修改Switch 的颜色

1：效果图

2：布局

<Switch
    android:id="@+id/switch_bg"
    style="@style/switchStyle"
    android:layout_width="30dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:checked="false"
    android:switchMinWidth="52dp" />

3：switchStyle

<style name="switchStyle">
    <item name="android:layout_height">wrap_content</item>
    <item name="android:layout_width">wrap_content</item>
    <item name="android:textOff">""</item>
    <item name="android:textOn">""</item>
    <item name="android:thumb">@drawable/switch_thumb</item>
    <item name="android:thumbTextPadding">10dp</item>
    <item name="android:track">@drawable/switch_track</item>
</style>

4： switch_thumb

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="true" android:drawable="@drawable/abc_btn_switch_to_on_mtrl_00012" />
    <item android:drawable="@drawable/abc_btn_switch_to_on_mtrl_00001" />
</selector>

5： switch_track

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item  android:state_checked="true" >
        <shape xmlns:android="http://schemas.android.com/apk/res/android">
            <size android:width="@dimen/switch_w"
                android:height="@dimen/switch_h"/>
            <solid android:color="@color/colorDefaultThemeGreen"/>
            <corners android:radius="@dimen/switch_r"/>
        </shape>
    </item>

    <item  android:state_checked="false" >
        <shape xmlns:android="http://schemas.android.com/apk/res/android">
            <size android:width="@dimen/switch_w"
                android:height="@dimen/switch_h"/>
            <solid android:color="@color/colorGray"/>
            <corners android:radius="@dimen/switch_r"/>
        </shape>
    </item>


</selector>

6：实现方法

  private void setSwitchColor(Switch switch_bg,int color){
        StateListDrawable stateListDrawable = (StateListDrawable) switch_bg.getTrackDrawable();

        try {
            Class stateListDrawableClass = StateListDrawable.class;
            Method getStateCountMethod = stateListDrawableClass.getDeclaredMethod("getStateCount", new Class[0]);
            Method getStateSetMethod = stateListDrawableClass.getDeclaredMethod("getStateSet", int.class);
            Method getDrawableMethod = stateListDrawableClass.getDeclaredMethod("getStateDrawable", int.class);
            int count = (Integer) getStateCountMethod.invoke(stateListDrawable, new Object[]{});
            Log.d("Tag:", "setSwitchColor: --count:  "+count);
            for (int i = 0; i < count; i++) {
                int[] stateSet = (int[]) getStateSetMethod.invoke(stateListDrawable, 0);
                if (stateSet == null || stateSet.length == 0) {
                    GradientDrawable drawable = (GradientDrawable) getDrawableMethod.invoke(stateListDrawable, i);
                    drawable.setColor(color);
                } else {
                    Log.d("Tag:", "setSwitchColor:length: "+stateSet.length);
                    for (int j = 0; j < stateSet.length; j++) {
                        Log.d("Tag:", "setSwitchColor: "+stateSet[j]);
                        if(stateSet[j]==android.R.attr.state_checked){
                            Drawable drawable = (Drawable) getDrawableMethod.invoke(stateListDrawable, j);
                            drawable.setColorFilter(color, PorterDuff.Mode.SRC_ATOP);
                        }else {
                            Drawable drawable = (Drawable) getDrawableMethod.invoke(stateListDrawable, j);
                            drawable.setColorFilter(Color.RED, PorterDuff.Mode.SRC_ATOP);
                        }

                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

　7：code　

链接: https://pan.baidu.com/s/1h-KzOa-_mOrqlsSMqttZKQ 密码: i9uh

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