Upload multiple images to server in a queue

This is how you can do: this is the sample code to upload the Image from device by passing the path of the image..similarly you can do it for Image url,Steps:1) Create a thread which will run for each image.2) after that each image upload will give you the response.3) now for each image you can update your UI.

//TODO: Multiple file uploadpublic class FileUpload implements Runnable {    Context context;    String uploadApiUrl, uploadFilePath, fileType;    int uploadId;    LocalQueenDataBase localQueenDataBase;    Activity activity;    public FileUpload(Context context, ,String uploadApiUrl, String uploadFilePath, String fileType, int uploadId) {        this.context = context;        this.uploadApiUrl = uploadApiUrl;        this.uploadFilePath = uploadFilePath;        this.fileType = fileType;        this.uploadId = uploadId;        localQueenDataBase = new LocalQueenDataBase(context);        Thread uploader = new Thread(this);        uploader.start();    }    @Override    public void run() {        try {            executeMultipartPost();        } catch (Exception e) {            e.printStackTrace();        }    }    public void executeMultipartPost() throws Exception {        try {            String originalPath = uploadFilePath;            if (uploadFilePath == null) {                uploadFilePath = originalPath;            }            HttpClient httpclient = new DefaultHttpClient();            HttpPost httppost = new HttpPost("your api url");            httppost.addHeader("put your header if required")            FileBody bin = new FileBody(new File(uploadFilePath));            StringBody fileTypeBody = new StringBody(fileType);            StringBody uploadIdBody = new StringBody(uploadId + "");            MultipartEntity reqEntity = new MultipartEntity();            reqEntity.addPart("file", bin);            reqEntity.addPart("fileType", fileTypeBody);            reqEntity.addPart("uploadId", uploadIdBody);            httppost.setEntity(reqEntity);            HttpResponse response = httpclient.execute(httppost);            HttpEntity resEntity = response.getEntity();            String retSrc = EntityUtils.toString(resEntity);//Render your response            //TODO: update your UI for each uploaded image by creating the Handler             Message msg = handler.obtainMessage();             handler.sendMessage(msg);        } catch (Exception e) {            e.printStackTrace();        }    }}final Handler handler = new Handler() {    @Override    public void handleMessage(Message msg) {        try {            uploadGalleryRecyclerAdapter = new UploadGalleryRecyclerAdapter(getApplicationContext(), PostUpdateActivity.this, localQueenDataBase.getGallery());            postUpdateRV.setAdapter(uploadGalleryRecyclerAdapter);            if (localQueenDataBase.getGallery().size() > 3)                gallerylayoutManager.scrollToPosition(localQueenDataBase.getGallery().size() - 2);        } catch (Exception e) {            e.printStackTrace();        }        super.handleMessage(msg);    }};

Hope this will help you.

I highly recommend you to use Square's Tape while your uploading multiple files/images at once looking at the ease of use, efficiency,error handling, queuing system. If you are using only one file at time try to use any of multi-part file upload in any android Http clients

This is what Square's Tape:

Tape is a collection of queue-related classes for Android and Java by Square, Inc.

QueueFile is a lightning-fast, transactional, file-based FIFO. Addition and removal from an instance is an O(1) operation and is atomic. Writes are synchronous; data will be written to disk before an operation returns. The underlying file is structured to survive process and even system crashes and if an I/O exception is thrown during a mutating change, the change is aborted.

An ObjectQueue represents an ordering of arbitrary objects which can be backed either by the filesystem (via QueueFile) or in memory only.

TaskQueue is a special object queue which holds Tasks, objects which have a notion of being executed. Instances are managed by an external executor which prepares and executes enqueued tasks.

enter codepackage com.mohit.mom.multipleimage;import android.annotation.SuppressLint;import android.app.Activity;import android.app.ProgressDialog;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.Bitmap.CompressFormat;import android.graphics.BitmapFactory;import android.os.AsyncTask;import android.os.Bundle;import android.os.StrictMode;import android.util.Log;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.GridView;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.mime.MultipartEntity;import org.apache.http.entity.mime.content.ByteArrayBody;import org.apache.http.entity.mime.content.StringBody;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.protocol.BasicHttpContext;import org.apache.http.protocol.HttpContext;import org.apache.http.util.EntityUtils;import java.io.ByteArrayOutputStream;import java.util.ArrayList;@SuppressLint("NewApi")public class MainActivity extends Activity {    private Button upload, pick;    private ProgressDialog dialog;    MultipartEntity entity;    GridView gv;    int count = 0;    public ArrayList<String> map = new ArrayList<String>();    Bundle b;    TextView noImage;    HttpEntity resEntity;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()                .permitAll().build();        StrictMode.setThreadPolicy(policy);        b = getIntent().getExtras();        noImage = (TextView) findViewById(R.id.noImage);        upload = (Button) findViewById(R.id.btnUpload);        pick = (Button) findViewById(R.id.btnPicture);        gv = (GridView) findViewById(R.id.gridview);        gv.setAdapter(new ImageAdapter(this));        if (b != null)        {            ArrayList<String> ImgData = b.getStringArrayList("IMAGE");            for (int i = 0; i < ImgData.size(); i++)            {                map.add(ImgData.get(i).toString());            }        } else        {            noImage.setVisibility(View.VISIBLE);        }        upload.setOnClickListener(new View.OnClickListener() {            public void onClick(View v)            {                new ImageUploadTask().execute(count + "", "pk" + count + ".jpg");            }        });        pick.setOnClickListener(new View.OnClickListener() {            public void onClick(View v) {                Intent i3 = new Intent(MainActivity.this, UploadActivity.class);                startActivity(i3);            }        });    }    class ImageUploadTask extends AsyncTask<String, Void, String> {        String sResponse = null;        @Override        protected void onPreExecute() {            // TODO Auto-generated method stub            super.onPreExecute();            dialog = ProgressDialog.show(MainActivity.this, "Uploading",                    "Please wait...", true);            dialog.show();        }        @Override        protected String doInBackground(String... params) {            try {                String url = "yours url";                int i = Integer.parseInt(params[0]);                Bitmap bitmap = decodeFile(map.get(i));                HttpClient httpClient = new DefaultHttpClient();                HttpContext localContext = new BasicHttpContext();                HttpPost httpPost = new HttpPost(url);                entity = new MultipartEntity();                ByteArrayOutputStream bos = new ByteArrayOutputStream();                bitmap.compress(CompressFormat.JPEG, 50, bos);                byte[] data = bos.toByteArray();                entity.addPart("user_id", new StringBody("199"));                entity.addPart("club_id", new StringBody("10"));                entity.addPart("club_image", new ByteArrayBody(data,                        "image/jpeg", params[1]));                httpPost.setEntity(entity);                HttpResponse response = httpClient.execute(httpPost);                resEntity = response.getEntity();                sResponse = EntityUtils.toString(resEntity);                //HttpResponse response = httpClient.execute(httpPost,localContext);                //sResponse = EntityUtils.getContentCharSet(response.getEntity());                System.out.println("sResponse : " + sResponse);            } catch (Exception e) {                if (dialog.isShowing())                    dialog.dismiss();                Log.e(e.getClass().getName(), e.getMessage(), e);            }            return sResponse;        }        @Override        protected void onPostExecute(String sResponse) {            try {                if (dialog.isShowing())                    dialog.dismiss();                if (sResponse != null) {                    Toast.makeText(getApplicationContext(),                            sResponse + " Photo uploaded successfully",                            Toast.LENGTH_SHORT).show();                    count++;                    if (count < map.size()) {                        new ImageUploadTask().execute(count + "", "hm" + count                                + ".jpg");                    }                }            } catch (Exception e) {                Toast.makeText(getApplicationContext(), e.getMessage(),                        Toast.LENGTH_LONG).show();                Log.e(e.getClass().getName(), e.getMessage(), e);            }        }    }    public Bitmap decodeFile(String filePath) {// Decode image size        BitmapFactory.Options o = new BitmapFactory.Options();        o.inJustDecodeBounds = true;        BitmapFactory.decodeFile(filePath, o);// The new size we want to scale to        final int REQUIRED_SIZE = 1024;// Find the correct scale value. It should be the power of 2.        int width_tmp = o.outWidth, height_tmp = o.outHeight;        int scale = 1;        while (true) {            if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)                break;            width_tmp /= 2;            height_tmp /= 2;            scale *= 2;        }        BitmapFactory.Options o2 = new BitmapFactory.Options();        o2.inSampleSize = scale;        Bitmap bitmap = BitmapFactory.decodeFile(filePath, o2);        return bitmap;    }    private class ImageAdapter extends BaseAdapter    {        private Context mContext;        public ImageAdapter(Context c)        {            mContext = c;        }        public int getCount()        {            return map.size();        }        public Object getItem(int position)        {            return null;        }        // create a new ImageView for each item referenced by the Adapter        public View getView(int position, View convertView, ViewGroup parent) {            ImageView imageView;            if (convertView == null)            { // if it's not recycled, initialize some                // attributes                imageView = new ImageView(mContext);                imageView.setLayoutParams(new GridView.LayoutParams(85, 85,                        Gravity.CENTER));                imageView.setScaleType(ImageView.ScaleType.FIT_XY);                imageView.setPadding(1, 1, 1, 1);            }            else            {                imageView = (ImageView) convertView;            }            //Bitmap bm=BitmapFactory.decodeFile(map.get(position));            final BitmapFactory.Options options = new BitmapFactory.Options();            options.inSampleSize = 8;            Bitmap bmp = BitmapFactory.decodeFile(map.get(position),options);            imageView.setImageBitmap(bmp);            return imageView;        }        @Override        public long getItemId(int position) {            // TODO Auto-generated method stub            return 0;        }    }    @Override    public void onBackPressed() {// TODO Auto-generated method stub        super.onBackPressed();        MainActivity.this.finish();    }}