Estimote iBeacon:后台监控 (Android) [英] Estimote iBeacon: Monitoring in background (Android)

问题描述

我希望在我的应用程序打开但处于后台时收到推送通知.现在我已经更改了 Estimote Demo，当我的应用程序处于前台时，我的应用程序会给我一个通知，这并没有多大用处.我在这里发布了我的 NotifyDemoActivity 类的代码，一旦我打开应用程序就会调用它

I would like to have push notifications when my app is open but is in background. For now I have changed the Estimote Demo, and my app gives me a notification when my app is in foreground which is not much of use. I post here my code of NotifyDemoActivity class which is called as soon as I open the app

public class NotifyDemoActivity extends Activity {
  private static final String TAG = NotifyDemoActivity.class.getSimpleName();
  private static final int NOTIFICATION_ID = 123;
  private BeaconManager beaconManager;
  private NotificationManager notificationManager;
  private Region region;
  private long[] mVibratePattern = { 0, 200, 200, 300 };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.notify_demo);
    getActionBar().setDisplayHomeAsUpEnabled(true);

    beacon.getMinor());
    region = new Region("rid", null, null, null);
    notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    beaconManager = new BeaconManager(this);

    beaconManager.setBackgroundScanPeriod(TimeUnit.SECONDS.toMillis(1), 0);

    beaconManager.setMonitoringListener(new MonitoringListener() {
      @Override
      public void onEnteredRegion(Region region, List<Beacon> beacons) {
        postNotification("Entered region");
      }

      @Override
      public void onExitedRegion(Region region) {
        postNotification("Exited region");
      }
    });
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == android.R.id.home) {
      finish();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  @Override
  protected void onResume() {
    super.onResume();
    notificationManager.cancel(NOTIFICATION_ID);
    beaconManager.connect(new BeaconManager.ServiceReadyCallback() {
      @Override
      public void onServiceReady() {
        try {
          beaconManager.startMonitoring(region);
        } catch (RemoteException e) {
          Log.d(TAG, "Error while starting monitoring");
        }
      }
    });
  }

  @Override
  protected void onDestroy() {
    notificationManager.cancel(NOTIFICATION_ID);
    beaconManager.disconnect();
    super.onDestroy();
  }

  private void postNotification(String msg) {
    Intent notifyIntent = new Intent(NotifyDemoActivity.this, NotifyDemoActivity.class);
    notifyIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivities(
      NotifyDemoActivity.this,
      0,
      new Intent[]{notifyIntent},
      PendingIntent.FLAG_UPDATE_CURRENT);
    Notification notification = new Notification.Builder(NotifyDemoActivity.this)
    .setSmallIcon(R.drawable.beacon_gray)
    .setContentTitle("Notify Demo")
    .setContentText(msg)
    .setAutoCancel(true)
    .setContentIntent(pendingIntent)
    .setVibrate(mVibratePattern)
    .build();
    notification.defaults |= Notification.DEFAULT_SOUND;
    notification.defaults |= Notification.DEFAULT_LIGHTS;
    notificationManager.notify(NOTIFICATION_ID, notification);

    TextView statusTextView = (TextView) findViewById(R.id.status);
    statusTextView.setText(msg);
  }
}

推荐答案

你应该把 BeaconManager 放在你的应用程序类而不是活动中.

You should hold BeaconManager in your application class not in the activity.

Activity 将被停止、销毁并且 BeaconManager 将停止监控.另一方面，应用程序仍将保持引用并继续监控.

Activity will be stopped, destroyed and BeaconManager will stop monitoring. Application on the other hand will still hold reference and will continue to monitor.

当在监视您的应用程序类时发现信标时，可以发布通知.当用户决定点击它时，它会触发一些活动.

When a beacon is being found while monitoring your application class can post a notification. It trigger some activity when user decides to tap on it.

这篇关于Estimote iBeacon:后台监控 (Android)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！