import android.media.VolumeProvider; //导入依赖的package包/类
public static Object createVolumeProvider(int volumeControl, int maxVolume, int currentVolume, final Delegate delegate) {
    return new VolumeProvider(volumeControl, maxVolume, currentVolume) {
        public void onSetVolumeTo(int volume) {
            delegate.onSetVolumeTo(volume);
        }

        public void onAdjustVolume(int direction) {
            delegate.onAdjustVolume(direction);
        }
    };
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
public static Object createVolumeProvider(int volumeControl, int maxVolume, int currentVolume,
        final Delegate delegate) {
    return new VolumeProvider(volumeControl, maxVolume, currentVolume) {
        @Override
        public void onSetVolumeTo(int volume) {
            delegate.onSetVolumeTo(volume);
        }

        @Override
        public void onAdjustVolume(int direction) {
            delegate.onAdjustVolume(direction);
        }
    };
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
public static void setCurrentVolume(Object volumeProviderObj, int currentVolume) {
    ((VolumeProvider) volumeProviderObj).setCurrentVolume(currentVolume);
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
public static void setPlaybackToRemote(Object sessionObj, Object volumeProviderObj) {
    ((MediaSession) sessionObj).setPlaybackToRemote((VolumeProvider) volumeProviderObj);
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
public static void setPlaybackToRemote(Object obj, Object obj1)
{
    ((MediaSession)obj).setPlaybackToRemote((VolumeProvider)obj1);
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
public static void setCurrentVolume(Object obj, int i)
{
    ((VolumeProvider)obj).setCurrentVolume(i);
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
public static void setPlaybackToRemote(Object sessionObj, Object volumeProviderObj) {
    ((MediaSession)sessionObj).setPlaybackToRemote((VolumeProvider)volumeProviderObj);
}
 

import android.media.VolumeProvider; //导入依赖的package包/类
@Override
public void setPlaybackToRemote(VolumeProviderCompat volumeProviderCompat) {
    mSession.setPlaybackToRemote((VolumeProvider)volumeProviderCompat.getVolumeProvider());
}