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我一直在试图让回收视图与改造工作。我似乎从getRecipes（）方法中获得了JSON罚款，并且我的日志显示了一些数据在那里。从JSON使用改进和填充RecyclerView ArrayList的问题
但是，当我从onCreate（）调用getRecipes（）方法时，出现了一些问题。当我检查我的recipeList数组是否在onCreate中包含我的JSON结果时，它告诉我它是空的。为什么它会这样做，如果我的getRecipes（）方法中的日志显示数据在那里...？
不知道这是我的回收商视图还是我的改型或其他问题。一直试图找出几天，所以任何意见将不胜感激。
JSON https://d17h27t6h515a5.cloudfront.net/topher/2017/May/59121517_baking/baking.json
public class ItemListActivity extends AppCompatActivity {
private boolean mTwoPane;
public static final String LOG_TAG = "myLogs";
public static List<Recipe> recipeList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getRecipes();
setContentView(R.layout.activity_item_list);
getRecipes();
//Logging to check that recipeList contains data
if(recipeList.isEmpty()){
Log.d(LOG_TAG, "Is empty");
}else {
Log.d(LOG_TAG, "Is not empty");
}
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setTitle(getTitle());
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.item_list);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
SimpleItemRecyclerViewAdapter simpleItemRecyclerViewAdapter = new SimpleItemRecyclerViewAdapter(recipeList);
recyclerView.setAdapter(simpleItemRecyclerViewAdapter);
if (findViewById(R.id.item_detail_container) != null) {
mTwoPane = true;
}
}
public void getRecipes(){
String ROOT_URL = "https://d17h27t6h515a5.cloudfront.net/topher/2017/May/59121517_baking/";
Retrofit RETROFIT = new Retrofit.Builder()
.baseUrl(ROOT_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
RecipeService service = RETROFIT.create(RecipeService.class);
Call<List<Recipe>> call = service.getMyJson();
call.enqueue(new Callback<List<Recipe>>() {
@Override
public void onResponse(Call<List<Recipe>> call, Response<List<Recipe>> response) {
Log.d(LOG_TAG, "Got here");
if (!response.isSuccessful()) {
Log.d(LOG_TAG, "No Success");
}
Log.d(LOG_TAG, "Got here");
recipeList = response.body();
//Logging to check data is there
Log.v(LOG_TAG, "LOGS" + recipeList.size());
for (int i = 0; i < recipeList.size(); i++) {
String newString = recipeList.get(i).getName();
Ingredients[] ingredients = recipeList.get(i).getIngredients();
for(int j = 0; j < ingredients.length; j++){
Log.d(LOG_TAG, ingredients[j].getIngredient());
}
Steps[] steps = recipeList.get(i).getSteps();
for(int k = 0; k < steps.length; k++){
Log.d(LOG_TAG, steps[k].getDescription());
}
Log.d(LOG_TAG, newString);
}
}
@Override
public void onFailure(Call<List<Recipe>> call, Throwable t) {
Log.e("getRecipes throwable: ", t.getMessage());
t.printStackTrace();
}
});
}
public class SimpleItemRecyclerViewAdapter
extends RecyclerView.Adapter<SimpleItemRecyclerViewAdapter.ViewHolder> {
private final List<Recipe> mValues;
public SimpleItemRecyclerViewAdapter(List<Recipe> items) {
mValues = items;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_list_content, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.mItem = mValues.get(position);
holder.mContentView.setText(mValues.get(position).getName());
holder.mView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mTwoPane) {
Bundle arguments = new Bundle();
arguments.putString(ItemDetailFragment.ARG_ITEM_ID, holder.mItem.getId());
ItemDetailFragment fragment = new ItemDetailFragment();
fragment.setArguments(arguments);
getSupportFragmentManager().beginTransaction()
.replace(R.id.item_detail_container, fragment)
.commit();
} else {
Context context = v.getContext();
Intent intent = new Intent(context, ItemDetailActivity.class);
intent.putExtra(ItemDetailFragment.ARG_ITEM_ID, holder.mItem.getId());
context.startActivity(intent);
}
}
});
}
@Override
public int getItemCount() {
return mValues.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public View mView;
public TextView mContentView;
public Recipe mItem;
public ViewHolder(View view) {
super(view);
mView = view;
mContentView = (TextView) view.findViewById(R.id.content);
}
@Override
public String toString() {
return super.toString() + " '" + mContentView.getText() + "'";
}
}
}
RecipeService
public interface RecipeService {
@GET("baking.json")
Call<List<Recipe>> getMyJson();}
模型
配方
public class Recipe{
private Ingredients[] ingredients;
private String id;
private String servings;
private String name;
private String image;
private Steps[] steps;
public Ingredients[] getIngredients()
{
return ingredients;
}
public void setIngredients (Ingredients[] ingredients)
{
this.ingredients = ingredients;
}
public String getId()
{
return id;
}
public void setId (String id)
{
this.id = id;
}
public String getServings()
{
return servings;
}
public void setServings (String servings)
{
this.servings = servings;
}
public String getName()
{
return name;
}
public void setName (String name)
{
this.name = name;
}
public String getImage()
{
return image;
}
public void setImage (String image)
{
this.image = image;
}
public Steps[] getSteps()
{
return steps;
}
public void setSteps (Steps[] steps)
{
this.steps = steps;
}
@Override
public String toString()
{
return "[ingredients = "+ingredients+", id = "+id+", servings = "+servings+", name = "+name+", image = "+image+", steps = "+steps+"]";
}}
成分
public class Ingredients{
private String measure;
private String ingredient;
private String quantity;
public String getMeasure()
{
return measure;
}
public void setMeasure (String measure)
{
this.measure = measure;
}
public String getIngredient()
{
return ingredient;
}
public void setIngredient (String ingredient)
{
this.ingredient = ingredient;
}
public String getQuantity()
{
return quantity;
}
public void setQuantity (String quantity)
{
this.quantity = quantity;
}
@Override
public String toString()
{
return "[measure = "+measure+", ingredient = "+ingredient+", quantity = "+quantity+"]";
}}
步骤
public class Steps{
private String id;
private String shortDescription;
private String description;
private String videoURL;
private String thumbnailURL;
public String getId()
{
return id;
}
public void setId (String id)
{
this.id = id;
}
public String getShortDescription()
{
return shortDescription;
}
public void setShortDescription (String shortDescription)
{
this.shortDescription = shortDescription;
}
public String getDescription()
{
return description;
}
public void setDescription (String description)
{
this.description = description;
}
public String getVideoURL()
{
return videoURL;
}
public void setVideoURL (String videoURL)
{
this.videoURL = videoURL;
}
public String getThumbnailURL()
{
return thumbnailURL;
}
public void setThumbnailURL (String thumbnailURL)
{
this.thumbnailURL = thumbnailURL;
}
@Override
public String toString()
{
return "[id = "+id+", shortDescription = "+shortDescription+", description = "+description+", videoURL = "+videoURL+", thumbnailURL = "+thumbnailURL+"]";
}}
日志
https://gist.github.com/2triggers/12b6eeb32ed8909ab50bbadd4742d7f7
尝试调试并检查Log.v（LOG_TAG，“LOGS”+ recipeList.size（））;大小是多少？ –