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Ну, я новичок в GSON, и я попытался десериализовать ответ JSON из блога Wordpress.Deserialising вложенный ответ JSON с GSON
Вот ответ JSON:
{
"status": "ok",
"count": 10,
"pages": 484,
"category": {
"id": "",
"slug": "",
"title": "",
"description": "",
"parent": 0,
"post_count": 4837
},
"posts": [{
"id": "",
"type": "",
"slug": "",
"url": "",
"status": "",
"title": "",
"title_plain": "",
"content": "",
"excerpt": "",
"date": "",
"modified": "",
"categories": [{
"id": "",
"slug": "",
"title": "",
"description": "",
"parent": "",
"post_count": ""
}, {
"id": "",
"slug": "",
"title": "",
"description": "",
"parent": "",
"post_count": ""
}, {
"id": "",
"slug": "",
"title": "",
"description": "",
"parent": "",
"post_count": ""
}],
"tags": [{
"id": "",
"slug": "",
"title": "",
"description": "",
"post_count": ""
}],
"author": {
"id": "",
"slug": "",
"name": "",
"first_name": "",
"last_name": "",
"nickname": "",
"url": "",
"description": ""
},
"comments": [],
"attachments": [{
"id": "",
"url": "",
"slug": "",
"title": "",
"description": "",
"caption": "",
"parent": "",
"mime_type": "",
"images": {
"full": {
"url": "",
"width": "",
"height": ""
},
"thumbnail": {
"url": "",
"width": "",
"height": ""
},
"medium": {
"url": "",
"width": "",
"height": ""
},
"medium_large": {
"url": "",
"width": "",
"height": ""
},
"large": {
"url": "",
"width": "",
"height": ""
},
"tie-small": {
"url": "",
"width": "",
"height": ""
},
"tie-medium": {
"url": "",
"width": "",
"height": ""
},
"tie-large": {
"url": "",
"width": "",
"height": ""
},
"slider": {
"url": "",
"width": "",
"height": ""
},
"big-slider": {
"url": "",
"width": "",
"height": ""
}
}
}],
"comment_count": 0,
"comment_status": "",
"thumbnail": "",
"custom_fields": {
"tie_sidebar_pos": [
""
],
"tie_post_slider": [
""
]
},
"thumbnail_size": "",
"thumbnail_images": {
"full": {
"url": "",
"width": "",
"height": ""
},
"thumbnail": {
"url": "",
"width": "",
"height": ""
},
"medium": {
"url": "",
"width": "",
"height": ""
},
"medium_large": {
"url": "",
"width": "",
"height": ""
},
"large": {
"url": "",
"width": "",
"height": ""
},
"tie-small": {
"url": "",
"width": "",
"height": ""
},
"tie-medium": {
"url": "",
"width": "",
"height": ""
},
"tie-large": {
"url": "",
"width": "",
"height": ""
},
"slider": {
"url": "",
"width": "",
"height": ""
},
"big-slider": {
"url": "",
"width": "",
"height": ""
}
}
}]
}А вот мой проект коды:
ItemObject.java
import com.google.gson.annotations.SerializedName;
public class ItemObject {
@SerializedName("id")
private String postID;
@SerializedName("title")
private String postTitle;
@SerializedName("except")
private String except;
public ItemObject(String postID, String postTitle, String except) {
this.postID = postID;
this.postTitle = postTitle;
this.except = except;
}
public String getpostID() {
return postID;
}
public String getPostTitle() {
return postTitle;
}
public String getExcept() {
return except;
}
}RecyclerViewAdapter.java
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.List;
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewHolders> {
private List<ItemObject> itemList;
private Context context;
public RecyclerViewAdapter(Context context, List<ItemObject> itemList) {
this.itemList = itemList;
this.context = context;
}
@Override
public RecyclerViewHolders onCreateViewHolder(ViewGroup parent, int viewType) {
View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, null);
RecyclerViewHolders rcv = new RecyclerViewHolders(layoutView);
return rcv;
}
@Override
public void onBindViewHolder(RecyclerViewHolders holder, int position) {
holder.postID.setText(itemList.get(position).getpostID());
holder.postTitle.setText(itemList.get(position).getPostTitle());
holder.contentExcept.setText(itemList.get(position).getExcept());
}
@Override
public int getItemCount() {
return this.itemList.size();
}
}RecyclerViewHolders.java
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;
public class RecyclerViewHolders extends RecyclerView.ViewHolder implements View.OnClickListener{
public TextView postID;
public TextView postTitle;
public TextView contentExcept;
public RecyclerViewHolders(View itemView) {
super(itemView);
itemView.setOnClickListener(this);
postID = (TextView)itemView.findViewById(R.id.post_id);
postTitle = (TextView)itemView.findViewById(R.id.post_title);
contentExcept = (TextView)itemView.findViewById(R.id.except);
}
@Override
public void onClick(View view) {
}
}SimpleDividerItemDecoration.java
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.View;
public class SimpleDividerItemDecoration extends RecyclerView.ItemDecoration {
private Drawable mDivider;
public SimpleDividerItemDecoration(Context context) {
mDivider = ContextCompat.getDrawable(context, R.drawable.line_divider);
}
@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
int left = parent.getPaddingLeft();
int right = parent.getWidth() - parent.getPaddingRight();
int childCount = parent.getChildCount();
for (int i = 0; i < childCount; i++) {
View child = parent.getChildAt(i);
RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
int top = child.getBottom() + params.bottomMargin;
int bottom = top + mDivider.getIntrinsicHeight();
mDivider.setBounds(left, top, right, bottom);
mDivider.draw(c);
}
}
}MainActivity.java
import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private final String TAG = "MainActivity";
private RecyclerView recyclerView;
private LinearLayoutManager layoutManager;
private RecyclerViewAdapter adapter;
public static final String POST_TITLE = "post_title";
public static final String EXCEPT = "except";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
recyclerView.addItemDecoration(new SimpleDividerItemDecoration(this));
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerView.setLayoutManager(layoutManager);
requestJsonObject();
// Swipe Refresh Layout
final SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swifeRefresh);
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
requestJsonObject();
mSwipeRefreshLayout.setRefreshing(false);
}
});
}
private void requestJsonObject(){
RequestQueue queue = Volley.newRequestQueue(this);
String url ="JSON URL";
StringRequest stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Response " + response);
GsonBuilder builder = new GsonBuilder();
Gson mGson = builder.create();
List<ItemObject> posts = new ArrayList<ItemObject>();
posts = Arrays.asList(mGson.fromJson(response, ItemObject[].class));
adapter = new RecyclerViewAdapter(MainActivity.this, posts);
recyclerView.setAdapter(adapter);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d(TAG, "Error " + error.getMessage());
}
});
queue.add(stringRequest);
}
}После того как я запустить свой проект, я получаю эту ошибку из LogCat:
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $
Любая помощь будет оценена. Спасибо.
Вам нужен объект, который у вас есть список пунктов – Raghunandan
@Raghunandan Как добавить объект? –
Вы пытаетесь показать данные под клавишей 'posts'? –