Android打造属于自己的新闻平台（客户端+服务器）

SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET time_zone = "+00:00";

-- Database: `newsdemo`
-- 表的结构 `news`

CREATE TABLE IF NOT EXISTS `news` (
 `id` int(10) NOT NULL AUTO_INCREMENT,
 `title` text NOT NULL,
 `desc` text NOT NULL,
 `time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
 `content_url` text NOT NULL,
 `pic_url` text NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;

--
-- 转存表中的数据 `news`
--

INSERT INTO `news` (`id`, `title`, `desc`, `time`, `content_url`, `pic_url`) VALUES
(1, 'Oracle解锁封锁的账号', '我们在安装Oracle的时候最后一步有一个管理账户的，里边可以解锁所所需的账户', '2015-03-15 11:50:03', 'http://blog.csdn.net/xlgen157387/article/details/41595709', 'http://img.blog.csdn.net/20141129144613046?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQveGxnZW4xNTczODc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center'),
(2, 'Android程序之全国天气预报查询(聚合数据开发)', '项目演示效果如下： 项目源代码下载地址： 访问密码 2eac二、使用 聚合数据SDK：', '2015-03-15 11:50:13', 'http://blog.csdn.net/xlgen157387/article/details/44246119', 'http://img.blog.csdn.net/20150314095028546');

<?php

  $con = mysql_connect("localhost", "root", "your password!");
  //设置字符集为utf8
  mysql_query("SET NAMES 'utf8'");
  mysql_query("SET CHARACTER SET utf8");
  mysql_query("SET CHARACTER_SET_RESULT=utf8");

  if (!$con){
    die(mysql_error());
  }

  mysql_select_db("newsdemo", $con);
?>

<?php

/*
 * 获得JSON数据
 * 返回值：title desc time content_url pic_url
 */

 require 'mysql_connect.php';

 $n = 0;
 $result = mysql_query("select * from news");
 while ($row = mysql_fetch_array($result)){
  $arr[$n++] = array("title" => $row['title'],
            "desc" => $row['desc'],
            "time" => $row['time'],
            "content_url" => $row['content_url'],
            "pic_url" => $row['pic_url']
          );
 }

 //数组转换为JSON字符串
 echo json_encode($arr);

?>

package com.xuliugen.news;

import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.xuliugen.news.adapter.NewsAdapter;
import com.xuliugen.news.model.News;
import com.xuliugen.news.utils.HttpUtils;

public class MainActivity extends Activity implements OnItemClickListener{

  private ListView lvNews;
  private NewsAdapter adapter;
  private List<News> newsList;

  //此处需要修改为自己的服务器地址：也就是具体的服务器地址:这里不要写你的localhost或者127.0.0.1因为这是要在手机上运行的！
  public static final String GET_NEWS_URL = "http://172.23.252.89:8080/NewsDemo/getNewsJSON.php";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    lvNews = (ListView) findViewById(R.id.lvNews); //一条一条的消息展示消息
    newsList = new ArrayList<News>(); //初始化
    adapter = new NewsAdapter(this, newsList); //也是初始化，会在后期执行getNewsJSON()方法之后更新

    lvNews.setAdapter(adapter); //设置构造器
    lvNews.setOnItemClickListener(this);

    //这里执行了网络的的请求操作
    HttpUtils.getNewsJSON(GET_NEWS_URL, getNewsHandler); //传入的一个handler对象
  }

  // 这里是访问网络数据的时候，返回的handler
  private Handler getNewsHandler = new Handler(){

      /**
       * 这个方法是Handler自带的方法，用于接受返回的数据
       */
      public void handleMessage(android.os.Message msg) {
        String jsonData = (String) msg.obj;
        System.out.println(jsonData);
        try {

          //下边是解析json
          JSONArray jsonArray = new JSONArray(jsonData);
          for (int i=0;i<jsonArray.length();i++){
            JSONObject object = jsonArray.getJSONObject(i);
            String title = object.getString("title");
            String desc = object.getString("desc");
            String time = object.getString("time");
            String content_url = object.getString("content_url");
            String pic_url = object.getString("pic_url");
            newsList.add(new News(title, desc, time, content_url, pic_url));
          }
          adapter.notifyDataSetChanged();//通知适配器数据发生变化
        } catch (Exception e) {
          e.printStackTrace();
        }
      };
    };

  /**
   * 每一个条目的点击事件
   */
  @Override
  public void onItemClick(AdapterView<?> adapter, View view, int position, long arg3) {

    //获取被点击的对象
    News news = newsList.get(position); 
    Intent intent = new Intent(this, BrowseNewsActivity.class);
    intent.putExtra("content_url", news.getContent_url()); //根据被点击的对象，获取其url
    startActivity(intent);
  }

}

package com.xuliugen.news.utils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

/**
 * 访问网络的工具类
 * 
 * @author xuliugen
 * 
 */
public class HttpUtils {

  public static void getNewsJSON(final String url, final Handler handler) {

    //要访问网络，开启一个线程
    new Thread(new Runnable() {
      @Override
      public void run() {
        HttpURLConnection conn;
        InputStream inputStream;
        try {
          conn = (HttpURLConnection) new URL(url).openConnection();
          conn.setRequestMethod("GET");
          inputStream = conn.getInputStream();
          BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
          String line = "";
          StringBuilder result = new StringBuilder(); //StringBuilder初始化不可以null
          while ((line = reader.readLine()) != null) {
            result.append(line);
          }

          //使用handler的话要使用Message
          Message msg = new Message();
          msg.obj = result.toString();

          // 通知主线程handler
          handler.sendMessage(msg);
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }).start();
  }

  /**
   * 设置图片的信息
   * 
   * 在适配器里边调用
   * 
   * @param ivPic 需要设置的view组件
   * @param pic_url 图片的地址
   */
  public static void setPicBitmap(final ImageView ivPic, final String pic_url) {
    new Thread(new Runnable() {
      @Override
      public void run() {
        try {
          HttpURLConnection conn = (HttpURLConnection) new URL(pic_url).openConnection();
          conn.connect();
          InputStream is = conn.getInputStream();
          Bitmap bitmap = BitmapFactory.decodeStream(is);
          ivPic.setImageBitmap(bitmap);
          is.close();
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }).start();
  }

}

package com.xuliugen.news.model;

/**
 * 与json数据相对应的bean
 * 
 * @author xuliugen
 * 
 */
public class News {

  private String title;
  private String desc;
  private String time;
  private String content_url;
  private String pic_url;

  /**
   * 全参的构造函数
   * 
   * @param title
   * @param desc
   * @param time
   * @param content_url
   * @param pic_url
   */
  public News(String title, String desc, String time, String content_url,
      String pic_url) {
    setTitle(title);
    setDesc(desc);
    setTime(time);
    setContent_url(content_url);
    setPic_url(pic_url);
  }

  public String getTitle() {
    return title;
  }

  public void setTitle(String title) {
    this.title = title;
  }

  public String getDesc() {
    return desc;
  }

  public void setDesc(String desc) {
    this.desc = desc;
  }

  public String getTime() {
    return time;
  }

  public void setTime(String time) {
    this.time = time;
  }

  public String getContent_url() {
    return content_url;
  }

  public void setContent_url(String content_url) {
    this.content_url = content_url;
  }

  public String getPic_url() {
    return pic_url;
  }

  public void setPic_url(String pic_url) {
    this.pic_url = pic_url;
  }

}

package com.xuliugen.news.adapter;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.xuliugen.news.R;
import com.xuliugen.news.model.News;
import com.xuliugen.news.utils.HttpUtils;

/**
 * 用于显示在界面上的item
 * 
 * @author piaodangdehun
 * 
 */
public class NewsAdapter extends BaseAdapter {

  private Context context;
  private List<News> newsList;

  /**
   * 构造方法的时候传入newsList
   * 
   * @param context
   * @param newsList 需要填入的news信息
   */
  public NewsAdapter(Context context, List<News> newsList) {
    this.context = context;
    this.newsList = newsList;
  }

  @Override
  public int getCount() {
    return newsList.size();
  }

  @Override
  public News getItem(int position) {
    return newsList.get(position);
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  /**
   * 为news-item中的布局赋值
   */
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    if (convertView == null) { //如果为空则重新创建
      convertView = LayoutInflater.from(context).inflate(R.layout.news_item, null);
    }
    // 获得news-item中的控件
    TextView tvTitle = (TextView) convertView.findViewById(R.id.tvTitle);
    TextView tvDesc = (TextView) convertView.findViewById(R.id.tvDesc);
    TextView tvTime = (TextView) convertView.findViewById(R.id.tvTime);
    ImageView ivPic = (ImageView) convertView.findViewById(R.id.ivPic);

    News news = newsList.get(position);
    tvTitle.setText(news.getTitle());
    tvDesc.setText(news.getDesc());
    tvTime.setText(news.getTime());

    String pic_url = news.getPic_url();
    HttpUtils.setPicBitmap(ivPic, pic_url);

    return convertView;
  }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.xuliugen.news"
  android:versionCode="1"
  android:versionName="1.0" >

  <uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />
  <uses-permission android:name="android.permission.INTERNET"/>

  <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
      android:name="com.xuliugen.news.MainActivity"
      android:label="@string/app_name" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <activity android:name="BrowseNewsActivity"></activity>
  </application>

</manifest>