介绍两个Android不常用的Drawable：GradientDrawable和 StateListDrawable

最新推荐文章于 2025-09-05 16:34:31 发布

转载最新推荐文章于 2025-09-05 16:34:31 发布 · 94 阅读

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原文链接：http://www.cnblogs.com/tinyclear/p/6102844.html

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#移动开发

本文介绍如何使用GradientDrawable自定义视图的颜色和圆角，并利用StateListDrawable实现不同状态下的视图样式变化。

//---------------------------------------------------------------------------------------------------------------------------------  
/*--------------- normalDrawable begin ---------------*/
            GradientDrawable normalDrawable = new GradientDrawable();
            // 得到随机颜色
            Random random = new Random();
            int alpha = 255;
            int green = random.nextInt(190) + 30; // 30-220
            int red = random.nextInt(190) + 30;// 30-220
            int blue = random.nextInt(190) + 30;// 30-220
            int argb = Color.argb(alpha, red, green, blue);
            // 设置填充颜色
            normalDrawable.setColor(argb);

            // 设置圆角半径
            normalDrawable.setCornerRadius(UIUtils.dip2Px(6));
            /*--------------- normalDrawable end ---------------*/
//-----------------------------------------------------------------------------------------------------------------------------------------------
/*--------------- pressedDrawable begin ---------------*/
            GradientDrawable pressedDrawable = new GradientDrawable();
            pressedDrawable.setColor(Color.DKGRAY);
            pressedDrawable.setCornerRadius(UIUtils.dip2Px(6));
            /*--------------- pressedDrawable end ---------------*/
//-------------------------------------------------------------------------------------------------------------------------------------------
            // 设置一个状态图片
            StateListDrawable stateListDrawable = new StateListDrawable();
            // @attr ref android.R.styleable#DrawableStates_state_pressed
            stateListDrawable.addState(new int[] { android.R.attr.state_pressed }, pressedDrawable);
            stateListDrawable.addState(new int[] {}, normalDrawable);