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android - 上传百分比时如何显示进度条

转载 作者:塔克拉玛干 更新时间:2023-11-02 21:03:33 25 4
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我正在上传视频和照片。它工作正常。现在我想在用百分比上传数据时显示进度条。我引用了 android hive 及其在 httpclient 中的实现,我修改了它因此 httpurlconnection。任何帮助将不胜感激。谢谢。

这是我执行异步任务的主要 Activity 。

protected void onProgressUpdate(Integer... progress) {
// Making progress bar visible
progressBar.setVisibility(View.VISIBLE);

// updating progress bar value
progressBar.setProgress(progress[0]);

// updating percentage value
txtPercentage.setText(String.valueOf(progress[0]) + "%");
}

@Override
protected String doInBackground(Void... params) {
return uploadFile();
}

@SuppressWarnings("deprecation")
private String uploadFile() {
String responseString = null;
String charset = "UTF-8";
String requestURL = "YOUR_URL";

VideoUpload multipart = null;
try {
multipart = new VideoUpload(Config.FILE_UPLOAD_URL, charset);
} catch (IOException e) {
e.printStackTrace();
}

{
//========================================================
AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
new AndroidMultiPartEntity.ProgressListener() {

@Override
public void transferred(long num) {
publishProgress((int) ((num / (float) totalSize) * 100));
}
});
//========================================================
multipart.addFormField("website", "www.androidhive.info");
multipart.addFormField("email", "abc@gmail.com");
try {
multipart.addFilePart("image", new File(filePath));
} catch (IOException e) {
e.printStackTrace();
}

try {
List<String> response = multipart.finish(); // response from server.
} catch (IOException e) {
e.printStackTrace();
}
}

return responseString;
}

@Override
protected void onPostExecute(String result) {
Log.e(TAG, "Response from server: " + result);

// showing the server response in an alert dialog
showAlert(result);

super.onPostExecute(result);
}

}

这是我的 httpurlconnections 及其工作的上传类。

public VideoUpload(String requestURL, String charset)
throws IOException {
this.charset = charset;

// creates a unique boundary based on time stamp
boundary = "===" + System.currentTimeMillis() + "===";

URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
httpConn.setRequestProperty("Test", "Bonjour");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
}

/**
* Adds a form field to the request
*
* @param name field name
* @param value field value
*/
public void addFormField(String name, String value) {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
.append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
}

/**
* Adds a upload file section to the request
*
* @param fieldName name attribute in <input type="file" name="..." />
* @param uploadFile a File to be uploaded
* @throws IOException
*/
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();

FileInputStream inputStream = new FileInputStream(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();

writer.append(LINE_FEED);
writer.flush();
}

/**
* Adds a header field to the request.
*
* @param name - name of the header field
* @param value - value of the header field
*/
public void addHeaderField(String name, String value) {
writer.append(name + ": " + value).append(LINE_FEED);
writer.flush();
}

/**
* Completes the request and receives response from the server.
*
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
* @throws IOException
*/
public List<String> finish() throws IOException {
List<String> response = new ArrayList<String>();

writer.append(LINE_FEED).flush();
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();

// checks server's status code first
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
httpConn.disconnect();
} else {
throw new IOException("Server returned non-OK status: " + status);
}

return response;
}

这里我从androidhive中获取了进度条类,但我不知道如何使用它

public class AndroidMultiPartEntity extends MultipartEntity

{

private final ProgressListener listener;

public AndroidMultiPartEntity(final ProgressListener listener) {
super();
this.listener = listener;
}

public AndroidMultiPartEntity(final HttpMultipartMode mode,
final ProgressListener listener) {
super(mode);
this.listener = listener;
}

public AndroidMultiPartEntity(HttpMultipartMode mode, final String boundary,
final Charset charset, final ProgressListener listener) {
super(mode, boundary, charset);
this.listener = listener;
}

@Override
public void writeTo(final OutputStream outstream) throws IOException {
super.writeTo(new CountingOutputStream(outstream, this.listener));
}

public static interface ProgressListener {
void transferred(long num);
}

public static class CountingOutputStream extends FilterOutputStream {

private final ProgressListener listener;
private long transferred;

public CountingOutputStream(final OutputStream out,
final ProgressListener listener) {
super(out);
this.listener = listener;
this.transferred = 0;
}

public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
this.transferred += len;
this.listener.transferred(this.transferred);
}

public void write(int b) throws IOException {
out.write(b);
this.transferred++;
this.listener.transferred(this.transferred);
}
}
}

最佳答案

AsyncTask 类中有一个progressUpdate 方法,它会返回文件上传的进度,这是我的代码,可能会对你有所帮助。

        private final ProgressDialog mDialog;

mDialog = new ProgressDialog(context);
mDialog.setMax(100);
mDialog.setMessage("Uploading " + file.getName());
mDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mDialog.setProgress(0);
mDialog.setButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// This will cancel the putFile operation
mRequest.abort();
}
});
mDialog.show();

@Override
protected void onProgressUpdate(Long... progress) {
int percent = (int)(100.0*(double)progress[0]/mFileLen + 0.5);
mDialog.setProgress(percent);
}

关于android - 上传百分比时如何显示进度条,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35076978/

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