一个android的按钮
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<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="https://schemas.android.com/apk/res/android">
<item android:state_pressed="true"><shape>
<!-- 描边 -->
<stroke android:width="1dp" android:color="@android:color/transparent" />
<!-- 圆角 -->
<corners android:radius="5dp" />
<!-- 填充 -->
<solid android:color="#56F391" />
</shape></item>
<item android:state_checked="true"><shape>
<!-- 描边 -->
<stroke android:width="1dp" android:color="@android:color/transparent" />
<!-- 圆角 -->
<corners android:radius="5dp" />
<!-- 填充 -->
<solid android:color="#56F391" />
</shape></item>
<item android:state_focused="true"><shape>
<!-- 描边 -->
<stroke android:width="1dp" android:color="@android:color/transparent" />
<!-- 圆角 -->
<corners android:radius="5dp" />
<!-- 填充 -->
<solid android:color="#56F391" />
</shape></item>
<item><shape>
<!-- 圆角 -->
<corners android:radius="5dp" />
<!-- 填充 -->
<solid android:color="#4BB26D" />
</shape></item>
</selector>
//颜色渐变的一条直线
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="https://schemas.android.com/apk/res/android">
<gradient
android:startColor="#FFeeeeee"
android:centerColor="#FF111111"
android:endColor="#FFeeeeee"/>
</shape><?xml version="1.0" encoding="utf-8"?>
<selector x
