<Switch
    android:id="@+id/s_v"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:switchMinWidth="20dp"
    android:textOn="on"
    android:textOff="off"
    android:thumb="@drawable/thumb"
    android:track="@drawable/track" />

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

  <!-- 高度40 -->
  <size android:height="40dp" android:width="40dp"/>
  <!-- 圆角弧度 20 -->
  <corners android:radius="20dp"/>

  <!-- 变化率 -->
  <gradient
    android:endColor="#ffffff"
    android:startColor="#ffffff" />

  <stroke android:width="1dp"
    android:color="#9e9e9e"/>

</shape>

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

  <!-- 高度40 -->
  <size android:height="40dp" android:width="40dp"/>
  <!-- 圆角弧度 20 -->
  <corners android:radius="20dp"/>

  <!-- 变化率 -->
  <gradient
    android:endColor="#ffffff"
    android:startColor="#ffffff" />

  <stroke android:width="1dp"
    android:color="#33da33"/>

</shape>

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

  <!-- 高度  此处设置宽度无效-->
  <size android:height="20dp"/>
  <!-- 圆角弧度 15 -->
  <corners android:radius="25dp"/>

  <!-- 变化率 定义从左到右的颜色不变 -->
  <gradient
    android:endColor="#9e9e9e"
    android:startColor="#9e9e9e" />

</shape>

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

  <!-- 高度40 -->
  <size android:height="20dp"/>
  <!-- 圆角弧度 20 -->
  <corners android:radius="25dp"/>

  <!-- 变化率 -->
  <gradient
    android:endColor="#33da33"
    android:startColor="#33da33" />

</shape>

<?xml version="1.0" encoding="utf-8"?>
<!-- 设置按钮在不同状态下的时候，按钮不同的颜色 -->
<selector xmlns:android="http://schemas.android.com/apk/res/android" >

  <item android:state_checked="true" android:drawable="@drawable/green_thumb" />
  <item android:drawable="@drawable/gray_thumb" />

</selector>

<?xml version="1.0" encoding="utf-8"?>
<!-- 控制Switch在不同状态下，底下下滑条的颜色 -->
<selector xmlns:android="http://schemas.android.com/apk/res/android" >

  <item android:state_checked="true" android:drawable="@drawable/green_track" />
  <item android:drawable="@drawable/gray_track" />

</selector>

<style name="s_true" parent="@android:style/TextAppearance.Small">
  <item name="android:textColor">#33da33</item>
</style>

<style name="s_false" parent="@android:style/TextAppearance.Small">
  <item name="android:textColor">#9b9b9b</item>
</style>

public class MainActivity extends Activity{

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final Switch aSwitch = (Switch) findViewById(R.id.s_v);
    aSwitch.setChecked(false);
    aSwitch.setSwitchTextAppearance(MainActivity.this,R.style.x1);
    aSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        //控制开关字体颜色
        if (b) {
          aSwitch.setSwitchTextAppearance(MainActivity.this,R.style.s_true);
        }else {
          aSwitch.setSwitchTextAppearance(MainActivity.this,R.style.x1);
        }
      }
    });
  }
}