简单的播放内存卡中音乐的播放器

来源：互联网发布：台湾版淘宝官网编辑：程序博客网时间：2024/06/06 18:52

上篇文章提到了播放内存中的音乐，这次做的是播放内存中的播放器，只需要设置音源，播放准备，设置类型还有清单文件中的权限别忘了添加！

布局文件在贴一次

<SeekBar        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/seekBar"        android:layout_weight="1" />    <ImageButton        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/ib_main_imageButton"        android:src="@android:drawable/ic_media_play"/>

清单文件配置

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

MainActivity主要代码

public class MainActivity extends AppCompatActivity {    private SeekBar seekBar;    private ImageButton ib_main_imageButton;    private MediaPlayer mediaPlayer;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        seekBar = (SeekBar) findViewById(R.id.seekBar);        ib_main_imageButton = (ImageButton) findViewById(R.id.ib_main_imageButton);        seekBar.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();                mediaPlayer.seekTo(progress);            }        });        ib_main_imageButton.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if (mediaPlayer == null) {                    //实例化MediaPlayer                    //播放内存中的音乐                    //mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.music);                    //播放内存卡中的音乐                    mediaPlayer = new MediaPlayer();                    //设置音源                    try {                        mediaPlayer.setDataSource(getApplicationContext(), Uri.parse("file://mnt/sdcard/data/meng.mp3"));                    } catch (IOException e) {                        e.printStackTrace();                    }                    //这里要注意  需要准备一下                    try {                        mediaPlayer.prepare();                    } catch (IOException e) {                        e.printStackTrace();                    }                    //设置类型                    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);                    mediaPlayer.start();                    //把图标修改成暂停图标                    ib_main_imageButton.setImageResource(android.R.drawable.ic_media_pause);                    //获得音乐的时长                    int duration = mediaPlayer.getDuration();                    //给进度条设置最大的值                    seekBar.setMax(duration);                    new MyThread().start();                } else if (mediaPlayer.isPlaying()) {                    mediaPlayer.pause();                    //把图标修改成播放图标                    ib_main_imageButton.setImageResource(android.R.drawable.ic_media_play);                } else {                    mediaPlayer.start();                    //把图标修改成暂停图标                    ib_main_imageButton.setImageResource(android.R.drawable.ic_media_pause);                }            }        });    }    class MyThread extends Thread {        @Override        public void run() {            super.run();            while (seekBar.getProgress() <= seekBar.getMax()) {                //获取播放音乐的当前位置                int currentPosition = mediaPlayer.getCurrentPosition();                //让进度条动起来                seekBar.setProgress(currentPosition);            }        }    }}

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