android实现简单音频播放器

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" />

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);
}
}
}
}