由网友(与爱意搭讪)分享简介：我定义的类这样的：public class TestMyFrameLayout extends FrameLayout{Paint mPaint;public TestMyFrameLayout(Context context, AttributeSet attrs) {super(context, attrs);}...

我定义的类这样的：

public class TestMyFrameLayout extends FrameLayout{

    Paint mPaint;
    public TestMyFrameLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public TestMyFrameLayout(Context context) {
        super(context);
        mPaint = new Paint();
        mPaint.setColor(Color.GREEN);
    }

    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(50f, 50f, 30, mPaint);
    }   
}

和称它想：

TestMyFrameLayout myFrameLayout = new TestMyFrameLayout(this);
LayoutParams myFrameLayoutParams = new LayoutParams(300,300);
myFrameLayout.setLayoutParams(myFrameLayoutParams);
setContentView(myFrameLayout);

但事实上TestMyFrameLayout.onDraw（帆布油画）函数不获取调用，为什么呢？

But In fact TestMyFrameLayout.onDraw(Canvas canvas) function not getting called, why?

推荐答案

解决。加 this.setWillNotDraw（假）; 在构造