Question

你好所有的开发者！

（此代码是带有搜索栏的媒体播放器）

以下代码正常工作，但我想点击搜索栏更改进度音乐，例如defalt musicplayer android

我能做什么？

什么添加到我的代码中？

public class DoaMatn1 extends Activity implements OnClickListener {
    MediaPlayer mp;
    ImageButton btndowndoa;
    ImageButton btnplaydoa;
    SeekBar seek_bar;
    Handler seekHandler = new Handler();
    private ProgressDialog pDialog;
    public static final int progress_bar_type = 0;
    private static String file_url = "http://upir.ir/files92be/9e6cbb43de76.mp3";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.doamatn);

        mp = MediaPlayer.create(this,Uri.fromFile(audioFile));
        btnplaydoa = (ImageButton) findViewById(R.id.btnplaydoa);
        btnplaydoa.setOnClickListener(this);
        btndowndoa = (ImageButton) findViewById(R.id.btndowndoa);
        btndowndoa.setOnClickListener(this);        
        getInit();
        seekUpdation();
    }

    Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
    File sdcard = Environment.getExternalStorageDirectory();
    File audioFile = new File(sdcard.getPath() + "/EBKH/basem-tavasol.mp3");

    public void getInit() {
        if(audioFile.exists())
        {
            seek_bar = (SeekBar) findViewById(R.id.sbdoa);
            seek_bar.setMax(mp.getDuration());
        }
    }

    @Override
    public void onClick(View v) {
        switch(v.getId())
        {
        case R.id.btnplaydoa :
            if(audioFile.exists())
            {

                    if(mp!=null)
                    {
                       if(mp.isPlaying())
                       {
                          mp.pause();
                          btnplaydoa.setImageResource(R.drawable.play);
                       }   
                       else
                       {
                         mp.start();
                          btnplaydoa.setImageResource(R.drawable.pause);
                       }
                    }
                }

            break;

        case R.id.btndowndoa :

            if(!new File(Environment.getExternalStorageDirectory().toString() + "/EBKH/basem-tavasol.mp3").exists())          
                 new DownloadFileFromURL().execute(file_url);


           break;   
        }
    }

    Runnable run = new Runnable() {

        @Override
        public void run() {
            seekUpdation();
        }
    };

    public void seekUpdation() {
        if(audioFile.exists())
        {
            seek_bar.setProgress(mp.getCurrentPosition());
            seekHandler.postDelayed(run, 1000);

        }
    }


    @Override
    public void onBackPressed() {
        if( mp != null && mp.isPlaying() ) {
            mp.stop();   
        }
        super.onBackPressed();
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case progress_bar_type:
            pDialog = new ProgressDialog(this);
            pDialog.setMessage("در حال دانلود،لطفا صبور باشید...");
            pDialog.setIndeterminate(false);
            pDialog.setMax(100);
            pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            pDialog.setCancelable(true);
            pDialog.show();
            return pDialog;
        default:
            return null;
        }
    }
    class DownloadFileFromURL extends AsyncTask<String, String, String> {

        /**
        * Before starting background thread
        * Show Progress Bar Dialog
        * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            showDialog(progress_bar_type);
        }

        /**
        * Downloading file in background thread
        * */
        @Override
        protected String doInBackground(String... f_url) {
            int count;
            try {
                URL url = new URL(f_url[0]);
                URLConnection conection = url.openConnection();
                conection.connect();
                // getting file length
                int lenghtOfFile = conection.getContentLength();

                // input stream to read file - with 8k buffer
                InputStream input = new BufferedInputStream(url.openStream(), 8192);

                // Output stream to write file
                OutputStream output = new FileOutputStream("/sdcard/EBKH/basem-tavasol.mp3");

                byte data[] = new byte[1024];

                long total = 0;

                while ((count = input.read(data)) != -1) {
                    total += count;
                    // publishing the progress....
                    // After this onProgressUpdate will be called
                    publishProgress(""+(int)((total*100)/lenghtOfFile));

                    // writing data to file
                    output.write(data, 0, count);
                }

                // flushing output
                output.flush();

                // closing streams
                output.close();
                input.close();

            } catch (Exception e) {
                Log.e("Error: ", e.getMessage());
            }

            return null;
        }

        /**
        * Updating progress bar
        * */
        protected void onProgressUpdate(String... progress) {
            // setting progress percentage
            pDialog.setProgress(Integer.parseInt(progress[0]));
        }

        /**
        * After completing background task
        * Dismiss the progress dialog
        * **/
        @Override
        protected void onPostExecute(String file_url) {
            // dismiss the dialog after the file was downloaded
            dismissDialog(progress_bar_type);
        }

    }
}

Answer 1

你必须在你的类中实现SeekBar.OnSeekBarChangeListener，然后像这个songProgressBar.setOnSeekBarChangeListener（this）一样设置监听器;而不是实现这些方法：

/ * /

@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch)
  {

  }

/**
 * When user starts moving the progress handler
 * */
@Override
public void onStartTrackingTouch(SeekBar seekBar)
  {
    // remove message Handler from updating progress bar
    handler.removeCallbacks(mUpdateTimeTask);
  }

/**
 * When user stops moving the progress hanlder
 * */
@Override
public void onStopTrackingTouch(SeekBar seekBar)
  {
    handler.removeCallbacks(mUpdateTimeTask);
    int totalDuration = mediaPlayer.getDuration();
    int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);

    // forward or backward to certain seconds
    mediaPlayer.seekTo(currentPosition);

    // update timer progress again
    updateProgressBar();
  }

这是一个完整工作的媒体播放器示例与搜索栏触摸侦听器和歌曲进度更新的链接：

http://www.androidhive.info/2012/03/android-building-audio-player-tutorial/

关于本教程，唯一不起作用的是从给定的文件路径中检索和过滤歌曲。不知怎的，我无法让它发挥作用。但我找到了另一种解决方案，即编写自己的FileFilter。但在你的情况下，你使用的URL是不重要的。

在android中单击seekbar时更改进度音乐

1 个答案: