像“主页”按钮一样覆盖“电源”按钮

Question

好吧，我正在做一些事情，我想禁用设备的所有硬按钮。硬按钮，例如电源，主页，提高音量，降低音量，搜索，返回。我已经成功覆盖了此处几乎所有按钮（电源除外）。因此，我只希望大家看到并请分享一些想法，以便我能摆脱它。我正在以中长按 Power 键事件onDispatchKeyEvent()，这与我想捕捉到同一事件的快捷方式相同。此外，在按下电源时，我还尝试通过获取of 来停止Screen，我成功接收了它，但我无法处理它。BroadcastSCREEN_OFF谢谢。然后，我创建了一个ReceiverScreen来接收屏幕开/关的广播ReceiverScreen.javapublic class ReceiverScreen extends BroadcastReceiver {    public static boolean wasScreenOn = true;    @Override    public void onReceive(Context context, Intent intent) {        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {            // do whatever you need to do here            wasScreenOn = false;        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {            // and do whatever you need to do here            wasScreenOn = true;        }    }}DisableHardButton.javapublic class DisableHardButton extends Activity {@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);    filter.addAction(Intent.ACTION_SCREEN_OFF);    BroadcastReceiver mReceiver = new ReceiverScreen();    registerReceiver(mReceiver, filter);    }@Override    protected void onPause() {        // when the screen is about to turn off        if (ScreenReceiver.wasScreenOn) {            // this is the case when onPause() is called by the system due to a screen state change            System.out.println("SCREEN TURNED OFF");    } else {        // this is when onPause() is called when the screen state has not changed    }    super.onPause();}@Overrideprotected void onResume() {    // only when screen turns on    if (!ScreenReceiver.wasScreenOn) {        // this is when onResume() is called due to a screen state change        System.out.println("SCREEN TURNED ON");    } else {        // this is when onResume() is called when the screen state has not changed    }    super.onResume();}}

Answer 1

与所有答案相反..检查一下：

@Override

public boolean dispatchKeyEvent(KeyEvent event) {

        if (event.getKeyCode() == KeyEvent.KEYCODE_POWER) {

                Log.i("", "Dispath event power");

                Intent closeDialog = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);

                sendBroadcast(closeDialog);

                return true;

        }

        return super.dispatchKeyEvent(event);

}

它能做什么：

每当用户按下电源按钮时。我们取消了对话，甚至看不到它！:) 这对我有用。（在note2上测试）

Answer 2

这是我所做的：

（1）创建一个接收器类：

public class ScreenReceiver extends BroadcastReceiver {

    @Override

    public void onReceive(Context context, Intent intent) {

        String action = intent.getAction();

        switch (action) {

            case Intent.ACTION_SCREEN_OFF:

                BaseActivity.unlockScreen();

                break;

            case Intent.ACTION_SCREEN_ON:

                // and do whatever you need to do here

                BaseActivity.clearScreen();

        }

    }

}

（2）上面调用的两个方法如下所示：

public static void unlockScreen () {

    if (current == null) return;

    Log.i( Constants.TAG, "Turning on screen ... " );

    Window window = current.getWindow();

    window.addFlags( WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD );

    window.addFlags( WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED );

    window.addFlags( WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON   );

}

public static void clearScreen () {

    if (current == null) return;

    Log.i( Constants.TAG, "Clearing screen flag when on ... " );

    Window window = current.getWindow();

    window.clearFlags( WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD );

    window.clearFlags( WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED );

    window.clearFlags( WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON   );

}

private static BaseActivity current;

@Override

protected void onResume () {

    current = this;

}

（3）在主要活动类onCreate（）方法中注册接收者：

    IntentFilter filter = new IntentFilter( Intent.ACTION_SCREEN_ON );

    filter.addAction( Intent.ACTION_SCREEN_OFF );

    registerReceiver(new ScreenReceiver(), filter);