com.github.volley_examples.Act_JsonRequest.java Source code

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Here is the source code for com.github.volley_examples.Act_JsonRequest.java

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/**
 * Copyright 2013 Ognyan Bankov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.volley_examples;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

import org.json.JSONException;
import org.json.JSONObject;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.Request.Method;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import com.example.volley_examples.R;
import com.github.volley_examples.app.MyVolley;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

/**
 * Demonstrates how to execute <code>JsonObjectRequest</code>
 * @author Ognyan Bankov
 *
 */
public class Act_JsonRequest extends Activity {
    private static final String TAG = "com.lms.volleydemo.JsonActivity";

    private RequestQueue mQueue;

    private static final String WEATHER_LINK = "http://www.weather.com.cn/data/sk/101280101.html";

    private ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();

    private ListView lvWeather;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.act__json_request);

        lvWeather = (ListView) findViewById(R.id.lvWeather);

        mQueue = Volley.newRequestQueue(this);
        //getWeatherInfo();
        //{"weatherinfo":{"city":"","cityid":"101280101","temp":"12","WD":"","WS":"2","SD":"95%",
        //"WSE":"2","time":"21:05","isRadar":"1","Radar":"JC_RADAR_AZ9200_JB"}}

        final Handler handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                // super.handleMessage(msg);
                init();
            }
        };

        Runnable update_thread = new Runnable() {
            public void run() {
                getWeatherInfo();
                handler.sendEmptyMessageDelayed(99, 2000);

            }
        };

        handler.postDelayed(update_thread, 300);

    }

    private void init() {
        SimpleAdapter simpleAdapter = new SimpleAdapter(this, list, android.R.layout.simple_list_item_2,
                new String[] { "title", "content" }, new int[] { android.R.id.text1, android.R.id.text2 });

        lvWeather.setAdapter(simpleAdapter);

    }

    public void getWeatherInfo() {
        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(WEATHER_LINK, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject arg0) {
                        list.clear();
                        Iterator<String> it = arg0.keys();
                        while (it.hasNext()) {
                            String key = it.next();
                            JSONObject obj = null;
                            try {
                                obj = arg0.getJSONObject(key);
                            } catch (JSONException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                            if (obj != null) {
                                Iterator<String> objIt = obj.keys();
                                while (objIt.hasNext()) {
                                    String objKey = objIt.next();
                                    String objValue;
                                    try {
                                        objValue = obj.getString(objKey);
                                        HashMap<String, String> map = new HashMap<String, String>();
                                        map.put("title", objKey);
                                        map.put("content", objValue);
                                        Log.v(TAG, "title = " + objKey + " | content = " + objValue);
                                        list.add(map);
                                    } catch (JSONException e) {
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();
                                    }
                                }
                            }
                        }
                        Log.v(TAG, "list.size = " + list.size());
                    }
                }, new Response.ErrorListener() {

                    @Override
                    public void onErrorResponse(VolleyError arg0) {
                        // TODO Auto-generated method stub

                    }
                });
        mQueue.add(jsonObjectRequest);

    }
}