Android Studio DrawerLayout scrimcolor 未显示

Question

我有一个使用以下布局的 activity：

<android.support.v4.widget.DrawerLayout
android:id="@+id/root_main_activity"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:openDrawer="start"
xmlns:tools="http://schemas.android.com/tools">

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbarlayout_main_activity"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar_main_activity"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"/>

    <android.support.design.widget.TabLayout
        android:id="@+id/tablayout_main_activity"
        app:tabIndicatorHeight="3dp"
        app:tabIndicatorColor="@android:color/white"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager_main_activity"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorWindowBackground"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</android.support.design.widget.AppBarLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/navigationview"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:background="@color/colorWindowBackground"
    android:fitsSystemWindows="true"
    android:layout_gravity="start">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <include layout="@layout/drawer_header" />

            <ExpandableListView
                android:id="@+id/expandablelistview_drawer"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:groupIndicator="@null"
                android:divider="@null"
                android:dividerHeight="0dp"/>

        </LinearLayout>

    </ScrollView>

</android.support.design.widget.NavigationView>

我能想到的都试过了，比如；将 navigationView 放在 appbarlayout 的不同位置，将它放在 appbarlayout 之前和之后，最后尝试在 activity 的 oncreate 方法中动态设置 scrimcolor。 None 这些东西有效，有人知道我的问题的解决方案吗？

Answer 1

经过大量尝试，我成功了。我不清楚的原因，但这是有同样问题的人的工作布局：

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

<LinearLayout
    android:id="@+id/linearlayout_main_activity"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbarlayout_main_activity"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar_main_activity"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"/>

        <android.support.design.widget.TabLayout
            android:id="@+id/tablayout_main_activity"
            app:tabIndicatorHeight="3dp"
            app:tabIndicatorColor="@android:color/white"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager_main_activity"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorWindowBackground"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</LinearLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/navigationview"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:background="@color/colorWindowBackground"
    android:fitsSystemWindows="true"
    android:layout_gravity="start">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <include layout="@layout/drawer_header" />

            <ExpandableListView
                android:id="@+id/expandablelistview_drawer"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:groupIndicator="@null"
                android:divider="@null"
                android:dividerHeight="0dp"/>

        </LinearLayout>

    </ScrollView>

</android.support.design.widget.NavigationView>

Android Studio DrawerLayout scrimcolor 未显示

Android Studio DrawerLayout scrimcolor not showing

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