Android 如何为3种不同的状态设置按钮样式

我正在尝试创建我自己版本的Simon says。我想为按钮创建三种状态（颜色）；关闭（假），闪烁按下（真）。如果我使用

mButton1.setbackgroundColor（Color.Red）

我将丢失XML按钮样式。如何做到这一点而不丢失XML样式，或者是否有更好的方法来设置按钮的样式

您可以在

drawable

目录中创建

按钮选择器

xml，如下所示。它定义了当按钮处于不同状态时要使用的不同可绘制项，例如：默认、按下等

drawable/my\u button\u selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- pressed -->
    <item android:state_pressed="true" android:drawable="@drawable/my_button_pressed" />

    <!-- focused -->
    <item android:state_focused="true" android:drawable="@drawable/my_button_pressed" />

    <!-- selected -->
    <item android:state_selected="true" android:drawable="@drawable/my_button_pressed" />

    <!-- default -->
    <item android:drawable="@drawable/my_button_default" />
</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- define this color in your colors.xml  -->
    <solid android:color="@color/default_button_color"/>

    <!-- this makes the rounded corners button -->
    <corners android:radius="5dp" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- define this color in your colors.xml  -->
    <solid android:color="@color/pressed_button_color"/>

    <corners android:radius="5dp" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/ripple_material_light">

    <item android:id="@android:id/mask">
        <shape android:shape="rectangle">
            <solid android:color="@android:color/white" />
            <corners android:radius="5dp" />
        </shape>
    </item>

    <item android:drawable="@drawable/my_button_default" />
</ripple>

drawable/my_button_pressed.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- pressed -->
    <item android:state_pressed="true" android:drawable="@drawable/my_button_pressed" />

    <!-- focused -->
    <item android:state_focused="true" android:drawable="@drawable/my_button_pressed" />

    <!-- selected -->
    <item android:state_selected="true" android:drawable="@drawable/my_button_pressed" />

    <!-- default -->
    <item android:drawable="@drawable/my_button_default" />
</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- define this color in your colors.xml  -->
    <solid android:color="@color/default_button_color"/>

    <!-- this makes the rounded corners button -->
    <corners android:radius="5dp" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- define this color in your colors.xml  -->
    <solid android:color="@color/pressed_button_color"/>

    <corners android:radius="5dp" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/ripple_material_light">

    <item android:id="@android:id/mask">
        <shape android:shape="rectangle">
            <solid android:color="@android:color/white" />
            <corners android:radius="5dp" />
        </shape>
    </item>

    <item android:drawable="@drawable/my_button_default" />
</ripple>

请注意，对于

API级别21或更高级别的
，可以使用默认的
ripple
效果。将下面的
my_button_selector.xml
放在
drawable-v21
目录下：

drawable-v21/my_button_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- pressed -->
    <item android:state_pressed="true" android:drawable="@drawable/my_button_pressed" />

    <!-- focused -->
    <item android:state_focused="true" android:drawable="@drawable/my_button_pressed" />

    <!-- selected -->
    <item android:state_selected="true" android:drawable="@drawable/my_button_pressed" />

    <!-- default -->
    <item android:drawable="@drawable/my_button_default" />
</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- define this color in your colors.xml  -->
    <solid android:color="@color/default_button_color"/>

    <!-- this makes the rounded corners button -->
    <corners android:radius="5dp" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- define this color in your colors.xml  -->
    <solid android:color="@color/pressed_button_color"/>

    <corners android:radius="5dp" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/ripple_material_light">

    <item android:id="@android:id/mask">
        <shape android:shape="rectangle">
            <solid android:color="@android:color/white" />
            <corners android:radius="5dp" />
        </shape>
    </item>

    <item android:drawable="@drawable/my_button_default" />
</ripple>



有了这个，Android将使用
v21/my_button\u selector.xml
作为
API级别21或更高的
。对于低于该级别的API，它使用
drawable/my_button\u selector.xml
使用
选择器。