不從導航視圖突出顯示所選子項

Question

我里面有一個NavigationView和渲染菜單。 我的菜單有3組，每組包含很少的子菜單項。 我的問題是，當我選擇任何子菜單項並轉到特定片段時。 但是，當我重新打開NavigationView /抽屜以選擇另一個項目時，它不會顯示上次選擇的項目突出顯示。

目前，它只是更改所選子菜單項的顏色，但我希望它突出顯示如下快照。

基本活動XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_app_base"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_app_base"
        app:menu="@menu/activity_app_base_drawer"
        android:background="@color/white"
        app:itemBackground="@color/white" />

</android.support.v4.widget.DrawerLayout>

菜單項XML（activity_app_base_drawer）

<item
    android:id="@+id/nav_android_title"
    android:title="Android" >
    <menu>
        <group android:checkableBehavior="single">
        <item
            android:id="@+id/nav_android_best_practices"
            android:icon="@drawable/best_practices_icon"
            android:checked="false"
            android:title="Best Practices" />
        <item
            android:id="@+id/nav_android_monthly_report"
            android:icon="@drawable/report_icon"
            android:checked="false"
            android:title="Monthly Report" />
        </group>
    </menu>
</item>
<item
    android:id="@+id/nav_iOS_title"
    android:title="iOS">
    <menu>
        <group android:checkableBehavior="single">
        <item
            android:id="@+id/nav_ios_best_practices"
            android:icon="@drawable/best_practices_icon"
            android:checked="false"
            android:title="Best Practices" />
        <item
            android:id="@+id/nav_ios_monthly_report"
            android:icon="@drawable/report_icon"
            android:checked="false"
            android:title="Monthly Report" />
        </group>
    </menu>
</item>
<item
    android:id="@+id/nav_communicate_title"
    android:title="Other">
    <menu>
        <group android:checkableBehavior="single">
        <item
            android:id="@+id/nav_terms"
            android:icon="@drawable/terms_icon"
            android:checked="false"
            android:title="Terms &amp; Conditions" />
        <item
            android:id="@+id/nav_about_us"
            android:icon="@drawable/about_icon"
            android:checked="false"
            android:title="About Us" />
        </group>
    </menu>
</item>

Answer 1

您可以定義為使用Android的各個菜單項的可檢查的行為：在元素可檢查屬性，或者要與Android整個組：在checkableBehavior屬性element.so把checkableBehavior主菜單

<menu>
<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_android_title"
        android:title="Android" >
        <menu>
            <group android:checkableBehavior="single">
                <item
                    android:id="@+id/nav_android_best_practices"
                    android:icon="@drawable/best_practices_icon"
                    android:checked="false"
                    android:title="Best Practices" />
                <item
                    android:id="@+id/nav_android_monthly_report"
                    android:icon="@drawable/report_icon"
                    android:checked="false"
                    android:title="Monthly Report" />
            </group>
        </menu>
    </item>
    <item
        android:id="@+id/nav_iOS_title"
        android:title="iOS">
        <menu>
            <group android:checkableBehavior="single">
                <item
                    android:id="@+id/nav_ios_best_practices"
                    android:icon="@drawable/best_practices_icon"
                    android:checked="false"
                    android:title="Best Practices" />
                <item
                    android:id="@+id/nav_ios_monthly_report"
                    android:icon="@drawable/report_icon"
                    android:checked="false"
                    android:title="Monthly Report" />
            </group>
        </menu>
    </item>
    <item
        android:id="@+id/nav_communicate_title"
        android:title="Other">
        <menu>
            <group android:checkableBehavior="single">
                <item
                    android:id="@+id/nav_terms"
                    android:icon="@drawable/terms_icon"
                    android:checked="false"
                    android:title="Terms &amp; Conditions" />
                <item
                    android:id="@+id/nav_about_us"
                    android:icon="@drawable/about_icon"
                    android:checked="false"
                    android:title="About Us" />
            </group>
        </menu>
    </item>
</group>
</menu>

Answer 2

這是完美的代碼！

在NavigationView添加三個atrributes

應用：itemIconTint
應用：itemTextColor
應用：itemBackground

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_app_base"
    app:menu="@menu/activity_app_base_drawer"
    android:background="@color/white"
    app:itemIconTint="@drawable/navigation_view_icon_tint_selector"
    app:itemTextColor="@drawable/navigation_view_text_selector"
    app:itemBackground="@drawable/ripple_navigation_selector"
 />

navigation_view_icon_tint_selector

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- This is used when the Navigation Item is checked -->
<item android:color="#005481" android:state_checked="true" />
<item android:color="#005481" android:state_pressed="true"></item>
<item android:color="#005481" android:state_activated="true"></item>
<!-- This is the default text color -->
<item android:color="#525252" />

navigation_view_text_selector

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- This is used when the Navigation Item is checked -->
<item android:color="#005481" android:state_checked="true" />
<item android:color="#005481" android:state_pressed="true"></item>
<item android:color="#005481" android:state_activated="true"></item>
<!-- This is the default text color -->
<item android:color="#525252" />

ripple_navigation_selector

 <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="#ffdbdb" android:state_pressed="true"/>
<item android:drawable="#ffdbdb" android:state_activated="true"/>
<item android:drawable="#ffdbdb" android:state_checked="true"/>
<item android:drawable="#FFFFFF"/>