Android開發 StateListDrawable詳解

前言

　　StateListDrawable是與xml中的selector屬性對應代碼實現類,它需要配合GradientDrawable的使用,如果你還不了解GradientDrawable可以參考我的另一篇博客:https://www.cnblogs.com/guanxinjing/p/11142599.html

配置對照表

android:state_pressed=["true" | "false"]  按下狀態
android:state_focused=["true" | "false"]  聚焦狀態
android:state_selected=["true" | "false"]  選中狀態
android:state_active=["true" | "false"]  激活狀態
android:state_checkable=["true" | "false"]   可校驗狀態
android:state_checked=["true" | "false"]   檢查狀態
android:state_enabled=["true" | "false"]  啟用狀態
android:state_window_focused=["true" | "false"]   狀態欄聚焦狀態

點擊效果demo

 

        GradientDrawable drawableRed = new GradientDrawable();
        drawableRed.setShape(GradientDrawable.RECTANGLE);
        drawableRed.setColor(Color.RED);

        GradientDrawable drawableBlue = new GradientDrawable();
        drawableBlue.setShape(GradientDrawable.RECTANGLE);
        drawableBlue.setColor(Color.BLUE);

        int pressed =  android.R.attr.state_pressed;
        StateListDrawable stateListDrawable = new StateListDrawable();
        stateListDrawable.addState(new int[]{pressed}, drawableRed);
        stateListDrawable.addState(new int[]{-pressed}, drawableBlue);
        btn1.setBackground(stateListDrawable);

 

效果圖: