Android在后台执行ImageUpload并在回调中访问意图数据

Question

嗯，我已经考虑过这个问题，我需要社区的帮助。

我想上传图片（5张图片）到当前在app的异步任务中完成的服务器。因此，当用户关闭应用程序时可以停止上传，所以我想使用IntentService执行此操作。

所以我创建了我的意图服务来执行图片上传。

public class ImageUploadService extends IntentService { 


    /** 
    * Creates an IntentService. Invoked by your subclass's constructor. 
    * 
    * @param name Used to name the worker thread, important only for debugging. 
    */ 
    public ImageUploadService(String name) {super(name);} 

    public ImageUploadService(){ 
     this(ImageUploadService.class.getName()); 
    } 


    @Override 
    protected void onHandleIntent(Intent intent) { 
     //todo perform long running image upload operation 

     KbUserService kbUserService = JacksonRestRequestBuilder 
       .setupUploadRestService(RestUrls.BASE_URL_CUSTOMER, true, 
         KbUserService.class, getApplicationContext()); 

     LinkedHashMap<String, Object> requestBody = new LinkedHashMap<>(); 


     Call<LinkedHashMap<String,Object>> call = kbUserService.uploadFile(requestBody); 

     call.enqueue(new KbCallback() { 
      @Override 
      public void failure(Map<String, Object> serverErrorResponse, String genericErrorMessage) { 
       //todo send notification that image upload failed and also send broadcast event that image upload failed. 
      } 

      @Override 
      public void success(Map<String, Object> successResponse) { 

       Map<String, Object> modelDataFromResponseAsMap = 
         ClientModelUtils.getModelDataFromResponseAsMap(successResponse); 
//     Log.i(NAME,"Background Image upload completed for "+msg.arg1); 
       String fileUrl = ClientModelUtils.getString(modelDataFromResponseAsMap, 
         ModelConstants.UserConstants.IMAGE_URL); 
       //todo send notification that image upload success and send broadcast that image upload success. 
//     uploadFileSuccess(fileUrl, profName); 
//     bean.setUploadInProgress(false); 
//     view.uploadFileSuccess(fileUrl,profName); 
      } 

      @Override 
      public void networkOrUnexpectedError(String message) { 
       //todo send notification that image upload failed and also send broadcast event that image upload failed. 
      } 
     }); 

    } 

    protected void showToast(final String msg){ 
     //gets the main thread 
     Handler handler = new Handler(Looper.getMainLooper()); 
     handler.post(new Runnable() { 
      @Override 
      public void run() { 
       // run this code in the main thread 
       Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 


} 

所以我在这里发送广播成功响应所有注册的活动。

我不能够解决以下问题，

1.Suppose时出来的应用程序，并回到活动，怎么知道什么是当前上传图片？

2.How访问意图数据onHandleIntent()内回调？因为意图数据我有，所以当请求成功，我想与imageUrl和imageType发送广播有关imageType信息。

Answer 1

这可能不是理想的答案，但我通常在服务和活动上都有广播接收器。这样他们可以相互沟通。例如，当活动再次开始时，我会向通知它的服务发送广播。该服务将随后发送广播及其信息。

public class SomeService extends Service { 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     registerReceiver(receiver, new IntentFilter(SOME_SERVICE_ACTIONS)); 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 

     unregisterReceiver(receiver); 
    } 

    private BroadcastReceiver receiver = new BroadcastReceiver() { 
     @Override 
     public void onReceive(Context context, Intent intent) { 
      switch (intent.getIntExtra(SERVICE_COMMAND, 0)) { 
       case ACTIVITY_STARTED: 
        sendCallback(); 

       break; 
     } 
    }; 

}