实例介绍
【实例简介】简单音乐播放器，实现了播放器基本功能，使用service后台播放音乐，并使用异步线程加载音乐图片
【实例截图】
【核心代码】
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 | package com.music.activity;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.app.AlertDialog;import android.content.ContentResolver;import android.content.ContentUris;import android.content.ContentValues;import android.content.DialogInterface;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.MediaStore;import android.text.TextUtils;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.TextView;import android.widget.Toast;import com.music.R;import com.music.application.MyApplication;import com.music.bean.Album;import com.music.bean.Mp3;import com.music.service.MusicPlayService;import com.music.util.MusicUtils;public class MusicMainActivity extends Activity { private ListView listView; private Button btn_playlist, btn_allSongs, btn_singers, btn_albums; private TextView tv_newPlaylist; private SimpleAdapter adapter; boolean isReturePlaylist; private int type = -1; private List<Mp3> songs;// 歌曲集合 private List<String> singers;// 歌手集合 private List<String> al_playlist;// 播放列表集合 private List<Album> albums;// 专辑集合 private MusicPlayService mService; public static final int PLAYLIST = 1;//适配器加载的数据是歌曲列表 public static final int SONGS_LIST = 2;//适配器加载的数据是歌曲列表 public static final int ALL_SINGERS_LIST = 3;//适配器加载的数据是歌手列表 public static final int ALL_ALBUMS_LIST = 4;//适配器加载的数据是专辑列表 private MyApplication application; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.music_main_activity); application = (MyApplication) getApplication(); initView(); initListener(); } public void initView() { listView = (ListView) this.findViewById(R.id.listview); btn_playlist = (Button) this.findViewById(R.id.btn_playlist); btn_allSongs = (Button) this.findViewById(R.id.btn_allSongs); btn_singers = (Button) this.findViewById(R.id.btn_singers); btn_albums = (Button) this.findViewById(R.id.btn_albums); tv_newPlaylist = (TextView) this.findViewById(R.id.tv_newPlaylist); } public void initListener() { //新增列表 tv_newPlaylist.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { addplaylist(); } }); //列出所有列表 btn_playlist.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { tv_newPlaylist.setVisibility(View.VISIBLE); al_playlist = MusicUtils.PlaylistList(MusicMainActivity.this); List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < al_playlist.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", ""); map.put("songName", al_playlist.get(i)); map.put("singerName", ""); listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); type = PLAYLIST; listView.setAdapter(adapter); } }); //列出所有歌曲 btn_allSongs.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { tv_newPlaylist.setVisibility(View.GONE); songs = MusicUtils.getAllSongs(MusicMainActivity.this); List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < songs.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", songs.get(i).getSqlId()); map.put("songName", songs.get(i).getName()); if (songs.get(i).getSingerName().equals("<unknown>")) { map.put("singerName", "----"); } else { map.put("singerName", songs.get(i).getSingerName()); } listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); type = SONGS_LIST; listView.setAdapter(adapter); } }); //列出所有歌手 btn_singers.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { tv_newPlaylist.setVisibility(View.GONE); List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); singers = MusicUtils.MusicSingerList(MusicMainActivity.this); for (int i = 0; i < singers.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", ""); map.put("songName", singers.get(i)); map.put("singerName", ""); listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); type = ALL_SINGERS_LIST; listView.setAdapter(adapter); } }); //列出所有专辑 btn_albums.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { tv_newPlaylist.setVisibility(View.GONE); albums = MusicUtils.MusicAlbumList(MusicMainActivity.this); List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < albums.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", ""); map.put("songName", albums.get(i).getName()); map.put("singerName", ""); listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); type = ALL_ALBUMS_LIST; listView.setAdapter(adapter); } }); listView.setOnItemClickListener(new OnItemClickListener() { private List<Map<String, Object>> listItems; Intent it = new Intent(); @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { switch (type) { case PLAYLIST: isReturePlaylist = true; it.putExtra("position", position); it.setClass(MusicMainActivity.this, PlaylistSongActivity.class); startActivity(it); break; case SONGS_LIST: if(null == mService){ mService = application.getmService(); } mService.setCurrentListItme(position); mService.setSongs(songs); mService.playMusic(songs.get(position).getUrl()); it.setClass(MusicMainActivity.this, MusicPlayActivity.class); startActivity(it); break; case ALL_SINGERS_LIST: songs = MusicUtils.MusicMp3ListbySinger(MusicMainActivity.this, singers.get(position)); listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < songs.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", ""); map.put("songName", songs.get(i).getName()); map.put("singerName", ""); listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); type = SONGS_LIST; listView.setAdapter(adapter); break; case ALL_ALBUMS_LIST: songs = MusicUtils.MusicMp3ListbyAlbum(MusicMainActivity.this, albums.get(position).getName()); listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < songs.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", ""); map.put("songName", songs.get(i).getName()); map.put("singerName", ""); listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); type = SONGS_LIST; listView.setAdapter(adapter); break; } } }); } /** * 新建列表 */ public void addplaylist() { final EditText inputServer = new EditText(MusicMainActivity.this); AlertDialog.Builder builder = new AlertDialog.Builder(MusicMainActivity.this); builder.setTitle("Input Name").setIcon(android.R.drawable.ic_dialog_info).setView(inputServer).setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).setPositiveButton("Save", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { String name = inputServer.getText().toString().trim(); if (!TextUtils.isEmpty(name)) { ContentResolver resolver = getContentResolver(); int id = idForplaylist(name); Uri uri; if (id >= 0) { uri = ContentUris.withAppendedId(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, id); MusicUtils.clearPlaylist(MusicMainActivity.this, id); } else { ContentValues values = new ContentValues(1); values.put(MediaStore.Audio.Playlists.NAME, name); uri = resolver.insert(MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, values); } setResult(RESULT_OK, (new Intent()).setData(uri)); isReturePlaylist = true; Intent it = new Intent(); it.putExtra("playListName", name); it.putExtra("autoAddSong", true); it.setClass(MusicMainActivity.this, PlaylistSongActivity.class); startActivity(it); } else { Toast.makeText(getApplicationContext(), "Name cannot be empty", Toast.LENGTH_SHORT).show(); return; } } }); builder.create().show(); } /** * 通过列表名得到列表id */ private int idForplaylist(String name) { Cursor c = MusicUtils.query(this, MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI, new String[] { MediaStore.Audio.Playlists._ID }, MediaStore.Audio.Playlists.NAME "=?", new String[] { name }, MediaStore.Audio.Playlists.NAME); int id = -1; if (c != null) { c.moveToFirst(); if (!c.isAfterLast()) { id = c.getInt(0); } c.close(); } return id; } @Override protected void onResume() { super.onResume(); //这里要重新刷新列表，因为跳到列表歌曲界面时可能把这个列表删了， //所有再跳回来当然要刷新，另外新建列表再回来肯定要刷新的 if (isReturePlaylist) { al_playlist = MusicUtils.PlaylistList(MusicMainActivity.this); List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>(); for (int i = 0; i < al_playlist.size(); i ) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", al_playlist.get(i)); map.put("songName", ""); map.put("singerName", ""); listItems.add(map); } adapter = new SimpleAdapter(MusicMainActivity.this, listItems, R.layout.item4music_main_activity, new String[] { "id", "songName", "singerName" }, new int[] { R.id.tv_id, R.id.tv_songName, R.id.tv_singerName }); listView.setAdapter(adapter); isReturePlaylist = false; } }} |
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