将图像上传到 Android 中的服务器时通知栏中的进度条

Question

我通过从图库中选取图像或使用 Android 相机捕获图像来将图像上传到网络服务器。

我需要在通知栏中显示进度。我看到 Facebook 应用程序执行此操作。有没有办法知道已经上传了多少内容？

我将图像上传到服务器的代码是：

public void uploadImage() {
    final Toast toast = Toast.makeText(this, "Image uploaded successfully",
        Toast.LENGTH_SHORT);
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Upload");
    builder.setMessage("Do you want to upload the captured picture?");
    builder.setIcon(R.drawable.icon);
    builder.setCancelable(false);
    builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
        testWebService(Bitmap bmp)
        finish();
        toast.show();

        }
    });
    builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {

        dialog.cancel();

        }
    });
    AlertDialog alert = builder.create();
    alert.show();

}



public void testWebService(Bitmap bmp) {

    MarshalBase64 marshal = new MarshalBase64();
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    bmp.compress(CompressFormat.PNG, 100, out);
    byte[] raw = out.toByteArray();

    SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE,
        OPERATION_NAME);

    request.addProperty("image", raw);

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
        SoapEnvelope.VER11);
    envelope.dotNet = true;
    envelope.setOutputSoapObject(request);
    marshal.register(envelope);
    HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);

    try

    {

        httpTransport.call(SOAP_ACTION, envelope);
        Object response = envelope.getResponse();
            }

    catch (Exception exception)

    {
        exception.printStackTrace();

    }

    }

有没有办法知道已上传了多少图像？

Answer 1

这是有用的链接： http://developer.android.com /guide/topics/ui/notifiers/notifications.html#CustomExpandedView

现在，在通知的自定义布局中使用进度栏。

此代码用于跟踪下载。因此，您可以检查上传状态，在服务中启动此异步任务以相应地上传和更新进度栏

 private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> {
 protected Long doInBackground(URL... urls) {
     int count = urls.length;
     long totalSize = 0;
     for (int i = 0; i < count; i++) {
         totalSize += Downloader.downloadFile(urls[i]);
         publishProgress((int) ((i / (float) count) * 100));
     }
     return totalSize;
 }

 protected void onProgressUpdate(Integer... progress) {
     setProgressPercent(progress[0]);
 }

 protected void onPostExecute(Long result) {
     showDialog("Downloaded " + result + " bytes");
 }

Answer 2

我不熟悉您用来进行 SOAP 调用的类，但使用 Apache Commons HttpClient 完成上传进度的常见方法是提供您自己的 FilterOutputStream 子类，该子类每次只对指定的侦听器进行回调流的内容被读出。您只需要重写 write() 方法：

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        out.write(b, off, len);
        transferred += len;
        progressHandler.handleProgress(ProgressDirection.Send, len, transferred, expectedLength);
    }

    @Override
    public void write(int b) throws IOException {
        out.write(b);
        progressHandler.handleProgress(ProgressDirection.Send, 1, ++transferred, expectedLength);
    }

当然，只有当您的 HTTP 库允许您提供 HTTP 请求的整个正文（或至少大部分）作为 OutputStream 时，您才能使用此方法。