- ackage cn.com.pcgroup.<a href="http://lib.csdn.net/base/15" class="replace_word" title="Android知识库" target="_blank" style="color:#df3434; font-weight:bold;">android</a>.browser.module.onlineproduct;
- import <a href="http://lib.csdn.net/base/17" class="replace_word" title="Java EE知识库" target="_blank" style="color:#df3434; font-weight:bold;">java</a>.io.IOException;
- import java.net.HttpURLConnection;
- import java.net.URL;
- import java.nio.ByteBuffer;
- import java.nio.channels.Channels;
- import java.nio.channels.ReadableByteChannel;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- import java.util.concurrent.Callable;
- import java.util.concurrent.ExecutorService;
- import java.util.concurrent.Executors;
- import java.util.concurrent.Future;
- import org.json.JSONArray;
- import org.json.JSONObject;
- import android.app.Activity;
- import android.os.Bundle;
- import android.util.Log;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.ListView;
- import android.widget.TextView;
- import cn.com.pcgroup.android.browser.R;
- public class Information extends Activity {
- private static final String baseUrl = "http://192.168.199.45/1.txt";
- private static final String TAG = Information.class.getSimpleName();
- private static LayoutInflater mInflater;
- private static String json;
- private Map<String, String> infoMap = new HashMap<String, String>();
- private static Map<Index, String> itemMap = new HashMap<Index, String>();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.online_product_information);
- ListView list = (ListView) findViewById(R.id.list);
- mInflater = getWindow().getLayoutInflater();
- try {
- json = downloadJSON().get();
- Log.v(TAG, json);
- JSONObject jsonObject = new JSONObject(json);
- handleJson(jsonObject, infoMap);
- Index i = new Index();
- i.setKey("image");
- i.setPos(1);
- String result = itemMap.get(i);
- Log.v(TAG, "result = " + result);
- Log.v(TAG, "productId = " + infoMap.get("productId"));
- Log.v(TAG, "itemCount = " + itemCount);
- InforAdapter adapter = new InforAdapter(itemCount);
- list.setAdapter(adapter);
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
- private void handleJson(JSONObject jsonObject, Map<String, String> infoMap) {
- if (jsonObject == null || infoMap == null)
- return;
- @SuppressWarnings("unchecked")
- Iterator<String> it = jsonObject.keys();
- while (it.hasNext()) {
- String key = it.next();
- JSONArray array = jsonObject.optJSONArray(key);
- // 假如只是JSONObject
- if (array == null)
- infoMap.put(key, jsonObject.optString(key));
- // 是JSONArray,则递归处理
- else {
- handleJsonArray(array, itemMap);
- }
- }
- }
- private static class Index {
- private int pos = 0;
- private String key = new String();
- public Index() {
- }
- public Index(int pos, String key) {
- this.pos = pos;
- this.key = key;
- }
- @Override
- public int hashCode() {
- final int prime = 31;
- int result = 1;
- result = prime * result + ((key == null) ? 0 : key.hashCode());
- result = prime * result + pos;
- return result;
- }
- @Override
- public boolean equals(Object obj) {
- if (obj == this)
- return true;
- if (obj instanceof Index)
- return ((Index) obj).pos == pos
- && (((Index) obj).key).equals(key);
- return false;
- }
- public int getPos() {
- return pos;
- }
- public void setPos(int pos) {
- this.pos = pos;
- }
- public String getKey() {
- return key;
- }
- public void setKey(String key) {
- this.key = key;
- }
- }
- private int itemCount = 0;
- private int handleJsonArray(JSONArray array, Map<Index, String> map) {
- if (array == null)
- return itemCount;
- int len = array.length();
- itemCount = len;
- for (int i = 0; i < len; i++) {
- JSONObject obj = (JSONObject) array.opt(i);
- @SuppressWarnings("unchecked")
- Iterator<String> it = obj.keys();
- while (it.hasNext()) {
- String key = it.next();
- JSONArray a = obj.optJSONArray(key);
- if (a != null)
- handleJsonArray(a, itemMap);
- else {
- Index index = new Index(i, key);
- itemMap.put(index, obj.optString(key));
- }
- }
- }
- return itemCount;
- }
- private static class InforAdapter extends BaseAdapter {
- private int count; // 有几条数据
- String[] sa = { "id", "title", "image", "channel" };
- public InforAdapter(int count) {
- this.count = count;
- }
- @Override
- public int getCount() {
- return count;
- }
- @Override
- public Object getItem(int position) {
- return position;
- }
- @Override
- public long getItemId(int position) {
- return position;
- }
- @Override
- public View getView(int position, View convertView, ViewGroup parent) {
- if (convertView == null) {
- convertView = mInflater.inflate(R.layout.information_layout,
- null);
- }
- TextView t = (TextView) convertView.findViewById(R.id.text);
- t.setTextSize(20);
- Index i = new Index(position, "title");
- t.setText(itemMap.get(i));
- return convertView;
- }
- }
- @SuppressWarnings({ "finally", "unused" })
- private String getStringFromServer(final String url){
- ReadableByteChannel channel = null;
- StringBuilder sb = null;
- try {
- URL u = new URL(url);
- HttpURLConnection conn = (HttpURLConnection) u.openConnection();
- channel = Channels.newChannel(conn.getInputStream());
- ByteBuffer buffer = ByteBuffer.allocate(1024);
- sb = new StringBuilder();
- while(channel.read(buffer) != -1){
- buffer.flip();
- while(buffer.hasRemaining())
- sb.append((char)buffer.get());
- buffer.clear();
- }
- } catch (Exception e) {
- throw new RuntimeException(e);
- }finally{
- try {
- channel.close();
- } catch (IOException e) {
- e.printStackTrace();
- }finally{
- return sb.toString();
- }
- }
- }
- private Future<String> downloadJSON(){
- ExecutorService exec = Executors.newCachedThreadPool();
- class DownLoadTask implements Callable<String>{
- @SuppressWarnings("static-access")
- @Override
- public String call() {
- json = OnlineApiService.getInstance(Information.this).getJSONString(baseUrl);
- return json;
- }
- }
- Future<String> future = exec.submit(new DownLoadTask());
- exec.shutdown();
- return future;
- }
- }
时间: 2024-10-14 07:53:48