Question

我通过从图库中选择图像或使用Android相机捕获图像来将图像上传到Web服务器。

我需要在通知栏中显示进度。我看到Facebook应用就是这么做的。有没有办法找出上传了多少？

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();

    }

    }

有没有办法找出上传了多少？

Answer 1

这是一个很有用的链接：http://developer.android.com/guide/topics/ui/notifiers/notifications.html#CustomExpandedView

现在在您的自定义布局中使用进度条。

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载和更新进度条

 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完成上传进程的一种常用方法是提供自己的FilterOutputStream子类，它只是对指定的侦听器进行回调每次读出部分流。您只需要覆盖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，如果您的HTTP库允许您将HTTP请求的整个主体（或至少很大一部分）作为OutputStream提供，那么您只能使用此方法。

将图像上传到Android中的服务器时，通知栏中的进度条

2 个答案: