/*
* Copyright (C) 2009 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 com.android.settings;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.app.ActionBar;
import android.app.Activity;
import android.app.ActivityManagerNative;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.content.res.Configuration;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemProperties;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceCategory;
import android.preference.PreferenceScreen;
import android.provider.Settings;
import android.text.TextUtils;
import android.text.TextUtils.SimpleStringSplitter;
import android.util.Log;
import android.view.Gravity;
import android.view.IWindowManager;
import android.view.KeyCharacterMap;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Surface;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityManager;
import android.widget.LinearLayout;
import android.widget.Switch;
import android.widget.TextView;
import com.android.internal.content.PackageMonitor;
import com.android.settings.AccessibilitySettings.ToggleSwitch.OnBeforeCheckedChangeListener;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Activity with the accessibility settings.
*/
public class AccessibilitySettings extends SettingsPreferenceFragment implements DialogCreatable,
Preference.OnPreferenceChangeListener {
private static final String TAG = "AccessibilitySettings";
private static final String DEFAULT_SCREENREADER_MARKET_LINK =
"market://search?q=pname:com.google.android.marvin.talkback";
private static final float LARGE_FONT_SCALE = 1.3f;
private static final String SYSTEM_PROPERTY_MARKET_URL = "ro.screenreader.market";
// Timeout before we update the services if packages are added/removed since
// the AccessibilityManagerService has to do that processing first to generate
// the AccessibilityServiceInfo we need for proper presentation.
private static final long DELAY_UPDATE_SERVICES_MILLIS = 1000;
private static final char ENABLED_ACCESSIBILITY_SERVICES_SEPARATOR = ':';
private static final String KEY_ACCESSIBILITY_TUTORIAL_LAUNCHED_ONCE =
"key_accessibility_tutorial_launched_once";
private static final String KEY_INSTALL_ACCESSIBILITY_SERVICE_OFFERED_ONCE =
"key_install_accessibility_service_offered_once";
// Preference categories
private static final String SERVICES_CATEGORY = "services_category";
private static final String SYSTEM_CATEGORY = "system_category";
// Preferences
private static final String TOGGLE_LARGE_TEXT_PREFERENCE = "toggle_large_text_preference";
private static final String TOGGLE_POWER_BUTTON_ENDS_CALL_PREFERENCE =
"toggle_power_button_ends_call_preference";
private static final String TOGGLE_AUTO_ROTATE_SCREEN_PREFERENCE =
"toggle_auto_rotate_screen_preference";
private static final String TOGGLE_SPEAK_PASSWORD_PREFERENCE =
"toggle_speak_password_preference";
private static final String TOGGLE_TOUCH_EXPLORATION_PREFERENCE =
"toggle_touch_exploration_preference";
private static final String SELECT_LONG_PRESS_TIMEOUT_PREFERENCE =
"select_long_press_timeout_preference";
private static final String TOGGLE_SCRIPT_INJECTION_PREFERENCE =
"toggle_script_injection_preference";
// Extras passed to sub-fragments.
private static final String EXTRA_PREFERENCE_KEY = "preference_key";
private static final String EXTRA_CHECKED = "checked";
private static final String EXTRA_TITLE = "title";
private static final String EXTRA_SUMMARY = "summary";
private static final String EXTRA_ENABLE_WARNING_TITLE = "enable_warning_title";
private static final String EXTRA_ENABLE_WARNING_MESSAGE = "enable_warning_message";
private static final String EXTRA_DISABLE_WARNING_TITLE = "disable_warning_title";
private static final String EXTRA_DISABLE_WARNING_MESSAGE = "disable_warning_message";
private static final String EXTRA_SETTINGS_TITLE = "settings_title";
private static final String EXTRA_SETTINGS_COMPONENT_NAME = "settings_component_name";
// Dialog IDs.
private static final int DIALOG_ID_NO_ACCESSIBILITY_SERVICES = 1;
// Auxiliary members.
private final static SimpleStringSplitter sStringColonSplitter =
new SimpleStringSplitter(ENABLED_ACCESSIBILITY_SERVICES_SEPARATOR);
private static final Set<ComponentName> sInstalledServices = new HashSet<ComponentName>();
private final Map<String, String> mLongPressTimeoutValuetoTitleMap =
new HashMap<String, String>();
private final Configuration mCurConfig = new Configuration();
private final PackageMonitor mSettingsPackageMonitor = new SettingsPackageMonitor();
private final Handler mHandler = new Handler() {
@Override
public void dispatchMessage(Message msg) {
super.dispatchMessage(msg);
loadInstalledServices();
updateServicesPreferences();
}
};
// Preference controls.
private PreferenceCategory mServicesCategory;
private PreferenceCategory mSystemsCategory;
private CheckBoxPreference mToggleLargeTextPreference;
private CheckBoxPreference mTogglePowerButtonEndsCallPreference;
private CheckBoxPreference mToggleAutoRotateScreenPreference;
private CheckBoxPreference mToggleSpeakPasswordPreference;
private Preference mToggleTouchExplorationPreference;
private ListPreference mSelectLongPressTimeoutPreference;
private AccessibilityEnableScriptInjectionPreference mToggleScriptInjectionPreference;
private Preference mNoServicesMessagePreference;
private int mLongPressTimeoutDefault;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
addPreferencesFromResource(R.xml.accessibility_settings);
initializeAllPreferences();
}
@Override
public void onResume() {
super.onResume();
loadInstalledServices();
updateAllPreferences();
if (mServicesCategory.getPreference(0) == mNoServicesMessagePreference) {
offerInstallAccessibilitySerivceOnce();
}
mSettingsPackageMonitor.register(getActivity(), false);
}
@Override
public void onPause() {
mSettingsPackageMonitor.unregister();
super.onPause();
}
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (preference == mSelectLongPressTimeoutPreference) {
String stringValue = (String) newValue;
Settings.Secure.putInt(getContentResolver(),
Settings.Secure.LONG_PRESS_TIMEOUT, Integer.parseInt(stringValue));
mSelectLongPressTimeoutPreference.setSummary(
mLongPressTimeoutValuetoTitleMap.get(stringValue));
return true;
}
return false;
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
if (mToggleLargeTextPreference == preference) {
handleToggleLargeTextPreferenceClick();
return true;
} else if (mTogglePowerButtonEndsCallPreference == preference) {
handleTogglePowerButtonEndsCallPreferenceClick();
return true;
} else if (mToggleAutoRotateScreenPreference == preference) {
handleToggleAutoRotateScreenPreferenceClick();
return true;
} else if (mToggleSpeakPasswordPreference == preference) {
handleToggleSpeakPasswordPreferenceClick();
}
return super.onPreferenceTreeClick(preferenceScreen, preference);
}
private void handleToggleLargeTextPreferenceClick() {
try {
mCurConfig.fontScale = mToggleLargeTextPreference.isChecked() ? LARGE_FONT_SCALE : 1;
ActivityManagerNative.getDefault().updatePersistentConfiguration(mCurConfig);
} catch (RemoteException re) {
/* ignore */
}
}
private void handleTogglePowerButtonEndsCallPreferenceClick() {
Settings.Secure.putInt(getContentResolver(),
Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR,
(mTogglePowerButtonEndsCallPreference.isChecked()
? Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_HANGUP
: Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_SCREEN_OFF));
}
private void handleToggleAutoRotateScreenPreferenceClick() {
try {
IWindowManager wm = IWindowManager.Stub.asInterface(
ServiceManager.getService(Context.WINDOW_SERVICE));
if (mToggleAutoRotateScreenPreference.isChecked()) {
wm.thawRotation();
} else {
wm.freezeRotation(Surface.ROTATION_0);
}
} catch (RemoteException exc) {
Log.w(TAG, "Unable to save auto-rotate setting");
}
}
private void handleToggleSpeakPasswordPreferenceClick() {
Settings.Secure.putInt(getContentResolver(),
Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD,
mToggleSpeakPasswordPreference.isChecked() ? 1 : 0);
}
private void initializeAllPreferences() {
mServicesCategory = (PreferenceCategory) findPreference(SERVICES_CATEGORY);
mSystemsCategory = (PreferenceCategory) findPreference(SYSTEM_CATEGORY);
// Large text.
mToggleLargeTextPreference =
(CheckBoxPreference) findPreference(TOGGLE_LARGE_TEXT_PREFERENCE);
// Power button ends calls.
mTogglePowerButtonEndsCallPreference =
(CheckBoxPreference) findPreference(TOGGLE_POWER_BUTTON_ENDS_CALL_PREFERENCE);
if (!KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_POWER)
|| !Utils.isVoiceCapable(getActivity())) {
mSystemsCategory.removePreference(mTogglePowerButtonEndsCallPreference);
}
// Auto-rotate screen
mToggleAutoRotateScreenPreference =
(CheckBoxPreference) findPreference(TOGGLE_AUTO_ROTATE_SCREEN_PREFERENCE);
// Speak passwords.
mToggleSpeakPasswordPreference =
(CheckBoxPreference) findPreference(TOGGLE_SPEAK_PASSWORD_PREFERENCE);
// Touch exploration enabled.
mToggleTouchExplorationPreference = findPreference(TOGGLE_TOUCH_EXPLORATION_PREFERENCE);
// Long press timeout.
mSelectLongPressTimeoutPreference =
(ListPreference) findPreference(SELECT_LONG_PRESS_TIMEOUT_PREFERENCE);
mSelectLongPressTimeoutPreference.setOnPreferenceChangeListener(this);
if (mLongPressTimeoutValuetoTitleMap.size() == 0) {
String[] timeoutValues = getResources().getStringArray(
R.array.long_press_timeout_selector_values);
mLongPressTimeoutDefault = Integer.parseInt(timeoutValues[0]);
String[] timeoutTitles = getResources().getStringArray(
R.array.long_press_timeout_selector_titles);
final int timeoutValueCount = timeoutValues.length;
for (int i = 0; i < timeoutValueCount; i++) {
mLongPressTimeoutValuetoTitleMap.put(timeoutValues[i], timeoutTitles[i]);
}
}
// Script injection.
mToggleScriptInjectionPreference = (AccessibilityEnableScriptInjectionPreference)
findPreference(TOGGLE_SCRIPT_INJECTION_PREFERENCE);
}
private void updateAllPreferences() {
updateServicesPreferences();
updateSystemPreferences();
}
private void updateServicesPreferences() {
// Since services category is auto generated we have to do a pass
// to generate it since services can come and go and then based on
// the global accessibility state to decided whether it is enabled.
// Generate.
mServicesCategory.removeAll();
AccessibilityManager accessibilityManager = AccessibilityManager.getInstance(getActivity());
List<AccessibilityServiceInfo> installedServices =
accessibilityManager.getInstalledAccessibilityServiceList();
Set<ComponentName> enabledServices = getEnabledServicesFromSettings(getActivity());
final boolean accessibilityEnabled = Settings.Secure.getInt(getContentResolver(),
Settings.Secure.ACCESSIBILITY_ENABLED, 0) == 1;
for (int i = 0, count = installedServices.size(); i < count; ++i) {
AccessibilityServiceInfo info = installedServices.get(i);
PreferenceScreen preference = getPreferenceManager().createPreferenceScreen(
getActivity());
String title = info.getResolveInfo().loadLabel(getPackageManager()).toString();
ServiceInfo serviceInfo = info.getResolveInfo().serviceInfo;
ComponentName componentName = new ComponentName(serviceInfo.packageName,
serviceInfo.name);
preference.setKey(componentName.flattenToString());
preference.setTitle(title);
final boolean serviceEnabled = accessibilityEnabled
&& enabledServices.contains(componentName);
if (serviceEnabled) {
preference.setSummary(getString(R.string.accessibility_service_state_on));
} else {
preference.setSummary(getString(R.string.accessibility_service_state_off));
}
preference.setOrder(i);
preference.setFragment(ToggleAccessibilityServiceFragment.class.getName());
preference.setPersistent(true);
Bundle extras = preference.getExtras();
extras.putString(EXTRA_PREFERENCE_KEY, preference.getKey());
extras.putBoolean(EXTRA_CHECKED, serviceEnabled);
extras.putString(EXTRA_TITLE, title);
String description = info.getDescription();
if (TextUtils.isEmpty(description)) {
description = getString(R.string.accessibility_service_default_description);
}
extras.putString(EXTRA_SUMMARY, description);
CharSequence applicationLabel = info.getResolveInfo().loadLabel(getPackageManager());
extras.putString(EXTRA_ENABLE_WARNING_TITLE, getString(
R.string.accessibility_service_security_warning_title, applicationLabel));
extras.putString(EXTRA_ENABLE_WARNING_MESSAGE, getString(
R.string.accessibility_service_security_warning_summary, applicationLabel));
extras.putString(EXTRA_DISABLE_WARNING_TITLE, getString(
R.string.accessibility_service_disable_warning_title,
applicationLabel));
extras.putString(EXTRA_DISABLE_WARNING_MESSAGE, getString(
R.string.accessibility_service_disable_warning_summary,
applicationLabel));
String settingsClassName = info.getSettingsActivityName();
if (!TextUtils.isEmpty(settingsClassName)) {
extras.putString(EXTRA_SETTINGS_TITLE,
getString(R.string.accessibility_menu_item_settings));
extras.putString(EXTRA_SETTINGS_COMPONENT_NAME,
new ComponentName(info.getResolveInfo().serviceInfo.packageName,
settingsClassName).flattenToString());
}
mServicesCategory.addPreference(preference);
}
if (mServicesCategory.getPreferenceCount() == 0) {
if (mNoServicesMessagePreference == null) {
mNoServicesMessagePreference = new Preference(getActivity()) {
@Override
protected void onBindView(View view) {
super.onBindView(view);
LinearLayout containerView =
(LinearLayout) view.findViewById(R.id.message_container);
containerView.setGravity(Gravity.CENTER);
TextView summaryView = (TextView) view.findViewById(R.id.summary);
String title = getString(R.string.accessibility_no_services_installed);
summaryView.setText(title);
}
};
mNoServicesMessagePreference.setPersistent(false);
mNoServicesMessagePreference.setLayoutResource(
R.layout.text_description_preference);
mNoServicesMessagePreference.setSelectable(false);
}
mServicesCategory.addPreference(mNoServicesMessagePreference);
}
}
private void updateSystemPreferences() {
// Large text.
try {
mCurConfig.updateFrom(ActivityManagerNative.getDefault().getConfiguration());
} catch (RemoteException re) {
/* ignore */
}
mToggleLargeTextPreference.setChecked(mCurConfig.fontScale == LARGE_FONT_SCALE);
// Power button ends calls.
if (KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_POWER)
&& Utils.isVoiceCapable(getActivity())) {
final int incallPowerBehavior = Settings.Secure.getInt(getContentResolver(),
Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR,
Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_DEFAULT);
final boolean powerButtonEndsCall =
(incallPowerBehavior == Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_HANGUP);
mTogglePowerButtonEndsCallPreference.setChecked(powerButtonEndsCall);
}
// Auto-rotate screen
final boolean autoRotationEnabled = Settings.System.getInt(getContentResolver(),
Settings.System.ACCELEROMETER_ROTATION, 0) != 0;
mToggleAutoRotateScreenPreference.setChecked(autoRotationEnabled);
// Speak passwords.
final boolean speakPasswordEnabled = Settings.Secure.getInt(getContentResolver(),
Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD, 0) != 0;
mToggleSpeakPasswordPreference.setChecked(speakPasswordEnabled);
// Touch exploration enabled.
if (AccessibilityManager.getInstance(getActivity()).isEnabled()) {
mSystemsCategory.addPreference(mToggleTouchExplorationPreference);
final boolean touchExplorationEnabled = (Settings.Secure.getInt(getContentResolver(),
Settings.Secure.TOUCH_EXPLORATION_ENABLED, 0) == 1);
if (touchExplorationEnabled) {
mToggleTouchExplorationPreference.setSummary(
getString(R.string.accessibility_service_state_on));
mToggleTouchExplorationPreference.getExtras().putBoolean(EXTRA_CHECKED, true);
} else {
mToggleTouchExplorationPreference.setSummary(
getString(R.string.accessibility_service_state_off));
mToggleTouchExplorationPreference.getExtras().putBoolean(EXTRA_CHECKED, false);
}
} else {
mSystemsCategory.removePreference(mToggleTouchExplorationPreference);
}
// Long press timeout.
final int longPressTimeout = Settings.Secure.getInt(getContentResolver(),
Settings.Secure.LONG_PRESS_TIMEOUT, mLongPressTimeoutDefault);
String value = String.valueOf(longPressTimeout);
mSelectLongPressTimeoutPreference.setValue(value);
mSelectLongPressTimeoutPreference.setSummary(mLongPressTimeoutValuetoTitleMap.get(value));
// Script injection.
final boolean scriptInjectionAllowed = (Settings.Secure.getInt(getContentResolver(),
Settings.Secure.ACCESSIBILITY_SCRIPT_INJECTION, 0) == 1);
mToggleScriptInjectionPreference.setInjectionAllowed(scriptInjectionAllowed);
}
private void offerInstallAccessibilitySerivceOnce() {
// There is always one preference - if no services it is just a message.
if (mServicesCategory.getPreference(0) != mNoServicesMessagePreference) {
return;
}
SharedPreferences preferences = getActivity().getPreferences(Context.MODE_PRIVATE);
final boolean offerInstallService = !preferences.getBoolean(
KEY_INSTALL_ACCESSIBILITY_SERVICE_OFFERED_ONCE, false);
if (offerInstallService) {
preferences.edit().putBoolean(KEY_INSTALL_ACCESSIBILITY_SERVICE_OFFERED_ONCE,
true).commit();
// Notify user that they do not have any accessibility
// services installed and direct them to Market to get TalkBack.
showDialog(DIALOG_ID_NO_ACCESSIBILITY_SERVICES);
}
}
@Override
public Dialog onCreateDialog(int dialogId) {
switch (dialogId) {
case DIALOG_ID_NO_ACCESSIBILITY_SERVICES:
return new AlertDialog.Builder(getActivity())
.setTitle(R.string.accessibility_service_no_apps_title)
.setMessage(R.string.accessibility_service_no_apps_message)
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// dismiss the dialog before launching the activity otherwise
// the dialog removal occurs after onSaveInstanceState which
// triggers an exception
removeDialog(DIALOG_ID_NO_ACCESSIBILITY_SERVICES);
String screenreaderMarketLink = SystemProperties.get(
SYSTEM_PROPERTY_MARKET_URL,
DEFAULT_SCREENREADER_MARKET_LINK);
Uri marketUri = Uri.parse(screenreaderMarketLink);
Intent marketIntent = new Intent(Intent.ACTION_VIEW, marketUri);
startActivity(marketIntent);
}
})
.setNegativeButton(android.R.string.cancel, null)
.create();
default:
return null;
}
}
private void loadInstalledServices() {
List<AccessibilityServiceInfo> installedServiceInfos =
AccessibilityManager.getInstance(getActivity())
.getInstalledAccessibilityServiceList();
Set<ComponentName> installedServices = sInstalledServices;
installedServices.clear();
final int installedServiceInfoCount = installedServiceInfos.size();
for (int i = 0; i < installedServiceInfoCount; i++) {
ResolveInfo resolveInfo = installedServiceInfos.get(i).getResolveInfo();
ComponentName installedService = new ComponentName(
resolveInfo.serviceInfo.packageName,
resolveInfo.serviceInfo.name);
installedServices.add(installedService);
}
}
private static Set<ComponentName> getEnabledServicesFromSettings(Context context) {
String enabledServicesSetting = Settings.Secure.getString(context.getContentResolver(),
Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
if (enabledServicesSetting == null) {
enabledServicesSetting = "";
}
Set<ComponentName> enabledServices = new HashSet<ComponentName>();
SimpleStringSplitter colonSplitter = sStringColonSplitter;
colonSplitter.setString(enabledServicesSetting);
while (colonSplitter.hasNext()) {
String componentNameString = colonSplitter.next();
ComponentName enabledService = ComponentName.unflattenFromString(
componentNameString);
if (enabledService != null) {
enabledServices.add(enabledService);
}
}
return enabledServices;
}
private class SettingsPackageMonitor extends PackageMonitor {
@Override
public void onPackageAdded(String packageName, int uid) {
Message message = mHandler.obtainMessage();
mHandler.sendMessageDelayed(message, DELAY_UPDATE_SERVICES_MILLIS);
}
@Override
public void onPackageAppeared(String packageName, int reason) {
Message message = mHandler.obtainMessage();
mHandler.sendMessageDelayed(message, DELAY_UPDATE_SERVICES_MILLIS);
}
@Override
public void onPackageDisappeared(String packageName, int reason) {
Message message = mHandler.obtainMessage();
mHandler.sendMessageDelayed(message, DELAY_UPDATE_SERVICES_MILLIS);
}
@Override
public void onPackageRemoved(String packageName, int uid) {
Message message = mHandler.obtainMessage();
mHandler.sendMessageDelayed(message, DELAY_UPDATE_SERVICES_MILLIS);
}
}
private static ToggleSwitch createAndAddActionBarToggleSwitch(Activity activity) {
ToggleSwitch toggleSwitch = new ToggleSwitch(activity);
final int padding = activity.getResources().getDimensionPixelSize(
R.dimen.action_bar_switch_padding);
toggleSwitch.setPadding(0, 0, padding, 0);
activity.getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM,
ActionBar.DISPLAY_SHOW_CUSTOM);
activity.getActionBar().setCustomView(toggleSwitch,
new ActionBar.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT,
ActionBar.LayoutParams.WRAP_CONTENT,
Gravity.CENTER_VERTICAL | Gravity.RIGHT));
return toggleSwitch;
}
public static class ToggleSwitch extends Switch {
private OnBeforeCheckedChangeListener mOnBeforeListener;
public static interface OnBeforeCheckedChangeListener {
public boolean onBeforeCheckedChanged(ToggleSwitch toggleSwitch, boolean checked);
}
public ToggleSwitch(Context context) {
super(context);
}
public void setOnBeforeCheckedChangeListener(OnBeforeCheckedChangeListener listener) {
mOnBeforeListener = listener;
}
@Override
public void setChecked(boolean checked) {
if (mOnBeforeListener != null
&& mOnBeforeListener.onBeforeCheckedChanged(this, checked)) {
return;
}
super.setChecked(checked);
}
public void setCheckedInternal(boolean checked) {
super.setChecked(checked);
}
}
public static class ToggleAccessibilityServiceFragment extends TogglePreferenceFragment {
@Override
public void onPreferenceToggled(String preferenceKey, boolean enabled) {
// Parse the enabled services.
Set<ComponentName> enabledServices = getEnabledServicesFromSettings(getActivity());
// Determine enabled services and accessibility state.
ComponentName toggledService = ComponentName.unflattenFromString(preferenceKey);
final boolean accessibilityEnabled;
if (enabled) {
// Enabling at least one service enables accessibility.
accessibilityEnabled = true;
enabledServices.add(toggledService);
} else {
// Check how many enabled and installed services are present.
int enabledAndInstalledServiceCount = 0;
Set<ComponentName> installedServices = sInstalledServices;
for (ComponentName enabledService : enabledServices) {
if (installedServices.contains(enabledService)) {
enabledAndInstalledServiceCount++;
}
}
// Disabling the last service disables accessibility.
accessibilityEnabled = enabledAndInstalledServiceCount > 1
|| (enabledAndInstalledServiceCount == 1
&& !installedServices.contains(toggledService));
enabledServices.remove(toggledService);
}
// Update the enabled services setting.
StringBuilder enabledServicesBuilder = new StringBuilder();
// Keep the enabled services even if they are not installed since we have
// no way to know whether the application restore process has completed.
// In general the system should be responsible for the clean up not settings.
for (ComponentName enabledService : enabledServices) {
enabledServicesBuilder.append(enabledService.flattenToString());
enabledServicesBuilder.append(ENABLED_ACCESSIBILITY_SERVICES_SEPARATOR);
}
final int enabledServicesBuilderLength = enabledServicesBuilder.length();
if (enabledServicesBuilderLength > 0) {
enabledServicesBuilder.deleteCharAt(enabledServicesBuilderLength - 1);
}
Settings.Secure.putString(getContentResolver(),
Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES,
enabledServicesBuilder.toString());
// Update accessibility enabled.
Settings.Secure.putInt(getContentResolver(),
Settings.Secure.ACCESSIBILITY_ENABLED, accessibilityEnabled ? 1 : 0);
}
}
public static class ToggleTouchExplorationFragment extends TogglePreferenceFragment {
@Override
public void onPreferenceToggled(String preferenceKey, boolean enabled) {
Settings.Secure.putInt(getContentResolver(),
Settings.Secure.TOUCH_EXPLORATION_ENABLED, enabled ? 1 : 0);
if (enabled) {
SharedPreferences preferences = getActivity().getPreferences(Context.MODE_PRIVATE);
final boolean launchAccessibilityTutorial = !preferences.getBoolean(
KEY_ACCESSIBILITY_TUTORIAL_LAUNCHED_ONCE, false);
if (launchAccessibilityTutorial) {
preferences.edit().putBoolean(KEY_ACCESSIBILITY_TUTORIAL_LAUNCHED_ONCE,
true).commit();
Intent intent = new Intent(AccessibilityTutorialActivity.ACTION);
getActivity().startActivity(intent);
}
}
}
}
private abstract static class TogglePreferenceFragment extends SettingsPreferenceFragment
implements DialogInterface.OnClickListener {
private static final int DIALOG_ID_ENABLE_WARNING = 1;
private static final int DIALOG_ID_DISABLE_WARNING = 2;
private String mPreferenceKey;
private ToggleSwitch mToggleSwitch;
private CharSequence mEnableWarningTitle;
private CharSequence mEnableWarningMessage;
private CharSequence mDisableWarningTitle;
private CharSequence mDisableWarningMessage;
private Preference mSummaryPreference;
private CharSequence mSettingsTitle;
private Intent mSettingsIntent;
private int mShownDialogId;
// TODO: Showing sub-sub fragment does not handle the activity title
// so we do it but this is wrong. Do a real fix when there is time.
private CharSequence mOldActivityTitle;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
PreferenceScreen preferenceScreen = getPreferenceManager().createPreferenceScreen(
getActivity());
setPreferenceScreen(preferenceScreen);
mSummaryPreference = new Preference(getActivity()) {
@Override
protected void onBindView(View view) {
super.onBindView(view);
TextView summaryView = (TextView) view.findViewById(R.id.summary);
summaryView.setText(getSummary());
sendAccessibilityEvent(summaryView);
}
private void sendAccessibilityEvent(View view) {
// Since the view is still not attached we create, populate,
// and send the event directly since we do not know when it
// will be attached and posting commands is not as clean.
AccessibilityManager accessibilityManager =
AccessibilityManager.getInstance(getActivity());
if (accessibilityManager.isEnabled()) {
AccessibilityEvent event = AccessibilityEvent.obtain();
event.setEventType(AccessibilityEvent.TYPE_VIEW_FOCUSED);
view.onInitializeAccessibilityEvent(event);
view.dispatchPopulateAccessibilityEvent(event);
accessibilityManager.sendAccessibilityEvent(event);
}
}
};
mSummaryPreference.setPersistent(false);
mSummaryPreference.setLayoutResource(R.layout.text_description_preference);
preferenceScreen.addPreference(mSummaryPreference);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
installActionBarToggleSwitch();
processArguments();
getListView().setDivider(null);
getListView().setEnabled(false);
}
@Override
public void onDestroyView() {
getActivity().getActionBar().setCustomView(null);
if (mOldActivityTitle != null) {
getActivity().getActionBar().setTitle(mOldActivityTitle);
}
mToggleSwitch.setOnBeforeCheckedChangeListener(null);
super.onDestroyView();
}
public abstract void onPreferenceToggled(String preferenceKey, boolean value);
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
MenuItem menuItem = menu.add(mSettingsTitle);
menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menuItem.setIntent(mSettingsIntent);
}
@Override
public Dialog onCreateDialog(int dialogId) {
CharSequence title = null;
CharSequence message = null;
switch (dialogId) {
case DIALOG_ID_ENABLE_WARNING:
mShownDialogId = DIALOG_ID_ENABLE_WARNING;
title = mEnableWarningTitle;
message = mEnableWarningMessage;
break;
case DIALOG_ID_DISABLE_WARNING:
mShownDialogId = DIALOG_ID_DISABLE_WARNING;
title = mDisableWarningTitle;
message = mDisableWarningMessage;
break;
default:
throw new IllegalArgumentException();
}
return new AlertDialog.Builder(getActivity())
.setTitle(title)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage(message)
.setCancelable(true)
.setPositiveButton(android.R.string.ok, this)
.setNegativeButton(android.R.string.cancel, this)
.create();
}
@Override
public void onClick(DialogInterface dialog, int which) {
final boolean checked;
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
checked = (mShownDialogId == DIALOG_ID_ENABLE_WARNING);
mToggleSwitch.setCheckedInternal(checked);
getArguments().putBoolean(EXTRA_CHECKED, checked);
onPreferenceToggled(mPreferenceKey, checked);
break;
case DialogInterface.BUTTON_NEGATIVE:
checked = (mShownDialogId == DIALOG_ID_DISABLE_WARNING);
mToggleSwitch.setCheckedInternal(checked);
getArguments().putBoolean(EXTRA_CHECKED, checked);
onPreferenceToggled(mPreferenceKey, checked);
break;
default:
throw new IllegalArgumentException();
}
}
private void installActionBarToggleSwitch() {
mToggleSwitch = createAndAddActionBarToggleSwitch(getActivity());
mToggleSwitch.setOnBeforeCheckedChangeListener(new OnBeforeCheckedChangeListener() {
@Override
public boolean onBeforeCheckedChanged(ToggleSwitch toggleSwitch, boolean checked) {
if (checked) {
if (!TextUtils.isEmpty(mEnableWarningMessage)) {
toggleSwitch.setCheckedInternal(false);
getArguments().putBoolean(EXTRA_CHECKED, false);
showDialog(DIALOG_ID_ENABLE_WARNING);
return true;
}
onPreferenceToggled(mPreferenceKey, true);
} else {
if (!TextUtils.isEmpty(mDisableWarningMessage)) {
toggleSwitch.setCheckedInternal(true);
getArguments().putBoolean(EXTRA_CHECKED, true);
showDialog(DIALOG_ID_DISABLE_WARNING);
return true;
}
onPreferenceToggled(mPreferenceKey, false);
}
return false;
}
});
}
private void processArguments() {
Bundle arguments = getArguments();
// Key.
mPreferenceKey = arguments.getString(EXTRA_PREFERENCE_KEY);
// Enabled.
final boolean enabled = arguments.getBoolean(EXTRA_CHECKED);
mToggleSwitch.setCheckedInternal(enabled);
// Title.
PreferenceActivity activity = (PreferenceActivity) getActivity();
if (!activity.onIsMultiPane() || activity.onIsHidingHeaders()) {
mOldActivityTitle = getActivity().getTitle();
String title = arguments.getString(EXTRA_TITLE);
getActivity().getActionBar().setTitle(title);
}
// Summary.
String summary = arguments.getString(EXTRA_SUMMARY);
mSummaryPreference.setSummary(summary);
// Settings title and intent.
String settingsTitle = arguments.getString(EXTRA_SETTINGS_TITLE);
String settingsComponentName = arguments.getString(EXTRA_SETTINGS_COMPONENT_NAME);
if (!TextUtils.isEmpty(settingsTitle) && !TextUtils.isEmpty(settingsComponentName)) {
Intent settingsIntent = new Intent(Intent.ACTION_MAIN).setComponent(
ComponentName.unflattenFromString(settingsComponentName.toString()));
if (!getPackageManager().queryIntentActivities(settingsIntent, 0).isEmpty()) {
mSettingsTitle = settingsTitle;
mSettingsIntent = settingsIntent;
setHasOptionsMenu(true);
}
}
// Enable warning title.
mEnableWarningTitle = arguments.getCharSequence(
AccessibilitySettings.EXTRA_ENABLE_WARNING_TITLE);
// Enable warning message.
mEnableWarningMessage = arguments.getCharSequence(
AccessibilitySettings.EXTRA_ENABLE_WARNING_MESSAGE);
// Disable warning title.
mDisableWarningTitle = arguments.getString(
AccessibilitySettings.EXTRA_DISABLE_WARNING_TITLE);
// Disable warning message.
mDisableWarningMessage = arguments.getString(
AccessibilitySettings.EXTRA_DISABLE_WARNING_MESSAGE);
}
}
}