ShapeDrawable插件LinearLayout不能无用

Question

我已经创建了DotView扩展View，例如：

 private ShapeDrawable mDrawable = new ShapeDrawable(new OvalShape());

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    mWidth = getWidth();
    mHeight = getHeight();

    if(mWidth>=mHeight){
        circleDiameter=mHeight/3;
    }else{
        circleDiameter=mWidth/3;
    }

    left = (mWidth - circleDiameter) / 2;
    top = (mHeight - circleDiameter) / 2;
    right = left + circleDiameter;
    bottom = top + circleDiameter;

    super.onMeasure (widthMeasureSpec, heightMeasureSpec);
}

@Override
protected void onDraw(Canvas canvas) {
    canvas.drawColor(Color.WHITE);
    canvas.drawLine(0, 0, this.getWidth() - 1, 0, paint);
    canvas.drawLine (0, 0, 0, this.getHeight () - 1, paint);
    canvas.drawLine(this.getWidth() - 1, 0, this.getWidth() - 1, this.getHeight() - 1, paint);
    canvas.drawLine(0, this.getHeight() - 1, this.getWidth() - 1, this.getHeight() - 1, paint);
    mDrawable.setBounds (left, top, right, bottom);
    mDrawable.getPaint().setColor (Color.BLACK);
    mDrawable.draw (canvas);
}

只需在xml中使用DotView即可显示：

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然后我创建一个PasswordBox扩展LinearLayout并添加六个DotView

 private int mPwdSize = 6;

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure (widthMeasureSpec, heightMeasureSpec);
    setOrientation (HORIZONTAL);
    for(int i = 0; i < mPwdSize; i++) {
        DotView dotView = new DotView (getContext ());
        LayoutParams layoutParams = new LayoutParams (getWidth ()/6,getHeight ());
        addView (dotView, layoutParams);
    }
}

但是它不起作用！ShapeDrawable无法显示。看图片：

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我不知道代码在哪里出了问题，请帮助me.thanks。

Answer 1

我解决了这个问题。太愚蠢了，应该使用getMeasuredWidth()，getWidth()是0