试着在RecycleView Glide中加载图像，而Picasso在适配器中没有加载任何内容

Question

我试图使用glide在一个RecyclerView中加载4个图像，但它没有加载任何图像。我试过毕加索但得到了同样的结果。App有互联网权限。如果我在mainactivity中运行picasso和glide，它们工作得很好，但在我的适配器中不工作。如果我在适配器中使用抽屉，它会起作用。如果我将ImageView替换为TextView，它就能工作。只有使用glide和picasso失败了，我不知道我错在哪里，任何帮助都将是感激的。这是我的代码：

片段1.xml

<LinearLayout
    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=".MainActivity"
    android:orientation="vertical">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

item_list.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/datoId"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

片段1.Java

public class Fragment1 extends Fragment {

    ArrayList<String> listaDatos;
    RecyclerView recycler;
    String url1 = "https://image.tmdb.org/t/p/w500/2xFicIrFGqsy503rcuGUw6PAacw.jpg";
    String url2 = "https://image.tmdb.org/t/p/w500/bnuC6hu7AB5dYW26A3o6NNLlIlE.jpg";
    String url3 = "https://image.tmdb.org/t/p/w500/rkuvJnamPl3xW9wKJsIS6qkmOCW.jpg";
    String url4 = "https://image.tmdb.org/t/p/w500/orzPlWUbf0S5HeWmpP3TeHvduwn.jpg";

    public Fragment1() {
        // Required empty public constructor
    }


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment_1, container, false);
        recycler = (RecyclerView) view.findViewById(R.id.recycler);
        recycler.setLayoutManager(new GridLayoutManager(getContext(),2));

        listaDatos = new ArrayList<String>();
        listaDatos.add(url1);
        listaDatos.add(url2);
        listaDatos.add(url3);
        listaDatos.add(url4);

        Adaptador adaptador = new Adaptador(listaDatos);
        recycler.setAdapter(adaptador);

        return view;
    }
}

java（适配器）

public class Adaptador extends RecyclerView.Adapter<Adaptador.ViewHolderDatos> {

    ArrayList<String> listaDatos;


    public Adaptador(ArrayList<String> listaDatos) {
        this.listaDatos = listaDatos;
    }

    @NonNull
    @Override
    public ViewHolderDatos onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list, null, false);
        return new ViewHolderDatos(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolderDatos holder, int position) {
        holder.asignarDatos(listaDatos.get(position));
    }

    @Override
    public int getItemCount() {
        return listaDatos.size();
    }

    public class ViewHolderDatos extends RecyclerView.ViewHolder {

        ImageView caratula;

        public ViewHolderDatos(@NonNull View itemView) {
            super(itemView);
            caratula = itemView.findViewById(R.id.datoId);
        }

        public void asignarDatos(String s) {
            //caratula.setImageResource(R.drawable.ic_launcher_foreground); // Works
            //Picasso.get().load(s).into(caratula); //Not works
            //caratula.setText(s); // Swapping ImageView for TextView, this works 

            Glide.with(caratula.getContext())
                    .load(s)
                    .error(R.drawable.ic_launcher_background)
                    .placeholder(R.drawable.ic_launcher_foreground)
                    .into(caratula); // Not works

        }
    }
}

Answer 1

试试看，这里正是你需要适应你的项目的地方。也检查您的实现。如所示的示例。最好的方法是并排检查两个代码。干杯！