先上两张图压压惊：

如图，带虚拟键的华为手机，图片内容是用SurfaceView画出的背景和一个大圆，一个小圆（转盘），调出虚拟键进入打开正常如下图1，关闭虚拟键如下图2

关闭虚拟键进入打开如下图1，打开虚拟键如下图2

接下来是代码，个人感觉没什么问题

//初始化盘块绘制的范围 mRange = new RectF(mPadding, getMeasuredHeight()/2-mRadius/2, mPadding + mRadius, getMeasuredHeight()/2+mRadius/2);

/** * 绘制背景 */ private void drawBg() { mCanvas.drawColor(Color.TRANSPARENT); mCanvas.drawBitmap(mBackgoundBitmap,0,0,null); mCanvas.drawBitmap(mBgBitmap, null, new Rect(mPadding/3, (getMeasuredHeight()/2-(getMeasuredWidth()-2*mPadding/3)/2), getMeasuredWidth() - mPadding/3, (getMeasuredHeight()/2+(getMeasuredWidth()-2*mPadding/3)/2)), null); }

public void draw() { try { mCanvas = mHolder.lockCanvas(); if (mCanvas != null) { //绘制背景 drawBg(); //绘制盘块 float tmpAngle = mStartAngle; float sweepAngle = 360 / mItemCount; for (int i = 0; i < mItemCount; i++) { mArcPaint.setColor(mColors[i]); //绘制盘块 mCanvas.drawArc(mRange, tmpAngle, sweepAngle, true, mArcPaint); //绘制文本 drawText(tmpAngle, sweepAngle, mStrs[i]); //绘制Icon drawIcon(tmpAngle, mImgsBitmap[i]); tmpAngle += sweepAngle; }

疑问：draw()方法是只要SurfaceView没被销毁就一直在执行不断重绘的，从图片可以看出，当把虚拟键关闭的时候，drawBg()画背景和大圆盘的方法是执行了的，但是下面画转盘的代码为什么没执行？该如何解决？