java - 折叠工具栏不会随着抽屉布局而折叠

Question

这里是初学者。我的折叠工具栏的 react 与常规工具栏一样，没有折叠行为。

这是我有抽屉布局的 Activity 。

    <?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
        android:id="@+id/includedLayout"
        layout="@layout/app_bar_activity_drawer"
        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_activity_drawer"
        app:menu="@menu/activity_drawer_drawer" />

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

在上面的布局中，包含了此布局，其中包含所有其他内容 app_bar_activity_drawer.xml

    <?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity_drawer">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

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

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <include layout="@layout/content_activity_drawer" />
    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_dialog_email" />

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

这是上面布局中包含的布局 content_activity_drawer.xml

    <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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/helloLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".activity_drawer"
    tools:showIn="@layout/app_bar_activity_drawer">

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

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hello" />


    </LinearLayout>

</android.support.constraint.ConstraintLayout>

有什么问题请告知..非常感谢您的支持。

Answer 1

实际上，您没有在布局中添加折叠工具栏，

From the documentation

To add a collapsing toolbar to your layout, place the CollapsingToolbarLayout inside an AppBarLayout. Then, add a Toolbar and any other views as a child to the CollapsingToolbarLayout. Make sure that the entire view structure is inside a CoordinatorLayout to take advantage of CollapsingToolbarLayout’s scrolling and features.

带有折叠工具栏的布局可能看起来像这样:

<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Scrollable view here -->

  <com.google.android.material.appbar.AppBarLayout
      android:layout_width="match_parent"
      android:layout_height="@dimen/tall_toolbar_height">

    <com.google.android.material.appbar.CollapsingToolbarLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleGravity="top"
        app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">

      <androidx.appcompat.widget.Toolbar
          android:layout_width="match_parent"
          android:layout_height="?attr/actionBarSize"
          app:layout_collapseMode="pin"/>
    </com.google.android.material.appbar.CollapsingToolbarLayout>
  </com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

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