ShapeDrawable重绘View的例子
直接上段代码吧:

public class CustomDrawableView extends View {private ShapeDrawable mDrawable;public CustomDrawableView(Context context) {super(context);int x = 10;int y = 10;int width = 300;int height = 50;                //通过传参可以绘制不同的图形mDrawable = new ShapeDrawable(new OvalShape());mDrawable.getPaint().setColor(0xff74AC23);mDrawable.setBounds(x, y, x + width, y + height);}protected void onDraw(Canvas canvas) {mDrawable.draw(canvas);}}