android 音乐播放器 绝对好用 完整代码

package com.alex.media; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.util.Iterator; import java.util.TreeMap; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.database.Cursor; import android.media.AudioManager; import android.media.MediaPlayer; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.provider.MediaStore; import android.view.GestureDetector; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ImageButton; import android.widget.SeekBar; import android.widget.TextView; import android.widget.SeekBar.OnSeekBarChangeListener; public class MusicActivity extends Activity { private int[] _ids; private int position; private String _titles[] = null; private Uri uri; private ImageButton playBtn = null;//播放、暂停 //private Button stopBtn = null;//停止 private ImageButton latestBtn = null;//上一首 private ImageButton nextBtn = null;//下一首 private ImageButton forwardBtn = null;//快进 private ImageButton rewindBtn = null;//快退 private TextView lrcText = null;//歌词文本 private TextView playtime = null;//已播放时间 private TextView durationTime = null;//歌曲时间 private SeekBar seekbar = null;//歌曲进度 private SeekBar soundBar = null;//音量调节 private Handler handler = null;//用于进度条 private Handler fHandler = null;//用于快进 private int currentPosition;//当前播放位置 private int duration; private DBHelper dbHelper = null; private TextView name = null; private GestureDetector gestureDetector; private TreeMap<Integer, LRCbean> lrc_map = new TreeMap<Integer, LRCbean>(); private Cursor myCur; private static final String MUSIC_CURRENT = "com.alex.currentTime"; private static final String MUSIC_DURATION = "com.alex.duration"; private static final String MUSIC_NEXT = "com.alex.next"; private static final String MUSIC_UPDATE = "com.alex.update"; private static final int MUSIC_PLAY = 1; private static final int MUSIC_PAUSE = 2; private static final int MUSIC_STOP = 3; private static final int PROGRESS_CHANGE = 4; private static final int MUSIC_REWIND = 5; private static final int MUSIC_FORWARD = 6; private static final int STATE_PLAY = 1; private static final int STATE_PAUSE = 2; private int flag; //关于音量的变量 private AudioManager mAudioManager = null; private int maxVolume;//最大音量 private int currentVolume;//当前音量 @Override protected void onCreate(Bundle savedInstanceState) { //调用父类oncreate方法，并创建界面 super.onCreate(savedInstanceState); setContentView(R.layout.main1); //从intent中取得传递来的数据 Intent intent = this.getIntent(); Bundle bundle = intent.getExtras(); _ids = bundle.getIntArray("_ids"); position = bundle.getInt("position"); _titles = bundle.getStringArray("_titles"); //初始化各个控件 lrcText = (TextView)findViewById(R.id.lrc); name = (TextView)findViewById(R.id.name); playtime = (TextView)findViewById(R.id.playtime);//已经播放的时间 durationTime = (TextView)findViewById(R.id.duration); //获取媒体音量 mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); maxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);//获得最大音量 currentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);//获得当前音量 //TODO 手势识别 gestureDetector=new GestureDetector(new ChangeGestureDetector(this)); //设置播放按钮 playBtn = (ImageButton)findViewById(R.id.playBtn); playBtn.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { //flag表示现在歌曲的播放状态 switch (flag) { case STATE_PLAY: pause(); break; case STATE_PAUSE: play(); break; } } }); seekbar = (SeekBar)findViewById(R.id.seekbar); seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { public void onStopTrackingTouch(SeekBar seekBar) { play(); } public void onStartTrackingTouch(SeekBar seekBar) { pause(); } public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { if (fromUser){ seekbar_change(progress); } } }); rewindBtn = (ImageButton)findViewById(R.id.rewindBtn); rewindBtn.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: pause(); rewind(); break; case MotionEvent.ACTION_UP: play(); break; } return true; } }); forwardBtn = (ImageButton)findViewById(R.id.forwardBtn); forwardBtn.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()){ case MotionEvent.ACTION_DOWN: pause(); forward(); break; case MotionEvent.ACTION_UP: play(); break; } return true; } }); latestBtn = (ImageButton)findViewById(R.id.latestBtn); latestBtn.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { latestOne(); } }); nextBtn = (ImageButton)findViewById(R.id.nextBtn); nextBtn.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { nextOne(); } }); } @Override protected void onStart() { super.onStart(); setup(); play(); } /** * 重新设置seekbar， name（TextView）， 告知Service重新为MediaPlayer设置新的资源 * */ private void loadClip(){ //seekbar指针指0 seekbar.setProgress(0); //int pos = _ids[position]; //重新设置歌曲名 name.setText(_titles[position]); //将要播放的歌曲的id position 发送给歌曲播放Service Intent intent = new Intent(); intent.putExtra("_ids", _ids); intent.putExtra("position", position); intent.setAction("com.alex.media.MUSIC_SERVICE"); startService(intent); } /** * 注册广播接收器 * */ private void init(){ IntentFilter filter = new IntentFilter(); filter.addAction(MUSIC_CURRENT); filter.addAction(MUSIC_DURATION); filter.addAction(MUSIC_NEXT); filter.addAction(MUSIC_UPDATE); registerReceiver(musicReceiver, filter); } private void setup(){ //获取歌词文件 refreshView(); // loadClip(); init(); } /** * 音乐播放 */ private void play(){ //开始播放，将flag的状态改变 flag = STATE_PLAY; //将播放按键的背景图片换为暂停图片 playBtn.setBackgroundResource(R.drawable.pause_selecor); //启动歌曲播放Service Intent intent = new Intent(); intent.setAction("com.alex.media.MUSIC_SERVICE"); intent.putExtra("op",MUSIC_PLAY); startService(intent); } /** * 音乐暂停 */ private void pause(){ flag = STATE_PAUSE; playBtn.setBackgroundResource(R.drawable.play_selecor); Intent intent = new Intent(); intent.setAction("com.alex.media.MUSIC_SERVICE"); intent.putExtra("op",MUSIC_PAUSE); startService(intent); } /** * 音乐停止 */ private void stop(){ unregisterReceiver(musicReceiver); Intent intent = new Intent(); intent.setAction("com.alex.media.MUSIC_SERVICE"); intent.putExtra("op", MUSIC_STOP); startService(intent); } /** * 用户拖动进度条 */ private void seekbar_change(int progress){ Intent intent = new Intent(); intent.setAction("com.alex.media.MUSIC_SERVICE"); intent.putExtra("op", PROGRESS_CHANGE); intent