小编Asi*_*fiq的帖子

请考虑以下代码.在Service.onStart()方法中我已经创建并启动了一个应该显示Toast消息的线程,但它不起作用!

public class MyService extends Service{

    private static final String TAG = "MyService";  
    @Override
    public IBinder onBind(Intent intent)
    {
        return null;    
    }       

    @Override   
    public void onCreate()
    {   
    Toast.makeText(this, "My Service Created", Toast.LENGTH_SHORT).show();
         }  
    @Override
    public void onDestroy() 
    {   
    Toast.makeText(this, "My Service Stopped", Toast.LENGTH_SHORT).show();  
    }   
    @Override
    public void onStart(Intent intent, int startid)
    {
      Toast.makeText(this, "My Service Started", Toast.LENGTH_SHORT).show();
      DBIteratorThread dbThread=new DBIteratorThread();
      dbThread.myService=this;
      Thread t1 = new Thread(dbThread);
           t1.start();
    }

}
class DBIteratorThread  implements Runnable
{

    MyService myService;

    public void …

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