Question

java.lang.IllegalArgumentException: ID does not reference a View inside this Activity

    mBtHome.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {



                    Navigation.findNavController(getActivity(), R.id.homePageFragment);
                }
            });

startDestination片段内的mBtHome按钮

导航图xml文件。

<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/nav_file"
    app:startDestination="@id/mainFragment">
    <fragment
        android:id="@+id/mainFragment"
        android:name="com.example.libin.navigationhelphertest.ui.main.MainFragment"
        android:label="main_fragment"
        tools:layout="@layout/main_fragment">
        <action
            android:id="@+id/action_mainFragment_to_homePageFragment"
            app:destination="@id/homePageFragment" />
        <action
            android:id="@+id/action_mainFragment_to_usersListFragment"
            app:destination="@id/usersListFragment" />
    </fragment>
    <fragment
        android:id="@+id/homePageFragment"
        android:name="com.example.libin.navigationhelphertest.ui.main.HomePageFragment"
        android:label="fragment_home_page"
        tools:layout="@layout/fragment_home_page" />
    <fragment
        android:id="@+id/usersListFragment"
        android:name="com.example.libin.navigationhelphertest.ui.main.UsersListFragment"
        android:label="fragment_users_list"
        tools:layout="@layout/fragment_users_list" />
</navigation>

在MainActivity xml文件NavHostFragment中添加了导航/ nav_file，还添加了defaultNavHost =“ true”

Answer 1

根据上面的代码，单击按钮即可从一个片段导航到另一个片段，

Navigation类为您提供了createNavigateOnClickListner（）方法，您只需传递片段操作ID。

尝试以下代码

 mBtHome.setOnClickListener(Navigation.createNavigateOnClickListener(R.id.action_mainFragment_to_homePageFragment));

Answer 2

R.id.homePageFragment不是NavHostFragment 像小偷一样

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/fragment_container_view"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:defaultNavHost="true"
            app:navGraph="@navigation/motion_layout_graph" />

并调用这样的代码

                Navigation.findNavController(requireActivity(), R.id.fragment_container_view).navigate(R.id.show_one)

导航控制器从startDestination片段导航获取异常

2 个答案: