Code

//this is how I assigned an image to image view
@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data)
        {
            selected_image = data.getData();
            String[] filePath= {MediaStore.Images.Media.DATA};
            cursor = getContentResolver().query(selected_image, filePath, null, null, null);
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndex(filePath[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();

            /*get width and height to rescaled*/
            original_image = BitmapFactory.decodeFile(picturePath);
            int width = original_image.getWidth();
            int height = original_image.getHeight();
            int newWidth = width / 2;
            int newHeight = height / 2;
            Log.i("Before Scale", "Width = " + width + ", Height = " + height);
            Log.i("After Scale", "Width = " + newWidth + ", Height = " + newHeight);

            /*scaling image*/
            BitmapFactory.Options image_size = new BitmapFactory.Options();
            original_image.recycle();
            imageUpload = Bitmap.createScaledBitmap(BitmapFactory.decodeFile(picturePath, image_size), newWidth, newHeight, false);
            baos = new ByteArrayOutputStream();

            if(original_image.isRecycled() == true)
            {
                Log.i("I", "True");
            }

            if(image.getDrawable() == null)
            {
                image.setImageBitmap(imageUpload);
                imageUpload.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                image_data_1 = baos.toByteArray();
                encoded_image_1 = Base64.encodeBytes(image_data_1);
            }
            else if(image2.getDrawable() == null)
            {
                image2.setImageBitmap(imageUpload);
                imageUpload.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                image_data_2 = baos.toByteArray();
                encoded_image_2 = Base64.encodeBytes(image_data_2);
            }
            else if(image3.getDrawable() == null)
            {
                image3.setImageBitmap(imageUpload);
                imageUpload.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                image_data_3 = baos.toByteArray();
                encoded_image_3 = Base64.encodeBytes(image_data_3);
            }
            else if(image4.getDrawable() == null)
            {
                image4.setImageBitmap(imageUpload);
                imageUpload.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                image_data_4 = baos.toByteArray();
                encoded_image_4 = Base64.encodeBytes(image_data_4);
            }
            else if(image5.getDrawable() == null)
            {
                image5.setImageBitmap(imageUpload);
                imageUpload.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                image_data_5 = baos.toByteArray();
                encoded_image_5 = Base64.encodeBytes(image_data_5);
            }
            else if(image6.getDrawable() == null)
            {
                image6.setImageBitmap(imageUpload);
                imageUpload.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                image_data_6 = baos.toByteArray();
                encoded_image_6 = Base64.encodeBytes(image_data_6);
            }
        }

//remove image
remove.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(image6.getDrawable() != null)
                {
                    image6.setImageBitmap(null);
                    image_data_6 = null;
                }
                else if(image5.getDrawable() != null)
                {
                    image5.setImageBitmap(null);
                    image_data_5 = null;
                }
                else if(image4.getDrawable() != null)
                {
                    image4.setImageBitmap(null);
                    image_data_4 = null;
                }
                else if(image3.getDrawable() != null)
                {
                    image3.setImageBitmap(null);
                    image_data_3 = null;
                }
                else if(image2.getDrawable() != null)
                {
                    image2.setImageBitmap(null);
                    image_data_2 = null;
                }
                else if(image.getDrawable() != null)
                {
                    image.setImageBitmap(null);
                    image_data_1 = null;
                }
            }
        });