java - 保持振动器在 sleep 模式下运行

Question

即使在 sleep 模式(屏幕锁定)后我也试图让振动器保持运行，但应用程序无法运行。我不知道我错过了什么..

除了Wake Lock和BroadcastReceiver还有其他解决方案吗？

(请勿预判，每4点57分震动一次)

public class MainActivity extends Activity {

    public BroadcastReceiver vibrateReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent)
        {
            if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){
                Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                long[] pattern = {0, 3000, 297000};
                v.vibrate(pattern, 0);
            }
        }
    };

    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

Answer 1

首先，创建基于报警服务实例的服务调度器。 ……就像那样。

public class ScheduledLocalisationExecutor {

    private Context context;
    private AlarmManager alarmManager;
    private Intent broadcastIntent;
    private PendingIntent pendingIntent;
    private DbxStart dbxStart;


    public ScheduledLocalisationExecutor(Context appContext) {
        context = appContext;
        dbxStart = new DbxStart();
    }

    public void setUpScheduledService(long updateTime) {
        if (dbxStart.getOpenedDatastore() == null) {
            Log.e("DROPBOX", "Dropbox account is not linked...");
            return;
        }
        Log.w("scheduled factory","updating Service!");
        broadcastIntent = new Intent(context, LocalisationUpdatesReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(context, 0, broadcastIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis() + updateTime, pendingIntent);
    }

}

现在在 android list 中注册您的广播接收器。

 <receiver android:name=".receivers.LocalisationUpdatesReceiver">
        </receiver>

并创建您的广播接收器。

public class LocalisationUpdatesReceiver extends BroadcastReceiver {
 @Override
        public void onReceive(Context context, Intent intent)
        {
            if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){
                Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                long[] pattern = {0, 3000, 297000};
                v.vibrate(pattern, 0);
            }
        }
}

遵循这个方案，你就会成功!