【发布时间】：2020-05-31 21:09:55
【问题描述】：
我正在制作一个主要活动包含在 TabLayout 和 ViewPager 中的 android 应用程序，需要一个浮动操作按钮来启动另一个活动，问题是当我添加一个 CoordinatorLayout 时，ViewPager 不滚动（ viewPager 包含 3 个片段，一个带有 RecyclerView，另外两个仅包含带有大量文本的 textview，因此它们都必须垂直滚动。
ViewPager 可以完美运行，但是当我将它放在 CoordinatorLayout 中时，无法在 ViewPager 中加载的任何片段中进行垂直滚动。
我尝试在每个片段根布局中添加 android:nestedScrollingEnabled="true" 但它不起作用。
编辑： ViewPager 中加载的所有片段都将 ScrollView 作为 Root 视图。 这是我的主要活动布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<androidx.coordinatorlayout.widget.CoordinatorLayout
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:elevation="0dp"
>
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/colorPrimary"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
/>
<com.google.android.material.tabs.TabLayout
android:id="@+id/TabLayoutPrincipal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorColor="@color/colorAccent"
app:tabGravity="fill"
app:tabMode="fixed"/>
<androidx.viewpager.widget.ViewPager
android:id="@+id/ViewPagerPrincipal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:nestedScrollingEnabled="true"
/>
</com.google.android.material.appbar.AppBarLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/addShotFAB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_add_white_24dp"
android:layout_gravity="bottom|end"
android:layout_margin="16dp"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="@menu/menu_drawer"/>
</androidx.drawerlayout.widget.DrawerLayout>
这是带有 RecyclerView 的片段内部的内容：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:nestedScrollingEnabled="true">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/RecViewTomas"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
另一个片段：
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:textSize="50sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="There are many variations of passages of Lorem Ipsum available, but the majority have suffered alteration in some form, by injected humour, or randomised words which don't look even slightly believable. If you are going to use a passage of Lorem Ipsum, you need to be sure there isn't anything embarrassing hidden in the middle of text. All the Lorem Ipsum generators on the Internet tend to repeat predefined chunks as necessary, making this the first true generator on the Internet. It uses a dictionary of over 200 Latin words, combined with a handful of model sentence structures, to generate Lorem Ipsum which looks reasonable. The generated Lorem Ipsum is therefore always free from repetition, injected humour, or non-characteristic words etc.
Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, comes from a line in section 1.10.32.
The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham."/>
</FrameLayout>
</ScrollView>
【问题讨论】：
-
你应该在需要垂直滚动的片段中添加
ScrollView -
是的，所有片段都在 ScrollView 内
-
你能把不滚动的片段的 XML 贴出来吗？
标签： android android-fragments android-viewpager