滚动时片段内容隐藏在 BottomNavigationView 后面
Fragment content is hidden behind BottomNavigationView when scrolling
我对此进行了大量研究,但不知道该怎么做 - 我在片段中有一些内容被 activity 中的 BottomNavigation 栏剪掉了,我不确定该怎么办。我已经尝试将 app:layout_behavior="@string/appbar_scrolling_view_behavior"
添加到 NestedScrollView 但内容的底部(位置名称)仍然被切断 - 可能有一个简单的修复方法但我无法弄清楚。我的主要 activity 和 "home" 片段的 XML 如下:
activity_home.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/home_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="@layout/app_bar" />
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<android.support.design.widget.BottomNavigationView
android:id="@+id/bottom_nav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:background="@color/navbarBackground"
app:menu="@menu/bottom_nav_menu" />
</LinearLayout>
home_fragment.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/home_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp">
<ImageView
android:id="@+id/tokyo_placeholder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitStart"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/main_screen_placeholder" />
<ImageView
android:id="@+id/airplane_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/circle_background"
app:layout_constraintBottom_toBottomOf="@+id/tokyo_placeholder"
app:layout_constraintLeft_toLeftOf="@+id/tokyo_placeholder"
app:layout_constraintRight_toRightOf="@+id/tokyo_placeholder"
app:layout_constraintTop_toTopOf="@+id/tokyo_placeholder"
app:srcCompat="@drawable/icons8_airplane_48"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<android.support.v4.widget.NestedScrollView
android:id="@+id/scroll_view"
android:layout_width="0dp"
android:layout_height="286dp"
android:layout_marginBottom="@dimen/app_bar_height"
android:layout_marginStart="5dp"
android:layout_marginTop="5dp"
android:fillViewport="true"
app:layout_constraintBottom_toTopOf="@id/bottom_nav"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tokyo_placeholder"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<TextView
android:id="@+id/destination_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/featured_destinations_headline"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold" />
<android.support.v7.widget.RecyclerView
android:id="@+id/featured_destinations_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/destination_headline" />
<TextView
android:id="@+id/saved_trips_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/featured_destinations_recycler_view"
android:fontFamily="sans-serif"
android:text="@string/saved_trips"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold" />
<android.support.v7.widget.RecyclerView
android:id="@+id/saved_trips_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/saved_trips_headline" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>
app_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/app_bar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:elevation="4dp"
android:background="#fff"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
android:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
举个例子来说明我的意思,here is the content when the navigation bar is moved out of the way and here is the content with the bar in the way。我认为问题是某种 margin/padding 问题,但不太清楚要解决什么问题。
编辑: 我已经创建了一个包含相关代码的存储库(以及一个可行的模拟器示例)here - 请注意代码是用 Kotlin 编写的,但我认为问题不在于任何实际代码,而更多在于布局
@Tai M.
问题似乎是 NestedScrollView 的 硬编码 高度。由于您已经在使用 ConstraintLayout,因此您可以轻松地放置此视图,而无需添加另一个 Relative 布局。
如果您希望页眉图像一张叠放,请将它们包装在 FrameLayout 中。为容器分配一个 id 并添加:
app:layout_constraintTop_toBottomOf="@+id/headerImageContainer"
到 NestedScrollView。
那么您可能可以摆脱 RelativeLayout 并将其替换为另一个 ConstraintLayout 以仅使用约束来构造其余视图。
此外,根据 material 设计定义,BottomNavigationView 的高度是 56dp,您可以直接指定它而不是让它将内容包裹在
activity_home.xml
<ConstraintLayout ...>
<FrameLayout ...>
<ImageView .../>
<ImageView .../>
</FrameLayout>
<NestenScrollView ... wrap_content>
<ConstraintLayout ...>
<TextView .../>
<RecyclerView .../>
<!-- Assign constraints accordingly -->
<TextView .../>
<RecyclerView .../>
</ConstraintLayout>
</NestenScrollView>
</ConstraintLayout>
希望这对您有所帮助。
我不确定预期的行为是什么,仅通过阅读您的问题我无法理解。已应用 this patch,其中仅包括 home_fragment.xml 布局更改:
<?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/home_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp">
<FrameLayout
android:id="@+id/header_container"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<ImageView
android:id="@+id/tokyo_placeholder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitStart"
app:srcCompat="@drawable/main_screen_placeholder"
tools:ignore="ContentDescription" />
<ImageView
android:id="@+id/airplane_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:background="@drawable/circle_background"
app:srcCompat="@drawable/icons8_airplane_48"
tools:ignore="ContentDescription" />
</FrameLayout>
<android.support.v4.widget.NestedScrollView
android:id="@+id/scroll_view"
android:layout_width="0dp"
android:layout_height="0dp"
android:fillViewport="true"
android:paddingLeft="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/header_container">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<TextView
android:id="@+id/destination_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/featured_destinations_headline"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold" />
<android.support.v7.widget.RecyclerView
android:id="@+id/featured_destinations_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/destination_headline"
app:layout_constraintBottom_toTopOf="@id/saved_trips_headline"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/destination_headline" />
<TextView
android:id="@+id/saved_trips_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:text="@string/saved_trips"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintBottom_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/featured_destinations_recycler_view" />
<android.support.v7.widget.RecyclerView
android:id="@+id/saved_trips_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@id/app_bar"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/saved_trips_headline" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>
然后你会得到这个输出:
我对此进行了大量研究,但不知道该怎么做 - 我在片段中有一些内容被 activity 中的 BottomNavigation 栏剪掉了,我不确定该怎么办。我已经尝试将 app:layout_behavior="@string/appbar_scrolling_view_behavior"
添加到 NestedScrollView 但内容的底部(位置名称)仍然被切断 - 可能有一个简单的修复方法但我无法弄清楚。我的主要 activity 和 "home" 片段的 XML 如下:
activity_home.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/home_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="@layout/app_bar" />
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<android.support.design.widget.BottomNavigationView
android:id="@+id/bottom_nav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:background="@color/navbarBackground"
app:menu="@menu/bottom_nav_menu" />
</LinearLayout>
home_fragment.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/home_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp">
<ImageView
android:id="@+id/tokyo_placeholder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitStart"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/main_screen_placeholder" />
<ImageView
android:id="@+id/airplane_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/circle_background"
app:layout_constraintBottom_toBottomOf="@+id/tokyo_placeholder"
app:layout_constraintLeft_toLeftOf="@+id/tokyo_placeholder"
app:layout_constraintRight_toRightOf="@+id/tokyo_placeholder"
app:layout_constraintTop_toTopOf="@+id/tokyo_placeholder"
app:srcCompat="@drawable/icons8_airplane_48"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<android.support.v4.widget.NestedScrollView
android:id="@+id/scroll_view"
android:layout_width="0dp"
android:layout_height="286dp"
android:layout_marginBottom="@dimen/app_bar_height"
android:layout_marginStart="5dp"
android:layout_marginTop="5dp"
android:fillViewport="true"
app:layout_constraintBottom_toTopOf="@id/bottom_nav"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tokyo_placeholder"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<TextView
android:id="@+id/destination_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/featured_destinations_headline"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold" />
<android.support.v7.widget.RecyclerView
android:id="@+id/featured_destinations_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/destination_headline" />
<TextView
android:id="@+id/saved_trips_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/featured_destinations_recycler_view"
android:fontFamily="sans-serif"
android:text="@string/saved_trips"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold" />
<android.support.v7.widget.RecyclerView
android:id="@+id/saved_trips_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/saved_trips_headline" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>
app_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/app_bar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:elevation="4dp"
android:background="#fff"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
android:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
举个例子来说明我的意思,here is the content when the navigation bar is moved out of the way and here is the content with the bar in the way。我认为问题是某种 margin/padding 问题,但不太清楚要解决什么问题。
编辑: 我已经创建了一个包含相关代码的存储库(以及一个可行的模拟器示例)here - 请注意代码是用 Kotlin 编写的,但我认为问题不在于任何实际代码,而更多在于布局
@Tai M. 问题似乎是 NestedScrollView 的 硬编码 高度。由于您已经在使用 ConstraintLayout,因此您可以轻松地放置此视图,而无需添加另一个 Relative 布局。
如果您希望页眉图像一张叠放,请将它们包装在 FrameLayout 中。为容器分配一个 id 并添加: app:layout_constraintTop_toBottomOf="@+id/headerImageContainer" 到 NestedScrollView。
那么您可能可以摆脱 RelativeLayout 并将其替换为另一个 ConstraintLayout 以仅使用约束来构造其余视图。
此外,根据 material 设计定义,BottomNavigationView 的高度是 56dp,您可以直接指定它而不是让它将内容包裹在 activity_home.xml
<ConstraintLayout ...>
<FrameLayout ...>
<ImageView .../>
<ImageView .../>
</FrameLayout>
<NestenScrollView ... wrap_content>
<ConstraintLayout ...>
<TextView .../>
<RecyclerView .../>
<!-- Assign constraints accordingly -->
<TextView .../>
<RecyclerView .../>
</ConstraintLayout>
</NestenScrollView>
</ConstraintLayout>
希望这对您有所帮助。
我不确定预期的行为是什么,仅通过阅读您的问题我无法理解。已应用 this patch,其中仅包括 home_fragment.xml 布局更改:
<?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/home_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp">
<FrameLayout
android:id="@+id/header_container"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<ImageView
android:id="@+id/tokyo_placeholder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitStart"
app:srcCompat="@drawable/main_screen_placeholder"
tools:ignore="ContentDescription" />
<ImageView
android:id="@+id/airplane_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:background="@drawable/circle_background"
app:srcCompat="@drawable/icons8_airplane_48"
tools:ignore="ContentDescription" />
</FrameLayout>
<android.support.v4.widget.NestedScrollView
android:id="@+id/scroll_view"
android:layout_width="0dp"
android:layout_height="0dp"
android:fillViewport="true"
android:paddingLeft="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/header_container">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<TextView
android:id="@+id/destination_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/featured_destinations_headline"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold" />
<android.support.v7.widget.RecyclerView
android:id="@+id/featured_destinations_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/destination_headline"
app:layout_constraintBottom_toTopOf="@id/saved_trips_headline"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/destination_headline" />
<TextView
android:id="@+id/saved_trips_headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:text="@string/saved_trips"
android:textAllCaps="true"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
android:textSize="14sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintBottom_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/featured_destinations_recycler_view" />
<android.support.v7.widget.RecyclerView
android:id="@+id/saved_trips_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@id/app_bar"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/saved_trips_headline" />
</android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.constraint.ConstraintLayout>
然后你会得到这个输出: