标签:android oid res 图标 过滤 class not mutate and
主要涉及两个技术点:
1、图标加灰色过滤;
2、Android的图片资源默认是静态的,单实例;如果两个IM好友的头像一样,最简单的都是用的软件自带头像,有一个在线,一个离线,直接改变头像的灰度,则两个用户的头像都会变灰或者在线,答案是:Drawable.mutate()。
代码如下:
Drawable mDrawable = context.getResources().getDrawable(R.drawable.face_icon); //Make this drawable mutable. //A mutable drawable is guaranteed to not share its state with any other drawable. mDrawable.mutate(); ColorMatrix cm = new ColorMatrix(); cm.setSaturation(0); ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm); mDrawable.setColorFilter(cf);
标签:android oid res 图标 过滤 class not mutate and
原文地址:http://www.cnblogs.com/ganchuanpu/p/6771536.html