how to cancel the uploading file from gallery to server

Question

This is the code to upload image from my gallery to server this code is working.

But while clicking back button its loading.

Now what i am asking means when i click back button it should go to previous page and the upload should stop.

How can i do this ?

Here is my Code :

package com.politicalmileage.chintamanvanga;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Set;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class ContributeToTheSite extends Activity implements OnClickListener{

    private TextView messageText;
    private Button uploadButton, btnselectpic;
    private ImageView imageview;
    private int serverResponseCode = 0;
    private ProgressDialog dialog = null;

    private String upLoadServerUri = null;
    private String imagepath=null;
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.contributetothesite);

        uploadButton = (Button)findViewById(R.id.uploadButton);
        messageText  = (TextView)findViewById(R.id.messageText);
        btnselectpic = (Button)findViewById(R.id.button_selectpic);
        imageview = (ImageView)findViewById(R.id.imageView_pic);

        btnselectpic.setOnClickListener(this);
        uploadButton.setVisibility(View.INVISIBLE);
        uploadButton.setOnClickListener(this);
        upLoadServerUri = "http://url";
    }


    @Override
    public void onClick(View arg0) {
        if(arg0==btnselectpic)
        {
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent, "Complete action using"), 1);

        }
        else if (arg0==uploadButton) {

             dialog = ProgressDialog.show(ContributeToTheSite.this, "", "Uploading file...", true);
             messageText.setText("uploading started.....");
             new Thread(new Runnable() {
                 public void run() {

                      uploadFile(imagepath);

                 }
               }).start(); 

        }           

    } 

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == 1 && resultCode == RESULT_OK) {
            //Bitmap photo = (Bitmap) data.getData().getPath(); 

            Uri selectedImageUri = data.getData();
            imagepath = getPath(selectedImageUri);
            Bitmap bitmap=BitmapFactory.decodeFile(imagepath);
            imageview.setImageBitmap(bitmap);
            messageText.setText("Uploading file path:" +imagepath);
            uploadButton.setVisibility(View.VISIBLE);
        }
    }
         public String getPath(Uri uri) {
                String[] projection = { MediaStore.Images.Media.DATA };
                Cursor cursor = managedQuery(uri, projection, null, null, null);
                int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                cursor.moveToFirst();
                return cursor.getString(column_index);
            }

    public int uploadFile(String sourceFileUri) {


          String fileName = sourceFileUri;

          HttpURLConnection conn = null;
          DataOutputStream dos = null;  
          String lineEnd = "\r\n";
          String twoHyphens = "--";
          String boundary = "*****";
          int bytesRead, bytesAvailable, bufferSize;
          byte[] buffer;
          int maxBufferSize = 1 * 1024 * 1024; 
          File sourceFile = new File(sourceFileUri); 

          if (!sourceFile.isFile()) {

               dialog.dismiss(); 

               Log.e("uploadFile", "Source File not exist :"+imagepath);

               runOnUiThread(new Runnable() {
                   public void run() {
                       messageText.setText("Source File not exist :"+ imagepath);
                   }
               }); 

               return 0;

          }
          else
          {
               try { 

                     // open a URL connection to the Servlet
                   FileInputStream fileInputStream = new FileInputStream(sourceFile);
                   URL url = new URL(upLoadServerUri);

                   // Open a HTTP  connection to  the URL
                   conn = (HttpURLConnection) url.openConnection(); 
                   conn.setDoInput(true); // Allow Inputs
                   conn.setDoOutput(true); // Allow Outputs
                   conn.setUseCaches(false); // Don't use a Cached Copy
                   conn.setRequestMethod("POST");
                   conn.setRequestProperty("Connection", "Keep-Alive");
                   conn.setRequestProperty("ENCTYPE", "multipart/form-data");
                   conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
                   conn.setRequestProperty("uploaded_file", fileName); 

                   dos = new DataOutputStream(conn.getOutputStream());

                   dos.writeBytes(twoHyphens + boundary + lineEnd); 
                   dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
                                             + fileName + "\"" + lineEnd);

                   dos.writeBytes(lineEnd);

                   // create a buffer of  maximum size
                   bytesAvailable = fileInputStream.available(); 

                   bufferSize = Math.min(bytesAvailable, maxBufferSize);
                   buffer = new byte[bufferSize];

                   // read file and write it into form...
                   bytesRead = fileInputStream.read(buffer, 0, bufferSize);  

                   while (bytesRead > 0) {

                     dos.write(buffer, 0, bufferSize);
                     bytesAvailable = fileInputStream.available();
                     bufferSize = Math.min(bytesAvailable, maxBufferSize);
                     bytesRead = fileInputStream.read(buffer, 0, bufferSize);   

                    }

                   // send multipart form data necesssary after file data...
                   dos.writeBytes(lineEnd);
                   dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

                   // Responses from the server (code and message)
                   serverResponseCode = conn.getResponseCode();
                   String serverResponseMessage = conn.getResponseMessage();

                   Log.i("uploadFile", "HTTP Response is : " 
                           + serverResponseMessage + ": " + serverResponseCode);

                   if(serverResponseCode == 200){

                       runOnUiThread(new Runnable() {
                            public void run() {
                                String msg = "File Upload Completed.\n\n Thanks for Your Contribution to the Mobile App";
                                messageText.setText(msg);
                                Toast.makeText(ContributeToTheSite.this, "Thanks for Your Contribution to the Mobile App.", Toast.LENGTH_SHORT).show();                             
                                finish();
                            }
                        });                
                   }    

                   //close the streams //
                   fileInputStream.close();
                   dos.flush();
                   dos.close();

              } catch (MalformedURLException ex) {

                  dialog.dismiss();  
                  ex.printStackTrace();

                  runOnUiThread(new Runnable() {
                      public void run() {
                          messageText.setText("MalformedURLException Exception : check script url.");
                          Toast.makeText(ContributeToTheSite.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
                      }
                  });

                  Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
              } catch (Exception e) {

                  dialog.dismiss();  
                  e.printStackTrace();

                  runOnUiThread(new Runnable() {
                      public void run() {
                          messageText.setText("Got Exception : see logcat ");
                          Toast.makeText(ContributeToTheSite.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
                      }
                  });
                  Log.e("Upload file to server Exception", "Exception : "  + e.getMessage(), e);  
              }
              dialog.dismiss();       
              return serverResponseCode; 

           } // End else block 
         }

}

use a handler http://developer.android.com/reference/android/os/Handler.html and then u can stop handler whenever you want, but be aware it doesn't guarente that it doesn't uploaded. And you can take a look to http://developer.android.com/reference/android/os/AsyncTask.html — Sercan Ozdemir, Mar 26 '14 at 06:52

score 0 · Answer 1 · 2014-03-26T07:40:05.953

0

You can override the onBackPressed() method of your activity to stop the upload thread when the back button is pressed.

edited Mar 26 '14 at 07:40

answered Mar 26 '14 at 06:53

Amadas · Answer 2 · 2014-03-26T07:37:08.033

You can do that.
First, you must override public void onBackPressed() Method.

     else if (arg0==uploadButton) {

         dialog = ProgressDialog.show(ContributeToTheSite.this, "", "Uploading file...", true);
         messageText.setText("uploading started.....");
         uploadThread = new Thread(new Runnable() {
             public void run() {

                  uploadFile(imagepath);

             }
           }).start(); 

    }

uploadThread is define in class or static for use in onBackPressed method.
After then, uploadThread.stop() where in onBackPressed method.

public void onBackPressed(){
uploadThread.stop();
super.onBackPressed();
}

If this way is not possible, try this.

public class ContributeToTheSite extends Activity implements OnClickListener{
private boolean sendingFile = false;  
...
public void onClick(View arg0) {
    if(arg0==btnselectpic)
    {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Complete action using"), 1);

    }
    else if (arg0==uploadButton) {

         dialog = ProgressDialog.show(ContributeToTheSite.this, "", "Uploading file...", true);
         messageText.setText("uploading started.....");
         sendingFile = true;
         new Thread(new Runnable() {
             public void run() {

                  uploadFile(imagepath);

             }
           }).start(); 

    }           

} 

public void onBackPressed(){
sendingFile = false;
super.onBackPressed();
}

public int uploadFile(String sourceFileUri) {
...
while (bytesRead > 0 && sendingFile ) {

                 dos.write(buffer, 0, bufferSize);
                 bytesAvailable = fileInputStream.available();
                 bufferSize = Math.min(bytesAvailable, maxBufferSize);
                 bytesRead = fileInputStream.read(buffer, 0, bufferSize);   

                }
if( !sendingFile ){
  //to do send message server sending file is canceled.
  return -1;
}
sendingFile = false;
...
...

its not working can u tell me the how to use this i am new in android — user3374790, Mar 26 '14 at 07:25
@user3374790 show my edited answer. This way is cancel sending file, but you control this situation in server. — Amadas, Mar 26 '14 at 07:38

score 0 · Answer 3 · edited May 23 '17 at 11:57

0

actually you can interrupt current thread from the following method define in below so questions. How to stop threads and handlers in Android
i think instead of creating thread you have to use asynctask and cancel current asynctask it is very easy to handle asynctask cancel method java doc

edited May 23 '17 at 11:57

Community

1
1

answered Mar 26 '14 at 06:59

mcd

1,434
15
31

score 0 · Accepted Answer · answered Mar 31 '14 at 08:26

0

try this

 public void onBackPressed() {
    // Do Here what ever you want do on back press;     

    if (conn != null)
    {
        conn.disconnect();
    }

    finish();
}

answered Mar 31 '14 at 08:26

Raj

58
1
13

how to cancel the uploading file from gallery to server

4 Answers4