腾讯微博教程分步走之第二步(含原码)

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要实现功能例图

首先看布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#ffffffff"
        android:orientation="vertical" >

        <ListView
            android:id="@id/android:list"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:cacheColorHint="#00000000"
            android:clipToPadding="false"
            android:divider="@drawable/list_divider"
            android:fadingEdge="none"
            android:fastScrollEnabled="false"
            android:paddingBottom="50.0dip"
            android:paddingTop="45.0dip" />

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center_horizontal"
            android:paddingTop="15.0dip"
            android:text=""
            android:textColor="#ff5a5a5a"
            android:textSize="20.0sp"
            android:visibility="invisible" />
    </LinearLayout>

    <include
        android:id="@+id/home_top"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        layout="@layout/top_panel" />

</FrameLayout>

其实就是一个 tabhost

再看看具体到每一项的显示的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/listitem_selector"
    android:orientation="horizontal"
    android:paddingTop="3.0dip" >

    <RelativeLayout
        android:layout_width="50.0dip"
        android:layout_height="50.0dip"
        android:layout_weight="0.0" >

        <ImageView
            android:id="@+id/home_headicon"
            android:layout_width="45.0dip"
            android:layout_height="45.0dip"
            android:layout_centerInParent="true"
            android:scaleType="fitCenter" />
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1.0"
        android:orientation="vertical"
        android:padding="4.0dip" >

        <TextView
            android:id="@+id/home_nick"
            android:layout_width="wrap_content"
            android:layout_height="32.0dip"
            android:layout_alignParentLeft="true"
            android:textColor="#000000"
            android:textSize="14.0sp" />

        <ImageView
            android:id="@+id/home_vip"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toRightOf="@id/home_nick"
            android:src="@drawable/vip" />

        <TextView
            android:id="@+id/home_timestamp"
            android:layout_width="wrap_content"
            android:layout_height="32.0dip"
            android:layout_alignParentRight="true"
            android:textColor="#ff000000"
            android:textSize="8.0sp" />

        <ImageView
            android:id="@+id/home_hasimage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toLeftOf="@id/home_timestamp" />

        <TextView
            android:id="@+id/home_origtext"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/home_nick"
            android:textColor="#081008"
            android:textSize="12.0sp" />

        <TextView
            android:id="@+id/home_source"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_below="@id/home_origtext"
            android:layout_marginLeft="6.0dip"
            android:textColor="#101810"
            android:textSize="10.0sp" />
    </RelativeLayout>

</LinearLayout>

这种布局只要多试几次实现起来是没有难度的

再看实现代码

package com.android.caigang.view;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.regex.Pattern;

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

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.SpannableString;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.android.caigang.R;
import com.android.caigang.db.DataHelper;
import com.android.caigang.model.UserInfo;
import com.android.caigang.util.AsyncImageLoader;
import com.android.caigang.util.AsyncImageLoader.ImageCallback;
import com.android.caigang.util.DataBaseContext;
import com.android.caigang.util.RegexUtil;
import com.android.caigang.util.TextUtil;
import com.android.caigang.util.TimeUtil;
import com.android.caigang.util.WeiboContext;
import com.mime.qweibo.examples.MyWeiboSync;
import com.mime.qweibo.examples.QWeiboType.PageFlag;

public class HomeTimeLineActivity extends ListActivity implements OnItemClickListener,OnItemLongClickListener{
    
    private DataHelper dataHelper;
    private UserInfo user;
    private MyWeiboSync weibo;
    private ListView listView;
    private HomeAdapter adapter;
    private JSONArray array;
    private AsyncImageLoader asyncImageLoader;
    private Handler handler;
    private ProgressDialog progressDialog;
    private View top_panel;
    private Button top_btn_left;
    private Button top_btn_right;
    private TextView top_title;
    private LinearLayout list_footer;
    private TextView tv_msg;
    private LinearLayout loading;
    private List<JSONObject> list;//微博数据列表
    private ExecutorService executorService;
    private static int PAGE_SIZE = 20;//每页显示的微博条数
    private int TOTAL_PAGE = 0;//当前已经记在的微博页数
    private static int THREADPOOL_SIZE = 4;//线程池的大小
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home);
        setUpViews();
        setUpListeners();
        
        dataHelper = DataBaseContext.getInstance(getApplicationContext());
        weibo = WeiboContext.getInstance();
        
        List<UserInfo> userList = dataHelper.GetUserList(false);
        
        SharedPreferences preferences = getSharedPreferences("default_user",Activity.MODE_PRIVATE);
        String nick = preferences.getString("user_default_nick", "");//取得默认账号信息
        
        if (nick != "") {
            user = dataHelper.getUserByName(nick,userList);
            top_title.setText(nick);//顶部工具栏昵称
        }
        
        weibo.setAccessTokenKey(user.getToken());
        weibo.setAccessTokenSecrect(user.getTokenSecret());
        
        progressDialog = new ProgressDialog(HomeTimeLineActivity.this);// 生成一个进度条
        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        progressDialog.setTitle("请稍等");
        progressDialog.setMessage("正在读取数据中!");
        handler = new GetHomeTimeLineHandler();
        
        executorService.submit(new GetHomeTimeLineThread());//耗时操作,开启一个新线程获取数据
        progressDialog.show();
    }
    
    private void setUpViews(){
        list_footer = (LinearLayout)LayoutInflater.from(HomeTimeLineActivity.this).inflate(R.layout.list_footer, null);
        tv_msg = (TextView)list_footer.findViewById(R.id.tv_msg);
        loading = (LinearLayout)list_footer.findViewById(R.id.loading);
        listView = getListView();
        top_panel = (View)findViewById(R.id.home_top);
        top_btn_left = (Button)top_panel.findViewById(R.id.top_btn_left);
        top_btn_right = (Button)top_panel.findViewById(R.id.top_btn_right);
        top_title = (TextView)top_panel.findViewById(R.id.top_title);
        listView.addFooterView(list_footer);//这儿是关键中的关键呀，利用FooterVIew分页动态加载
        list = new ArrayList<JSONObject>();
        executorService = Executors.newFixedThreadPool(THREADPOOL_SIZE);
    }
    
    private void setUpListeners(){
        listView.setOnItemClickListener(this);
        listView.setOnItemLongClickListener(this);
        top_btn_right.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(HomeTimeLineActivity.this,AddWeiboActivity.class);
                intent.putExtra("tip", "写广播");
                intent.putExtra("content", "");
                intent.putExtra("from_flag", "write");
                startActivity(intent);
            }
        });
        tv_msg.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                //Toast.makeText(HomeTimeLineActivity.this, "我将消失了", Toast.LENGTH_SHORT).show();
                executorService.submit(new GetHomeTimeLineThread());
                tv_msg.setVisibility(View.GONE);//隐藏更多提示的TextView
                loading.setVisibility(View.VISIBLE);//显示最下方的进度条
            }
        });
    }
    
    class GetHomeTimeLineHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {
            adapter = new HomeAdapter(HomeTimeLineActivity.this, list);
            if(TOTAL_PAGE>1){
                adapter.notifyDataSetChanged();
            }
            if(TOTAL_PAGE==1){
                listView.setAdapter(adapter);
            }
            listView.setSelection((TOTAL_PAGE-1)*PAGE_SIZE+1);//设置最新获取一页数据成功后显示数据的起始数据
            progressDialog.dismiss();// 关闭进度条
            loading.setVisibility(View.GONE);//隐藏下方的进度条
            tv_msg.setVisibility(View.VISIBLE);//显示出更多提示TextView
        }
    }
    
    class GetHomeTimeLineThread implements Runnable{
        @Override
        public void run() {
            refreshList();
            Message msg = handler.obtainMessage();//通知线程来处理范围的数据
            handler.sendMessage(msg);            
        }
    }
    
    private void refreshList(){
        String jsonStr = weibo.getHomeMsg(weibo.getAccessTokenKey(), weibo.getAccessTokenSecrect(), PageFlag.PageFlag_First, (TOTAL_PAGE+1)*PAGE_SIZE);
        try {
            JSONObject dataObj = new JSONObject(jsonStr).getJSONObject("data");
            array = dataObj.getJSONArray("info");
            if(array!=null&&array.length()>0){
                TOTAL_PAGE++;
                list.clear();
                int lenth =array.length();
                for(int i = 0;i<lenth;i++){
                    list.add(array.optJSONObject(i));
                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
    
    
    class HomeAdapter extends BaseAdapter {
        private Context context;
        private LayoutInflater inflater;
        private List<JSONObject> list;
        
        public HomeAdapter(Context context, List<JSONObject> list) {
            super();
            this.context = context;
            this.list = list;
            this.inflater = LayoutInflater.from(context);
        }

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

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

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

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            asyncImageLoader = new AsyncImageLoader();
            HomeViewHolder viewHolder = new HomeViewHolder(); 
            JSONObject data = (JSONObject)list.get(position);
            JSONObject source = null;
            convertView = inflater.inflate(R.layout.home_list_item, null);
            
            viewHolder.home_headicon = (ImageView) convertView.findViewById(R.id.home_headicon);
            viewHolder.home_nick = (TextView) convertView.findViewById(R.id.home_nick);
            viewHolder.home_vip = (ImageView) convertView.findViewById(R.id.home_vip);
            viewHolder.home_hasimage = (ImageView) convertView.findViewById(R.id.home_hasimage);
            viewHolder.home_timestamp = (TextView) convertView.findViewById(R.id.home_timestamp);
            viewHolder.home_origtext = (TextView) convertView.findViewById(R.id.home_origtext);
            viewHolder.home_source = (TextView) convertView.findViewById(R.id.home_source);
            
            if(data!=null){
                try {
                    convertView.setTag(data.get("id"));
                    //viewHolder.home_headicon.setImageDrawable(ImageUtil.getDrawableFromUrl(data.getString("head")+"/100"));//同步加载图片
                    viewHolder.home_nick.setText(data.getString("nick"));
                    if(data.getInt("isvip")!=1){
                        viewHolder.home_vip.setVisibility(View.GONE);//非vip隐藏vip标志
                    }
                    viewHolder.home_timestamp.setText(TimeUtil.converTime(Long.parseLong(data.getString("timestamp"))));
                    
                    //异步加载图片
                    Drawable cachedImage = asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.home_headicon, new ImageCallback(){
                        @Override
                        public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {
                            imageView.setImageDrawable(imageDrawable);
                        }
                    });
                    if (cachedImage == null) {
                        viewHolder.home_headicon.setImageResource(R.drawable.icon);
                    } else {
                        viewHolder.home_headicon.setImageDrawable(cachedImage);
                    }
                    
                    if(!"null".equals(data.getString("image"))){
                        viewHolder.home_hasimage.setImageResource(R.drawable.hasimage);
                    }
                    
                    //微博内容开始
                    String origtext = data.getString("origtext");
                    
                    SpannableString spannable = new SpannableString(origtext);
                    
                    
                    /*spannable = TextUtil.decorateFaceInStr(spannable, RegexUtil.getStartAndEndIndex(data.getString("origtext"), Pattern.compile("\\/[\u4e00-\u9fa5a-zA-Z]{1,3}")), getResources());//解析成本地表情
                    spannable = TextUtil.decorateRefersInStr(spannable, RegexUtil.getStartAndEndIndex(origtext, Pattern.compile("@.*:")), getResources());//高亮显示微薄转发，回复者昵称
                    spannable = TextUtil.decorateTopicInStr(spannable, RegexUtil.getStartAndEndIndex(origtext, Pattern.compile("#.*#")), getResources());//高亮显示话题名称
                    spannable = TextUtil.decorateTopicInStr(spannable, RegexUtil.getStartAndEndIndex(origtext, Pattern.compile("^http://\\w+(\\.\\w+|)+(/\\w+)*(/\\w+\\.(\\w+|))?")), getResources());//高亮显示url地址
                    */
                    viewHolder.home_origtext.setText(spannable);
                    //微博内容设置结束
                    
                    
                    //处理引用的转播，评论的微博内容
                    try {
                        if(!"null".equals(data.getString("source"))){
                            source = data.getJSONObject("source");
                        }
                    } catch (JSONException e1) {
                        e1.printStackTrace(); 
                    }
                    if(source!=null){
                        String home_source_text = null;
                        boolean isvip = source.getInt("isvip")==1?true:false;
                        if(isvip){
                            home_source_text = "@"+source.getString("nick")+"======:"+source.getString("origtext");//用6个连续的=号来替换vip标志图标
                        }else{
                            home_source_text = "@"+source.getString("nick")+":"+source.getString("origtext");
                        }
                        SpannableString spannableSource = new SpannableString(home_source_text);
                        spannableSource = TextUtil.decorateRefersInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("@.*:")), getResources());
                        spannableSource = TextUtil.decorateTopicInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("#.*#")), getResources());
                        spannableSource = TextUtil.decorateTopicInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("^http://\\w+(\\.\\w+|)+(/\\w+)*(/\\w+\\.(\\w+|))?")), getResources());
                        
                        if(isvip){
                            spannableSource = TextUtil.decorateVipInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("======")), getResources());//替换为vip认证图片
                        }
                        viewHolder.home_source.setText(spannableSource);
                        viewHolder.home_source.setBackgroundResource(R.drawable.home_source_bg);
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            return convertView;
        }
    }
    
    static class HomeViewHolder {
        private ImageView home_headicon;
        private TextView home_nick;
        private ImageView home_vip;
        private TextView home_timestamp;
        private TextView home_origtext;
        private TextView home_source;
        private ImageView home_hasimage;
    }

    @Override
    public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position,long arg3) {
        CharSequence [] items = null;
        try {
            items= new CharSequence[]{"转播","对话","点评","收藏",((JSONObject)array.opt(position)).getString("nick"),"取消"};
        } catch (JSONException e) {
            e.printStackTrace();
        }
        new AlertDialog.Builder(HomeTimeLineActivity.this).setTitle("选项").setItems(items,new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                        switch (which) {
                        case 0: {
                        }
                            break;
                        case 1: {
                        }
                            break;
                        case 2: {
                        }
                            break;
                        case 3: {
                        }
                            break;
                        case 4: {
                        }
                            break;
                        case 5: {
                        }
                            break;
                        default:
                            break;
                        }
            }
        }).show();
        return false;
    }

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
        JSONObject weiboInfo = (JSONObject)array.opt(position);
        Intent intent = new Intent(HomeTimeLineActivity.this, WeiboDetailActivity.class);
        try {
            intent.putExtra("weiboid", weiboInfo.getString("id"));
            startActivity(intent);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        super.onCreateOptionsMenu(menu);
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.menu.home_timeline_menu, menu);
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_settings: {

        }
            break;
        case R.id.menu_official: {

        }
            break;
        case R.id.menu_feedback: {

        }
            break;
        case R.id.menu_account: {
            Intent intent = new Intent(HomeTimeLineActivity.this,
                    AccountActivity.class);
            startActivity(intent);
        }
            break;
        case R.id.menu_about: {
            Intent intent = new Intent(HomeTimeLineActivity.this,
                    AddWeiboActivity.class);
            startActivity(intent);
        }
            break;
        case R.id.menu_quit: {

        }
            break;
        default:
            break;
        }
        return true;
    }
}

异步加载图片类

package com.android.caigang.util;

import java.io.IOException;
import java.io.InputStream;
import java.lang.ref.SoftReference;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;

import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

public class AsyncImageLoader {
    //SoftReference�������ã���Ϊ�˸�õ�Ϊ��ϵͳ���ձ���
    private HashMap<String, SoftReference<Drawable>> imageCache;
    public AsyncImageLoader() {
        imageCache = new HashMap<String, SoftReference<Drawable>>();
    }
    public Drawable loadDrawable(final String imageUrl,final ImageView imageView, final ImageCallback imageCallback){
        if (imageCache.containsKey(imageUrl)) {
            //�ӻ����л�ȡ
            SoftReference<Drawable> softReference = imageCache.get(imageUrl);
            Drawable drawable = softReference.get();
            if (drawable != null) {
                return drawable;
            }
        }
        final Handler handler = new Handler() {
            public void handleMessage(Message message) {
                imageCallback.imageLoaded((Drawable) message.obj, imageView,imageUrl);
            }
        };
        //������һ���µ��߳�����ͼƬ
        new Thread() {
            @Override
            public void run() {
                Drawable drawable = null;
                try {
                    drawable = ImageUtil.geRoundDrawableFromUrl(imageUrl, 20);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                imageCache.put(imageUrl, new SoftReference<Drawable>(drawable));
                Message message = handler.obtainMessage(0, drawable);
                handler.sendMessage(message);
            }
        }.start();
        return null;
    }
    //�ص��ӿ�
    public interface ImageCallback {
        public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl);
    }
}

相关实现如上 大家也多多思考一下 都不难