ActivitySettings.java 文件源码

@Override
protected void onPause() {
    super.onPause();

    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    prefs.unregisterOnSharedPreferenceChangeListener(this);

    unregisterReceiver(interactiveStateReceiver);
    unregisterReceiver(connectivityChangedReceiver);

    if (phone_state) {
        TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        tm.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
        phone_state = false;
    }
}