Android 导航组件后退按钮不起作用
[英]Android Navigation Component back button not working
问题描述
I'm using the Navigation Component in android where I have set 6 fragments initially.
我在 android 中使用导航组件，我最初设置了 6 个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段（ProfileFragment）时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从起始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段上——后退按钮什么都不做。
Here's my navigation.xml :这是我的导航。xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的片段代码中，我的导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但由于某种原因，这个新添加的片段并没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?还是我的动作/片段配置有什么问题？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中没有做任何事情。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
11 个解决方案
解决方案1
24 2020-06-03 15:22:04
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案2
20 2020-07-14 10:54:52
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案3
8 2020-01-21 05:31:51
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案4
6 2020-01-29 12:11:57
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案5
2 2020-07-04 17:29:21
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案6
1 2020-04-09 13:25:59
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案7
1 2020-06-19 09:34:37
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案8
1 2020-10-28 16:05:05
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案9
1 2021-09-16 08:20:23
The Simplest Answer for your problem (If it has something to do with fragments - Bottom navigation) could be您的问题的最简单答案（如果它与片段有关 - 底部导航）可能是
To set defaultNavHost = "false"设置 defaultNavHost = "false"
From Official Documentation it says-> Let's say you have 3 fragments set for Bottom Navigation, then setting从官方文档中说->假设您为底部导航设置了 3 个片段，然后设置
"defaultNavHost = true" will make fragment A acts like a parent, so when user clicks on back button in fragment 3, it comes to fragment 1 instead of closing the activity (Bottom Navigation as Example). “defaultNavHost = true” 将使片段 A 像父级一样，因此当用户单击片段 3 中的后退按钮时，它会到达片段 1 而不是关闭活动（以底部导航为例）。
Your XML should look like this, if you wanna just press back and close the activity from any fragment you are in.您的 XML 应该看起来像这样，如果您只想按下并关闭您所在的任何片段的活动。
<fragment
android:id="@+id/fragmentContainerView"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/bottom_nav"
app:defaultNavHost="false"
app:navGraph="@navigation/visit_summary_navigation" />
解决方案10
0 2020-08-24 10:17:49
I'm using the Navigation Component in android where I have set 6 fragments initially.我正在使用android中的导航组件，其中最初设置了6个片段。 The problem is when I added a new fragment (ProfileFragment).问题是当我添加一个新片段 (ProfileFragment) 时。
When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off.当我从开始目的地导航到这个新片段时，按下本机后退按钮不会弹出当前片段。 Instead, it just stays to the fragment I'm in - the back button does nothing.相反，它只停留在我所在的片段中——后退按钮什么也不做。
Here's my navigation.xml :这是我的navigation.xml ：
<?xml version="1.0" encoding="utf-8"?>
<navigation 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/dashboard_navigation"
app:startDestination="@id/dashboardFragment"
>
<fragment
android:id="@+id/dashboardFragment"
android:name="com.devssocial.localodge.ui.dashboard.ui.DashboardFragment"
android:label="DashboardFragment"
>
<action
android:id="@+id/action_dashboardFragment_to_newPostFragment"
app:destination="@id/newPostFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_notificationsFragment"
app:destination="@id/notificationsFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_mediaViewer"
app:destination="@id/mediaViewer"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
<action
android:id="@+id/action_dashboardFragment_to_postDetailFragment"
app:destination="@id/postDetailFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
====================== HERE'S THE PROFILE ACTION ====================
<action
android:id="@+id/action_dashboardFragment_to_profileFragment"
app:destination="@id/profileFragment"
app:enterAnim="@anim/slide_in_up"
app:exitAnim="@anim/slide_out_down"
app:popEnterAnim="@anim/slide_in_up"
app:popExitAnim="@anim/slide_out_down"
/>
=====================================================================
</fragment>
<fragment
android:id="@+id/profileFragment"
android:name="com.devssocial.localodge.ui.profile.ui.ProfileFragment"
android:label="fragment_profile"
tools:layout="@layout/fragment_profile"
/>
</navigation>
In the image above, the highlighted arrow (in the left) is the navigation action I'm having troubles with.在上图中，突出显示的箭头（左侧）是我遇到问题的导航操作。
In my Fragment code, I'm navigating as follows:在我的Fragment代码中，我导航如下：
findNavController().navigate(R.id.action_dashboardFragment_to_profileFragment)
The other navigation actions are working as intended.其他导航操作按预期工作。 But for some reason, this newly added fragment does not behave as intended.但是由于某种原因，这个新添加的片段没有按预期运行。
There are no logs showing when I navigate to ProfileFragment and when I press the back button.当我导航到 ProfileFragment 和按下后退按钮时，没有显示日志。
Am I missing something?我错过了什么吗？ or is there anything wrong with my action/fragment configurations?或者我的动作/片段配置有什么问题吗？
EDIT: I do not do anything in ProfileFragment .编辑：我在ProfileFragment中什么也不做。 Here's the code for it:这是它的代码：
class ProfileFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false)
}
}
And my activity xml containing the nav host:我的活动 xml包含导航主机：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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">
<fragment
android:id="@+id/dashboard_navigation"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="@navigation/dashboard_navigation"
app:defaultNavHost="true"/>
</FrameLayout>
解决方案11
0 2022-08-17 04:59:37
I had faced the same issue due to the below "run blocking" code block.由于下面的“运行阻塞”代码块，我遇到了同样的问题。 So don't use it if not necessary.因此，如果没有必要，请不要使用它。
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