Android 在后台执行 ImageUpload 并在回调中访问 Intent 数据

Question

嗯，我正在考虑这个问题，我需要社区的帮助。

我想将图片（5 张图片）上传到当前在应用程序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 Intent 服务来执行图像上传。

  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();
            }
        });
    }


}

所以我在这里发送一个成功响应所有注册活动的广播。

我无法解决以下问题，

1.假设从app出来回到activity，如何知道当前上传的图片是什么？

2.如何在回调中访问onHandleIntent() 中的意图数据？，因为在意图数据中我有关于imageType 的信息，所以当请求成功时，我想发送带有imageUrl 和imageType 的广播。

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。这样他们就可以互相交流了。例如，当活动再次开始时，我向服务发送广播通知它。然后该服务将发送一个包含其信息的广播。

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;
        }
    };

}