我将如何在 NavigationDrawer 中创建标签指示器？

Question

如何创建这样的导航绘制标签指示器？ NavigationDrawer class 是否有像 TabLayout 这样的指标？

Answer 1

您可以定义一个带有左边框的自定义可绘制对象并将其设置为所选项目的背景。按照下面给出的步骤，

Step 1: Define a drawable with left border(selected_item.xml) in drawables

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape android:shape="rectangle">
        <solid android:color="#000000" />
    </shape>
</item>
<item android:left="2dp">
    <shape android:shape="rectangle">
        <solid android:color="#FF0000" />
    </shape>
</item>
</layer-list>

Step 2: Define a selector(navi_selector.xml) in drawables

<?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/selected_item"/>
    <item android:state_pressed="true" android:drawable="#000000"/>

</selector>

Step 3: set the navi_selector for app:itemBackground

 <android.support.design.widget.NavigationView
        app:itemTextColor="@android:color/white"
        android:fitsSystemWindows="true"
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:menu="@menu/activity_main_drawer"
        android:background="#000000"
        app:itemBackground="@drawable/navi_selector"/>

我将如何在 NavigationDrawer 中创建标签指示器？

How would I create a tab indicator in NavigationDrawer?

android

navigation-drawer