IntentService中的数据更改

Question

我正在使用IntentService来处理来自FCM的推送通知的消息.它完美的要求,当消息出现一个接一个,但是当设备没有连接到网络,并在设备重新连接FCM发送大量邮件的同时,在这种情况下服务后导致一些模棱两可的同时处理意向数据,在调用Web服务时导致意外行为.

我的推送通知消息处理程序类:

public class PushMessageHandler extends FirebaseMessagingService {

private final static String TAG = "PushMessageHandler";

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);
    if (remoteMessage.getData() != null){
        Log.d(TAG, String.valueOf(remoteMessage.getData()));
        Intent notificationService = new Intent(this, NotificationService.class);
        notificationService.putExtra(ResponseConstants.NOTIFICATION_FIELD,remoteMessage.getData().get(ResponseConstants.NOTIFICATION_FIELD));
        notificationService.putExtra(ResponseConstants.NOTIFICATION_DATA,remoteMessage.getData().get(ResponseConstants.NOTIFICATION_DATA));
        notificationService.putExtra(ResponseConstants.NOTIFICATION_TYPE,remoteMessage.getData().get(ResponseConstants.NOTIFICATION_TYPE));
        try {
            notificationService.putExtra(ResponseConstants.NOTIFICATION_IMAGE,remoteMessage.getData().get(ResponseConstants.NOTIFICATION_IMAGE));
            notificationService.putExtra(ResponseConstants.NOTIFICATION_TITLE, remoteMessage.getData().get(ResponseConstants.NOTIFICATION_TITLE));
        } catch (Exception e){
            Crashlytics.logException(e);
        }
        try {
            notificationService.putExtra(ResponseConstants.DATASETS,remoteMessage.getData().get(ResponseConstants.DATASETS));
        } catch (Exception e){
            Crashlytics.logException(e);
        }
        startService(notificationService);
    } else {
        Log.d(TAG, "Notification data is null");
    }
  }
}

我的通知处理程序服务类:

public class NotificationService extends IntentService implements NotificationContract.View {

@Inject
public NotificationPresenter mNotificationPresenter;

private NotificationContract.Presenter mPresenter;
private static final String TAG = "NotificationService";
private Intent mIntent;


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

@Override
protected void onHandleIntent(@Nullable Intent intent) {
    mIntent  = intent;
    DaggerNotificationPresenterComponent.builder()
            .notificationViewModule(new NotificationViewModule(this))
            .remoteDataSourceComponent(MyApplication.getInstance().providesRemoteDataSource())
            .localDataSourceComponent(MyApplication.getInstance().providesLocalDataSource())
            .build().inject(this);
 }

 @Override
 public synchronized void setPresenter(NotificationContract.Presenter presenter) {

this.mPresenter = presenter;

final String notificationField = mIntent.getStringExtra(ResponseConstants.NOTIFICATION_FIELD);
Log.d(TAG, notificationField);

Handler handler = new Handler(getMainLooper());
handler.post(new Runnable() {
    @Override
    public void run() {
        switch (notificationField.trim()){
            case Constants.NOTIFICATION_FIELD_CACHEHOMEFEEDS :
                mPresenter.prefetchData(Integer.parseInt(
                    mIntent.getStringExtra(ResponseConstants.NOTIFICATION_DATA)),
                    new JSONObject(mIntent.getStringExtra(ResponseConstants.DATASETS)));
                break;
            case Constants.NOTIFICATION_FIELD_UPDATEFEEDS :
                mPresenter.getPostDetailById(Integer.parseInt(
                    mIntent.getStringExtra(ResponseConstants.NOTIFICATION_DATA)),
                    new JSONObject(mIntent.getStringExtra(ResponseConstants.DATASETS)));
                break;
            case Constants.NOTIFICATION_FIELD_ARTICLES :
                mPresenter.getPostDetailsPostUrl(mIntent.getStringExtra(ResponseConstants.NOTIFICATION_DATA));
                break;
            case Constants.NOTIFICATION_FIELD_POSTDELETED :
                mPresenter.deleteFeed(Integer.parseInt(
                        mIntent.getStringExtra(ResponseConstants.NOTIFICATION_DATA)));
                break;
        }
    }
});
}

}

散装推送消息的情况下,我得到NOTIFICATION_DATA的互换价值即我预期的时候通知字段是"NOTIFICATION_FIELD_CACHEHOMEFEEDS"值"后:1234"和字段"NOTIFICATION_FIELD_ARTICLES"是"后:"后-URL'"但我收到"post:1234"提交"NOTIFICATION_FIELD_ARTICLES",该值在任何序列中都可以互换,取决于推送通知的消息调用.

根据IntentService的文档,以队列方式逐个处理请求.那么为什么会这样呢.有没有办法完美地处理这个问题.

Answer 1

IntentService -> onHandleIntent 在后台线程上执行。如果您有耗时的操作，您应该在那里执行它。如果没有 - 只需使用普通服务。

现在在 onHandleIntent 中，您从后台线程多次注入演示者 - 我认为您应该将注入移至构造函数。然后在 onHandleIntent 中调用演示者方法（mPresenter.prefetchData、mPresenter.getPostDetailById 等）。