Android音频播放器出现问题：搜寻栏无法转到位置设置

如何解决Android音频播放器出现问题：搜寻栏无法转到位置设置

| 我想使用seekbar将视频搜索到垂直位置 我已经尝试过了，但是seekbar不能正常工作，是说我改变了位置，但是视频却没有找到该位置。我做错了什么？ 我的代码如下：

package android.com.mp3play;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.URLUtil;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.SeekBar;
import android.widget.Toast;
import android.widget.VideoView;

import android.media.MediaPlayer;

import android.os.Environment;
import android.os.Handler;

import android.media.MediaPlayer.OnPreparedListener;
import android.view.MotionEvent;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.MediaController.MediaPlayerControl;
import android.widget.SeekBar.OnSeekBarChangeListener;




public class mp3playActivity extends Activity{
    private static final String TAG = \"VideoViewDemo\";

    private VideoView mVideoView;
    private EditText mPath;
    private ImageButton mPlay;
    private ImageButton mPause;
    private ImageButton mReset;
    private ImageButton mStop;
    private String current;
    private SeekBar sb;
//implements OnPreparedListener,MediaPlayerControl {




    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        sb=(SeekBar) findViewById(R.id.seekBar1);
        mVideoView = (VideoView) findViewById(R.id.surface_view);

        mPath = (EditText) findViewById(R.id.path);
        mPath.setText(\"http://daily3gp.com/vids/747.3gp\");

        mPlay = (ImageButton) findViewById(R.id.play);
        mPause = (ImageButton) findViewById(R.id.pause);
        mReset = (ImageButton) findViewById(R.id.reset);
        mStop = (ImageButton) findViewById(R.id.stop);

        mPlay.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                playVideo();
            }
        });
        mPause.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                if (mVideoView != null) {
                    mVideoView.pause();
                }
            }
        });
        mReset.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                if (mVideoView != null) {
                    mVideoView.seekTo(0);
                }
            }
        });
        mStop.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                if (mVideoView != null) {
                    current = null;
                    mVideoView.stopPlayback();
                }
            }
        });
        runOnUiThread(new Runnable(){
            public void run() {
                playVideo();

            }

        });
        sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onStartTrackingTouch(SeekBar arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onProgressChanged(SeekBar arg0,int arg1,boolean arg2) {
                // TODO Auto-generated method stub
                arg1=mVideoView.getCurrentPosition();
                mVideoView.seekTo(arg1);

            }
        });
    }

    private void playVideo() {
        try {
            final String path = mPath.getText().toString();
            Log.v(TAG,\"path: \" + path);
            if (path == null || path.length() == 0) {
                Toast.makeText(mp3playActivity.this,\"File URL/path is empty\",Toast.LENGTH_LONG).show();

            } else {
                // If the path has not changed,just start the media player
                if (path.equals(current) && mVideoView != null) {
                    mVideoView.start();
                    mVideoView.requestFocus();
                    return;
                }
                current = path;
                mVideoView.setVideoPath(getDataSource(path));
                mVideoView.start();
                mVideoView.requestFocus();

            }
        } catch (Exception e) {
            Log.e(TAG,\"error: \" + e.getMessage(),e);
            if (mVideoView != null) {
                mVideoView.stopPlayback();
            }
        }
    }

    private String getDataSource(String path) throws IOException {
        if (!URLUtil.isNetworkUrl(path)) {
            return path;
        } else {
            URL url = new URL(path);
            URLConnection cn = url.openConnection();
            cn.connect();
            InputStream stream = cn.getInputStream();
            if (stream == null)
                throw new RuntimeException(\"stream is null\");
            File temp = File.createTempFile(\"mediaplayertmp\",\"dat\");
            temp.deleteOnExit();
            String tempPath = temp.getAbsolutePath();
            FileOutputStream out = new FileOutputStream(temp);
            byte buf[] = new byte[128];
            do {
                int numread = stream.read(buf);
                if (numread <= 0)
                    break;
                out.write(buf,numread);
            } while (true);
            try {
                stream.close();
            } catch (IOException ex) {
                Log.e(TAG,\"error: \" + ex.getMessage(),ex);
            }
            return tempPath;
        }
      }
    }

    

解决方法

        通过理解您的代码，您实际上并没有寻求其他位置，而是停留在当前的演奏位置。

mVideoView.getCurrentPosition()+5;