Copy *.png image and paste to drawable folder.
After adding the image, you can use the added image asset in code:
You can either add image by using xml file
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/image_name" />
OR You can set image by using program:
ImageView iv = (ImageView)findViewById(v);
iv.setImageResource(R.drawable.image_name);