Ensure that listener is removed only if it was added (2fe4b3cb) · Commits · e / os / android_packages_apps_Settings

src/com/android/settings/WifiCallingSettings.java

+7 −1

Original line number	Diff line number	Diff line
		@@ -57,6 +57,8 @@ public class WifiCallingSettings extends SettingsPreferenceFragment
		private ListPreference mButtonWfcMode;
		private TextView mEmptyView;

		private boolean mValidListener = false;

		private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
		/*
		* Enable/disable controls when in/out of a call and depending on
		@@ -172,6 +174,8 @@ public class WifiCallingSettings extends SettingsPreferenceFragment
		tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);

		mSwitchBar.addOnSwitchChangeListener(this);

		mValidListener = true;
		}

		// NOTE: Buttons will be enabled/disabled in mPhoneStateListener
		@@ -196,7 +200,9 @@ public class WifiCallingSettings extends SettingsPreferenceFragment

		final Context context = getActivity();

		if (ImsManager.isWfcEnabledByPlatform(getActivity())) {
		if (mValidListener) {
		mValidListener = false;

		TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
		tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);