android实现简单音频播放器

1.从内存和内存卡中播放音频

public class MainActivity extends AppCompatActivity {
    private SeekBar sb_id;
    private MediaPlayer mediaPlayer;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sb_id = (SeekBar) findViewById(R.id.sb_id); //SeekBar

        //给进度条设置滑动的监听
        sb_id.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                int progress=seekBar.getProgress();
                //在当前位置播放
                mediaPlayer.seekTo(progress);
            }
        });

    }

    public void button(View view){
       final ImageButton imageButton= (ImageButton) view;
     if(mediaPlayer ==null){
         mediaPlayer = MediaPlayer.create(this, R.raw.sa);//播放内存音频
      /*
       // 播放内存卡中音频
       mediaPlayer=new MediaPlayer();
         //设置音频
         try {
             mediaPlayer.setDataSource(this, Uri.parse("file://手机存储/qqmusic/song/seve.mp3"));
            //准备
             mediaPlayer.prepare();
         } catch (IOException e) {
             e.printStackTrace();
         }*/

         mediaPlayer.start();  //播放停止
         //获取音乐的总时长
         int duration=mediaPlayer.getDuration();
         //将进度条设置最大值为：音乐的总时长
         sb_id.setMax(duration);
         imageButton.setImageResource(android.R.drawable.ic_media_pause);
     }else if(mediaPlayer.isPlaying()){
         mediaPlayer.pause();
         imageButton.setImageResource(android.R.drawable.ic_media_play);
     }else{
         mediaPlayer.start();
         imageButton.setImageResource(android.R.drawable.ic_media_pause);
     }
    }

    class MyThread extends Thread{
        @Override
        public void run() {
            super.run();
            while(sb_id.getProgress()<=sb_id.getMax()){
                //获取音乐当前播放的位置
                int position=mediaPlayer.getCurrentPosition();
                sb_id.setProgress(position);
            }
        }
    }

}

播放内存卡中音频需要的权限（AndroidManifest.xml中）

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />

2.下面是播放网络音频

public class MainAction01 extends AppCompatActivity {

    private SeekBar sb_id;
    private MediaPlayer mediaPlayer;


    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sb_id = (SeekBar) findViewById(R.id.sb_id);

        //给进度条设置滑动的监听
        sb_id.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                int progress=seekBar.getProgress();
                //在当前位置播放
                mediaPlayer.seekTo(progress);
            }
        });
    }

    public void button(View view){
        final ImageButton imageButton= (ImageButton) view;
        if(mediaPlayer==null){
            //播放内存中音频
            //mediaPlayer = MediaPlayer.create(this, R.raw.f);
            //播放内存卡中文件
            mediaPlayer=new MediaPlayer();
            try {
                mediaPlayer.setDataSource(this, Uri.parse("http://193.168.4.135/internet.mp3"));
                mediaPlayer.prepareAsync();
            } catch (IOException e) {
                e.printStackTrace();
            }
            //设置准备完成的监听
            mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mediaPlayer) {
                    //下载操作（复制）
                    mediaPlayer.start();
                    imageButton.setImageResource(android.R.drawable.ic_media_pause);
                    //获取音乐的总时长
                    int duration=mediaPlayer.getDuration();
                    //将进度条设置最大值为：音乐的总时长
                    sb_id.setMax(duration);

                    new MyThread().start();
                }
            });

        }else if(mediaPlayer.isPlaying()){
            mediaPlayer.pause();
            imageButton.setImageResource(android.R.drawable.ic_media_play);
        }else{
            mediaPlayer.start();
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
        }
    }

    class MyThread extends Thread{
        @Override
        public void run() {
            super.run();
            while(sb_id.getProgress()<=sb_id.getMax()){
                //获取音乐当前播放的位置
                int position=mediaPlayer.getCurrentPosition();
                sb_id.setProgress(position);
            }
        }
    }
}

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