当我尝试将ServiceConnection子类化时，得到“这里没有预期的接口”

Question

我正在尝试进行首次服务。我获得的示例代码在创建服务的活动中将ServiceConnection创建为内部类。

我希望ServiceConnection在创建服务的活动类之外，以便其他actite可以创建该服务并使用相同的ServiceConnection类。

因此，我正在尝试对其进行子类化，以便将其创建在其自己的文件中。

public class CMYServiceConnection extends ServiceConnection {
                                    I GET ERROR HERE

Messenger mService = null;
boolean mBound;


public void onServiceConnected(ComponentName className, IBinder service) {
    // This is called when the connection with the service has been
    // established, giving us the object we can use to
    // interact with the service.  We are communicating with the
    // service using a Messenger, so here we get a client-side
    // representation of that from the raw IBinder object.
    mService = new Messenger(service);
    mBound = true;
}

public void onServiceDisconnected(ComponentName className) {
    // This is called when the connection with the service has been
    // unexpectedly disconnected -- that is, its process crashed.
    mService = null;
    mBound = false;
}

}

Answer 1

ServiceConnection 是一个接口，类不能扩展接口。

使用implements替代