從活動更新IntentService的數據

Question

我有一個IntentService可以將圖像上傳到服務器（下面的源）。 在上傳過程中，用戶可能會選擇更多圖片進行上傳。 現在，它產生了另一個服務。 如何將數據添加到相同的正在運行的服務或如果未運行則生成新服務

public class UploadService extends IntentService {

    public static final String TAG = UploadService.class.getSimpleName();

    public static final String ACTION_UPLOAD = UploadService.class.getName() + ".UPLOAD";
    public static final String EXTRA_RESOURCE_ID = "resource_id";
    public static final String EXTRA_RESOURCE_NAME = "resource_name";
    public static final String EXTRA_IMAGES = "images";

    private static final int CONCURRRENT_UPLOAD_COUNT = 3;
    private static final int UPLOAD_STATUS_PENDING = 0;
    private static final int UPLOAD_STATUS_UPLOADING = 1;
    private static final int UPLOAD_STATUS_UPLOADED = 2;
    private static final int UPLOAD_STATUS_FAILED = 3;
    private static final int UPLOAD_STATUS_TERMINATED = 4;

    private ArrayList<DiskImage> mImages = new ArrayList<>();
    private ArrayMap<DiskImage, Integer> mStatusMap = new ArrayMap<>();
    private OkHttpClient mOkHttpClient = new OkHttpClient();

    public UploadService() {
        super(TAG);
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        if (intent.getAction().equals(ACTION_UPLOAD)) {
            String resId = intent.getStringExtra(EXTRA_RESOURCE_ID);
            String resName = intent.getStringExtra(EXTRA_RESOURCE_NAME);
            ArrayList<DiskImage> images = intent.getParcelableArrayListExtra(EXTRA_IMAGES);
            for (DiskImage image : images) {
                image.mUploadId = resId;
                image.mUploadResName = resName;
            }
            mImages.addAll(images);
            upload(); // start the upload
            updateNotification();
        }
    }

    private int getUploadedImageCount() {
        int count = 0;
        for (int i = 0; i < mImages.size(); i++)
            if (getStatus(mImages.get(i)) == UPLOAD_STATUS_UPLOADED)
                count++;
        return count;
    }

    private void updateNotification() {
        UploadNotification.notify(UploadService.this, mImages.size(), getUploadedImageCount());
    }

    private void upload() {
        final DiskImage image = getImageToUpload();
        if (image != null) {
            // show notification
            MediaType mediaType = MediaType.parse(image.mimeType);
            RequestBody requestBody = new MultipartBody.Builder()
                    .setType(MultipartBody.FORM)
                    .addFormDataPart("resource_id", image.mUploadId)
                    .addFormDataPart("resource_name", image.mUploadResName)
                    .addFormDataPart("image", getName(image.path),
                            RequestBody.create(mediaType, new File(image.path)))
                    .build();
            Request request = new Request.Builder()
                    .url(getUploadUrl())
                    .post(requestBody)
                    .build();
            mStatusMap.put(image, UPLOAD_STATUS_UPLOADING);
//            Log.i(TAG, "Uploading image " + getName(image.path));
            mOkHttpClient.newCall(request).enqueue(new Callback() {
                @Override
                public void onFailure(Call call, IOException e) {
                    mStatusMap.put(image, UPLOAD_STATUS_FAILED);
                    // add failed image in end
                    mImages.remove(image);
                    mImages.add(image);
//                    Log.i(TAG, "Upload failed " + getName(image.path));
                    upload();
                    e.printStackTrace();
                }

                @Override
                public void onResponse(Call call, Response response) throws IOException {
//                    Log.i(TAG, "Uploaded image " + getName(image.path) + " Response: " + response.body().string());
                    mStatusMap.put(image, UPLOAD_STATUS_UPLOADED);
                    upload(); // upload next image
                    updateNotification();
                }
            });
        }
    }

    private String getName(String path) {
        return path.substring(path.lastIndexOf(File.separator) + 1, path.length());
    }

    private DiskImage getImageToUpload() {
        for (int i = 0; i < mImages.size(); i++)
            if (getStatus(mImages.get(i)) == UPLOAD_STATUS_PENDING)
                return mImages.get(i);
        return null;
    }

    private String getUploadUrl() {
        return String.format(Constants.ALBUM_IMAGE_UPLOAD_URL, Preferences.getToken(this));
    }

    private int getStatus(DiskImage image) {
        if (mStatusMap.get(image) == null)
            return UPLOAD_STATUS_PENDING;
        return mStatusMap.get(image);
    }

}

Answer 1

您不能只是extend Service （不是IntentService ），將Activity綁定到Service，然后調用此Service的方法來上傳圖片。

這樣，您的服務將一直運行，直到您在服務中的stopSelf()或有界活動中的stopService()為止。 因此，您可以使用同一服務進行多次上傳。

請讓我知道這個答案是否有幫助...