我尝试将 recyclerview 与自定义工具栏和底栏一起使用,但两者都是重叠的 recyclerview,即使我在 xml 文件中使用了constraintTop_toBottomOf 和constraintBottom_toTopOf。
活动主体=
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.FeedFragment">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:title="@string/feed"
/>
<androidx.fragment.app.FragmentContainerView
android:id="@+id/fragmentContainerView"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintTop_toBottomOf="@+id/toolbar"
app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:navGraph="@navigation/nav_map" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="75dp"
android:layout_gravity="bottom"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="@menu/bottom_nav_feed" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
您缺少底部导航和工具栏的约束 ID , 在您的
app:layout_constraintBottom_toTopOf="@+id/fragmentContainerView"
中添加 toolbar
并在 Bottomnavigation添加
app:layout_constraintTop_toBottomOf="@+id/fragmentContainerView"
结论:
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="@+id/fragmentContainerView"
app:title="@string/feed"
/>
<androidx.fragment.app.FragmentContainerView
android:id="@+id/fragmentContainerView"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintTop_toBottomOf="@+id/toolbar"
app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:navGraph="@navigation/nav_map" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="75dp"
android:layout_gravity="bottom"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="@menu/bottom_nav_feed"
app:layout_constraintTop_toBottomOf="@+id/fragmentContainerView"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>