所以，我试图将带有一些post命令的文件上传到我的服务器，但是我需要一个进度条。当我尝试在上传过程中检查进度时，它会在上传之前跳至100％。这是我的代码：
MultipartUtility.java
public class MultipartUtility {
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
private String charset;
private OutputStream outputStream;
private PrintWriter writer;
private Activity activity;
public MultipartUtility(Activity activity, String requestURL, String charset)throws IOException{
this.activity = activity;
this.charset = charset;
boundary = "==="+System.currentTimeMillis()+"===";
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type", "multipart/form-data; boundary="+boundary);
httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset), true);
}
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();
}
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();
/*
final ProgressBar pb = (ProgressBar) activity.findViewById(R.id.progress);
pb.post(new Runnable(){
@Override
public void run(){
pb.setVisibility(View.VISIBLE);
//pb.setMax(filesLength);
}
});
*/
FileInputStream inputStream = new FileInputStream(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
//long total = 0;
//int lenghtOfFile = httpConn.getContentLength();
//long filesLength = uploadFile.length();
while((bytesRead = inputStream.read(buffer)) != -1){
outputStream.write(buffer, 0, bytesRead);
//total += bytesRead;
//final int progress = (int)((total*100)/filesLength);
//Log.e("info", progress+"%");
//pb.setProgress(progress);
}
outputStream.flush();
inputStream.close();
writer.append(LINE_FEED);
writer.flush();
}
public void addHeaderField(String name, String value){
writer.append(name+": "+value).append(LINE_FEED);
writer.flush();
}
public String finish()throws IOException{
String response = "";
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 += line;
}
reader.close();
httpConn.disconnect();
}else{
throw new IOException("Server returned non-OK status: "+status);
}
return response;
}
}
我这样称呼它：
new Thread(new Runnable(){
@Override
public void run(){
try{
MultipartUtility multipart = new MultipartUtility(Upload.this, url+"/upvid.php", "UTF-8");
multipart.addFormField("name", name.getText().toString());
multipart.addFormField("desc", desc.getText().toString());
multipart.addFormField("cat", cat.getText().toString());
multipart.addFormField("captcha", captcha.getText().toString());
multipart.addFilePart("file", file);
multipart.addFilePart("file1", file1);
final String response = multipart.finish().toString();
Log.e("info", response);
if(response.equals("<span style='color: #ff0000; font-family: sans-serif'>Please login to post this.</span>")){
user = "";
ePref.remove("user");
ePref.apply();
Intent intent = new Intent(Upload.this, Login.class);
startActivity(intent);
finish();
overridePendingTransition(R.anim.dropdown, R.anim.nill);
}else{
final ProgressBar pb = (ProgressBar) findViewById(R.id.progress);
final TextView info = (TextView) findViewById(R.id.info);
if(response.startsWith("<span style='color: #aaaaaa; font-family: sans-serif'>Video link: ")){
info.post(new Runnable(){
@Override
public void run(){
pb.setVisibility(View.GONE);
info.setVisibility(View.VISIBLE);
info.setText(Html.fromHtml(response));
}
});
}else{
info.post(new Runnable(){
@Override
public void run(){
pb.setVisibility(View.GONE);
info.setVisibility(View.VISIBLE);
info.setText(Html.fromHtml(response));
}
});
}
submit.post(new Runnable(){
@Override
public void run(){
submit.setEnabled(true);
}
});
}
}catch(Exception e){
e.printStackTrace();
submit.post(new Runnable(){
@Override
public void run(){
submit.setEnabled(true);
}
});
}
}
}).start();
如果您有任何疑问，请提供所有帮助。
答案 0 :(得分：0)
兄弟， 您应该使用异步任务进行API调用或数据上传，如下所示：
全局初始化进度对话框
ProgressDialog progressDialog = new ProgressDialog(EditProjectActivity.this);
class DataUpload extends AsyncTask<Void,Void,Void>
{
@Override
protected void onPreExecute() {
super.onPreExecute();
// when this method is called the progress is start
progressDialog.setMessage("please wait");
progressDialog.show();
}
@Override
protected Void doInBackground(Void... voids) {
// call your multipart http
try{
MultipartUtility multipart = new MultipartUtility(Upload.this, url+"/upvid.php", "UTF-8");
multipart.addFormField("name", name.getText().toString());
multipart.addFormField("desc", desc.getText().toString());
multipart.addFormField("cat", cat.getText().toString());
multipart.addFormField("captcha", captcha.getText().toString());
multipart.addFilePart("file", file);
multipart.addFilePart("file1", file1);
final String response = multipart.finish().toString();
Log.e("info", response);
if(response.equals("<span style='color: #ff0000; font-family: sans-serif'>Please login to post this.</span>")){
user = "";
ePref.remove("user");
ePref.apply();
Intent intent = new Intent(Upload.this, Login.class);
startActivity(intent);
finish();
overridePendingTransition(R.anim.dropdown, R.anim.nill);
}else{
final ProgressBar pb = (ProgressBar) findViewById(R.id.progress);
final TextView info = (TextView) findViewById(R.id.info);
if(response.startsWith("<span style='color: #aaaaaa; font-family: sans-serif'>Video link: ")){
info.post(new Runnable(){
@Override
public void run(){
pb.setVisibility(View.GONE);
info.setVisibility(View.VISIBLE);
info.setText(Html.fromHtml(response));
}
});
}else{
info.post(new Runnable(){
@Override
public void run(){
pb.setVisibility(View.GONE);
info.setVisibility(View.VISIBLE);
info.setText(Html.fromHtml(response));
}
});
}
submit.post(new Runnable(){
@Override
public void run(){
submit.setEnabled(true);
}
});
}
}catch(Exception e){
e.printStackTrace();
submit.post(new Runnable(){
@Override
public void run(){
submit.setEnabled(true);
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
progressDialog.dismiss();
// when method complete its job the progress stopp
}
}
现在调用该方法使用：
DataUpload dataup = new DataUpload（this）; dataup.execute（）;