EnableAccessibilityControllerpublic class EnableAccessibilityController extends Object
| Fields Summary |
|---|
| private static final int | SPEAK_WARNING_DELAY_MILLIS | | private static final int | ENABLE_ACCESSIBILITY_DELAY_MILLIS | | public static final int | MESSAGE_SPEAK_WARNING | | public static final int | MESSAGE_SPEAK_ENABLE_CANCELED | | public static final int | MESSAGE_ENABLE_ACCESSIBILITY | | private final android.os.Handler | mHandler | | private final android.view.IWindowManager | mWindowManager | | private final android.view.accessibility.IAccessibilityManager | mAccessibilityManager | | private final android.content.Context | mContext | | private final Runnable | mOnAccessibilityEnabledCallback | | private final android.os.UserManager | mUserManager | | private final android.speech.tts.TextToSpeech | mTts | | private final android.media.Ringtone | mTone | | private final float | mTouchSlop | | private boolean | mDestroyed | | private boolean | mCanceled | | private float | mFirstPointerDownX | | private float | mFirstPointerDownY | | private float | mSecondPointerDownX | | private float | mSecondPointerDownY |
| Constructors Summary |
|---|
public EnableAccessibilityController(android.content.Context context, Runnable onAccessibilityEnabledCallback)
mContext = context;
mOnAccessibilityEnabledCallback = onAccessibilityEnabledCallback;
mUserManager = (UserManager) mContext.getSystemService(Context.USER_SERVICE);
mTts = new TextToSpeech(context, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (mDestroyed) {
mTts.shutdown();
}
}
});
mTone = RingtoneManager.getRingtone(context, Settings.System.DEFAULT_NOTIFICATION_URI);
mTone.setStreamType(AudioManager.STREAM_MUSIC);
mTouchSlop = context.getResources().getDimensionPixelSize(
R.dimen.accessibility_touch_slop);
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| Methods Summary |
|---|
| public static boolean | canEnableAccessibilityViaGesture(android.content.Context context)
AccessibilityManager accessibilityManager = AccessibilityManager.getInstance(context);
// Accessibility is enabled and there is an enabled speaking
// accessibility service, then we have nothing to do.
if (accessibilityManager.isEnabled()
&& !accessibilityManager.getEnabledAccessibilityServiceList(
AccessibilityServiceInfo.FEEDBACK_SPOKEN).isEmpty()) {
return false;
}
// If the global gesture is enabled and there is a speaking service
// installed we are good to go, otherwise there is nothing to do.
return Settings.Global.getInt(context.getContentResolver(),
Settings.Global.ENABLE_ACCESSIBILITY_GLOBAL_GESTURE_ENABLED, 0) == 1
&& !getInstalledSpeakingAccessibilityServices(context).isEmpty();
| | private void | cancel()
mCanceled = true;
if (mHandler.hasMessages(MESSAGE_SPEAK_WARNING)) {
mHandler.removeMessages(MESSAGE_SPEAK_WARNING);
} else if (mHandler.hasMessages(MESSAGE_ENABLE_ACCESSIBILITY)) {
mHandler.sendEmptyMessage(MESSAGE_SPEAK_ENABLE_CANCELED);
}
mHandler.removeMessages(MESSAGE_ENABLE_ACCESSIBILITY);
| | private void | enableAccessibility()
List<AccessibilityServiceInfo> services = getInstalledSpeakingAccessibilityServices(
mContext);
if (services.isEmpty()) {
return;
}
boolean keyguardLocked = false;
try {
keyguardLocked = mWindowManager.isKeyguardLocked();
} catch (RemoteException re) {
/* ignore */
}
final boolean hasMoreThanOneUser = mUserManager.getUsers().size() > 1;
AccessibilityServiceInfo service = services.get(0);
boolean enableTouchExploration = (service.flags
& AccessibilityServiceInfo.FLAG_REQUEST_TOUCH_EXPLORATION_MODE) != 0;
// Try to find a service supporting explore by touch.
if (!enableTouchExploration) {
final int serviceCount = services.size();
for (int i = 1; i < serviceCount; i++) {
AccessibilityServiceInfo candidate = services.get(i);
if ((candidate.flags & AccessibilityServiceInfo
.FLAG_REQUEST_TOUCH_EXPLORATION_MODE) != 0) {
enableTouchExploration = true;
service = candidate;
break;
}
}
}
ServiceInfo serviceInfo = service.getResolveInfo().serviceInfo;
ComponentName componentName = new ComponentName(serviceInfo.packageName, serviceInfo.name);
if (!keyguardLocked || !hasMoreThanOneUser) {
final int userId = ActivityManager.getCurrentUser();
String enabledServiceString = componentName.flattenToString();
ContentResolver resolver = mContext.getContentResolver();
// Enable one speaking accessibility service.
Settings.Secure.putStringForUser(resolver,
Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES,
enabledServiceString, userId);
// Allow the services we just enabled to toggle touch exploration.
Settings.Secure.putStringForUser(resolver,
Settings.Secure.TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES,
enabledServiceString, userId);
// Enable touch exploration.
if (enableTouchExploration) {
Settings.Secure.putIntForUser(resolver, Settings.Secure.TOUCH_EXPLORATION_ENABLED,
1, userId);
}
// Enable accessibility script injection (AndroidVox) for web content.
Settings.Secure.putIntForUser(resolver, Settings.Secure.ACCESSIBILITY_SCRIPT_INJECTION,
1, userId);
// Turn on accessibility mode last.
Settings.Secure.putIntForUser(resolver, Settings.Secure.ACCESSIBILITY_ENABLED,
1, userId);
} else if (keyguardLocked) {
try {
mAccessibilityManager.temporaryEnableAccessibilityStateUntilKeyguardRemoved(
componentName, enableTouchExploration);
} catch (RemoteException re) {
/* ignore */
}
}
mOnAccessibilityEnabledCallback.run();
| | private static java.util.List | getInstalledSpeakingAccessibilityServices(android.content.Context context)
List<AccessibilityServiceInfo> services = new ArrayList<AccessibilityServiceInfo>();
services.addAll(AccessibilityManager.getInstance(context)
.getInstalledAccessibilityServiceList());
Iterator<AccessibilityServiceInfo> iterator = services.iterator();
while (iterator.hasNext()) {
AccessibilityServiceInfo service = iterator.next();
if ((service.feedbackType & AccessibilityServiceInfo.FEEDBACK_SPOKEN) == 0) {
iterator.remove();
}
}
return services;
| | public void | onDestroy()
mDestroyed = true;
| | public boolean | onInterceptTouchEvent(android.view.MotionEvent event)
if (event.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN
&& event.getPointerCount() == 2) {
mFirstPointerDownX = event.getX(0);
mFirstPointerDownY = event.getY(0);
mSecondPointerDownX = event.getX(1);
mSecondPointerDownY = event.getY(1);
mHandler.sendEmptyMessageDelayed(MESSAGE_SPEAK_WARNING,
SPEAK_WARNING_DELAY_MILLIS);
mHandler.sendEmptyMessageDelayed(MESSAGE_ENABLE_ACCESSIBILITY,
ENABLE_ACCESSIBILITY_DELAY_MILLIS);
return true;
}
return false;
| | public boolean | onTouchEvent(android.view.MotionEvent event)
final int pointerCount = event.getPointerCount();
final int action = event.getActionMasked();
if (mCanceled) {
if (action == MotionEvent.ACTION_UP) {
mCanceled = false;
}
return true;
}
switch (action) {
case MotionEvent.ACTION_POINTER_DOWN: {
if (pointerCount > 2) {
cancel();
}
} break;
case MotionEvent.ACTION_MOVE: {
final float firstPointerMove = MathUtils.dist(event.getX(0),
event.getY(0), mFirstPointerDownX, mFirstPointerDownY);
if (Math.abs(firstPointerMove) > mTouchSlop) {
cancel();
}
final float secondPointerMove = MathUtils.dist(event.getX(1),
event.getY(1), mSecondPointerDownX, mSecondPointerDownY);
if (Math.abs(secondPointerMove) > mTouchSlop) {
cancel();
}
} break;
case MotionEvent.ACTION_POINTER_UP:
case MotionEvent.ACTION_CANCEL: {
cancel();
} break;
}
return true;
|
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