zoukankan      html  css  js  c++  java
  • Android StateListDrawable的坑

    有问题的代码:

            StateListDrawable background = new StateListDrawable();
            CircleDrawable pressedDrawable = new CircleDrawable(PluginRely.getColor(R.color.button_pressed));
            CircleDrawable drawable = new CircleDrawable(PluginRely.getColor(R.color.button_unpressed));
            background.addState(new int[]{android.R.attr.state_pressed},pressedDrawable);
            background.addState(new int[]{}, drawable);
            mIvPlay.setBackgroundDrawable(background);
            mIvPlayStop.setBackgroundDrawable(background);
    

    没问题的代码:

            StateListDrawable background = new StateListDrawable();
            StateListDrawable background2 = new StateListDrawable();
            CircleDrawable pressedDrawable = new CircleDrawable(PluginRely.getColor(R.color.button_pressed));
            CircleDrawable drawable = new CircleDrawable(PluginRely.getColor(R.color.button_unpressed));
            background.addState(new int[]{android.R.attr.state_pressed},pressedDrawable);
            background.addState(new int[]{}, drawable);
    
            background2.addState(new int[]{android.R.attr.state_pressed},pressedDrawable);
            background2.addState(new int[]{}, drawable);
            mIvPlay.setBackgroundDrawable(background);
            mIvPlayStop.setBackgroundDrawable(background2);
    

    有问题的代码,会导致,mIvPlay mIvPlayStop 两个ImageView 的点击状态混乱,明明不是按下态,却显示的是按下态的图片。所以,不要省事。两个ImageView 在代码里面,不可以公用同一个StateListDrawable 对象!

  • 相关阅读:
    C++primer习题3.13
    Indesign技巧
    《转载》虚函数在对象中的内存布局
    C++new失败后如何处理
    sizeof的用法
    转载 C++中虚继承防止二义性
    字符串反转
    回文写法
    C++术语
    QT+VS2008
  • 原文地址:https://www.cnblogs.com/caoxinyu/p/10568528.html
Copyright © 2011-2022 走看看