android 音频播放器 实例

主要用Android开了一个音频播放器，可以播放自己存储的歌曲！

package us.imnet.iceskysl;import java.util.ArrayList;import java.util.HashMap;import java.util.Hashtable;import java.util.Iterator;import java.util.List;import java.util.Map;import us.imnet.iceskysl.service.YPRService;import us.imnet.iceskysl.util.PreferencesUtil;import us.imnet.iceskysl.util.Tools;import us.imnet.iceskysl.xspf.Parser;import us.imnet.iceskysl.xspf.Playlist;import us.imnet.iceskysl.xspf.Track;import android.app.Activity;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.os.RemoteException;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class PlayListActivity extends Activity implements OnItemClickListener {public final String TAG = "main";// Identifiers for option menu itemsprivate static final int PLAY_NEXT = Menu.FIRST 1;private static final int PLAY_STOP = PLAY_NEXT 1;private static final int PLAY_PREV = PLAY_STOP 1;Playlist playlist = null;public String _id = "";public String _name = "";public String _type = "";public boolean is_valid = false;private YPRSInterface mpInterface;int player_position = 0;private String session = "";ListView itemlist = null;public String url = "";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.playlist);revParams();setTitle("Yobo: " _name);session = Tools.getSessionInPerence(this);itemlist = (ListView) findViewById(R.id.itemlist);fetch_datas();}private void fetch_datas() {// 1.构造需要的数据long timestamp = System.currentTimeMillis();String nonce = Tools.md5(String.valueOf(System.currentTimeMillis()) PreferencesUtil.api_secret);Hashtable<String, String> params = new Hashtable<String, String>();params.put("api_key", PreferencesUtil.api_key);params.put("nonce", nonce);params.put("timestamp", String.valueOf(timestamp));params.put("token", session);params.put("id", _id);// 2.对参数进行签名String api_sig = Tools.md5(Tools.sig_params(params) PreferencesUtil.api_secret);// 4.转换参数格式String params_str = Tools.paramsToString(params) "api_sig=" api_sig;//Parser parser = new Parser(url "?" params_str);try {parser.parse();playlist = parser.getPlaylist();this.bindService(new Intent(PlayListActivity.this, YPRService.class),mConnection, Context.BIND_AUTO_CREATE);} catch (Exception e) {e.printStackTrace();}}private List<Map<String, Object>> buildPlayListForSimpleAdapter() {try {mpInterface.clearPlaylist();if (playlist != null) {List songs = playlist.getTracks();Log.i("buildBoxListForSimpleAdapter", String.valueOf(songs.size()));List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(songs.size());Iterator<Map<String, Object>> l = songs.iterator();while (l.hasNext()) {Track track = (Track) l.next();mpInterface.addSongPlaylist(track.getLocation());Map<String, Object> map = new HashMap<String, Object>();Log.i("buildBoxListForSimpleAdapter", "name=" track.getTitle());map.put("name", track.getTitle());map.put("album", track.getAlbum());map.put("artist", track.getArtist());map.put("img", R.drawable.album_small);list.add(map);}return list;}} catch (RemoteException e) {Log.e(getString(R.string.app_name), e.getMessage());}return null;}// 接收传递进来的播放列表信息private void revParams() {Intent startingIntent = getIntent();if (startingIntent != null) {Bundle playlist = startingIntent.getBundleExtra("android.intent.extra.playlist");if (playlist == null) {is_valid = false;} else {_id = playlist.getString("id");_name = playlist.getString("name");_type = playlist.getString("type");is_valid = true;//if ("box".equalsIgnoreCase(_type)) {url = PreferencesUtil.baseUrl PreferencesUtil.boxes_playlist;} else {url = PreferencesUtil.baseUrl PreferencesUtil.station_playlist;}Log.i("url", url);}} else {is_valid = false;}}private ServiceConnection mConnection = new ServiceConnection() {public void onServiceConnected(ComponentName className, IBinder service) {mpInterface = YPRSInterface.Stub.asInterface((IBinder) service);updateSongList();}public void onServiceDisconnected(ComponentName className) {mpInterface = null;}};@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int position,long arg3) {Log.i("onListItemClick:", Integer.toString(position));try { Toast.makeText(PlayListActivity.this, R.string.remote_service_connected, Toast.LENGTH_SHORT).show();player_position = position;mpInterface.playFile(position);itemlist.setSelector(R.color.translucent_red);} catch (RemoteException e) {Log.e(getString(R.string.app_name), e.getMessage());}}// 更新歌曲列表Spublic void updateSongList() {List<Map<String, Object>> list = buildPlayListForSimpleAdapter();Log.i("refreshBoxListItems", "size=" String.valueOf(list.size()));SimpleAdapter playlist = new SimpleAdapter(this, list,R.layout.song_row, new String[] { "name", "album", "artist","img" }, new int[] { R.id.name, R.id.album,R.id.artist, R.id.img });// setListAdapter(boxes);itemlist.setAdapter(playlist);itemlist.setOnItemClickListener(this);itemlist.setSelection(0);}// 初始化菜单@Overridepublic boolean onCreateOptionsMenu(Menu menu) {super.onCreateOptionsMenu(menu);menu.add(0, PLAY_NEXT, 0, R.string.player_next).setIcon(R.drawable.player_fwd).setAlphabeticShortcut('N');menu.add(0, PLAY_PREV, 0, R.string.player_prev).setIcon(R.drawable.player_rew).setAlphabeticShortcut('P');menu.add(0, PLAY_STOP, 0, R.string.player_stop).setIcon(R.drawable.player_stop).setAlphabeticShortcut('S');return true;}// 当一个菜单被选中的时候调用@Overridepublic boolean onOptionsItemSelected(MenuItem item) {switch (item.getItemId()) {case PLAY_NEXT:try {mpInterface.skipForward();itemlist.setSelector(R.color.translucent_red);} catch (RemoteException e) {e.printStackTrace();}return true;case PLAY_PREV:try {mpInterface.skipBack();itemlist.setSelector(R.color.translucent_red);} catch (RemoteException e) {e.printStackTrace();}case PLAY_STOP:try {mpInterface.stop();} catch (RemoteException e) {e.printStackTrace();}}return true;} public void onDestroy() {Log.d(TAG, "onDestroy."); super.onDestroy(); unbindService(mConnection); }}