Unable to loop the videos one by one

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Android

I had 21 videos in the internal folder, by using videocursor.getcount() it was able to count all the videos.and showing correct path for file.
but when i place "for loop" to play the all the videos.but it was eable to play the all the videos.it was only playing last video.
And it was not playing in the loop.

package com.example.videolist;

import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.VideoView;

public class VideoActivity extends Activity {
      private Cursor videocursor;
      private int video_column_index;
      ListView videolist;
      int count;
          String name = null;
       VideoView video_player_view;
    DisplayMetrics dm;
    SurfaceView sur_View;
    MediaController media_Controller;
    
       public class MediaFileInfo {

           private String fileName,filePath,fileType;

           public String getFileName() {
               return fileName;
           }

           public void setFileName(String fileName) {
               this.fileName = fileName;
           }

           public String getFilePath() {
               return filePath;
           }

           public void setFilePath(String filePath) {
               this.filePath = filePath;
           }

           public String getFileType() {
               return fileType;
           }

           public void setFileType(String fileType) {
               this.fileType = fileType;
           }
       }
       @Override
      public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
          System.gc();
       
            setContentView(R.layout.main);
            init_phone_video_grid();
      }

      private void init_phone_video_grid() {
            System.gc();
            String[] proj = { MediaStore.Video.Media._ID,
                    MediaStore.Video.Media.DATA,
                    MediaStore.Video.Media.DISPLAY_NAME,
                    MediaStore.Video.Media.SIZE };
                     videocursor = getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,proj,null, null, null);

          
            count = videocursor.getCount();
            Log.d("count:", String.valueOf(count));
            videolist = (ListView) findViewById(R.id.VideoList);
            videolist.setAdapter(new VideoAdapter(getApplicationContext()));
          
            Log.d("No of Video",""+count);




         for(int i=0; i< count; i++) {
               Log.d("i", String.valueOf(i));
               MediaFileInfo mediaFileInfo =new MediaFileInfo();
          video_column_index =videocursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME);
          videocursor.moveToPosition(i);
            // Log.d("getcolumn", String.valueOf(videocursor.moveToPosition(i)));
               name = videocursor.getString(video_column_index);
               mediaFileInfo.setFileName(name);
               Log.d("name",name);
               int column_index = videocursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
               Log.d("column_index", String.valueOf(column_index));
               videocursor.moveToPosition(i);

               String filepath = videocursor.getString(column_index);
             Log.d("last i", String.valueOf(i));
             Log.d("filepath",filepath);
               mediaFileInfo.setFilePath(filepath);
              video_player_view = (VideoView) findViewById(R.id.videoView);
              media_Controller = new MediaController(this);
              dm = new DisplayMetrics();
              this.getWindowManager().getDefaultDisplay().getMetrics(dm);
              int height = dm.heightPixels;
              int width = dm.widthPixels;
              video_player_view.setMinimumWidth(width);
              video_player_view.setMinimumHeight(height);

                  video_player_view.setMediaController(media_Controller);
              Log.d("last i", String.valueOf(i));
              Log.d("filepath",filepath);

         
                     for(i=0;i<videocursor.getCount();i++){
                         video_player_view.setVideoPath(filepath);
                    
                         video_player_view.requestFocus();
                         video_player_view.start();
            
             }

              video_player_view.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                  public void onCompletion(MediaPlayer player) {
                      Log.i("VideoView", "onCompletion()");
                      /
                      video_player_view.requestFocus();

                      video_player_view.start();
                  }

              });



          }

      }






      public class VideoAdapter extends BaseAdapter {
            private Context vContext;

                  public VideoAdapter(Context c) {
                        vContext = c;
            }

            public int getCount() {
                  return count;
            }

            public Object getItem(int position) {
                  return position;
            }

            public long getItemId(int position) {
                  return position;
            }
@Override
            public View getView(int position, View convertView, ViewGroup parent) {
                  System.gc();

                  TextView tv = new TextView(vContext.getApplicationContext());

                  String id = null;
                  if (convertView == null) {
                        video_column_index = videocursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME);
                        videocursor.moveToPosition(position);
                       id = videocursor.getString(video_column_index);
                       

                       tv.setText(id);

                  } else
                        tv = (TextView) convertView;
                 return tv;
            }
      }

}

What I have tried:

tired while and do while loop no use.