super.onResume();
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}
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@Override
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public void onPause() {
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mSettingsContentObserver.unregister(getContentResolver());
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super.onPause();
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}
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@Override
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public void onPreferenceToggled(String preferenceKey, boolean enabled) {
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ComponentName toggledService = ComponentName.unflattenFromString(preferenceKey);
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AccessibilityUtils.setAccessibilityServiceState(getActivity(), toggledService, enabled);
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}
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// IMPORTANT: Refresh the info since there are dynamically changing
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// capabilities. For
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// example, before JellyBean MR2 the user was granting the explore by touch
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// one.
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private AccessibilityServiceInfo getAccessibilityServiceInfo() {
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List<AccessibilityServiceInfo> serviceInfos = AccessibilityManager.getInstance(
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getActivity()).getInstalledAccessibilityServiceList();
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final int serviceInfoCount = serviceInfos.size();
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for (int i = 0; i < serviceInfoCount; i++) {
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AccessibilityServiceInfo serviceInfo = serviceInfos.get(i);
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ResolveInfo resolveInfo = serviceInfo.getResolveInfo();
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if (mComponentName.getPackageName().equals(resolveInfo.serviceInfo.packageName)
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&& mComponentName.getClassName().equals(resolveInfo.serviceInfo.name)) {
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return serviceInfo;
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}
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}
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return null;
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}
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@Override
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public Dialog onCreateDialog(int dialogId) {
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switch (dialogId) {
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case DIALOG_ID_ENABLE_WARNING: {
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final AccessibilityServiceInfo info = getAccessibilityServiceInfo();
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if (info == null) {
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return null;
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}
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mDialog = AccessibilityServiceWarning
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.createCapabilitiesDialog(getActivity(), info, this);
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break;
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}
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case DIALOG_ID_DISABLE_WARNING: {
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AccessibilityServiceInfo info = getAccessibilityServiceInfo();
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if (info == null) {
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return null;
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}
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mDialog = AccessibilityServiceWarning
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.createDisableDialog(getActivity(), info, this);
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break;
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}
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case DIALOG_ID_LAUNCH_ACCESSIBILITY_TUTORIAL: {
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if (isGestureNavigateEnabled()) {
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mDialog = AccessibilityGestureNavigationTutorial
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.showGestureNavigationTutorialDialog(getActivity());
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} else {
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mDialog = AccessibilityGestureNavigationTutorial
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.showAccessibilityButtonTutorialDialog(getActivity());
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}
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break;
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}
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default: {
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throw new IllegalArgumentException();
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}
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}
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return mDialog;
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}
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@Override
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public int getDialogMetricsCategory(int dialogId) {
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if (dialogId == DIALOG_ID_ENABLE_WARNING) {
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return SettingsEnums.DIALOG_ACCESSIBILITY_SERVICE_ENABLE;
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} else {
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return SettingsEnums.DIALOG_ACCESSIBILITY_SERVICE_DISABLE;
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}
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}
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private void updateSwitchBarToggleSwitch() {
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final boolean checked = AccessibilityUtils.getEnabledServicesFromSettings(getActivity())
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.contains(mComponentName);
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mSwitchBar.setCheckedInternal(checked);
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}
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/**
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* Return whether the device is encrypted with legacy full disk encryption. Newer devices
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* should be using File Based Encryption.
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*
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* @return true if device is encrypted
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*/
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private boolean isFullDiskEncrypted() {
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return StorageManager.isNonDefaultBlockEncrypted();
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}
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@Override
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == ACTIVITY_REQUEST_CONFIRM_CREDENTIAL_FOR_WEAKER_ENCRYPTION) {
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if (resultCode == Activity.RESULT_OK) {
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handleConfirmServiceEnabled(true);
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// The user confirmed that they accept weaker encryption when
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// enabling the accessibility service, so change encryption.
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// Since we came here asynchronously, check encryption again.
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if (isFullDiskEncrypted()) {
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mLockPatternUtils.clearEncryptionPassword();
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Settings.Global.putInt(getContentResolver(),
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Settings.Global.REQUIRE_PASSWORD_TO_DECRYPT, 0);
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}
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} else {
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handleConfirmServiceEnabled(false);
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}
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}
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}
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@Override
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public void onClick(View view) {
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if (view.getId() == R.id.permission_enable_allow_button) {
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if (isFullDiskEncrypted()) {
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String title = createConfirmCredentialReasonMessage();
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Intent intent = ConfirmDeviceCredentialActivity.createIntent(title, null);
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startActivityForResult(intent,
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ACTIVITY_REQUEST_CONFIRM_CREDENTIAL_FOR_WEAKER_ENCRYPTION);
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} else {
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handleConfirmServiceEnabled(true);
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if (isServiceSupportAccessibilityButton()) {
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showDialog(DIALOG_ID_LAUNCH_ACCESSIBILITY_TUTORIAL);
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}
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}
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} else if (view.getId() == R.id.permission_enable_deny_button) {
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handleConfirmServiceEnabled(false);
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} else if (view.getId() == R.id.permission_disable_stop_button) {
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handleConfirmServiceEnabled(false);
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} else if (view.getId() == R.id.permission_disable_cancel_button) {
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handleConfirmServiceEnabled(true);
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} else {
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throw new IllegalArgumentException();
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}
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mDialog.dismiss();
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}
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private boolean isGestureNavigateEnabled() {
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return getContext().getResources().getInteger(
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com.android.internal.R.integer.config_navBarInteractionMode)
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== NAV_BAR_MODE_GESTURAL;
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}
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private boolean isServiceSupportAccessibilityButton() {
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final AccessibilityManager ams = (AccessibilityManager) getContext().getSystemService(
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Context.ACCESSIBILITY_SERVICE);
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final List<AccessibilityServiceInfo> services = ams.getInstalledAccessibilityServiceList();
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for (AccessibilityServiceInfo info : services) {
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if ((info.flags & AccessibilityServiceInfo.FLAG_REQUEST_ACCESSIBILITY_BUTTON) != 0) {
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ServiceInfo serviceInfo = info.getResolveInfo().serviceInfo;
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if (serviceInfo != null && TextUtils.equals(serviceInfo.name,
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getAccessibilityServiceInfo().getResolveInfo().serviceInfo.name)) {
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return true;
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}
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}
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}
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return false;
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}
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private void handleConfirmServiceEnabled(boolean confirmed) {
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mSwitchBar.setCheckedInternal(confirmed);
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getArguments().putBoolean(AccessibilitySettings.EXTRA_CHECKED, confirmed);
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onPreferenceToggled(mPreferenceKey, confirmed);
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}
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private String createConfirmCredentialReasonMessage() {
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int resId = R.string.enable_service_password_reason;
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switch (mLockPatternUtils.getKeyguardStoredPasswordQuality(UserHandle.myUserId())) {
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case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING: {
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resId = R.string.enable_service_pattern_reason;
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}
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break;
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case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
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case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX: {
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resId = R.string.enable_service_pin_reason;
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}
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break;
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}
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return getString(resId, getAccessibilityServiceInfo().getResolveInfo()
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.loadLabel(getPackageManager()));
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}
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@Override
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protected void onInstallSwitchBarToggleSwitch() {
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super.onInstallSwitchBarToggleSwitch();
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mToggleSwitch.setOnBeforeCheckedChangeListener(new OnBeforeCheckedChangeListener() {
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@Override
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public boolean onBeforeCheckedChanged(ToggleSwitch toggleSwitch, boolean checked) {
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if (checked) {
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mSwitchBar.setCheckedInternal(false);
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getArguments().putBoolean(AccessibilitySettings.EXTRA_CHECKED, false);
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showDialog(DIALOG_ID_ENABLE_WARNING);
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} else {
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mSwitchBar.setCheckedInternal(true);
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getArguments().putBoolean(AccessibilitySettings.EXTRA_CHECKED, true);
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showDialog(DIALOG_ID_DISABLE_WARNING);
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}
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return true;
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}
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});
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}
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@Override
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protected void onProcessArguments(Bundle arguments) {
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super.onProcessArguments(arguments);
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// Settings title and intent.
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String settingsTitle = arguments.getString(AccessibilitySettings.EXTRA_SETTINGS_TITLE);
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String settingsComponentName = arguments.getString(
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AccessibilitySettings.EXTRA_SETTINGS_COMPONENT_NAME);
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if (!TextUtils.isEmpty(settingsTitle) && !TextUtils.isEmpty(settingsComponentName)) {
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Intent settingsIntent = new Intent(Intent.ACTION_MAIN).setComponent(
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ComponentName.unflattenFromString(settingsComponentName.toString()));
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if (!getPackageManager().queryIntentActivities(settingsIntent, 0).isEmpty()) {
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mSettingsTitle = settingsTitle;
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mSettingsIntent = settingsIntent;
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setHasOptionsMenu(true);
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}
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}
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mComponentName = arguments.getParcelable(AccessibilitySettings.EXTRA_COMPONENT_NAME);
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}
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}
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