把下面一行刪除

import ?android.media.session.MediaController

試試看

import ?android.widget.MediaController

package?com.imooc.videoplayer;

import?android.app.Activity;
import?android.media.session.MediaController;
import?android.net.Uri;
import?android.os.Bundle;
import?android.os.Environment;
import?android.view.Menu;
import?android.view.MenuItem;
import?android.widget.VideoView;

public?class?MainActivity?extends?Activity?{

	private?VideoView?videoView;
	
	@Override
	protected?void?onCreate(Bundle?savedInstanceState)?{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		videoView?=?(VideoView)?findViewById(R.id.videoView);
		String?path?=?Environment.getExternalStorageDirectory().getAbsolutePath()+"";		/**
		
		?*?本地視頻播放
		?*/
		videoView.setVideoPath(path);
		
		/**
		?*?網絡視頻播放
		?*/
		//videoView.setVideoURI(Uri.parse(""));
		
		/**
		?*?使用MediaController控制視頻播放
		?*/
		android.widget.MediaController?controller?=?new?MediaController(this);
		
		/**
		?*?設置VideoView與MediaController建立關聯
		?*/
		videoView.setMediaController(controller);
		
		/**
		?*?設置MediaController與VideoView建立關聯
		?*/
		controller.setMediaPlayer(videoView);
	}
	
}

Type mismatch: cannot convert from android.media.session.MediaController to android.widget.MediaController

是版本不對嗎，還是什么情況，請高手賜教??！