在我的视频应用中，当我点击播放按钮时，它没有播放视频

Question

当我点击播放按钮时，它没有播放视频。我是否需要对清单文件进行任何更改？当用户将手机从纵向模式旋转到横向模式时，如何更改视图？

public class MainActivity extends Activity implements OnClickListener{

    private static final String TAG="VideoPlayer";
    EditText videoPath;
    VideoView video;
    ImageButton play;
    ImageButton pause;
    ImageButton reset;
    ImageButton stop;
    String current;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        videoPath=(EditText)findViewById(R.id.path);
        videoPath.setText("G:\\Amar\\Messsssss\\Mobile Data\\a.mp4");
        video=(VideoView)findViewById(R.id.videoView);
        play=(ImageButton)findViewById(R.id.playButton);
        pause=(ImageButton)findViewById(R.id.pauseButton);
        reset=(ImageButton)findViewById(R.id.resetButton);
        stop=(ImageButton)findViewById(R.id.stopButton);
        play.setOnClickListener(this);
        pause.setOnClickListener(this);
        reset.setOnClickListener(this);
        stop.setOnClickListener(this);
        runOnUiThread(new Runnable(){
            public void run()
            {
                playVideo();
            }
        });
    }

    @Override
    public void onClick(View v) {
        int id=v.getId();
        switch(id)
        {
        case R.id.playButton:
                            playVideo();
                            break;
        case R.id.pauseButton:
                            if(video!=null)
                            video.pause();
                            break;
        case R.id.resetButton:
                            if(video!=null)
                            video.seekTo(0);
                            break;
        case R.id.stopButton:
                            if(video!=null)
                            current=null;
                            video.stopPlayback();
                            break;
        }

    }

    private void playVideo()
    {
        try
        {
        final String path=videoPath.getText().toString();
        Log.v(TAG,"Path: "+path);
        if(path==null ||path.length()==0)
        {
            Toast.makeText(MainActivity.this,"url/path is empty",Toast.LENGTH_LONG).show();
        }
        current=path;
        video.setVideoPath(pathSource(current));
        video.start();
        video.requestFocus();
        }
        catch(Exception e)
        {
            Log.e(TAG,"error:+ "+e.getMessage(),e);
            if(video!=null)
            {
                video.stopPlayback();
            }
        }
    }
    private String pathSource(String path)throws IOException
    {
        if(!URLUtil.isNetworkUrl(path)){
            return path;
        }
        else
        {
            URL url=new URL(path);
            URLConnection connection=url.openConnection();
            connection.connect();
            InputStream stream=connection.getInputStream();
            if(stream==null)
                throw new RuntimeException("Stream is empty");
            File temp=File.createTempFile("mediaPlayerTemp","data");
            temp.deleteOnExit();
            String tempPath=temp.getAbsolutePath();
            FileOutputStream fos=new FileOutputStream(temp);
            byte []buf=new byte[128];
            do {
                int numread = stream.read(buf);
                if (numread <= 0)
                    break;
                fos.write(buf, 0, numread);
            } while (true);
            try {
                stream.close();
            } catch (IOException ex) {
                Log.e(TAG, "error: " + ex.getMessage(), ex);
            }
            fos.close();
            return tempPath;
        }

        }