Question

所以我要在android studio中构建一个RecyclerView，以显示对象列表中的图像和标题。

这是适配器和视图：

public class FavoritesAdapter extends RecyclerView.Adapter<FavoritesAdapter.ViewHolder>{

private List<RecipeModel> list;
private Context context;

public FavoritesAdapter(List<RecipeModel> list, Context context) {
    this.list = list;
    this.context = context;
}



public class ViewHolder extends RecyclerView.ViewHolder{

    private CircleImageView circleImageView;
    private TextView title;
    private RelativeLayout relativeLayout;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        circleImageView=(CircleImageView) itemView.findViewById(R.id.favoritesCircleImage);
        title=(TextView) itemView.findViewById(R.id.favoritesTitle);
        relativeLayout=(RelativeLayout) itemView.findViewById(R.id.favorites_layout);
    }
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view= LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_favorites_list_item, viewGroup, false);
    ViewHolder holder=new ViewHolder(view);
    return holder;
}

@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
    Glide.with(context)
            .asBitmap()
            .load(list.get(i).getImage_url())
            .into(viewHolder.circleImageView);

    viewHolder.title.setText(list.get(i).getTitle());

    viewHolder.relativeLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //Clicking on the item
        }
    });
}

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

}

这是活动的XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".FavoritesActivity">

    <view class="android.support.v7.app.AlertController$RecycleListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/recyclerViewFavorites">

    </view>

</RelativeLayout>

列表项的XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="15dp"
    android:id="@+id/favorites_layout">

    <de.hdodenhof.circleimageview.CircleImageView
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:id="@+id/favoritesCircleImage"
        android:src="@mipmap/ic_launcher"/>

    <TextView
        android:id="@+id/favoritesTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="110dp"
        android:layout_marginTop="25dp"
        android:text="DummyText"
        android:textColor="#000"
        android:textSize="17sp" />

</RelativeLayout>

这是实现recyclerview的代码段：

private void initRecyclerView(){
    RecyclerView recyclerView=findViewById(R.id.recyclerViewFavorites);
    FavoritesAdapter favoritesAdapter=new FavoritesAdapter(recipeModelList, getApplicationContext());
    recyclerView.setAdapter(favoritesAdapter);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
}

但是，当我启动应用程序并打开活动时，应用程序崩溃。该列表很好，它没有设置为null我已经检查过了。

有什么想法吗？

Answer 1

在XML布局中，您使用了RecycleListView。但是，在initRecyclerView（）方法中，您已经初始化了RecylerView。因此，请使用RecyclerView而不是RecycleListView。 RecyclerView和RecycleListView是两件事。

替换

<view class="android.support.v7.app.AlertController$RecycleListView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/recyclerViewFavorites">
</view>

使用

<android.support.v7.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/recyclerViewFavorites"/>

启动RecyclerView时应用程序崩溃

1 个答案: