screenshot

private class MyTask extends AsyncTask<Void, Void, Bitmap>{
        @SuppressWarnings("deprecation")
        @Override
        protected void onPostExecute(Bitmap result) {
            if(bitmap!=null){
                iv=(ImageView) findViewById(R.id.screenView);
                ob=new BitmapDrawable(getResources(),bitmap);
                iv.setBackgroundDrawable(ob);
            }else{
                Log.d("Bitmap null","Empty");
            }
            MyTask task=new MyTask();
            task.execute();
        }

        @Override
        protected Bitmap doInBackground(Void... arg0){
            try {
                ObjectInputStream ois=new ObjectInputStream(client.getInputStream());
                byte[] buffer=(byte[]) ois.readObject();
                BitmapFactory.Options options=new BitmapFactory.Options();
                options.inMutable=true;
                bitmap = BitmapFactory.decodeByteArray(buffer, 0, buffer.length,options);
                return bitmap;
            } catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
            return null;
        }
    }