我有一个Firebase数据库,正在从中获取数据,但是我无法显示获取的数据(某些文本和img)
这是我在片段中的代码:
public class Tab_0 extends Fragment {
RecyclerView mRecyclerView;
FirebaseDatabase mFirebaseDataBase;
DatabaseReference mRef;
DatabaseReference mRefA;
@SuppressLint("RestrictedApi")
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState){
View view = inflater.inflate(R.layout.tab0,container,false);
mRecyclerView = view.findViewById(R.id.recyclerview);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
mRecyclerView.setHasFixedSize(true);
mFirebaseDataBase = FirebaseDatabase.getInstance();
mRef = FirebaseDatabase.getInstance().getReferenceFromUrl("--my url here--");
mRef = mRef.child("pictures");
FirebaseRecyclerAdapter<model,ViewHolder> FirebaseRecyclerAdapter = new FirebaseRecyclerAdapter<model,ViewHolder>(
model.class,
R.layout.card,
ViewHolder.class,
mRef
){
@Override
protected void populateViewHolder(ViewHolder viewHolder,model model,int position){
viewHolder.setDetails( getContext() , model.getImage());
}
};
mRecyclerView.setAdapter(FirebaseRecyclerAdapter);
return view;
}
,我是从LogCat那里得到的
未附加适配器,跳过布局
我之前在建议中(在另一个问题中)在 onCreateView 方法之外使用了此方法,但是什么也没有
@Override
public void onStart(){
super.onStart();
FirebaseRecyclerAdapter<model,ViewHolder> FirebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<model,ViewHolder>(
model.class,
R.layout.card,
ViewHolder.class,
mRef
){
@Override
protected void populateViewHolder(ViewHolder viewHolder,model model,int position){
viewHolder.setImage( getContext() , model.getImage());
}
};
mRecyclerView.setAdapter(FirebaseRecyclerAdapter);
}
但什么都没显示
viewHolder
public class ViewHolder extends RecyclerView.ViewHolder {
View mView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
mView = itemView;
}
public void setDetails(Context ctx, String image){
ImageView img = mView.findViewById(R.id.img);
Picasso.get().load(image).into(img);
}}
我在模型类上设置了getter和setter方法。(对于持有者类,该变量是必需的)
答案 0 :(得分:1)
好,我知道了
tab_0 xml文件是这样的:
tools:context=".Tab_0"
解决方案是我没有提供相关内容:
{{1}}
感谢 StackOverFlowrs!