安卓开发解决android.os.NetworkOnMainThreadException异常方法(主线程不能直接调用webservice)

// 详见StrictMode文档   StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()  
        .detectDiskReads()  
        .detectDiskWrites()  
        .detectNetwork()   // or .detectAll() for all detectable problems  
        .penaltyLog()  
        .build());  
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()  
        .detectLeakedSqlLiteObjects()  
        .detectLeakedClosableObjects()  
        .penaltyLog()  
        .penaltyDeath()  
        .build());

public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);  
      setContentView(R.layout.main);  
      // 启动线程执行下载任务  
      new Thread(downloadRun).start(); 
}

/**
* 下载线程
*/
Runnable downloadRun = new Runnable(){
@Override
public void run() {
// TODO Auto-generated method stub
updateListView();
}
};