安卓音乐播放器
程序代码当地音频文件的播放功能，表明播放音乐的信息内容，表明当地歌曲歌词，从互联网上获得歌曲歌词，摇一摇切歌，转换情况等作用！
1.要去完成音乐播放文档，由于程序流程关闭以后，音乐是不可以停用的，因此 要在主题活动中去关联服务项目，对音频文件的实际操作都是在服务项目中开展，
因此 第一步新创建工程项目以后将主题活动与新创建的服务项目关联，在这儿给服务项目取名为MusicService，
public class MusicService extends Service {
private ArrayList<MyMusic> data=new ArrayList<>();//用于储存全部的音频文件信息内容，MyMusic为案例类，一个MyMusic意味着一个音频文件
@Override
public IBinder onBind(Intent intent) {
return new LocalBinder();
}
@Override
public void unbindService(ServiceConnection conn) {
super.unbindService(conn);
}
public class LocalBinder extends Binder{
public MusicService getService(){
return MusicService.this;
}
/**
* 获得全部的音频文件,这一方式去得到安卓机里全部的影音文件，并储存在服务项目中
* @return
*/
private void getMusic(){
Cursor cursor = getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null,
null
);
for (int i = 0; i < cursor.getCount(); i ) {
cursor.moveToNext();
//获得文档id
Long id = cursor.getLong(
cursor.getColumnIndex(MediaStore.Audio.Media._ID));
//获得创作者
String author = cursor.getString(
cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
//获得题目
String title = cursor.getString(cursor.getColumnIndex
(MediaStore.Audio.Media.TITLE));
//获得途径，音乐播放情况下必须采用，不可或缺
String url = cursor.getString(cursor.getColumnIndex
(MediaStore.Audio.Media.DATA));
//获得播放视频時间
Long time = cursor.getLong(
cursor.getColumnIndex(MediaStore.Audio.Media.DURATION));
//获得尺寸
Long size = cursor.getLong(
cursor.getColumnIndex(MediaStore.Audio.Media.SIZE));
//是不是为歌曲
int isMusic = cursor.getInt(cursor
.getColumnIndex(MediaStore.Audio.Media.IS_MUSIC));
if (isMusic != 0&& time > 100000&&size>3500000) {
MyMusic myMusic = new MyMusic(url, title, author, size, time, id);
//将歌曲加上到ArrayList中ArrayList用于储存音频文件信息内容
data.add(myMusic);
}
}
cursor.close();
}
}
}
服务项目中那么写，仅仅第一步，事后也有大量的作用必须去加上，下面在主题活动去关联服务项目，获得服务项目中的歌曲数据信息
private MusicAdapter adapter;
private ArrayList<MyMusic> data=new ArrayList<>();
private ServiceConnection conn= new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
//关联服务项目后运行，还记得打括弧
musicService=((MusicService.LocalBinder)service).getService();
//获得数据信息
data=musicService.getData();
adapter = new MusicAdapter(ListActivity.this, data,height);
listView_music.setAdapter(adapter);
textview_title.setText(musicService.gettitle());
if(musicService.isRun()){
imageButton_pause.setImageDrawable(getResources().getDrawable(R.drawable.play));
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
musicService=null;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
height=getWindowManager().getDefaultDisplay().getHeight();
listView_music = (ListView) findViewById(R.id.listView);
seekBar = (SeekBar) findViewById(R.id.seekBar);
imageButton_pause = (ImageButton) findViewById(R.id.imageButton_pause);
imageButton_next = (ImageButton) findViewById(R.id.imageButton_next);
imageButton_special = (ImageButton) findViewById(R.id.imageButton_special);
textview_title = (TextView) findViewById(R.id.textView_title);
listView_left= (ListView) findViewById(R.id.draw_listview);
line_list= (LinearLayout) findViewById(R.id.line_list);
//复位按键
imageButton_special.setImageDrawable(getResources().getDrawable(R.drawable.special));
imageButton_pause.setImageDrawable(getResources().getDrawable(R.drawable.pause));
imageButton_next.setImageDrawable(getResources().getDrawable(R.drawable.next));
textview_title.setText(“”);
intent=new Intent(this,MusicService.class);
startService(intent);
bindService(intent, conn, BIND_AUTO_CREATE);
adpater_left=new Adpater_left(this);
listView_left.setAdapter(adpater_left);
listView_left.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0:
//视频在线观看
Intent intent_video=new Intent(ListActivity.this,VideoListActivity.class);
startActivity(intent_video);
break;
case 1:
break;
case 2:
Intent intent_set = new Intent(ListActivity.this, SetActivity.class);
startActivity(intent_set);
break;
case 3:
Intent intent_bg = new Intent(ListActivity.this, BG_Activity.class);
startActivity(intent_bg);
break;
case 4:
ListActivity.this.finish();
musicService.exit();
stopService(intent);
break;
}
}
});
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int px, px1, px2;
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
px1 = seekBar.getProgress();
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
px2 = seekBar.getProgress();
if (px1 == px2) {
musicService.seek(px2);
p = px2;
musicService.setProgress(p);
} else if (px – 500 < px1 && px1 < px1 500) {
musicService.seek(px2);
p = px2;
musicService.setProgress(p);
}
imageButton_pause.setImageDrawable(getResources().getDrawable(R.drawable.play));
}
});
listView_music.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//播放视频当今曲子
musicService.play(position);
seek();
musicService.startTimer();
textview_title.setText(musicService.gettitle());
imageButton_pause.setImageDrawable(getResources().getDrawable(R.drawable.play));
}
});
listView_music.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
registerForContextMenu(listView_music);
}
