我的程序正在从 SD 卡上传视频没有问题，但我正在尝试添加一个进度对话框以显示到目前为止上传的字节数百分比。我正在使用异步任务。但是，尽管我能够在屏幕上显示对话框。对话框未更新。上传完成后，它变成 100/100 并消失。你能帮我如何更新进度对话框吗？
package com.isoft.uploader2;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class Proje2Activity extends Activity
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button select =(Button)findViewById(R.id.select);
Button back =(Button)findViewById(R.id.back1);
Button camera =(Button)findViewById(R.id.camera);
//Select a video from SD-Card
select.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
openGaleryVideo();
}
});
//Turn back
back.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
finish();
}
});
//Record a video
camera.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivity(intent);
}
});
}
/** Called when the activity is first created. */
public static final int SELECT_VIDEO=1;
public static final String TAG="UploadActivity";
String path="";
//Open Gallery
public void openGaleryVideo()
{
Intent intent=new Intent();
intent.setType("video/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Video"),SELECT_VIDEO);
}
//Select the video and start to execute the upload class
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
if (requestCode == SELECT_VIDEO)
{
Uri videoUri = data.getData();
path= getPath(videoUri);
upload upload = new upload();
upload.execute();
}
}
}
//Getting the URİ from the SD Card
public String getPath(Uri uri)
{
String[] projection = { MediaStore.Video.Media.DATA};
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
//ASYNC TASK Upload Class which uploads the file and shows the progress via a dialog
public class upload extends AsyncTask<Object, Integer, Void>
{
//Initializations
public ProgressDialog dialog;
File file=new File(path);
String urlServer = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
String filename=file.getName();
int bytesRead, bytesAvailable, bufferSize,progress;
byte[] buffer;
int maxBufferSize = 20*1024*1024;
//Before start to upload the file creating a dialog
@Override
public void onPreExecute()
{
dialog = new ProgressDialog(Proje2Activity.this);
dialog.setMessage("Uploading...");
dialog.setIndeterminate(false);
dialog.setTitle("UPLOADING");
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setProgress(0);
dialog.setMax(100);
dialog.show();
//Burada işlemi yapmadan önce ilk olarak ne yaptırmak istiyorsak burada yaparız.
//Örneğin burada dialog gösterip "onPostExecute()" metodunda dismiss edebiliriz.
}
//Uploading the file in background with showing the progress
@Override
public Void doInBackground(Object... arg0)
{
// TODO Auto-generated method stub
try
{
final FileInputStream fileInputStream = new FileInputStream(file);
URL url = new URL(urlServer);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setFixedLengthStreamingMode((int) file.length());
// Allow Inputs & Outputs
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
// Enable POST method
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Content-Type", "multipart/form-data");
connection.setRequestProperty("SD-FileName", filename);//This will be the file name
final DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// Read file
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0)
{
progress=0;
progress+=bytesRead;
outputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
publishProgress((int)((progress*100)/(file.length())));
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
progress+=bytesRead;
}//end of while statement
fileInputStream.close();
publishProgress(100);
outputStream.flush();
outputStream.close();
}//end of try body
catch (Exception ex)
{
//ex.printStackTrace();
Log.e("Error: ", ex.getMessage());
}
return null;
}//end of doInBackground method
//making an update on progress
@Override
public void onProgressUpdate(Integer... values)
{
super.onProgressUpdate(values);
dialog.setProgress(values[0]);
}//end of onProgressUpdate
//After finishing the progress the dialog will disappear!
@Override
public void onPostExecute(Void result)
{
try
{
dialog.dismiss();
} //End of the second try body
catch(Exception e)
{
}
}//end of onPostExecute method
}// end of asyncTask class
}//end of main