编译时出现stripped of unavailable superclass

frameworks/base/core/java/android/app/AudioFocuseManager.java:6:  
error 111: Public class android.app.AudioFocuseManager stripped of unavailable superclass android.app.IAudioFocuseManager.Stub

     如此类错误,请检查是否使用了@hide导致, 以下两段aidl中的代码

      package android.app;

interface IAudioFocuseManager {
    void shouldAudioFocused(String pkg);
}

-------------------------------------------------

package android.app;

/** {@hide} */
interface IAudioFocuseManager {

    void shouldAudioFocused(String pkg);
} 

/** {@hide} */ 这个注释本以为是没用的, 后面才发现对应java的代码应该为:

 

      package android.app;

import android.os.RemoteException;
import android.app.IAudioFocuseManager.Stub;
public class AudioFocuseManager extends IAudioFocuseManager.Stub{
     @Override
     public void shouldAudioFocused(String pkg) throws RemoteException{
    
     }
}
-----------------------------------------------
package android.app;

import android.os.RemoteException;
import android.app.IAudioFocuseManager.Stub;

/**
* @hide
*/
public class AudioFocuseManager extends IAudioFocuseManager.Stub{
     @Override
     public void shouldAudioFocused(String pkg) throws RemoteException{
    
     }
}