新手，如何重绘RelativeLayout？

[loskill]

我自己写了个类继承RelativeLayout
public class ClientLayout extends RelativeLayout
{
public ClientLayout(Context context)
{
super(context);
}

public ClientLayout(Context context, AttributeSet attrs)
{
super(context, attrs);
}

@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
Paint paint=new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.RED);
canvas.drawRect(0, 0, 100, 100, paint);
}
}
然后再Activity中创建。
ClientLayout layout=new ClientLayout(this);
layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
setContentView(layout);
可是无法画出红色的矩形来啊，从View继承就可以画出来，这是为什么啊？

[yyy025025025]

@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
Paint paint=new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.RED);
canvas.drawRect(0, 0, 100, 100, paint);
}

尝试把这段放在dispatchDraw里面。

[yyy025025025]

@Override
protected void dispatchDraw(Canvas canvas)
{
super.dispatchDraw(canvas);
Paint paint=new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.RED);
canvas.drawRect(0, 0, 100, 100, paint);
}

onDraw没有跑到。

[loskill]

果真是要放到dispatchDraw里啊

[yuruizhuyuan]

自己继承这个类后，怎么处理焦点呢？