Recyclerview没有LayoutManager android studio
我试图在我的android应用程序中实现RecyclerView,但它给了我一个错误 “RecyclerView没有布局管理器” 即使我在代码中初始化了它。我的java和xml文件:Recyclerview没有LayoutManager android studio,android,android-recyclerview,Android,Android Recyclerview,我试图在我的android应用程序中实现RecyclerView,但它给了我一个错误 “RecyclerView没有布局管理器” 即使我在代码中初始化了它。我的java和xml文件: @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inf
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_list, container, false);
mRecyclerView = rootView.findViewById(R.id.recyclerView);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
mRecyclerView.setLayoutManager(layoutManager);
mAdapter = new CustomAdapter(mDataset);
mRecyclerView.setAdapter(mAdapter);
return rootView;
}
XML
您不能将信号活动用于recy。。。。和主要活动。请创建一个新的xml文件,如list_file您可以尝试将RecyclerView.LayoutManager
更改为LinearLayoutManager
吗。这应该可以解决问题,如果不是,您还可以粘贴CustomAdapter
类的代码。我尝试使用新的xml文件,但它会给我相同的错误
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".List"
android:background="@color/black">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="495dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="parent"/
</androidx.constraintlayout.widget.ConstraintLayout>