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我有一個recyclerView必須顯示卡的列表,但它不! 有一個食譜數組列表傳遞給適配器以顯示它們作爲cardviews,調試中的所有內容似乎都沒問題,但它不會在屏幕上顯示任何內容。 ViewHolder:RecyclerView應該顯示cardViews不顯示任何東西
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.nd.ameer.bake.R;
public class RecipeViewHolder extends RecyclerView.ViewHolder {
public TextView titleTextView;
public ImageView coverImageView;
public RecipeViewHolder(View v) {
super(v);
titleTextView = (TextView) v.findViewById(R.id.titleTextView);
coverImageView = (ImageView) v.findViewById(R.id.recipeImageView);
}
}
適配器:
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.bumptech.glide.Glide;
import com.example.nd.ameer.bake.R;
import com.example.nd.ameer.bake.models.Recipe;
import com.example.nd.ameer.bake.views.holders.RecipeViewHolder;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
public class RecipeAdapter extends
RecyclerView.Adapter<RecipeViewHolder> {
ArrayList<Recipe> recipes = new ArrayList<>();
Context context;
public RecipeAdapter(ArrayList<Recipe> recipes, Context context) {
this.recipes = recipes;
this.context = context;
}
@Override
public RecipeViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.recipe_item, parent, false);
return new RecipeViewHolder(view);
}
@Override
public void onBindViewHolder(RecipeViewHolder holder, int position) {
holder.coverImageView.setImageResource(R.color.colorPrimaryLight);
holder.titleTextView.setText(recipes.get(position).getName());
}
@Override
public int getItemCount() {
return recipes.size();
}
}
片段onCreateView:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
rootView = inflater.inflate(R.layout.fragment_recipe, container, false);
createRecipes();
recyclerView = (RecyclerView) rootView.findViewById(R.id.rv_recipe);
recyclerView.setHasFixedSize(true);
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
if (recipes.size() > 0 & recyclerView != null) {
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(new RecipeAdapter(recipes, getContext()));
}
return rootView;
}
方法createRecipes();創建一個配方列表,然後它傳遞給適配器。
as you can see, the recipes size is 4, so it's not the problem
你確定'recipes'列表的大小不是0嗎? –
是的它總是4,相同的列表 –
你可以發佈你的createRecipes()代碼和logcat日誌 –