从连续的单击侦听器导航到另一个片段 [英] Navigating from click listener in a row to another fragment
本文介绍了从连续的单击侦听器导航到另一个片段的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要单击片段A 中的按钮，以导航到片段C
使用导航组件
FragmentA
private void setListAdapter() {
final FragmentACallback callback = new FragmentACallback() {
@Override
public void onEdit(View v, int accID) {
/*
i tried all these solutions but not working
*/
// Navigation.createNavigateOnClickListener(R.id.action_nav).onClick(v);
// Navigation.findNavController(v.itemView).navigate(R.id.action_nav);
// NavHostFragment.findNavController(v).navigate(R.id.action_nav);
Navigation.findNavController(getActivity(),R.id.nav_host_fragment).navigate(R.id.action_nav);
// Navigation.findNavController((MainActivity)(v.getContext()), R.id.nav_host_fragment).navigate(R.id.action_nav);
}
};
adapter = new PageListAdapter(getActivity(), data, callback);
binding.rcvList.setAdapter(adapter);
}
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/mobile_navigation"
app:startDestination="@+id/nav_home">
<fragment
android:id="@+id/nav_home"
android:name=".HomeFragment"
tools:layout="@layout/fragment_home" />
<fragment
android:id="@+id/nav_viewpager1"
android:name=".ViewPager1"
tools:layout="@layout/fragment_pager1">
<action
android:id="@+id/action_nav"
app:destination="@id/fragment_pager2" />
</fragment>
<fragment
android:id="@+id/nav_viewpager2"
android:name=".ViewPager2"
tools:layout="@layout/fragment_pager2" />
<fragment
android:id="@+id/nav_fragment_a"
android:name=".FragmentA"
tools:layout="@layout/fragment_a" />
<fragment
android:id="@+id/nav_fragment_c"
android:name=".FragmentC"
tools:layout="@layout/fragment_C" />
</navigation>
我还尝试将导航从 nav_fragment_a 导航到 nav_fragment_c ，但这总是给我一个例外
java.lang.IllegalArgumentException:此NavController未知导航目标com.appname:id/action_nav
解决方案
要解决此问题，请将操作作为全局操作进行如下操作:
<?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/mobile_navigation"
app:startDestination="@+id/nav_home">
<fragment
android:id="@+id/nav_home"
android:name=".HomeFragment"
tools:layout="@layout/fragment_home" />
<fragment
android:id="@+id/nav_viewpager1"
android:name=".ViewPager1"
tools:layout="@layout/fragment_pager1"/>
<fragment
android:id="@+id/nav_viewpager2"
android:name=".ViewPager2"
tools:layout="@layout/fragment_pager2" />
<fragment
android:id="@+id/nav_fragment_a"
android:name=".FragmentA"
tools:layout="@layout/fragment_a" />
<fragment
android:id="@+id/nav_fragment_c"
android:name=".FragmentC"
tools:layout="@layout/fragment_C" />
<action
android:id="@+id/action_nav"
app:destination="@id/fragment_pager2" />
</navigation>
您可以在此处
I need to click the button in Fragment A to Navigate to Fragment C
am using Navigation Component , Data binding and Android ViewModel
row.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:padding="@dimen/padding">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/img_edit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/margin_small"
android:layout_marginRight="@dimen/margin_small"
app:srcCompat="@drawable/edit"
app:tint="@color/grey"
android:background="@drawable/circle"
android:onClick="@{(v) -> handler.onEdit(v,var.accId)}"
/>
</RelativeLayout>
<data>
<variable
name="var" type="Result" />
<variable
name="handler" type="FragmentACallback" />
</data>
</layout>
FragmentA
private void setListAdapter() {
final FragmentACallback callback = new FragmentACallback() {
@Override
public void onEdit(View v, int accID) {
/*
i tried all these solutions but not working
*/
// Navigation.createNavigateOnClickListener(R.id.action_nav).onClick(v);
// Navigation.findNavController(v.itemView).navigate(R.id.action_nav);
// NavHostFragment.findNavController(v).navigate(R.id.action_nav);
Navigation.findNavController(getActivity(),R.id.nav_host_fragment).navigate(R.id.action_nav);
// Navigation.findNavController((MainActivity)(v.getContext()), R.id.nav_host_fragment).navigate(R.id.action_nav);
}
};
adapter = new PageListAdapter(getActivity(), data, callback);
binding.rcvList.setAdapter(adapter);
}
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/mobile_navigation"
app:startDestination="@+id/nav_home">
<fragment
android:id="@+id/nav_home"
android:name=".HomeFragment"
tools:layout="@layout/fragment_home" />
<fragment
android:id="@+id/nav_viewpager1"
android:name=".ViewPager1"
tools:layout="@layout/fragment_pager1">
<action
android:id="@+id/action_nav"
app:destination="@id/fragment_pager2" />
</fragment>
<fragment
android:id="@+id/nav_viewpager2"
android:name=".ViewPager2"
tools:layout="@layout/fragment_pager2" />
<fragment
android:id="@+id/nav_fragment_a"
android:name=".FragmentA"
tools:layout="@layout/fragment_a" />
<fragment
android:id="@+id/nav_fragment_c"
android:name=".FragmentC"
tools:layout="@layout/fragment_C" />
</navigation>
i also tried to make the navigation from nav_fragment_a to nav_fragment_c but it always give me an exception
java.lang.IllegalArgumentException: navigation destination com.appname:id/action_nav is unknown to this NavController
解决方案
To solve this issue make action as a global action as following:
<?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/mobile_navigation"
app:startDestination="@+id/nav_home">
<fragment
android:id="@+id/nav_home"
android:name=".HomeFragment"
tools:layout="@layout/fragment_home" />
<fragment
android:id="@+id/nav_viewpager1"
android:name=".ViewPager1"
tools:layout="@layout/fragment_pager1"/>
<fragment
android:id="@+id/nav_viewpager2"
android:name=".ViewPager2"
tools:layout="@layout/fragment_pager2" />
<fragment
android:id="@+id/nav_fragment_a"
android:name=".FragmentA"
tools:layout="@layout/fragment_a" />
<fragment
android:id="@+id/nav_fragment_c"
android:name=".FragmentC"
tools:layout="@layout/fragment_C" />
<action
android:id="@+id/action_nav"
app:destination="@id/fragment_pager2" />
</navigation>
you can read more about global action in a navigation from here
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