ServiceConnection.onServiceConnected（）中的ClassCastException。綁定服務

Question

我嘗試將服務綁定到活動。但我在這裏得到ClassCastException：

pos.main.client.ClientBackground_Service.ClientBackground_Binder binder = (ClientBackground_Binder) service; 

我不明白爲什麼我得到這個異常。該服務按流程運行。該活動想要獲取並使用它。

這裏有兩個類：

public class ClientMain_Activity extends Activity 
{ 
private boolean m_IsBound = false; 


public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 

    if (isMyServiceRunning()) 
    { 
     Intent intent = new Intent(this, ClientBackground_Service.class); 
     bindService(intent, m_ServiceConnection, Context.BIND_AUTO_CREATE); 

    } 
} 

private ServiceConnection m_ServiceConnection = new ServiceConnection() 
{ 
    public void onServiceConnected(ComponentName name, IBinder service) 
    { 

     pos.main.client.ClientBackground_Service.ClientBackground_Binder binder = (ClientBackground_Binder) service; 
     // m_Service = binder.getService(); 
     m_IsBound = true; 
    } 
}; 
} 

服務類：

public class ClientBackground_Service extends Service implements 
    I_ClientBackground_Service 
{ 

private final IBinder m_clientbackground_binding = new ClientBackground_Binder(); 


public class ClientBackground_Binder extends Binder 
{ 

} 

@Override 
public IBinder onBind(Intent intent) 
{ 
    return m_clientbackground_binding; 
} 

@Override 
public void onStart(Intent intent, int startId) 
{ 
    super.onStart(intent, startId); 
    Log.i(this.getClass().getName(), " ClientBackground_Service started"); 
} 
} 

Answer 1

請參閱：

• ClassCastException when binding to local service from another Activity
• http://developer.android.com/guide/developing/tools/aidl.html