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我需要每天更新我的应用程序的内容，为此我使用 AlarmManager、BroadcastReceiver 和 IntentService。

我在从 Application 类扩展的类中创建 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();
    }
}

但是我也需要从BroadcastReceiver启动IntentService，但不是从BroadcastReceiver的onReceiver方法启动。我的服务：

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

并为此上课。

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）。

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1 回答 1

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每次客户端通过调用 startService(Intent) 显式启动服务时由系统调用，提供它提供的参数和表示启动请求的唯一整数令牌。不要直接调用此方法。

如果您确实打电话，那么这是首选方式：

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

    return START_REDELIVER_INTENT;
}
于 2013-08-14T10:19:45.847 回答