/**
* Updates the preference that controls whether TalkBack will attempt to request Explore by Touch.
*
* @param requestedState The state requested by the user.
* @return Whether to update the reflected state.
*/
private boolean setTouchExplorationRequested(boolean requestedState) {
final SharedPreferences prefs =
PreferenceManager.getDefaultSharedPreferences(TalkBackPreferencesActivity.this);
// Update the "requested" state. This will trigger a listener in
// TalkBack that changes the "actual" state.
SharedPreferencesUtils.putBooleanPref(
prefs, getResources(), R.string.pref_explore_by_touch_key, requestedState);
// If TalkBack is inactive, we should immediately reflect the change in
// "requested" state.
if (!MyAccessibilityService.isServiceActive()) {
return true;
}
if (requestedState && MyAccessibilityService.getInstance() != null) {
// TODO
// MyAccessibilityService.getInstance().showTutorial();
}
// If accessibility is on, we should wait for the "actual" state to
// change, then reflect that change. If the user declines the system's
// touch exploration dialog, the "actual" state will not change and
// nothing needs to happen.
LogUtils.log(this, Log.DEBUG, "TalkBack active, waiting for EBT request to take effect");
return false;
}
@Override
public void onPause() {
super.onPause();
MyAccessibilityService talkBackService = MyAccessibilityService.getInstance();
if (talkBackService != null && talkBackService.supportsTouchScreen()) {
getContentResolver().unregisterContentObserver(mTouchExploreObserver);
}
if (mExploreByTouchDialog != null) {
mExploreByTouchDialog.dismiss();
}
if (mTreeDebugDialog != null) {
mTreeDebugDialog.dismiss();
}
}
private void updateTalkBackShortcutStatus() {
final CheckBoxPreference preference =
(CheckBoxPreference) findPreferenceByResId(R.string.pref_two_volume_long_press_key);
if (preference == null) {
return;
}
if (Build.VERSION.SDK_INT >= ProcessorVolumeStream.MIN_API_LEVEL) {
preference.setEnabled(MyAccessibilityService.getInstance() != null || preference.isChecked());
} else {
final PreferenceGroup category =
(PreferenceGroup) findPreferenceByResId(R.string.pref_category_miscellaneous_key);
if (category == null) {
return;
}
category.removePreference(preference);
}
}
@Override
public void onResume() {
super.onResume();
MyAccessibilityService talkBackService = MyAccessibilityService.getInstance();
if (talkBackService != null && talkBackService.supportsTouchScreen()) {
registerTouchSettingObserver();
}
if (mExploreByTouchDialog != null) {
mExploreByTouchDialog.show();
}
if (mTreeDebugDialog != null) {
mTreeDebugDialog.show();
}
updateTalkBackShortcutStatus();
updateDimingPreferenceStatus();
}