嗨，请帮我根据json响应类型扩充布局 我正在尝试将http://androidcss.com/android/fetch-json-data-android/本教程与此https://github.com/codepath/android_guides/wiki/Heterogenous-Layouts-inside-RecyclerView
合并但我面临一些问题
我的 json回复表格
[
{ "type":"sports",
"image":"http://example.com/image.jpg",
"name":"Super Commando Dhruva"
},
{
"type":"health",
"image":"http://example.com/image.jp",
"name":"Parmanu"
}
]
MainActivity
package com.androidcss.jsonexample;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
// CONNECTION_TIMEOUT and READ_TIMEOUT are in milliseconds
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
private RecyclerView mRVFishPrice;
private AdapterFish mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Make call to AsyncTask
new AsyncLogin().execute();
}
private class AsyncLogin extends AsyncTask<String, String, String> {
ProgressDialog pdLoading = new ProgressDialog(MainActivity.this);
HttpURLConnection conn;
URL url = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
pdLoading.setMessage("\tLoading...");
pdLoading.setCancelable(false);
pdLoading.show();
}
@Override
protected String doInBackground(String... params) {
try {
// Enter URL address where your json file resides
// Even you can make call to php file which returns json data
url = new URL("http://example.com/response.json");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return e.toString();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("GET");
// setDoOutput to true as we recieve data from json file
conn.setDoOutput(true);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return e1.toString();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return ("unsuccessful");
}
} catch (IOException e) {
e.printStackTrace();
return e.toString();
} finally {
conn.disconnect();
}
}
@Override
protected void onPostExecute(String result) {
//this method will be running on UI thread
pdLoading.dismiss();
List<DataFeed> data=new ArrayList<>();
pdLoading.dismiss();
try {
JSONArray jArray = new JSONArray(result);
// Extract data from json and store into ArrayList as class objects
for(int i=0;i<jArray.length();i++){
JSONObject json_data = jArray.getJSONObject(i);
DataFeed fishData = new DataFeed();
fishData.fishImage= json_data.getString("image");
fishData.fishName= json_data.getString("type");
fishData.catName= json_data.getString("name");
// fishData.sizeName= json_data.getString("size_name");
//fishData.price= json_data.getInt("price");
data.add(fishData);
}
// Setup and Handover data to recyclerview
mRVFishPrice = (RecyclerView)findViewById(R.id.fishPriceList);
mAdapter = new AdapterFish(MainActivity.this, data);
mRVFishPrice.setAdapter(mAdapter);
mRVFishPrice.setLayoutManager(new LinearLayoutManager(MainActivity.this));
} catch (JSONException e) {
Toast.makeText(MainActivity.this, e.toString(), Toast.LENGTH_LONG).show();
}
}
}
}
我的适配器
package com.androidcss.jsonexample;
import android.content.Context;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.squareup.picasso.Picasso;
import java.util.Collections;
import java.util.List;
public class AdapterFish extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private LayoutInflater inflater;
List<DataFeed> data= Collections.emptyList();
DataFeed current;
int currentPos=0;
private final int USER = 0, IMAGE = 1;
// create constructor to innitilize context and data sent from MainActivity
public AdapterFish(Context context, List<DataFeed> data){
this.context=context;
inflater= LayoutInflater.from(context);
this.data=data;
}
// return total item from List
@Override
public int getItemCount() {
return data.size();
}
@Override
public int getItemViewType(int position) {
DataFeed current=data.get(position);
if (data.get(position) instanceof DataFeed) {
return USER;
} else if (data.get(position) instanceof String) {
return IMAGE;
}
return -1;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
RecyclerView.ViewHolder viewHolder;
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
switch (viewType) {
case USER:
View v1 = inflater.inflate(R.layout.layout_viewholder1, viewGroup, false);
viewHolder = new ViewHolder1(v1);
break;
case IMAGE:
View v2 = inflater.inflate(R.layout.layout_viewholder2, viewGroup, false);
viewHolder = new ViewHolder2(v2);
break;
default:
View v = inflater.inflate(R.layout.container_fish, viewGroup, false);
viewHolder = new MyHolder(v);
break;
}
return viewHolder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
switch (viewHolder.getItemViewType()) {
case USER:
ViewHolder1 vh1 = (ViewHolder1) viewHolder;
configureViewHolder1(vh1, position);
break;
case IMAGE:
ViewHolder2 vh2 = (ViewHolder2) viewHolder;
configureViewHolder2 (vh2, position, int);
break;
//default:
// RecyclerViewSimpleTextViewHolder vh = (RecyclerViewSimpleTextViewHolder) viewHolder;
// configureDefaultViewHolder(vh, position);
// break;
}
}
//private void configureDefaultViewHolder(RecyclerViewSimpleTextViewHolder vh, int position) {
// vh.getLabel().setText((CharSequence) items.get(position));
//}
private void configureViewHolder1(ViewHolder1 vh1, int position) {
DataFeed current = data.get(position);
if (current != null) {
vh1.getLabel1().setText("Name: " + current.fishName);
//vh1.getLabel2().setText("Hometown: " + current.hometown);
}
}
private void configureViewHolder2(ViewHolder2 vh2) {
vh2.getImageView().setImageResource(R.drawable.robbie);
}
class MyHolder extends RecyclerView.ViewHolder{
TextView textFishName;
ImageView ivFish;
TextView textSize;
TextView textType;
TextView textPrice;
// create constructor to get widget reference
public MyHolder(View itemView) {
super(itemView);
textFishName= (TextView) itemView.findViewById(R.id.textFishName);
ivFish= (ImageView) itemView.findViewById(R.id.banner);
}
}
}
答案 0 :(得分：0)
试试这个
SELECT t.* FROM @test t WHERE t.id IS NOT NULL;