Question

我创建了默认的底部导航项目。在其中一个片段中，我添加了ListView，效果很好。然后我将其更改为RecyclerView，它被BottomNavigationView遮盖了。我在做什么错了？

这是主要活动的布局：

<?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/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

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

        <android.support.v7.widget.Toolbar
            android:id="@+id/my_toolbar"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:background="?attr/colorPrimary"
            android:elevation="4dp"
            app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

        <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

    </LinearLayout>

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="0dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/navigation" />

</android.support.constraint.ConstraintLayout>

这是片段的布局：

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".DiaryFragment">

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/darker_gray"
        tools:listitem="@layout/recyclerview_item" />

    </LinearLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:src="@android:drawable/ic_menu_add"
        android:layout_marginBottom="70dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        />

</android.support.constraint.ConstraintLayout>

当RecyclerView包含的行超出屏幕显示的容量时，最后一行将部分出现在BottomNavigationView的后面。如果有任何建议，我将不胜感激。

编辑-这是屏幕截图：

编辑＃2：在第一种布局中，如果我将BottomNavigationView移到LinearLayout内（感谢@Juanje），并将其android:layout_width从0dp更改为{ {1}}，然后match_parent不再掩盖RecyclerView，但是现在BottomNavigationView被漂流了：

我正在修补它，如果有任何想法，我将不胜感激。

编辑＃3

以下是我在遵循公认的答案以及其他一些调整之后得出的结论。必要的更改是：

1）在第一种布局中：

将FloatingActionButton移到BottomNavigationView内
在LinearLayout中，将BottomNavigationView从android:layout_width更改为"0dp"

2）在第二种布局中：

在"match_parent"中，更改FloatingActionButton 从android:layout_marginBottom到"70dp"

第一个布局文件：

"10dp"

第二个布局文件：

<?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/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

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

        <android.support.v7.widget.Toolbar
            android:id="@+id/my_toolbar"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:background="?attr/colorPrimary"
            android:elevation="4dp"
            app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

        <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
            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/navigation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="0dp"
            android:layout_marginStart="0dp"
            android:background="?android:attr/windowBackground"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:menu="@menu/navigation" />

    </LinearLayout>

</android.support.constraint.ConstraintLayout>

Answer 1

您应将BottomNavigationView放在LinearLayout内。

Answer 2

您需要设置一些约束，否则您的元素会重叠。使用这个：

<?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/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/navigation"> <!--Added here and one line above; changed height: 0dp height means match constraint-->

        <android.support.v7.widget.Toolbar
            android:id="@+id/my_toolbar"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:background="?attr/colorPrimary"
            android:elevation="4dp"
            app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

        <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

    </LinearLayout>

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="0dp"
        android:layout_marginStart="0dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/navigation" />

</android.support.constraint.ConstraintLayout>

Answer 3

fragment元素的重要属性是设置 android:layout_height="0dp" 以匹配约束布局，并添加 app:layout_constraintBottom_toTopOf="@id/nav_view" 以使{ {1}}在fragment上方。

BottomNavigationView

Answer 4

这是我对usage: grep [-abcDEFGHhIiJLlmnOoqRSsUVvwxZ] [-A num] [-B num] [-C[num]] [-e pattern] [-f file] [--binary-files=value] [--color=when] [--context[=num]] [--directories=action] [--label] [--line-buffered] [--null] [pattern] [file ...] should add all members to my_service.conf as ha.initial_hosts list cluster member nodes lookup - wait until all join [4.4e-05] waiting for converge... [1.003424] waiting for converge... [2.003765] waiting for converge... [3.014148] waiting for converge... [4.027826] waiting for converge... [5.034108] waiting for converge... [6.035726] waiting for converge... [7.039808] waiting for converge... [8.04352] waiting for converge... [9.045821] waiting for converge... usage: grep [-abcDEFGHhIiJLlmnOoqRSsUVvwxZ] [-A num] [-B num] [-C[num]] [-e pattern] [-f file] [--binary-files=value] [--color=when] [--context[=num]] [--directories=action] [--label] [--line-buffered] [--null] [pattern] [file ...] [10.046889] Converged!...#<Set: {"1.2.3.4", "1.2.3.5"}> should find the first 2 registered nodes add 20003 in 3 seconds [5.4e-05] waiting for recipe to find our new member... ================================================================================ Error executing action `create` on resource 'template[/etc/my_service/my_service.conf]' ================================================================================ Chef::Exceptions::UserIDNotFound -------------------------------- cannot determine user id for 'dev', does the user exist on this system? Resource Declaration: --------------------- # In /var/folders/21/x4vz7kyd19z30q2f_jvn_g3c0000gn/T/chefspec20200202-59873-1g2naeefile_cache_path/cookbooks/my_service/recipes/configure.rb 85: template "#{node[:my_service][:config_file]}" do 86: source "my_service.conf.erb" 87: owner "dev" 88: group "dev" 89: mode "0644" 90: notifies :restart, 'service[my_service]', :delayed 91: variables( 92: { 94: :node_id => node_id, 95: :cluster_members => cluster_nodes, ... 99: } 100: ) 102: end Compiled Resource: ------------------ # Declared in /var/folders/21/x4vz7kyd19z30q2f_jvn_g3c0000gn/T/chefspec20200202-59873-1g2naeefile_cache_path/cookbooks/my_service/recipes/configure.rb:85:in `from_file' template("/etc/my_service/my_service.conf") do action [:create] default_guard_interpreter :default source "my_service.conf.erb" declared_type :template cookbook_name "my_service" recipe_name "configure" owner "dev" group "dev" mode "0644" variables {:node_id=>"node1", :cluster_members=>"1.2.3.4,1.2.3.5,1.2.3.6"} path "/etc/my_service/my_service.conf" verifications [] end System Info: ------------ chef_version=15.4.45 platform=ubuntu platform_version=14.04 ruby=ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin17] program_name=/opt/chefdk/embedded/bin/rspec executable=/Users/dan_mordechay/dev/af-chef/cookbooks/my_service/spec/configure_spec.rb #<Thread:0x00007fbb70636d88@/Users/dan_mordechay/dev/af-chef/cookbooks/my_service/spec/configure_spec.rb:138 run> terminated with exception (report_on_exception is true): Traceback (most recent call last): 26: from /Users/dan_mordechay/dev/af-chef/cookbooks/my_service/spec/configure_spec.rb:139:in `block (4 levels) in <top (required)>' 25: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chefspec-7.4.0/lib/chefspec/server_runner.rb:35:in `converge' 24: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chefspec-7.4.0/lib/chefspec/solo_runner.rb:122:in `converge' 23: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/client.rb:699:in `converge' 22: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/client.rb:699:in `catch' 21: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/client.rb:704:in `block in converge' 20: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:130:in `converge' 19: from /opt/chefdk/embedded/lib/ruby/2.6.0/forwardable.rb:230:in `execute_each_resource' 18: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/resource_list.rb:94:in `execute_each_resource' 17: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:55:in `each_with_index' 16: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:104:in `iterate' 15: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:86:in `step' 14: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:115:in `call_iterator_block' 13: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/resource_list.rb:96:in `block in execute_each_resource' 12: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:132:in `block in converge' 11: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:108:in `run_all_actions' 10: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:108:in `each' 9: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:108:in `block in run_all_actions' 8: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:74:in `run_action' 7: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chefspec-7.4.0/lib/chefspec/extensions/chef/resource.rb:42:in `run_action' 6: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource.rb:585:in `run_action' 5: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/provider.rb:175:in `run_action' 4: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/provider.rb:197:in `process_resource_requirements' 3: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:315:in `run' 2: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:315:in `each' 1: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:316:in `block in run' /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:238:in `run': cannot determine user id for 'my_service', does the user exist on this system? (Chef::Exceptions::UserIDNotFound) 26: from /Users/dan_mordechay/dev/af-chef/cookbooks/my_service/spec/configure_spec.rb:139:in `block (4 levels) in <top (required)>' 25: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chefspec-7.4.0/lib/chefspec/server_runner.rb:35:in `converge' 24: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chefspec-7.4.0/lib/chefspec/solo_runner.rb:122:in `converge' 23: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/client.rb:699:in `converge' 22: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/client.rb:699:in `catch' 21: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/client.rb:704:in `block in converge' 20: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:130:in `converge' 19: from /opt/chefdk/embedded/lib/ruby/2.6.0/forwardable.rb:230:in `execute_each_resource' 18: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/resource_list.rb:94:in `execute_each_resource' 17: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:55:in `each_with_index' 16: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:104:in `iterate' 15: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:86:in `step' 14: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/stepable_iterator.rb:115:in `call_iterator_block' 13: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource_collection/resource_list.rb:96:in `block in execute_each_resource' 12: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:132:in `block in converge' 11: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:108:in `run_all_actions' 10: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:108:in `each' 9: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:108:in `block in run_all_actions' 8: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/runner.rb:74:in `run_action' 7: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chefspec-7.4.0/lib/chefspec/extensions/chef/resource.rb:42:in `run_action' 6: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/resource.rb:585:in `run_action' 5: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/provider.rb:175:in `run_action' 4: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/provider.rb:197:in `process_resource_requirements' 3: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:315:in `run' 2: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:315:in `each' 1: from /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:316:in `block in run' /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.4.45/lib/chef/mixin/why_run.rb:238:in `run': template[/etc/my_service/my_service.conf] (my_service::configure line 85) had an error: Chef::Exceptions::UserIDNotFound: cannot determine user id for 'my_service', does the user exist on this system? (Chef::Exceptions::UserIDNotFound) [1.004191] Found!...#<Set: {"1.2.3.4", "1.2.3.5", "1.2.3.6"}> should find it once added的解决方案：

SwipeRefreshLayout

<?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:layout_width="match_parent" android:layout_height="match_parent" xmlns:tools="http://schemas.android.com/tools"> <androidx.swiperefreshlayout.widget.SwipeRefreshLayout android:id="@+id/swipe_refresh" android:layout_width="match_parent" android:layout_height="0dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"> <androidx.recyclerview.widget.RecyclerView android:id="@+id/people_list" android:layout_width="match_parent" android:layout_height="match_parent"/> </androidx.swiperefreshlayout.widget.SwipeRefreshLayout> </androidx.constraintlayout.widget.ConstraintLayout>由BottomNavigationView包装，看起来像：

ConstraintLayout

Android-BottomNavigationView遮盖了RecyclerView

4 个答案: