java - 当设备处于锁定状态且屏幕处于关闭状态时，如何运行我的应用程序？

Question

当手机锁定且屏幕关闭时，我使用警报服务来保持应用程序运行，但它不起作用。

我的警报服务类别是:

public class AlarmService extends BroadcastReceiver {

  // Restart service every 60 seconds
  private static final long REPEAT_TIME = 1000 * 60;

  @Override
  public void onReceive(Context context, Intent intent) {
    AlarmManager service = (AlarmManager) context
        .getSystemService(Context.ALARM_SERVICE);
    Intent i = new Intent(context, StartUp_broadcast.class);
    PendingIntent pending = PendingIntent.getBroadcast(context, 0, i,
        PendingIntent.FLAG_CANCEL_CURRENT);
    Calendar cal = Calendar.getInstance();
    // Start 60 seconds after boot completed
    cal.add(Calendar.SECOND, 60);
    //
    // Fetch every 60 seconds
    // InexactRepeating allows Android to optimize the energy consumption
    service.setRepeating   (AlarmManager.RTC_WAKEUP,
        cal.getTimeInMillis(), REPEAT_TIME, pending);

    // service.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
    // REPEAT_TIME, pending);

  }
} 

我的广播服务类别是:

public class StartUp_broadcast extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    Intent myIntent = new Intent(context, AlarmService.class);
    PendingIntent pendingIntent = PendingIntent.
                                     getService(context, 0, myIntent, 0);
    AlarmManager alarmManager = (AlarmManager) context
                                .getSystemService(Context.ALARM_SERVICE);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
                  System.currentTimeMillis() + 1000, 1000, pendingIntent);
    Intent Startup_Intent = new Intent(context, LocationService.class);
    Startup_Intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startService(Startup_Intent);
}

}

我的主要 Activity 类具有用于 WakeLock 的 PowerManager 服务

 @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakeUp");
    wl.acquire(1000); //wake up the screen
    setContentView(R.layout.main);

    this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);

请帮助我。当手机锁定且 scrren 关闭时如何保持我的应用程序运行？

Answer 1

如果您想在屏幕锁定时运行应用程序并运行警报，那么您需要在启动时启动服务。也许这个链接对您有帮助。 http://www.androidcompetencycenter.com/2009/06/start-service-at-boot/

首先阅读并一步一步地自己做。我希望它对你有帮助。