@Override
public void onPause() {
mSettingsPackageMonitor.unregister();
mSettingsContentObserver.unregister(getContentResolver());
if (RotationPolicy.isRotationSupported(getActivity())) {
RotationPolicy.unregisterRotationPolicyListener(getActivity(), mRotationPolicyListener);
}
super.onPause();
}
@Override
public void onResume() {
super.onResume();
loadInstalledServices();
updateAllPreferences();
mSettingsPackageMonitor.register(getActivity(), getActivity().getMainLooper(), false);
mSettingsContentObserver.register(getContentResolver());
if (RotationPolicy.isRotationSupported(getActivity())) {
RotationPolicy.registerRotationPolicyListener(getActivity(), mRotationPolicyListener);
}
}
private void initializeAllPreferences() {
mServicesCategory = (PreferenceCategory) findPreference(SERVICES_CATEGORY);
mSystemsCategory = (PreferenceCategory) findPreference(SYSTEM_CATEGORY);
// Large text.
mToggleLargeTextPreference = (SwitchPreference) findPreference(TOGGLE_LARGE_TEXT_PREFERENCE);
// Text contrast.
mToggleHighTextContrastPreference =
(SwitchPreference) findPreference(TOGGLE_HIGH_TEXT_CONTRAST_PREFERENCE);
// Display inversion.
mToggleInversionPreference = (SwitchPreference) findPreference(TOGGLE_INVERSION_PREFERENCE);
mToggleInversionPreference.setOnPreferenceChangeListener(this);
// Power button ends calls.
mTogglePowerButtonEndsCallPreference =
(SwitchPreference) findPreference(TOGGLE_POWER_BUTTON_ENDS_CALL_PREFERENCE);
if (!KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_POWER)
|| !Utils.isVoiceCapable(getActivity())) {
mSystemsCategory.removePreference(mTogglePowerButtonEndsCallPreference);
}
// Lock screen rotation.
mToggleLockScreenRotationPreference =
(SwitchPreference) findPreference(TOGGLE_LOCK_SCREEN_ROTATION_PREFERENCE);
if (!RotationPolicy.isRotationSupported(getActivity())) {
mSystemsCategory.removePreference(mToggleLockScreenRotationPreference);
}
// Speak passwords.
mToggleSpeakPasswordPreference =
(SwitchPreference) findPreference(TOGGLE_SPEAK_PASSWORD_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]);
}
}
// Captioning.
mCaptioningPreferenceScreen = (PreferenceScreen) findPreference(CAPTIONING_PREFERENCE_SCREEN);
// Display magnification.
mDisplayMagnificationPreferenceScreen =
(PreferenceScreen) findPreference(DISPLAY_MAGNIFICATION_PREFERENCE_SCREEN);
// Display color adjustments.
mDisplayDaltonizerPreferenceScreen =
(PreferenceScreen) findPreference(DISPLAY_DALTONIZER_PREFERENCE_SCREEN);
// Global gesture.
mGlobalGesturePreferenceScreen =
(PreferenceScreen) findPreference(ENABLE_ACCESSIBILITY_GESTURE_PREFERENCE_SCREEN);
final int longPressOnPowerBehavior =
getActivity()
.getResources()
.getInteger(com.android.internal.R.integer.config_longPressOnPowerBehavior);
final int LONG_PRESS_POWER_GLOBAL_ACTIONS = 1;
if (!KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_POWER)
|| longPressOnPowerBehavior != LONG_PRESS_POWER_GLOBAL_ACTIONS) {
// Remove accessibility shortcut if power key is not present
// nor long press power does not show global actions menu.
mSystemsCategory.removePreference(mGlobalGesturePreferenceScreen);
}
}