标签：roi 输出 res item dia .so int tst iap
1.实现的功能
1.音乐播放器的前一首，下一首，暂停，播放功能。
2.从sd卡中搜索所有音乐文件，并且筛选出时长大于1分钟的音乐，输出音乐名称，时长，音乐作者（音乐所在的绝对地址）
3.使用了进度条显示实时播放的时间。
public void onClick(View view) { if (view.getId()==R.id.mPreviousBtn){ changeMusic(--mCurrentPosition); }else if (view.getId()==R.id.mPlayBtn){ if (mediaPlayer==null){ changeMusic(0); }else { if (mediaPlayer.isPlaying()){ mediaPlayer.pause(); }else { mediaPlayer.start(); } } }else if (view.getId()==R.id.mNextBtn){ changeMusic(++mCurrentPosition);
2.切歌
private void changeMusic(int position){ if (position<0){ mCurrentPosition = position =list.size()-1; }else if (position>list.size()-1){ mCurrentPosition = position=0; } if (mediaPlayer==null){ mediaPlayer=new MediaPlayer(); } try { mediaPlayer.reset(); mediaPlayer.setDataSource(list.get(position).path); mediaPlayer.prepare(); mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); } mSeekBar.setProgress(0); mSeekBar.setMax(mediaPlayer.getDuration()); mTotalTimeTv.setText(parseTime(mediaPlayer.getDuration())); updateProgress(); }
3.列表显示
private void initView() { mListView = (ListView) findViewById(R.id.main_listview); list = new ArrayList<>(); list = MusicUtils.getMusicData(this); adapter = new Adapter(this,list); mListView.setAdapter(adapter); mediaPlayer.setOnCompletionListener(this); mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { String path = list.get(i).path; Log.i("WDD",path); mCurrentPosition=i; changeMusic(mCurrentPosition); play(list.get(i).path); String singer = list.get(i).singer;//歌手 String song = list.get(i).song;//歌曲名称 int duration = list.get(i).duration;//歌曲长度 String time = MusicUtils.formatTime(duration); String s=singer+"\n"+song+"\n"+time; AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this); builder.setTitle("歌曲"); builder.setMessage(s); builder.show(); } }); } /** * 播放音频的方法 */ private void play(String path) { //播放之前要先把音频文件重置 try { mediaPlayer.reset(); //调用方法传进去要播放的音频路径 mediaPlayer.setDataSource(path); //异步准备音频资源 mediaPlayer.prepareAsync(); //调用mediaPlayer的监听方法，音频准备完毕会响应此方法 mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mediaPlayer) { mediaPlayer.start();//开始音频 } }); } catch (IOException e) { e.printStackTrace(); } }
4.从sd卡中搜索到音乐后，输出音乐信息（歌曲的名字……）
while (cursor.moveToNext()) { Song song = new Song(); song.song = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME)); song.singer = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)); song.path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA)); song.duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION)); song.size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));
5.设置歌曲时间的格式
private String parseTime(int oldTime) {
SimpleDateFormat sdf = new SimpleDateFormat("mm:ss");// 时间格式
String newTime = sdf.format(new Date(oldTime));
return newTime;
}
6.进度条跟随播放时间移动
private Handler mHandler=new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message message) {
int progress = mediaPlayer.getCurrentPosition();
mSeekBar.setProgress(progress);
mCurrentTimeTv.setText(parseTime(progress));
updateProgress();
return true;
}
});
4.代码链接 https://git.coding.net/ahabbw/android.git
5.apk的下载地址 https://coding.net/u/ahabbw/p/android/attachment
标签：roi 输出 res item dia .so int tst iap
原文地址：https://www.cnblogs.com/liyih/p/10102740.html
