基于Android的小巫新闻客户端开发---显示新闻详细内容业务逻辑实现

http://blog.csdn.net/wwj_748/article/details/8619417

 

 

2013年2月27日，继续小巫新闻客户端的开发。

上一篇忘记谈及一个比较重要的内容，有些网友留言给小巫问：Json数据的明细是怎样的？，在这里小巫先声明一点，小巫对Json数据的格式也是刚接触，这是稍微知道其的结构组成，关于是否尤其内容并不是很清楚。但小巫对与怎么进行JSON格式的解析已经比较清晰了。下面就接这篇博客来介绍一下，新闻详细内容的JSON数据是怎样的，通过浏览器得到的数据到底是怎样的。

 

如果得到小巫所共享的资源的话，服务端的项目是一个叫web的JavaEE项目，如果有看过里面的具体实现的话，读者可能就会明白，服务端是如何与数据库进行交互的了。那好，部署好项目到Tomcat中，在浏览器就可以得到相应的JSON数据源。

获取新闻详细内容的Servlet代码如下：注：（这是服务端的代码），关于解析JSON数据的解析，在介绍客户端业务逻辑实现的时候会说明。

package com.szy.web.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

import sun.reflect.generics.reflectiveObjects.NotImplementedException;

import com.szy.web.dao.CommentDAO;
import com.szy.web.dao.NewsDAO;
import com.szy.web.model.News;
import com.szy.web.util.TextUtility;

/**
 *@author coolszy
 *@date Feb 19, 2012
 *@blog http://blog.92coding.com
 *http://localhost:8080/web/getNews?nid=1
 */
public class GetNewsServlet extends HttpServlet
{
    private static final long serialVersionUID = -7715894432269979527L;

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {

        response.setContentType("text/html;charset=UTF-8");
        String nidStr= request.getParameter("nid");
        int nid = 0;
        nid = TextUtility.String2Int(nidStr);
        JSONObject jObject = new JSONObject();
        try
        {
            CommentDAO commentDAO = new CommentDAO();
            long commentCount = commentDAO.getSpecifyNewsCommentsCount(nid);
            NewsDAO newsDAO = new NewsDAO();
            News news = newsDAO.getNews(nid);
            JSONObject jObject2 = new JSONObject();
            if (!TextUtility.isNull(news.getTitle()))
            {
                HashMap<String, Object> hashMap = new HashMap<String, Object>();


                /***************后期增加代码，主要用于测试TextView显示图片功能********************/
                String newsbody = news.getBody();
                ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String,Object>>();
                HashMap<String, Object> hashMap1 = new HashMap<String, Object>();
                hashMap1.put("index", 0);
                hashMap1.put("type", "image");
                hashMap1.put("value", "http://www.eportfolio.wtuc.edu.tw/blog/attach/35/16035/95/bf_22696_7751198_66497_4.jpg");

                HashMap<String, Object> hashMap2 = new HashMap<String, Object>();
                hashMap2.put("index", 1);
                hashMap2.put("type", "text");
                hashMap2.put("value", newsbody);

                list.add(hashMap1);
                list.add(hashMap2);
            /********************************************************/

                hashMap.put("nid", news.getNid());
                hashMap.put("title", news.getTitle());
                //hashMap.put("body", news.getBody());
                hashMap.put("body", list);
                hashMap.put("source", news.getSource());
                hashMap.put("replycount", commentCount);
                hashMap.put("ptime", news.getPtime());
                hashMap.put("imgsrc", news.getImgSrc());
                jObject2.put("news", hashMap);
            }
            jObject.put("ret", 0);
            jObject.put("msg", "ok");
            jObject.put("data", jObject2);
        } catch (Exception e)
        {
            e.printStackTrace();
            try
            {
                jObject.put("ret", 1);
                jObject.put("msg", e.getMessage());
                jObject.put("data", "");
            } catch (JSONException ex)
            {
                ex.printStackTrace();
            }
        }
        PrintWriter out = response.getWriter();
        out.println(jObject);
        out.flush();
        out.close();
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        throw new NotImplementedException();
    }
}

package com.szy.web.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

import sun.reflect.generics.reflectiveObjects.NotImplementedException;

import com.szy.web.dao.CommentDAO;
import com.szy.web.dao.NewsDAO;
import com.szy.web.model.News;
import com.szy.web.util.TextUtility;

/**
 *@author coolszy
 *@date Feb 19, 2012
 *@blog http://blog.92coding.com
 *http://localhost:8080/web/getNews?nid=1
 */
public class GetNewsServlet extends HttpServlet
{
	private static final long serialVersionUID = -7715894432269979527L;

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{

		response.setContentType("text/html;charset=UTF-8");
		String nidStr= request.getParameter("nid");
		int nid = 0;
		nid = TextUtility.String2Int(nidStr);
		JSONObject jObject = new JSONObject();
		try
		{
			CommentDAO commentDAO = new CommentDAO();
			long commentCount = commentDAO.getSpecifyNewsCommentsCount(nid);
			NewsDAO newsDAO = new NewsDAO();
			News news = newsDAO.getNews(nid);
			JSONObject jObject2 = new JSONObject();
			if (!TextUtility.isNull(news.getTitle()))
			{
				HashMap<String, Object> hashMap = new HashMap<String, Object>();
				
				
				/***************后期增加代码，主要用于测试TextView显示图片功能********************/
				String newsbody = news.getBody();
				ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String,Object>>();
				HashMap<String, Object> hashMap1 = new HashMap<String, Object>();
				hashMap1.put("index", 0);
				hashMap1.put("type", "image");
				hashMap1.put("value", "http://www.eportfolio.wtuc.edu.tw/blog/attach/35/16035/95/bf_22696_7751198_66497_4.jpg");
				
				HashMap<String, Object> hashMap2 = new HashMap<String, Object>();
				hashMap2.put("index", 1);
				hashMap2.put("type", "text");
				hashMap2.put("value", newsbody);
				
				list.add(hashMap1);
				list.add(hashMap2);
			/********************************************************/
				
				hashMap.put("nid", news.getNid());
				hashMap.put("title", news.getTitle());
				//hashMap.put("body", news.getBody());
				hashMap.put("body", list);
				hashMap.put("source", news.getSource());
				hashMap.put("replycount", commentCount);
				hashMap.put("ptime", news.getPtime());
				hashMap.put("imgsrc", news.getImgSrc());
				jObject2.put("news", hashMap);
			}
			jObject.put("ret", 0);
			jObject.put("msg", "ok");
			jObject.put("data", jObject2);
		} catch (Exception e)
		{
			e.printStackTrace();
			try
			{
				jObject.put("ret", 1);
				jObject.put("msg", e.getMessage());
				jObject.put("data", "");
			} catch (JSONException ex)
			{
				ex.printStackTrace();
			}
		}
		PrintWriter out = response.getWriter();
		out.println(jObject);
		out.flush();
		out.close();
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		throw new NotImplementedException();
	}
}

 

 

这就是服务端从数据库获取新闻详细内容的Servlet,当然这只是Servlet的代码，查询数据库的代码需要到web项目查看。

在浏览器敲入如下URL：http://localhost:8080/web/getNews?nid=2

就会得到数据nid为2的新闻内容如下：

{"ret":0,"data":{"news":{"body":[{"index":0,"value":"http://www.eportfolio.wtuc.edu.tw/blog/attach/35/16035/95/bf_22696_7751198_66497_4.jpg","type":"image"},{"index":1,"value":"

新华网十八大快讯：党的十八届一中全会选举习近平、李克强、张德江、俞正声、刘云山、王岐山、张高丽为中央政治局常委。<\/p>","type":"text"}],"title":"党的十八届一中全会选举习近平、李克强、张德江、俞正声、刘云山、王岐山、张高丽为中央政治局常委 ","source":"来源： 新华网","nid":2,"replycount":1,"ptime":"2012年11月15日 11:45:36"}},"msg":"ok"}

 

这样看是比较乱的，需要将这些数据进行一下格式化，看起来比较舒服。

{
  "ret": 0,
  "data": {
    "news": {
      "body": [
        {
          "index": 0,
          "value": "http://www.eportfolio.wtuc.edu.tw/blog/attach/35/16035/95/bf_22696_7751198_66497_4.jpg",
          "type": "image"
        },
        {
          "index": 1,
          "value": " <p>新华网十八大快讯：党的十八届一中全会选举习近平、李克强、张德江、俞正声、刘云山、王岐山、张高丽为中央政治局常委。</p>",
          "type": "text"
        }
      ],
      "title": "党的十八届一中全会选举习近平、李克强、张德江、俞正声、刘云山、王岐山、张高丽为中央政治局常委 ",
      "source": "来源： 新华网",
      "nid": 2,
      "replycount": 1,
      "ptime": "2012年11月15日 11:45:36"
    }
  },
  "msg": "ok"
}

{
  "ret": 0, 
  "data": {
    "news": {
      "body": [
        {
          "index": 0, 
          "value": "http://www.eportfolio.wtuc.edu.tw/blog/attach/35/16035/95/bf_22696_7751198_66497_4.jpg", 
          "type": "image"
        }, 
        {
          "index": 1, 
          "value": " <p>新华网十八大快讯：党的十八届一中全会选举习近平、李克强、张德江、俞正声、刘云山、王岐山、张高丽为中央政治局常委。</p>", 
          "type": "text"
        }
      ], 
      "title": "党的十八届一中全会选举习近平、李克强、张德江、俞正声、刘云山、王岐山、张高丽为中央政治局常委 ", 
      "source": "来源： 新华网", 
      "nid": 2, 
      "replycount": 1, 
      "ptime": "2012年11月15日 11:45:36"
    }
  }, 
  "msg": "ok"
}

 

那好，关于JSON数据的明细，就说到这里。从格式化的JSON数据是可以很清楚得到新闻的组成结构的，接下来就是要在客户端解析这些数据，并把它们显示到手机界面上，这才是我们花那么大功夫去解析JSON数据的原因。

 

贴上代码之前，当然需要看一下最终需要实现的效果图：

    

 

关于这个界面我就不做过多的说明了，最重要的是具体实现。

package com.xiaowu.news;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;

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

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewFlipper;

import com.xiaowu.news.service.SyncHttp;
import com.xiaowu.news.thread.PostCommentsThread;

public class NewsDetailActivity extends Activity {

    private final int FINISH = 0;               //代表线程的状态的结束
    private LayoutInflater mNewsbodyLayoutInflater;
    private ViewFlipper mNewsBodyFlipper;       //屏幕切换控件
    private ArrayList<HashMap<String, Object>> mNewsData;
    private float mStartX;                      //手指按下的开始位置
    private int mPosition = 0;                  //点击新闻位置
    private int mCursor = 0;                    //用来标记新闻点击的位置
    private int mNid;                           //新闻编号
    private Button mNewsDetailTitleBarComm;     //显示评论条数的按钮
    private ConstomTextView mNewsBodyDetail;    //新闻详细内容
    private LinearLayout mNewsReplyEditLayout;  //新闻回复的布局
    private LinearLayout mNewsReplyImgLayout;   //新闻图片回复的布局
    private EditText mNewsReplyEditText;        //新闻回复的文本框
    private ImageButton mShareNewsButton;       //分享新闻的按钮
    private ImageButton mFavoritesButton;       //收藏新闻的按钮
    private boolean keyboardShow;               //键盘是否显示
    private Handler mHandler = new Handler() {

        @SuppressWarnings("unchecked")
        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            switch (msg.arg1) {
            case FINISH:
                //把获取到的新闻显示到界面上
                ArrayList<HashMap<String, Object>> bodyList = (ArrayList<HashMap<String, Object>>) msg.obj;
                mNewsBodyDetail.setText(bodyList);
                break;
            }
        }
    };

    @SuppressWarnings("unchecked")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.newsdetails_layout);

        mNewsReplyEditLayout = (LinearLayout) findViewById(R.id.news_reply_edit_layout);
        mNewsReplyImgLayout = (LinearLayout) findViewById(R.id.news_reply_img_layout);

        Button newsDetailPrev = (Button) findViewById(R.id.newsdetail_titlebar_previous);
        Button newsDetailNext = (Button) findViewById(R.id.newsdetail_titlebar_next);
        mNewsDetailTitleBarComm = (Button) findViewById(R.id.newsdetail_titlebar_comments);
        mNewsReplyEditText = (EditText) findViewById(R.id.news_reply_edittext);
        mShareNewsButton = (ImageButton) findViewById(R.id.news_share_btn);
        mFavoritesButton = (ImageButton) findViewById(R.id.news_favorites_btn);


        NewsDetailOnClickListener newsDetailOnClickListener = new NewsDetailOnClickListener();

        newsDetailPrev.setOnClickListener(newsDetailOnClickListener);
        newsDetailNext.setOnClickListener(newsDetailOnClickListener);
        mNewsDetailTitleBarComm.setOnClickListener(newsDetailOnClickListener);
        mShareNewsButton.setOnClickListener(newsDetailOnClickListener);
        mFavoritesButton.setOnClickListener(newsDetailOnClickListener);

        Button newsReplyPost = (Button) findViewById(R.id.news_reply_post);
        newsReplyPost.setOnClickListener(newsDetailOnClickListener);
        ImageButton newsReplyImgBtn = (ImageButton) findViewById(R.id.news_reply_img_btn);
        newsReplyImgBtn.setOnClickListener(newsDetailOnClickListener);


        //获取传送的数据
        Intent intent = getIntent();
        Bundle bundle = intent.getExtras();
        String categoryName = bundle.getString("categoryTitle");
        TextView titleBarTitle = (TextView) findViewById(R.id.newsdetail_titlebar_title);
        //设置标题栏的标题
        titleBarTitle.setText(categoryName);
        //获取新闻集合
        Serializable serializable = bundle.getSerializable("newsData");
        mNewsData = (ArrayList<HashMap<String, Object>>) serializable;

        //获取点击位置
        mCursor = mPosition = bundle.getInt("position");

        mNewsBodyFlipper = (ViewFlipper) findViewById(R.id.news_body_flipper);
        // 获取LayoutInflater对象
        mNewsbodyLayoutInflater = getLayoutInflater();

        inflateView(0);
        //启动线程
        new UpdateNewsThread().start();
    }

    /**
     * 显示上一条新闻
     */
    private void showPrevious() {
        if(mPosition > 0) {
            mPosition--;
            //记录当前新闻编号
            HashMap<String, Object> hashMap = mNewsData.get(mPosition);
            mNid = (Integer) hashMap.get("nid");
            if(mCursor > mPosition){
                mCursor = mPosition;
                inflateView(0);
                mNewsBodyFlipper.showNext();
            }
            mNewsBodyFlipper.setInAnimation(this, R.anim.push_right_in);    //设置下一页进来时的动画
            mNewsBodyFlipper.setOutAnimation(this, R.anim.push_right_out);  //设置当前页出去的动画
            mNewsBodyFlipper.showPrevious();
        }
        else {
            Toast.makeText(NewsDetailActivity.this, "没有上一篇新闻", Toast.LENGTH_SHORT).show();
        }
    }

    /**
     * 显示下一条新闻
     */
    private void showNext() {
        if(mPosition < mNewsData.size() - 1){
            // 设置下一屏动画
            mNewsBodyFlipper.setInAnimation(this, R.anim.push_left_in);
            mNewsBodyFlipper.setOutAnimation(this, R.anim.push_left_out);
            mPosition++;
            //记录当前新闻编号
            HashMap<String, Object> hashMap = mNewsData.get(mPosition);
            mNid = (Integer) hashMap.get("nid");
            if(mPosition >= mNewsBodyFlipper.getChildCount()){
                inflateView(mNewsBodyFlipper.getChildCount());
            }
            mNewsBodyFlipper.showNext();
        } else {
            Toast.makeText(NewsDetailActivity.this, "没有下篇新闻", Toast.LENGTH_SHORT).show();
        }
    }

    private void inflateView(int index) {
        //获取点击新闻信息
        HashMap<String, Object> hashMap = mNewsData.get(mPosition);
        mNid = (Integer) hashMap.get("nid");

        View mNewsBodyView = mNewsbodyLayoutInflater.inflate(
                R.layout.newsbody_layout, null);
        mNewsDetailTitleBarComm.setText(hashMap.get("newslist_item_comments").toString() + "跟帖");
        //新闻标题
        TextView newsTitle = (TextView) mNewsBodyView
                .findViewById(R.id.news_body_title);
        newsTitle.setText(hashMap.get("newslist_item_title").toString());
        //新闻的出处和发布时间
        TextView newsPtimeAndSource = (TextView) mNewsBodyView
                .findViewById(R.id.news_body_ptime_source);
        newsPtimeAndSource.setText(hashMap.get("newslist_item_source").toString()
                + "     " + hashMap.get("newslist_item_ptime").toString());
        mNewsBodyDetail = (ConstomTextView) mNewsBodyView
                .findViewById(R.id.news_body_details);
        mNewsBodyDetail.setText(getNewsBody());
        mNewsBodyFlipper.addView(mNewsBodyView, index);
        mNewsBodyDetail.setOnTouchListener(new NewsBodyOntouchListener());
    }

    // 定义内部类--用于处理标题栏的按钮的触发事件
    private class NewsDetailOnClickListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            InputMethodManager m = (InputMethodManager) mNewsReplyEditText.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            // TODO Auto-generated method stub
            switch (v.getId()) {
            //上一篇
            case R.id.newsdetail_titlebar_previous:
                showPrevious();
                break;
            //下一篇
            case R.id.newsdetail_titlebar_next:
                showNext();
                break;
            //跟帖
            case R.id.newsdetail_titlebar_comments:
                Intent intent = new Intent(NewsDetailActivity.this,
                        CommentsActivity.class);
                intent.putExtra("nid", mNid);
                startActivity(intent);
                break;
            //“写跟帖”图片
            case R.id.news_reply_img_btn:
                mNewsReplyEditLayout.setVisibility(View.VISIBLE);
                mNewsReplyImgLayout.setVisibility(View.GONE);
                mNewsReplyEditText.requestFocus();
                //显示输入法
                m.toggleSoftInput(0, InputMethodManager.SHOW_IMPLICIT);
                keyboardShow = true;
                break;
            //分享按钮
            case R.id.news_share_btn:
                Intent shareIntent = new Intent(Intent.ACTION_SEND);
                //纯文本
                shareIntent.setType("text/plain");
                shareIntent.putExtra(Intent.EXTRA_SUBJECT, "分享");
                shareIntent.putExtra(Intent.EXTRA_TEXT, "我想将这个分享给你...."+ getTitle());
                startActivity(Intent.createChooser(shareIntent, getTitle()));
                break;
            //收藏按钮
            case R.id.news_favorites_btn:
                Toast.makeText(NewsDetailActivity.this, "收藏成功", Toast.LENGTH_SHORT).show();
                break;
            //发表按钮
            case R.id.news_reply_post:
                //隐藏输入法
                m.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
                String str = mNewsReplyEditText.getText().toString();
                if(str.equals("")){
                    Toast.makeText(NewsDetailActivity.this, "不能为空",
                            Toast.LENGTH_SHORT).show();
                }
                else {
                    mNewsReplyEditLayout.post(new PostCommentsThread(mNid, "广州市",
                            str + "",
                            new NewsDetailActivity()));
                    mNewsReplyEditLayout.setVisibility(View.GONE);
                    mNewsReplyImgLayout.setVisibility(View.VISIBLE);
                }
                break;
            }
        }
    }

    private class NewsBodyOntouchListener implements OnTouchListener {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            switch (event.getAction()) {
                //手指按下
            case MotionEvent.ACTION_DOWN:
                if(keyboardShow){
                    mNewsReplyEditLayout.setVisibility(View.GONE);
                    mNewsReplyImgLayout.setVisibility(View.VISIBLE);
                    //隐藏输入法
                    InputMethodManager m = (InputMethodManager) mNewsReplyEditText.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                    m.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
                    keyboardShow = false;
                }
                //得到按下的横坐标的位置
                mStartX = event.getX();
                break;
            case MotionEvent.ACTION_UP:
                // 往左滑动
                if (event.getX() < mStartX) {
                    showNext();
                }
                // 往右滑动
                else if (event.getX() > mStartX) {
                    showPrevious();
                }
                break;
            }
            return true;
        }
    }

    /**
     * 定义一个线程类，用来更新获取到新闻的信息
     * @author Administrator
     *
     */
    private class UpdateNewsThread extends Thread {
        @Override
        public void run() {
            // TODO Auto-generated method stub
            ArrayList<HashMap<String, Object>> newsStr = getNewsBody();
            Message msg = mHandler.obtainMessage(); //获取msg
            msg.arg1 = FINISH;
            msg.obj = newsStr;
            mHandler.sendMessage(msg);  //给Handler发送信息
        }
    }


    /**
     * 获取新闻详细信息
     * @return
     */
    private ArrayList<HashMap<String, Object>> getNewsBody(){
        //String retStr = "网络连接失败,请稍后再试";
        ArrayList<HashMap<String, Object>> bodylist = new ArrayList<HashMap<String,Object>>();

        SyncHttp syncHttp = new SyncHttp();
        //模拟器:url = "http://10.0.2.2:8080/web/getNews";
        //本机:http://127.0.0.1:8080
        //wifi局域网:http://192.168.220.1:8080
        String url = "http://10.0.2.2:8080/web/getNews";
        String params = "nid=" + mNid;
        try {
            String retString = syncHttp.httpGet(url, params);
            JSONObject  jsonObject = new JSONObject(retString);
            //获取返回码，0表示成功
            int retCode = jsonObject.getInt("ret");
            if(retCode == 0) {
                JSONObject dataObject = jsonObject.getJSONObject("data");
                JSONObject newsObject = dataObject.getJSONObject("news");
                //retStr = newsObject.getString("body");
                JSONArray bodyArray = newsObject.getJSONArray("body");
                for(int i = 0; i < bodyArray.length(); i++) {
                    JSONObject object = (JSONObject) bodyArray.opt(i);
                    HashMap<String, Object> hashMap = new HashMap<String, Object>();
                    hashMap.put("index", object.get("index"));
                    hashMap.put("type", object.get("type"));
                    hashMap.put("value", object.get("value"));
                    bodylist.add(hashMap);
                }
            }
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return bodylist;
    }


    @Override
    public boolean onCreatePanelMenu(int featureId, Menu menu) {
        // TODO Auto-generated method stub
        menu.add(0, 0, 0, "分享");
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        switch(item.getItemId()) {
        case 0:
            Intent shareIntent = new Intent(Intent.ACTION_SEND);
            //纯文本
            shareIntent.setType("text/plain");
            shareIntent.putExtra(Intent.EXTRA_SUBJECT, "分享");
            shareIntent.putExtra(Intent.EXTRA_TEXT, "我想把这个分享给你:" + getTitle());
            shareIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(Intent.createChooser(shareIntent, getTitle()));
            System.out.println(getTitle());
            break;

        }
        return super.onOptionsItemSelected(item);
    }
}

package com.xiaowu.news;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;

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

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewFlipper;

import com.xiaowu.news.service.SyncHttp;
import com.xiaowu.news.thread.PostCommentsThread;

public class NewsDetailActivity extends Activity {

	private final int FINISH = 0;				//代表线程的状态的结束
	private LayoutInflater mNewsbodyLayoutInflater;
	private ViewFlipper mNewsBodyFlipper;		//屏幕切换控件
	private ArrayList<HashMap<String, Object>> mNewsData;
	private float mStartX;						//手指按下的开始位置
	private int mPosition = 0;					//点击新闻位置		
	private int mCursor = 0;					//用来标记新闻点击的位置
	private int mNid;							//新闻编号
	private Button mNewsDetailTitleBarComm;		//显示评论条数的按钮
	private ConstomTextView mNewsBodyDetail;	//新闻详细内容
	private LinearLayout mNewsReplyEditLayout;	//新闻回复的布局
	private LinearLayout mNewsReplyImgLayout;	//新闻图片回复的布局
	private EditText mNewsReplyEditText;		//新闻回复的文本框
	private ImageButton mShareNewsButton;		//分享新闻的按钮
	private ImageButton mFavoritesButton;		//收藏新闻的按钮
	private boolean keyboardShow;				//键盘是否显示
	private Handler mHandler = new Handler() {

		@SuppressWarnings("unchecked")
		@Override
		public void handleMessage(Message msg) {
			// TODO Auto-generated method stub
			switch (msg.arg1) {
			case FINISH:
				//把获取到的新闻显示到界面上
				ArrayList<HashMap<String, Object>> bodyList = (ArrayList<HashMap<String, Object>>) msg.obj;
				mNewsBodyDetail.setText(bodyList);
				break;
			}
		}
	};

	@SuppressWarnings("unchecked")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.newsdetails_layout);

		mNewsReplyEditLayout = (LinearLayout) findViewById(R.id.news_reply_edit_layout);
		mNewsReplyImgLayout = (LinearLayout) findViewById(R.id.news_reply_img_layout);
		
		Button newsDetailPrev = (Button) findViewById(R.id.newsdetail_titlebar_previous);
		Button newsDetailNext = (Button) findViewById(R.id.newsdetail_titlebar_next);
		mNewsDetailTitleBarComm = (Button) findViewById(R.id.newsdetail_titlebar_comments);
		mNewsReplyEditText = (EditText) findViewById(R.id.news_reply_edittext);
		mShareNewsButton = (ImageButton) findViewById(R.id.news_share_btn);
		mFavoritesButton = (ImageButton) findViewById(R.id.news_favorites_btn);
		
		
		NewsDetailOnClickListener newsDetailOnClickListener = new NewsDetailOnClickListener();
		
		newsDetailPrev.setOnClickListener(newsDetailOnClickListener);
		newsDetailNext.setOnClickListener(newsDetailOnClickListener);
		mNewsDetailTitleBarComm.setOnClickListener(newsDetailOnClickListener);
		mShareNewsButton.setOnClickListener(newsDetailOnClickListener);
		mFavoritesButton.setOnClickListener(newsDetailOnClickListener);
		
		Button newsReplyPost = (Button) findViewById(R.id.news_reply_post);
		newsReplyPost.setOnClickListener(newsDetailOnClickListener);
		ImageButton newsReplyImgBtn = (ImageButton) findViewById(R.id.news_reply_img_btn);
		newsReplyImgBtn.setOnClickListener(newsDetailOnClickListener);
		
		
		//获取传送的数据
		Intent intent = getIntent();
		Bundle bundle = intent.getExtras();
		String categoryName = bundle.getString("categoryTitle");
		TextView titleBarTitle = (TextView) findViewById(R.id.newsdetail_titlebar_title);
		//设置标题栏的标题
		titleBarTitle.setText(categoryName);
		//获取新闻集合
		Serializable serializable = bundle.getSerializable("newsData");
		mNewsData = (ArrayList<HashMap<String, Object>>) serializable;

		//获取点击位置
		mCursor = mPosition = bundle.getInt("position");
		
		mNewsBodyFlipper = (ViewFlipper) findViewById(R.id.news_body_flipper);
		// 获取LayoutInflater对象
		mNewsbodyLayoutInflater = getLayoutInflater();
		
		inflateView(0);
		//启动线程
		new UpdateNewsThread().start();
	}

	/**
	 * 显示上一条新闻
	 */
	private void showPrevious() {
		if(mPosition > 0) {
			mPosition--;
			//记录当前新闻编号
			HashMap<String, Object> hashMap = mNewsData.get(mPosition);
			mNid = (Integer) hashMap.get("nid");
			if(mCursor > mPosition){
				mCursor = mPosition;
				inflateView(0);
				mNewsBodyFlipper.showNext();
			}
			mNewsBodyFlipper.setInAnimation(this, R.anim.push_right_in);	//设置下一页进来时的动画
			mNewsBodyFlipper.setOutAnimation(this, R.anim.push_right_out);	//设置当前页出去的动画
			mNewsBodyFlipper.showPrevious();
		}
		else {
			Toast.makeText(NewsDetailActivity.this, "没有上一篇新闻", Toast.LENGTH_SHORT).show();
		}
	}

	/**
	 * 显示下一条新闻
	 */
	private void showNext() {
		if(mPosition < mNewsData.size() - 1){
			// 设置下一屏动画
			mNewsBodyFlipper.setInAnimation(this, R.anim.push_left_in);
			mNewsBodyFlipper.setOutAnimation(this, R.anim.push_left_out);
			mPosition++;
			//记录当前新闻编号
			HashMap<String, Object> hashMap = mNewsData.get(mPosition);
			mNid = (Integer) hashMap.get("nid");
			if(mPosition >= mNewsBodyFlipper.getChildCount()){
				inflateView(mNewsBodyFlipper.getChildCount());
			}
			mNewsBodyFlipper.showNext();
		} else {
			Toast.makeText(NewsDetailActivity.this, "没有下篇新闻", Toast.LENGTH_SHORT).show();
		}
	}

	private void inflateView(int index) {
		//获取点击新闻信息
		HashMap<String, Object> hashMap = mNewsData.get(mPosition);
		mNid = (Integer) hashMap.get("nid");

		View mNewsBodyView = mNewsbodyLayoutInflater.inflate(
				R.layout.newsbody_layout, null);
		mNewsDetailTitleBarComm.setText(hashMap.get("newslist_item_comments").toString() + "跟帖");
		//新闻标题
		TextView newsTitle = (TextView) mNewsBodyView
				.findViewById(R.id.news_body_title);
		newsTitle.setText(hashMap.get("newslist_item_title").toString());
		//新闻的出处和发布时间
		TextView newsPtimeAndSource = (TextView) mNewsBodyView
				.findViewById(R.id.news_body_ptime_source);
		newsPtimeAndSource.setText(hashMap.get("newslist_item_source").toString() 
				+ "		" + hashMap.get("newslist_item_ptime").toString());
		mNewsBodyDetail = (ConstomTextView) mNewsBodyView
				.findViewById(R.id.news_body_details);
		mNewsBodyDetail.setText(getNewsBody());
		mNewsBodyFlipper.addView(mNewsBodyView, index);
		mNewsBodyDetail.setOnTouchListener(new NewsBodyOntouchListener());
	}

	// 定义内部类--用于处理标题栏的按钮的触发事件
	private class NewsDetailOnClickListener implements OnClickListener {

		@Override
		public void onClick(View v) {
			InputMethodManager m = (InputMethodManager) mNewsReplyEditText.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
			// TODO Auto-generated method stub
			switch (v.getId()) {
			//上一篇
			case R.id.newsdetail_titlebar_previous:
				showPrevious();
				break;
			//下一篇
			case R.id.newsdetail_titlebar_next:
				showNext();
				break;
			//跟帖
			case R.id.newsdetail_titlebar_comments:
				Intent intent = new Intent(NewsDetailActivity.this,
						CommentsActivity.class);
				intent.putExtra("nid", mNid);
				startActivity(intent);
				break;
			//“写跟帖”图片
			case R.id.news_reply_img_btn:
				mNewsReplyEditLayout.setVisibility(View.VISIBLE);
				mNewsReplyImgLayout.setVisibility(View.GONE);
				mNewsReplyEditText.requestFocus();
				//显示输入法
				m.toggleSoftInput(0, InputMethodManager.SHOW_IMPLICIT);
				keyboardShow = true;
				break;
			//分享按钮
			case R.id.news_share_btn:
				Intent shareIntent = new Intent(Intent.ACTION_SEND);
				//纯文本
				shareIntent.setType("text/plain");
				shareIntent.putExtra(Intent.EXTRA_SUBJECT, "分享");
				shareIntent.putExtra(Intent.EXTRA_TEXT, "我想将这个分享给你...."+ getTitle());
				startActivity(Intent.createChooser(shareIntent, getTitle()));
				break;
			//收藏按钮
			case R.id.news_favorites_btn:
				Toast.makeText(NewsDetailActivity.this, "收藏成功", Toast.LENGTH_SHORT).show();
				break;
			//发表按钮
			case R.id.news_reply_post:
				//隐藏输入法
				m.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
				String str = mNewsReplyEditText.getText().toString();
				if(str.equals("")){
					Toast.makeText(NewsDetailActivity.this, "不能为空",
							Toast.LENGTH_SHORT).show();
				}
				else {
					mNewsReplyEditLayout.post(new PostCommentsThread(mNid, "广州市",
							str + "",
							new NewsDetailActivity()));
					mNewsReplyEditLayout.setVisibility(View.GONE);
					mNewsReplyImgLayout.setVisibility(View.VISIBLE);
				}
				break;
			}
		}
	}

	private class NewsBodyOntouchListener implements OnTouchListener {

		@Override
		public boolean onTouch(View v, MotionEvent event) {
			// TODO Auto-generated method stub
			switch (event.getAction()) {
				//手指按下
			case MotionEvent.ACTION_DOWN:
				if(keyboardShow){
					mNewsReplyEditLayout.setVisibility(View.GONE);
					mNewsReplyImgLayout.setVisibility(View.VISIBLE);
					//隐藏输入法
					InputMethodManager m = (InputMethodManager) mNewsReplyEditText.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
					m.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
					keyboardShow = false;
				}
				//得到按下的横坐标的位置
				mStartX = event.getX();
				break;
			case MotionEvent.ACTION_UP:
				// 往左滑动
				if (event.getX() < mStartX) {
					showNext();
				}
				// 往右滑动
				else if (event.getX() > mStartX) {
					showPrevious();
				}
				break;
			}
			return true;
		}
	}
	
	/**
	 * 定义一个线程类，用来更新获取到新闻的信息
	 * @author Administrator
	 *
	 */
	private class UpdateNewsThread extends Thread {
		@Override
		public void run() {
			// TODO Auto-generated method stub
			ArrayList<HashMap<String, Object>> newsStr = getNewsBody();
			Message msg = mHandler.obtainMessage();	//获取msg
			msg.arg1 = FINISH;			
			msg.obj = newsStr;
			mHandler.sendMessage(msg);	//给Handler发送信息
		}
	}
	
	
	/**
	 * 获取新闻详细信息
	 * @return
	 */
	private ArrayList<HashMap<String, Object>> getNewsBody(){
		//String retStr = "网络连接失败,请稍后再试";
		ArrayList<HashMap<String, Object>> bodylist = new ArrayList<HashMap<String,Object>>();
		
		SyncHttp syncHttp = new SyncHttp();
		//模拟器:url = "http://10.0.2.2:8080/web/getNews";
		//本机:http://127.0.0.1:8080
		//wifi局域网:http://192.168.220.1:8080
		String url = "http://10.0.2.2:8080/web/getNews";
		String params = "nid=" + mNid;
		try {
			String retString = syncHttp.httpGet(url, params);
			JSONObject  jsonObject = new JSONObject(retString);
			//获取返回码，0表示成功
			int retCode = jsonObject.getInt("ret");
			if(retCode == 0) {
				JSONObject dataObject = jsonObject.getJSONObject("data");
				JSONObject newsObject = dataObject.getJSONObject("news");
				//retStr = newsObject.getString("body");
				JSONArray bodyArray = newsObject.getJSONArray("body");
				for(int i = 0; i < bodyArray.length(); i++) {
					JSONObject object = (JSONObject) bodyArray.opt(i);
					HashMap<String, Object> hashMap = new HashMap<String, Object>();
					hashMap.put("index", object.get("index"));
					hashMap.put("type", object.get("type"));
					hashMap.put("value", object.get("value"));
					bodylist.add(hashMap);
				}
			}
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}
		return bodylist;
	}
	
	
	@Override
	public boolean onCreatePanelMenu(int featureId, Menu menu) {
		// TODO Auto-generated method stub
		menu.add(0, 0, 0, "分享");
		return true;
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		switch(item.getItemId()) {
		case 0:
			Intent shareIntent = new Intent(Intent.ACTION_SEND);
			//纯文本
			shareIntent.setType("text/plain");
			shareIntent.putExtra(Intent.EXTRA_SUBJECT, "分享");
			shareIntent.putExtra(Intent.EXTRA_TEXT, "我想把这个分享给你:" + getTitle());
			shareIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			startActivity(Intent.createChooser(shareIntent, getTitle()));
			System.out.println(getTitle());
			break;
			
		}
		return super.onOptionsItemSelected(item);
	}
}

 

 

这段代码设计到以下几个关键点：

1.异步更新新闻详细内容。 这里是用Handler来实现线程异步。

2.实现上下篇新闻切换的功能。

3.自定义TextView的实现类ConstomTextView。

 

 

关于上面的代码已经实现得比较完善了，不知道是否还可以进行优化。

那么关于新闻详细内容显示的业务逻辑实现就写到这里，然后关于小巫新闻客户端开发的系列博客就暂时记录到这里，感谢网友们的支持。因为新闻回复的内容具体实现没什么可说的，只要把前面的业务逻辑实现弄懂了，新闻回复的业务逻辑也就没什么难的。

  如果网友们对小巫新闻客户端那部分有疑问，可以给我留言，小巫会把自己知道的东西都写出来。