نمایش Toast درصورت خالی بودن Image View

آدرس فایل رو چک میکنیم

      int filePath = "";
     @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == SELECT_IMAGE  &&  resultCode == RESULT_OK  && data != null){
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            filePath = cursor.getString(columnIndex);            
            cursor.close();
            if(!filePath.equals("")){                
                Bitmap bitmap = BitmapFactory.decodeFile(filePath);
                imageView.setImageBitmap(bitmap);
            } else if (filePath.equals("")){
                Toast.makeText(this,"No image selected",Toast.LENGTH_SHORT).show();
            }               
        }
    }