新浪微博Android开发(三)

MainService类，执行流程：

代码：

package com.shaccp.logic;

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

import com.shaccp.ui.Home;

import weibo4andriod.Status;
import weibo4andriod.User;
import weibo4andriod.Weibo;
import weibo4andriod.WeiboException;
import android.app.Activity;
import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;

publicclass MainService extends Service implements Runnable {

 publicstatic Weibo weibo =new Weibo();
 publicstatic List<Activity> allActivity =new ArrayList<Activity>();
 publicstatic List<Task> allTask =new ArrayList<Task>();
 
 publicstatic User nowUser;


 publicboolean isrun =true;
 
 publicstatic Activity getActivityByName(String name){
  
  for(Activity ac:allActivity){
   if(ac.getClass().getName().indexOf(name)>=0){
    return ac;
   }
  }
  
  returnnull;
 }

 //启动线程
 @Override
 publicvoid onCreate() {
  // TODO Auto-generated method stub
super.onCreate();
  Thread t =new Thread(this);
  t.start();
 }


 @Override
 publicvoid onDestroy() {
  // TODO Auto-generated method stub
super.onDestroy();
 }

 publicstaticvoid newTask(Task task) {
  allTask.add(task);
 }

 
 //执行任务，业务逻辑调用，执行完后移出任务
publicvoid doTask(Task task) {
  
  Message mess = handler.obtainMessage();
  mess.what = task.getTaskId();
  System.out.println("#####----doTask-----");
  try {
   switch (task.getTaskId()) {
   
   case Task.TASK_LOGIN:
    
    weibo.setUserId((String)task.getParams().get("user"));
    weibo.setPassword((String)task.getParams().get("pass"));
       try {
     User u = weibo.verifyCredentials();
     nowUser = u;
     mess.obj = u;
     
    } catch (WeiboException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
     mess.obj =null;
    }
    
    break;

   case Task.TASK_GET_TIMELINE:
   
     List<Status> allStatus = weibo.getFriendsTimeline();
     System.out.println(allStatus);
     mess.obj=allStatus;
   
    break;
    
   case Task.TASK_NEW_WEIBO:
    
    break;
   }
  } catch (WeiboException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  handler.sendMessage(mess); //发送消息
  allTask.remove(task);      //执行任务结束，移出任务
  

 }

    //侦听任务
 @Override
 publicvoid run() {
  // TODO Auto-generated method stub
while (isrun) {
   System.out.println("------RUN-----------");
   Task lastTask =null;
   if (allTask.size() >0) {
    lastTask = allTask.get(0);
    doTask(lastTask);

   }
   
   try{Thread.sleep(1000);}catch(Exception e){};
  }
 }

 @Override
 public IBinder onBind(Intent arg0) {
  // TODO Auto-generated method stub
returnnull;
 }
 
 
 //更新UI
private Handler handler =new Handler(){

  @Override
  publicvoid handleMessage(Message msg) {
   // TODO Auto-generated method stub
super.handleMessage(msg);
   System.out.println("~~~~Handler~~~~~~~~~");
   switch (msg.what) {
   case Task.TASK_LOGIN:
    IWeiboActivity ia = (IWeiboActivity)getActivityByName("Login");
    ia.refresh(msg.what,msg.obj);
    break;

   case Task.TASK_GET_TIMELINE:
    IWeiboActivity ia2 = (IWeiboActivity)getActivityByName("Home");
    ia2.refresh(new Integer(Home.REFRESH_WEIBO),msg.obj);
    break;
   }
  }
  
 };

}