使用凌空json数据的片段中的Recyclerview？
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【中文标题】使用凌空json数据的片段中的Recyclerview？【英文标题】：Recyclerview in fragmnet using volley json data? 【发布时间】：2016-11-04 13:12:44 【问题描述】：请任何人解释 RecyclerView 在片段中使用 volley 获取 json 数据。 我已经在下面提到了链接编码Google recyclerview in fragment
这是我在 android 中的第一个项目，所以我无法理解该编码。 请任何人帮助我。
我的fragmnet编码：
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View drawer = inflater.inflate(R.layout.fragment_progress, container, false);
orderLists = new ArrayList<>();
getProgressData();
recyclerView = (RecyclerView) drawer.findViewById(R.id.progress);
adapter = new ProgressOrderListAdapter(orderLists, this);
adapter.clearAdaptor();
recyclerView.setAdapter(adapter);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return recyclerView;
private void getProgressData()
String mobilecustomertoken = SharedPreferencesManager.readPreferenceString("MobileCustomerToken", "D/N");
JSONObject progressData = new JSONObject();
try
progressData.put("mobilecustomertoken", mobilecustomertoken);
JsonObjectRequest progressObject = new JsonObjectRequest(1, Common.OrderDetails + "progress", progressData, new Response.Listener<JSONObject>()
@Override
public void onResponse(JSONObject progressResponse)
Log.d("Responseprogress", progressResponse.toString());
try
int status = progressResponse.getInt("status");
if(status == 1)
progressOrderProgress(progressResponse);
catch (JSONException e)
e.printStackTrace();
, new Response.ErrorListener()
@Override
public void onErrorResponse(VolleyError error)
error.printStackTrace();
Log.d("Response", "PROGRESS ERROR");
);
progressObject.setShouldCache(false);
ServiceBellApp.getInstance().addToRequestQueue(progressObject);
catch (JSONException localJSONException)
localJSONException.printStackTrace();
return;
private void progressOrderProgress(JSONObject progressResponse) throws JSONException
JSONArray result = progressResponse.getJSONArray("orderdata");
OrderList orderListModule = new OrderList();
for(int i=0; i<result.length(); i++)
JSONObject orderData = result.getJSONObject(i);
orderListModule.setPackage_name(orderData.getString("package_name"));
orderListModule.setOrderdate(orderData.getString("orderdate"));
orderListModule.setServicedate(orderData.getString("servicedate"));
orderListModule.setServicetime(orderData.getString("servicetime"));
orderListModule.setOrderid(orderData.getString("orderid"));
orderListModule.setOrdstatus(orderData.getString("ordstatus"));
orderListModule.setOrderamount(orderData.getInt("orderamount"));
orderLists.add(orderListModule);
我的适配器代码：
public class OrderListAdapter extends RecyclerView.Adapter<OrderListAdapter.ViewHolder>
List<OrderList> List;
private FragmentPending mContext;
public OrderListAdapter(List<OrderList> List, FragmentPending context)
this.mContext = context;
this.List = List;
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.order_list_view, null);
ViewHolder holder = new ViewHolder(view);
// this is where the each item is inflated.
return holder;
@Override
public void onBindViewHolder(ViewHolder holder, int position)
OrderList orderListsPos = List.get(position);
// this is where the data for each item is assigned
holder.textViewPackageName.setText(orderListsPos.getPackage_name());
holder.textOrderdate.setText(orderListsPos.getOrderdate());
holder.textServicedate.setText(orderListsPos.getServicedate());
holder.textServicetime.setText(orderListsPos.getServicetime());
holder.textOrderid.setText(orderListsPos.getOrderid());
holder.textOrderamount.setText("Rs." + orderListsPos.getOrderamount());
holder.textStatus.setText(orderListsPos.getOrdstatus());
@Override
public int getItemCount()
return List.size();
public void clearAdaptor()
List.clear();
public class ViewHolder extends RecyclerView.ViewHolder
public TextView textViewPackageName;
public TextView textServicedate;
public TextView textServicetime;
public TextView textOrderdate;
public TextView textOrderid;
public TextView textOrderamount;
public TextView textStatus;
public ViewHolder(View itemView)
super(itemView);
textViewPackageName = (TextView) itemView.findViewById(R.id.productName);
textOrderdate = (TextView) itemView.findViewById(R.id.orderdate);
textOrderid = (TextView) itemView.findViewById(R.id.orderno);
textOrderamount = (TextView) itemView.findViewById(R.id.orderprice);
textStatus = (TextView) itemView.findViewById(R.id.orderstatus);
【问题讨论】：
该链接的哪个部分您不理解？ 概念 5. 为每个视图设置样式并添加一个 RecyclerView 这几乎是直截了当的.. 设计每一行？你对哪一部分有疑问？ 我的疑惑是recyclerview和fragment如何连接 我有一个问题要问你，你有没有在Activity 上与RecyclerView 合作过？
【参考方案1】：
首先你需要四样东西
1 ) 包含每个回收站视图布局项的布局
2 ) 用于创建每个布局的视图持有者
3 ) 一个模型类来保存数据
4 ) 处理每个布局项的数据的回收器适配器
首先创建一个布局项
例如，让我们创建一个只有TextView 的视图
XML
每个_item.xml
<TextView
android:id="@+id/name"
android:layout_
android:layout_
android:layout_margin="2dp"
android:gravity="start|center_vertical"
android:textColor="@color/white"
android:textSize="18sp" />
现在让我们创建一个视图持有者 我将发布视图持有者和 RecyclerAdaptor 的代码
public class Adaptor extends RecyclerView.Adapter<Adaptor.ViewHolder>
List<Model> List = Collections.emptyList();
private Context mContext;
private LayoutInflater inflater;
public Adaptor(Context context, List<Model> List)
inflater = LayoutInflater.from(context);
this.mContext = context;
this.List = List;
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
View view = inflater.inflate(R.layout.each_item, parent, false);
final ViewHolder holder = new ViewHolder(view);
// this is where the each item is inflated.
return holder;
@Override
public void onBindViewHolder(WinnersViewHolder holder, int position)
Model mModel = List.get(position);
// this is where the data for each item is assigned
holder.nameView.setText("" + mModel.getName());
@Override
public int getItemCount()
return List.size();
public void clearAdaptor()
List.clear();
public class ViewHolder extends RecyclerView.ViewHolder
protected TextView nameView;
public ViewHolder(View itemView)
super(itemView);
this.nameView = (TextView) itemView.findViewById(R.id.name);
现在是模型类
public class Model
private String name;
public String getName()
return name;
public void setName(String name)
this.name= name;
现在后端已经完成，让我们在 Fragment 上实现它
List<Model> List = new ArrayList<>();
private RecyclerView mRecyclerView;
private Adaptor adaptor;
public Fragment()
// constructor of fragment
// Required empty public constructor
在onCreatView()中获取recyclerView的id
View fragmentView = inflater.inflate(R.layout.fragment_layout, container, false);
mRecyclerView = (RecyclerView) fragmentView .findViewById(R.id.recycler_view);
然后通过创建对象将数据传递给Adaptor
adaptor = new Adaptor(getContext(), List);
adaptor.clearAdaptor();
mRecyclerView.setAdapter(adaptor);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
您现在完成了，唯一未决的事情是如果您正在访问数据表单服务器调用notifyDataSetChanged() 或adaptor = new Adaptor(getContext(), getList()); 其中getList() 返回模型数据并且不调用adaptor.clearAdaptor()。
希望这会有所帮助..
编辑
您可以通过两种方式对每个布局项进行充气 .. 一种在上方，第二种在 onCreateViewHolder
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.each_item, null);
【讨论】：
我在 inflater = LayoutInflater.from(context); 中得到错误适配器中的这一行 最后我得到这个错误 java.lang.Throwable: Explicit terminate method 'end' not called。你有什么想法吗？ 你能发布你的代码和可能的 LogCat 吗.. 这可能是与 JSON Volley @vinothkumar 相关的一些错误 @vinothkumar 如果这个答案有帮助，请投票表示感谢。希望我也能解决当前问题 我会试试这个方法【参考方案2】：查看此链接 对初学者从开始理解概念到掌握 RecyclerView 非常有帮助。
https://github.com/codepath/android_guides/wiki/Using-the-RecyclerView
希望这有助于您理解回收站视图的概念。
【讨论】：
我会检查这个例子 我想要片段好友中的recyclerview【参考方案3】：RecycerView + Fragment + Volley
片段代码：
public class DogListFragment extends Fragment
private RecyclerView rv;
private StaggeredGridLayoutManager llm;
private DogListAdapter adapter;
private ArrayList<DogModel> dogList;
private Context context;
public static DogListFragment getInstance()
return new DogListFragment();
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
dogList = new ArrayList<>();
adapter = new DogListAdapter(context, dogList, this);
getListFromServer();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState)
View view = inflater.inflate(R.layout.fragment_dog_list, parent, false);
rv = view.findViewById(R.id.rv);
llm = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
rv.setLayoutManager(llm);
rv.setAdapter(adapter);
return view;
public void getListFromServer()
String url = "https://dog.ceo/api/breed/hound/images/random/20";
RequestQueue requestQueue = Volley.newRequestQueue(context);
StringRequest request = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>()
@Override
public void onResponse(String response)
try
JSONObject jsonObject = new JSONObject(response);
JSONArray array = jsonObject.getJSONArray("message");
for(int i=0;i<array.length();i++)
String imageUrl = array.getString(i);
dogList.add(new DogModel(imageUrl));
adapter.updateDataSet(dogList);
catch (JSONException e)
e.printStackTrace();
,
new Response.ErrorListener()
@Override
public void onErrorResponse(VolleyError error)
);
requestQueue.add(request);
完整代码
Woof Repository
它有以下实现
通过接口进行分片通信 通过重用片段 getSupportFragmentManager().findFragmentByTag(TAG) 哪个生命周期方法应该有 API 调用，以便它被调用 一次 如何在 Fragment 中保存 RecyclerView 状态（滚动位置 + 内容） RecyclerView 中的分页 休息呼叫（排球） 图像渲染（滑动） JSON 解析【讨论】：
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