Question

当我创建模型类的对象时。我得到这个错误。我不知道如何将本地图像从可绘制对象传递到模型类。

这是我的模型课。

ggplot

这是我的适配器类代码。我正在将模型类传递给适配器。

public class Drawer {

private String image;
private String title;

public Drawer(String image, String title) {
    this.image = image;
    this.title = title;
}

public String getImage() {
    return image;
}

public void setImage(String image) {
    this.image = image;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}
}

}

这就是我创建模型类对象的方式。

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

private List<Drawer> drawerList;
ItemNavigationDrawerBinding binding;

public DrawerAdapter(List<Drawer> drawerList) {
    this.drawerList = drawerList;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    binding = DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), R.layout.item_navigation_drawer, parent, false);
    return new ViewHolder(binding);
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

    Glide.with(holder.itemView.getContext()).load(drawerList.get(position).getImage()).into(holder.binding.imgMain);
    holder.binding.tvMain.setText(drawerList.get(position).getTitle());

}

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

public class ViewHolder extends RecyclerView.ViewHolder {

    ItemNavigationDrawerBinding binding;

    private ViewHolder(@NonNull ItemNavigationDrawerBinding binding) {
        super(binding.getRoot());
        this.binding = binding;
    }
}

Answer 1

首先，要将Drawable保存到类中，我们必须使用整数值存储Drawable id，然后在适配器上，将drawable设置为imageview而不是drawable id。

 class Drawer {

    private int image;
    private String title;

    public Drawer(int image, String title) {
        this.image = image;
        this.title = title;
    }

    public int getImage() {
        return image;
    }

    public void setImage(int image) {
        this.image = image;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

在适配器上更换 Glide.with（holder.itemView.getContext（））。load（drawerList.get（position）.getImage（））。into（holder.binding.imgMain）;

与

 Glide.with(holder.itemView.getContext()).load(holder.itemView.getContext().getDrawable(drawerList.get(position).getImage())).into(holder.binding.imgMain);

最后添加这样的项目

ArrayList<Drawer> drawerList = new ArrayList<>();
 drawerList.add(new Drawer(R.drawable.your_drawable,"your title"));

如何将本地可绘制图像传递给模型类？

1 个答案: