I'm using Android Navigation Component for Navigation. I have a LoginFragment which has a button to transition to SignUpFragment. On clicking the button I'm getting this error.
java.lang.IllegalStateException: View android.support.v7.widget.AppCompatButton{49d9bd1 VFED..C.. ...P.... 201,917-782,1061 #7f090172 app:id/signUpLink} does not have a NavController set
Here is my nav_graph.xml
<navigation xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
app:startDestination="@id/loginFragment">
<fragment
android:id="@+id/loginFragment"
android:name="org.test.oe.app.core.auth.login.LoginFragment"
android:label="login_fragment"
tools:layout="@layout/login_fragment">
<action
android:id="@+id/action_loginFragment_to_signUpFragment"
app:destination="@id/signUpFragment" />
</fragment>
</navigation>
Here is the code in LoginFragment for Navigation -
binding.signUpLink.setOnClickListener(Navigation.createNavigateOnClickListener(R.id.action_loginFragment_to_signUpFragment, null));
Here is extract from activity layout file for NavHostFragment -
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="android.navigation.fragment.NavHostFragment"
app:navGraph="@navigation/main_navigation"
app:defaultNavHost="true"/>
Actually, Navigation can't find NavController in FrameLayout. So replacing <FrameLayout>
with <fragment>
will make it work .
Add the following inside the <fragment>
tag -
android:name="androidx.navigation.fragment.NavHostFragment"
After doing the changes, the code will look similar to this -
<fragment
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:name="androidx.navigation.fragment.NavHostFragment"
app:navGraph="@navigation/main_navigation"
app:defaultNavHost="true"/>