Question

我需要每天更新我的应用程序的接口，并使用AlarmManager，BroadcastReceiver和IntentService。

我在从Application类扩展的类中创建了AlarmManager对象和setRepeating：

 private void setRecurringAlarm(Context context) {
          Intent intent = new Intent(AlarmReceiver.ACTION_ALARM);
          AlarmManager alarms = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
          final PendingIntent pIntent = PendingIntent.getBroadcast(this,
                     1234567, intent, PendingIntent.FLAG_UPDATE_CURRENT);
          alarms.setRepeating(AlarmManager.RTC,
          System.currentTimeMillis(), 10000, pIntent);
          Toast.makeText(getApplicationContext(), "started", Toast.LENGTH_SHORT).show();
        }

我的BroadcastReceiver成功获取消息：

  public class AlarmReceiver extends BroadcastReceiver {

    private static final String DEBUG_TAG = "AlarmReceiver";
    public static String ACTION_ALARM = "com.alarammanager.alaram";
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent downloader = new Intent(context, UpdateService.class);
        downloader.setAction(Constants.UPDATE_SERVICE);
        context.startService(downloader);
        Toast.makeText(context, "Entered", Toast.LENGTH_SHORT).show();
    }
}

但我还需要从BroadcastReceiver启动IntentService，但它不是从onReceiver的BroadcastReceiver方法开始的。我的服务：

<service android:name="com.services.UpdateService" 
        android:enabled="true">
         <intent-filter>
            <action android:name="com.service.UpdateService" />
        </intent-filter>
</service>

并为它上课。

public class UpdateService extends IntentService {

        public UpdateService() {
            super("UpdateService");
        }

        @Override
        protected void onHandleIntent(Intent intent) {
            Log.d("UpdateService", "About to execute MyTask");
            //  new MyTask().execute();
            Toast.makeText(getApplicationContext(), "updateService", Toast.LENGTH_SHORT).show();
        }
        // Sometimes overriding onStartCommand will not call onHandleIntent
        public int onStartCommand(Intent intent, int flags, int startId) {
            Log.i("asdasd", "here..!");
            return super.onStartCommand(intent,flags,startId);
        }
    }

我的问题是为什么不能从BroadcastReceiver调用它（IntentService）。

Answer 1

每次客户端明确启动服务时由系统调用通过调用startService（Intent），提供它提供的参数以及表示开始请求的唯一整数标记。不要打电话这个方法直接。

如果你打电话，那么这是首选方式：

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    handleCommand(intent);

    return START_REDELIVER_INTENT;
}

无法从BroadcastReceiver调用IntentService

1 个答案: