android NavigationView改变item的背景色

NavigationView布局
<android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="@dimen/navigationView_width"
        android:layout_height="match_parent"
        android:layout_gravity="end"
        android:fitsSystemWindows="true"
        android:background="@color/nav_item_bg"
        app:itemBackground="@drawable/nav_item_selector"
        app:headerLayout="@layout/nav_header_main"
        app:itemTextAppearance="@style/itemTextAppearance"
        app:menu="@menu/activity_main_drawer"/>
        
app:itemBackground="@drawable/nav_item_selector" 加上这句就可以了。

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

    <item android:state_pressed="true">
        <shape>
            <solid android:color="@color/item_selected_bg"/>
        </shape>
    </item>

    <item android:state_focused="true">
        <shape>
            <solid android:color="@color/item_selected_bg"/>
        </shape>
    </item>

    <item android:state_pressed="false">
        <shape>
            <solid android:color="@color/nav_item_bg"/> //填充的颜色
        </shape>
    </item>

</selector>