如何檢測android設備上的屏幕是否為觸摸屏

Question

我正在編寫不使用dayDream的應用程序Screenserver。

ScreenSaverActivity我覆蓋ontouch：

@Override   public boolean onTouch(View v, MotionEvent event) {

        Long time = new GregorianCalendar().getTimeInMillis()+ 10*1000;

        Intent intentAlarm = new Intent(this, AlarmReciever.class);

        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

        alarmManager.set(AlarmManager.RTC_WAKEUP,time, PendingIntent.getBroadcast(this, 1, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT));
        startService(new Intent(this, MyService.class));

        this.onBackPressed(); // turn off app
        return false;   }

AlrmService.class

public class AlarmReciever extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        // TODO Auto-generated method stub

        Intent i = new Intent();
        i.setClassName("edu.com.screensaver", "edu.com.screensaver.ScreenSaverActivity");
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(i); // turn on again
    }

}

我想要更新alrmActivity的時間，所以我添加了MyService.class處理觸摸事件

public class MyService extends Service implements OnTouchListener{
 @Override
    public boolean onTouch(View v, MotionEvent event) {
        Toast.makeText(this, "MyService click", Toast.LENGTH_LONG).show();
        if(event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_UP)
            Log.i(TAG, "Action :" + event.getAction() + "\t X :" + event.getRawX() + "\t Y :"+ event.getRawY());

        return true;
    }
}

永遠不會調用“ MyService click”消息。 當我在10秒后觸摸主要活動時，該應用程序再次打開。

任何解決方案都歡迎。

謝謝

Answer 1

試試這個代碼：

boolean isTouchSupported = getPackageManager（）。hasSystemFeature（“ android.hardware.touchscreen”）;