CoordinatorLayout + AppBarLayout + NavigationDrawer

CoordinatorLayout + AppBarLayout + NavigationDrawer

我在将 CoordinatorLayoutAppBarLayoutNavigationDrawer 组合时遇到布局问题。

问题是 NavigationDrawer 及其内容隐藏在工具栏后面。我已经做了很多研究并尝试了很多重组,但是 "solutions" 的 none 解决了我的问题。

可以在这个 Webm 小视频中找到演示:https://www.dropbox.com/s/i5zfc2x2ts2fws7/navigation_drawer_Whosebug32523188.webm?dl=0

基本样式为 Theme.AppCompat.Light.NoActionBar

我的activity_overview.xml看起来像这样:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/overview_coordinator_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">


        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimaryDark"
            app:layout_scrollFlags="enterAlways|scroll" />


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

    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clickable="true"
        android:focusableInTouchMode="true">

        <android.support.v4.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/lorem_ipsum_long" />
        </android.support.v4.widget.NestedScrollView>

        <android.support.design.widget.NavigationView
            android:id="@+id/nvView"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:background="@android:color/white"
            app:headerLayout="@layout/nav_header"
            app:menu="@menu/navigationdrawer_main" />

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


    <android.support.design.widget.FloatingActionButton
        android:id="@+id/overview_floating_action_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"

        android:clickable="true"
        android:src="@drawable/ic_add"
        app:layout_anchor="@id/overview_coordinator_layout"
        app:layout_anchorGravity="bottom|right|end"
        app:layout_behavior="@string/fab_onscroll_behavior" />

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

您的 CoordinatorLayout 包裹着您的 DrawerLayout 和 NavigationView,这意味着 Coordinator 控制着所有内容的布局方式。您需要将 Coordinator 嵌套在抽屉中,如下所示:

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"
    android:focusableInTouchMode="true">

    <android.support.design.widget.CoordinatorLayout
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/overview_coordinator_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">


            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimaryDark"
                app:layout_scrollFlags="enterAlways|scroll" />

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

        <android.support.v4.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/lorem_ipsum_long" />

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

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/overview_floating_action_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:clickable="true"
            android:src="@drawable/ic_add"
            app:layout_anchor="@id/overview_coordinator_layout"
            app:layout_anchorGravity="bottom|right|end"
            app:layout_behavior="@string/fab_onscroll_behavior" />

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

    <android.support.design.widget.NavigationView
        android:id="@+id/nvView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@android:color/white"
        app:headerLayout="@layout/nav_header"
        app:menu="@menu/navigationdrawer_main" />

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

应该解决了!

为了补充上一个答案,您可以通过将 CoordinatorLayout+ 子元素移动到单独的 xml 文件中来使 DrawerLayout 更干净。然后只需使用 "include" 选项添加文件。

<?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">

  <!-- Widget Coordinator + child elements go here -->
  <include
    layout="@layout/app_bar_main"
    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_main"
    app:menu="@menu/activity_main_drawer" />

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