在eclipse使用videoview控件达成播放视频的效果时候，视频显示can't play the video,新手求助，急！

Question

package com.example.admin.myapplication;

import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;

public class MainActivity extends AppCompatActivity {
    private VideoView video;
    MediaController mediaController;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        video= (VideoView) findViewById(R.id.videoView);
        mediaController = new MediaController(this);
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()
                +"/Free Loop";
                video.setVideoPath(path);
        video.setMediaController(mediaController);
        mediaController.setMediaPlayer(video);
    }

}