m107119232的专栏

在动态代码里面写//渐变透明度动画效果 AlphaAnimation alphaAnimation=new AlphaAnimation(0.0f, 1.0f); alphaAnimation.setDuration(1000); view.startAnimation(alphaAnimation);创建 alpha_style.xml<?xml version

/** * 设置画笔 */ private void initPaint() { mPaint=new Paint(); mPaint.setColor(Color.RED); mPaint.setAntiAlias(true); mPaint.setStyle(Style.FILL);