我已经创建了回收站视图,并且已经在Gradle文件中导入了所有必需的依赖项。我的目标SDK是29.so,所以我所有的依赖关系都在布局文件中很好地包含了androidx,我也创建了“ list”的id,但我不知道为什么它显示错误。先感谢您。
package com.napps.wallpaper;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
public class fragment_wallpaper extends Fragment {
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
RecyclerView.Adapter adapter;
View view;
public fragment_wallpaper(){
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_wallpaper,container,false);
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
recyclerView=view.findViewById(R.id.list); //this where i am getting error
recyclerView.setHasFixedSize(true);
layoutManager=new LinearLayoutManager(this.getActivity());
recyclerView.setLayoutManager(layoutManager);
adapter=new imageAdapter(this.getActivity(),array_class.arrayurl);
recyclerView.setAdapter(adapter);
}
}
尝试此操作
通常,您不是在初始化视图,而是在创建引起问题的新变量。希望能帮助到你。快乐编码:)
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
view= inflater.inflate(R.layout.fragment_wallpaper,container,false);
return view;
}
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