Android本地服务示例,bindservice()和ServiceConnection()

我有一个问题与@mnish大约一年前提出的这个 question有关.

请看看他的问题和代码.他实现了一个ServiceConnection()并将其传递给bindService().这遵循顶部附近的Service文档中的本地服务示例.

我想实现本地服务示例,所以我试图从@mnish问题/答案中添加一些细节.在ServiceConnection()中@mnish有这条线让我感到困惑：

mService = ILocService.Stub.asInterface(iservice);

我理解@mnish编写了这段代码,但有没有人知道ILocService是什么,并且知道如何创建自己的ILocService？这个结构记录在哪里,我需要它吗？ IBinder的价值来自何处？

他可能正在使用Android界面定义语言(AIDL)
http://developer.android.com/guide/components/aidl.html

因此,他必须使用服务器端实现的存根,如记录：

// This is called when the connection with the service has been
 // established, giving us the service object we can use to
 // interact with the service.  We are communicating with our
 // service through an IDL interface, so get a client-side
 // representation of that from the raw service object.
 mService = IRemoteService.Stub.asInterface(service);

iservice引用来自onServiceConnected方法,该方法在将服务绑定到您的活动之后调用.调用bindService传递ServiceConnection,它实现onServiceConnected方法.

当您的服务实现是本地的时,您不需要“IRemoteService.Stub.asInterface(service)”,那么您可以将服务转发给您本地服务.

本地服务示例在服务中执行此操作：

public class LocalService extends Service {
    private NotificationManager mNM;

    // Unique Identification Number for the Notification.
    // We use it on Notification start, and to cancel it.
    private int NOTIFICATION = R.string.local_service_started;

    /**
     * Class for clients to access.  Because we know this service always
     * runs in the same process as its clients, we don't need to deal with
     * IPC.
     */
    public class LocalBinder extends Binder {
        LocalService getService() {
        return LocalService.this;
        }
    }

    ...

}

这在ServiceConnection类的Activity中：

private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
        // This is called when the connection with the service has been
        // established, giving us the service object we can use to
        // interact with the service.  Because we have bound to a explicit
        // service that we know is running in our own process, we can
        // cast its IBinder to a concrete class and directly access it.
        mBoundService = ((LocalService.LocalBinder)service).getService();

        // Tell the user about this for our demo.
        Toast.makeText(Binding.this, R.string.local_service_connected,
                Toast.LENGTH_SHORT).show();
    }

    public void onServiceDisconnected(ComponentName className) {
        // This is called when the connection with the service has been
        // unexpectedly disconnected -- that is, its process crashed.
        // Because it is running in our same process, we should never
        // see this happen.
        mBoundService = null;
        Toast.makeText(Binding.this, R.string.local_service_disconnected,
            Toast.LENGTH_SHORT).show();
    }
};