bindService不能触发onServiceConnected方法

在android项目中用到AIDL，今天碰到了一个诡异的问题，花费了半天的时间终于解决了。具体原因有待细究
 
bindService( service, connection, BIND_AUTO_CREATE ) 之后一直不调用
connection中的onServiceConnected方法
复查了很多容易出错的问题（有问题的童鞋可以复查下面几条）：
1、服务器端的service声明，要和客户端bindService的第一个参数匹配，不然客户端启动不了这个服务。
              android:name="com.eebbk.keywordsearch.ExamCommentService"
            android:process=":remote" >
           
               
               
           
 
2、服务器端service必须  return实现AIDL接口ITestService.Stub   的binder
        @Override
        public IBinder onBind( Intent intent )
        {
               // TODO Auto-generated method stub
               return binder; // 返回AIDL接口实例化对象;
        }
3、如果前面两种方法都没有解决，那么很有可能就是我要提到的这个问题了，往下看
  我的问题代码如下：

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;


/**
 * Class Name: SearchClientActivity.java Function:
 * 
 * Modifications:
 * 
 * @author tm  DateTime 2013-1-23 下午4:20:20
 * @version 1.0
 */
public class SearchClientActivity extends Activity
{
	
	private static final String TAG = "SearchClientActivity";
	private ITestService tService = null;
	// 创建远程调用对象
	private ServiceConnection connection = new ServiceConnection( )
	{
		
		public void onServiceConnected( ComponentName name, IBinder service )
		{
			// TODO Auto-generated method stub
			// 从远程service中获得AIDL实例化对象
			tService = ITestService.Stub.asInterface( service );
			System.out.println( "Bind Success:" + tService );
		}
		
		public void onServiceDisconnected( ComponentName name )
		{
			// TODO Auto-generated method stub
			tService = null;
		}
	};
	
	@Override
	protected void onCreate( Bundle savedInstanceState )
	{
		// TODO Auto-generated method stub
		super.onCreate( savedInstanceState );
		setContentView( R.layout.main );
		
		Intent service = new Intent( ITestService.class.getName( ) );
		// 绑定AIDL
		bindService( service, connection, BIND_AUTO_CREATE );


		//tService为空 死循环等待异步任务结束 
		while ( tService == null )
		{
			Thread.sleep( 500 );
		}
		
		try
		{
			//在客户端调用服务器端的方法
			List< SearchResultItem > resultItems = tService.getSearchResulet( "" );
			
			for ( int i = 0; i < resultItems.size( ); i++ )
			{
				Log.i( TAG, resultItems.get( i ).getIndex( ) + resultItems.get( i ).getDetailContent( ) );
			}
		}
		catch ( RemoteException e )
		{
			// TODO Auto-generated catch block
			e.printStackTrace( );
		}
		
	}
	
	@Override
	protected void onDestroy( )
	{
		// TODO Auto-generated method stub
		super.onDestroy( );
		unbindService( connection );
	}
	
}

结果一直陷入死循环，不跑onServiceConnected方法。

解决方法：不要在onCreate中等待得到AIDL的接口服务实例，即上面代码中的tService

import java.util.List;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.widget.ListView;

import com.eebbk.searchclientaidl.R;

public class SearchClientAIDLActivity extends Activity {
	
	private static final String TAG = "SearchClientAIDLActivity";

	private ITestService tService;
	
	//创建远程调用对象
	private ServiceConnection connection = new ServiceConnection(){

		public void onServiceConnected(ComponentName name, IBinder service) {
			// TODO Auto-generated method stub
			System.out.println(" onServiceConnected ");
			//从远程service中获得AIDL实例化对象
			tService = ITestService.Stub.asInterface(service);
			System.out.println("Bind Success:"+tService);
			
			new Thread( new Runnable( )
			{
				
				@Override
				public void run( )
				{
					Log.v( TAG, "开启新线程!" );
					getResults( );
				}
			} ).start( );
		}

		public void onServiceDisconnected(ComponentName name) {
			// TODO Auto-generated method stub
			tService = null;
		}
	};
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
                 
        Intent service = new Intent( ITestService.class.getName());
		//绑定AIDL
		bindService(service, connection, BIND_AUTO_CREATE);
		
    }

    private void getResults()
    {
		try
		{
			List< SearchResultItem > resultItems = tService.getSearchResulet( "" );
			
			for ( int i = 0; i < resultItems.size( ); i++ )
			{
				Log.i( TAG, resultItems.get( i ).getIndex( ) + resultItems.get( i ).getDetailContent( ) );
			}
		}
		catch ( RemoteException e )
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    
	
	@Override
	protected void onDestroy( )
	{
		// TODO Auto-generated method stub
		super.onDestroy( );
		unbindService( connection );
	}
}

bindService的具体流程可以参考

http://blog.csdn.net/luoshengyang/article/details/6745181