作為android初學者，最近把瘋狂android講義和瘋狂Java講義看了一遍，看到書中介紹的知識點非常多，很難全部記住，為了更好的掌握基礎知識點，我將開發一個網絡音樂播放器-EasyMusic來鞏固下，也當作是練練手。感興趣的朋友可以看看，有設計不足的地方也歡迎指出。

開發之前首先介紹下該音樂播放器將要開發的功能（需求）：

1.本地音樂的加載和播放；

2.網絡音樂的搜索，試聽和下載；

3.音樂的斷點下載；

4.點擊播放圖標加載專輯圖片，點擊歌詞加載歌詞并滾動顯示（支持滑動歌詞改變音樂播放進度）；

5.支持基于popupWindow的彈出式菜單；

6.支持后臺任務欄顯示和控制。

該篇主要是貼上一些關鍵類的代碼以及音樂播放器的展示效果圖：
首先看下效果圖：
1>收藏音樂：

2>取消收藏：

然后主要代碼如下：

1.MainActivity.java

package com.sprd.easymusic;import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Locale; import java.util.Map;import com.sprd.easymusic.fragment.DownloadFragment; import com.sprd.easymusic.fragment.MusicListFragment; import com.sprd.easymusic.fragment.NetFragment; import com.sprd.easymusic.fragment.StoredSongFragment; import com.sprd.easymusic.mysql.MyDBHelper; import com.sprd.easymusic.service.PlayMusicService;import android.app.Activity; import android.app.Service; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.database.Cursor; import android.os.Bundle; import android.os.IBinder; import android.provider.MediaStore; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.DisplayMetrics; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast;public class MainActivity extends FragmentActivity implementsMusicListFragment.CallBack, StoredSongFragment.CallBack,View.OnClickListener {private String TAG = "MainActivity";private final int FRAGMENT_COUNT = 4;// dbMusic保存媒體庫中的所有音樂private ViewPager mViewPager;private SectionsPagerAdapter mSectionsPagerAdapter;private List<Map<String, Object>> allMusic = new ArrayList<>();private List<Map<String, Object>> storedMusic = new ArrayList<>();private Context mContext;private TextView fragmentTitle1, fragmentTitle2, fragmentTitle3,fragmentTitle4, titleBottomLine;private int screenWidth, bottomLineWidth;private PlayMusicService playService;private MyDBHelper myHelper;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mContext = this;myHelper = new MyDBHelper(mContext, "easyMusic.db3", null, 1);getAllMusicFromDb();getStoredMusic(storedMusic, myHelper);getBottomLineWidth();mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());mViewPager = (ViewPager) findViewById(R.id.pager);mViewPager.setAdapter(mSectionsPagerAdapter);fragmentTitle1 = (TextView) findViewById(R.id.fragment1);fragmentTitle1.setOnClickListener(this);fragmentTitle2 = (TextView) findViewById(R.id.fragment2);fragmentTitle2.setOnClickListener(this);fragmentTitle3 = (TextView) findViewById(R.id.fragment3);fragmentTitle3.setOnClickListener(this);fragmentTitle4 = (TextView) findViewById(R.id.fragment4);fragmentTitle4.setOnClickListener(this);titleBottomLine = (TextView) findViewById(R.id.fragmentTitle);bindToService();mViewPager.setOnPageChangeListener(new OnPageChangeListener() {public void onPageSelected(int position) {}public void onPageScrolled(int item, float percent, int offset) {titleBottomLine.setX(item * bottomLineWidth + offset/ FRAGMENT_COUNT);}public void onPageScrollStateChanged(int position) {}});}private void getBottomLineWidth() {DisplayMetrics dm = new DisplayMetrics();this.getWindowManager().getDefaultDisplay().getMetrics(dm);screenWidth = dm.widthPixels;bottomLineWidth = screenWidth / FRAGMENT_COUNT;}// 綁定服務時的ServiceConnection參數private ServiceConnection conn = new ServiceConnection() {// 綁定成功后該方法回調，并獲得服務端IBinder的引用public void onServiceConnected(ComponentName name, IBinder service) {// 通過獲得的IBinder獲取PlayMusicService的引用playService = ((PlayMusicService.MusicBinder) service).getService();Toast.makeText(mContext, "onServiceConnected", Toast.LENGTH_LONG).show();}@Overridepublic void onServiceDisconnected(ComponentName name) {Log.d(TAG, "onServiceDisconnected");}};// 綁定服務PlayMusicServiceprivate void bindToService() {bindService(new Intent(mContext,com.sprd.easymusic.service.PlayMusicService.class), conn,Service.BIND_AUTO_CREATE);}// 通過獲得的PlayMusicService引用調用播放音樂的方法，方法傳進去的參數為音樂urlprotected void playMusic(String url) {if (playService != null) {playService.play(url);}}// 從媒體庫中查詢音樂private void getAllMusicFromDb() {if (allMusic.size() > 0)allMusic.clear();Cursor musicCursor1 = this.getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null,null, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);// 從外部存儲獲取getMusic(musicCursor1);Cursor musicCursor2 = this.getContentResolver().query(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, null, null,null, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);// 從內部存儲獲取getMusic(musicCursor2);}// 檢查當前歌曲是否在收藏列表中，在收藏列表返回true，否則返回falseprotected boolean checkIfStored(String url) {for (Map<String, Object> map : storedMusic) {if (url.equals((String) map.get("url"))) {return true;}}return false;}// 獲取到的音樂以Map的形式存儲在dbMusic中private void getMusic(Cursor musicCursor) {while (musicCursor.moveToNext()) {Map<String, Object> item = new HashMap<String, Object>();long id = musicCursor.getLong(musicCursor.getColumnIndex(MediaStore.Audio.Media._ID));String title = musicCursor.getString(musicCursor.getColumnIndex(MediaStore.Audio.Media.TITLE));String artist = musicCursor.getString(musicCursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));if (artist != null && artist.equals("<unknown>")) {continue;}long duration = musicCursor.getLong(musicCursor.getColumnIndex(MediaStore.Audio.Media.DURATION));long size = musicCursor.getLong(musicCursor.getColumnIndex(MediaStore.Audio.Media.SIZE));String url = musicCursor.getString(musicCursor.getColumnIndex(MediaStore.Audio.Media.DATA));int isMusic = musicCursor.getInt(musicCursor.getColumnIndex(MediaStore.Audio.Media.IS_MUSIC));if (isMusic != 0) {item.put("id", id);item.put("title", title);item.put("artist", artist);item.put("duration", formatDuration(duration));item.put("size", size);item.put("url", url);Log.d("MainActivity", "MusicTitle = " + title);Log.d("MainActivity", "MusicArtist = " + artist);Log.d("MainActivity", "MusicUrl = " + url);allMusic.add(item);}}}// 將音樂時長轉換為00:00格式public static String formatDuration(long dur) {long totalSecond = dur / 1000;String minute = totalSecond / 60 + "";if (minute.length() < 2)minute = "0" + minute;String second = totalSecond % 60 + "";if (second.length() < 2)second = "0" + second;return minute + ":" + second;}// 從數據庫中查詢已收藏音樂private void getStoredMusic(List<Map<String, Object>> storedMusic,MyDBHelper myHelper) {if (storedMusic.size() > 0)storedMusic.clear();Cursor cursor = myHelper.getReadableDatabase().rawQuery("select * from stored_music", null);while (cursor.moveToNext()) {Map<String, Object> item = new HashMap<>();item.put("title", cursor.getString(1));item.put("artist", cursor.getString(2));item.put("duration", cursor.getString(3));item.put("url", cursor.getString(4));storedMusic.add(item);}}public class SectionsPagerAdapter extends FragmentPagerAdapter {public SectionsPagerAdapter(FragmentManager fm) {super(fm);}@Overridepublic Fragment getItem(int position) {Fragment fragment = null;switch (position) {case 0:fragment = new MusicListFragment();break;case 1:fragment = new StoredSongFragment();break;case 2:fragment = new NetFragment();break;case 3:fragment = new DownloadFragment();break;}return fragment;}@Overridepublic int getCount() {return FRAGMENT_COUNT;}@Overridepublic CharSequence getPageTitle(int position) {Locale l = Locale.getDefault();switch (position) {case 0:return getString(R.string.title_section1).toUpperCase(l);case 1:return getString(R.string.title_section2).toUpperCase(l);case 2:return getString(R.string.title_section3).toUpperCase(l);case 3:return getString(R.string.title_section4).toUpperCase(l);}return null;}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}@Overridepublic void onItemSelected(String url) {playMusic(url);}@Overridepublic List<Map<String, Object>> getAllMusic() {return allMusic;}@Overridepublic List<Map<String, Object>> getStoredMusic() {return storedMusic;}@Overridepublic void onClick(View v) {if (v == fragmentTitle1) {mViewPager.setCurrentItem(0);} else if (v == fragmentTitle2) {mViewPager.setCurrentItem(1);} else if (v == fragmentTitle3) {mViewPager.setCurrentItem(2);} else if (v == fragmentTitle4) {mViewPager.setCurrentItem(3);}} }

MainActivity主要負責管理整個音樂播放器應用，像數據庫查詢，服務啟動等都是該類負責。其布局為：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:id="@+id/LinearLayout1"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context="com.sprd.easymusic.MainActivity" ><LinearLayout android:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center"android:background="#18f" ><TextView android:id="@+id/fragment1"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_weight="1"android:gravity="center"android:text="@string/title_section1"/><TextView android:id="@+id/fragment2"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_weight="1"android:gravity="center"android:text="@string/title_section2"/><TextView android:id="@+id/fragment3"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_weight="1"android:gravity="center"android:text="@string/title_section3"/><TextView android:id="@+id/fragment4"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_weight="1"android:gravity="center"android:text="@string/title_section4"/></LinearLayout><LinearLayout android:layout_width="match_parent"android:layout_height="3dp"android:gravity="center" ><!-- 該textview作為紅線移動到當前fragment下 --><TextView android:id="@+id/fragmentTitle"android:layout_width="0dp"android:layout_height="match_parent"android:layout_weight="1"android:background="#f00" /><TextView android:id="@+id/textView6"android:layout_width="0dp"android:layout_height="match_parent"android:layout_weight="3" /></LinearLayout><android.support.v4.view.ViewPager xmlns:tools="http://schemas.android.com/tools"android:id="@+id/pager"android:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="20"android:alpha="0.8"android:background="#afeeee"tools:context=".MainActivity" ></android.support.v4.view.ViewPager></LinearLayout>

2.MusicListFragment.java

package com.sprd.easymusic.fragment;import java.util.ArrayList; import java.util.List; import java.util.Map;import com.sprd.easymusic.R; import com.sprd.easymusic.mysql.MyDBHelper; import com.sprd.easymusic.myview.RefreshableListView;import android.app.Activity; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.support.v4.app.Fragment; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast;public class MusicListFragment extends Fragment {private final String TAG = "MusicListFragment";private final String ACTION_REFRESH = "action.refreshmusicList";private List<Map<String, Object>> dbMusic = new ArrayList<>();private List<Map<String, Object>> storedMusic = new ArrayList<>();private ListView musicListView;private LayoutInflater inflater;private CallBack mCallBack;private Context mContext;private MyDBHelper myHelper;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Log.d(TAG, "onCreate");mContext = this.getActivity();myHelper = new MyDBHelper(mContext, "easyMusic.db3", null, 1);inflater = LayoutInflater.from(mContext);dbMusic = mCallBack.getAllMusic();storedMusic = mCallBack.getStoredMusic();}// NetFragment向外界展示的內容，返回值為viewpublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View view = inflater.inflate(R.layout.musiclist, container, false);musicListView = (ListView) view.findViewById(R.id.musicList);musicListView.setAdapter(musicListAdapter);musicListView.setOnItemClickListener(new OnItemClickListener() {public void onItemClick(AdapterView<?> parent, View view, int position, long id) {mCallBack.onItemSelected((String) dbMusic.get(position).get("url"));TextView title = (TextView) view.findViewWithTag("title");Toast.makeText(mContext,"title = " + title.getText().toString(),Toast.LENGTH_SHORT).show();}});return view;}// 音樂列表適配器private BaseAdapter musicListAdapter = new BaseAdapter() {@Overridepublic int getCount() {return dbMusic.size();}@Overridepublic Object getItem(int position) {return null;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {View view = convertView;Map<String, Object> item = dbMusic.get(position);if (convertView == null) {view = inflater.inflate(R.layout.musiclist_item, null);}final ImageView storeMusic = (ImageView) view.findViewById(R.id.love);if (checkIfStored((String) item.get("url"))) {storeMusic.setImageResource(android.R.drawable.btn_star_big_on);} else {storeMusic.setImageResource(android.R.drawable.btn_star_big_off);}storeMusic.setOnClickListener(new OnClickListener() {public void onClick(View v) {new MyAsyncTask(storeMusic, dbMusic.get(position)).execute();}});TextView musicTitle = (TextView) view.findViewById(R.id.musicTitle);musicTitle.setTag("title");TextView musicArtist = (TextView) view.findViewById(R.id.musicArtist);musicTitle.setText((String) item.get("title"));musicArtist.setText((String) item.get("artist"));return view;}};// 檢查當前歌曲是否在收藏列表中，在收藏列表返回true，否則返回falseprotected boolean checkIfStored(String url) {for (Map<String, Object> map : storedMusic) {if (url.equals((String) map.get("url"))) {return true;}}return false;}// 執行收藏或者取消收藏動作后刷新刷收藏音樂列表private void refreshStoredMusic(Map<String, Object> musicInfo) {int i = 0;for (; i < storedMusic.size(); i++) {Map<String, Object> map = storedMusic.get(i);String url = (String) map.get("url");if (url.equals((String) musicInfo.get("url"))) {Log.d(TAG, "remove index =" + i);storedMusic.remove(i);//musicListAdapter.notifyDataSetChanged();mContext.sendBroadcast(new Intent(ACTION_REFRESH));return;}}storedMusic.add(musicInfo);//發送廣播通知StoredSongFargment更新列表mContext.sendBroadcast(new Intent(ACTION_REFRESH));// 刷新收藏列表有兩種方法：1：重新查詢一次數據庫-調用getStoredMusic()，這種效率比較低；2：用上面的方法，直接從storedMusic中刪除或添加// 這里用第一種方法// getStoredMusic();// 通知適配器數據發生改變的方法來刷新列表，最好別用musicListView.setAdapter(adapter)這種方法，該方法會導致焦點重新回到首行//musicListAdapter.notifyDataSetChanged();}public void onAttach(Activity activity) {super.onAttach(activity);mCallBack = (CallBack) activity;}public void onDestroy() {super.onDestroy();}public interface CallBack {public void onItemSelected(String url);public List<Map<String, Object>> getAllMusic();public List<Map<String, Object>> getStoredMusic();}// 執行收藏音樂/取消收藏的異步任務private class MyAsyncTask extends AsyncTask<String, Void, Void> {private ImageView starView;private Map<String, Object> musicInfo;// 標記收藏，true表示收藏音樂成功，false表示取消收藏音樂private boolean storeSuccess;public MyAsyncTask(ImageView starView, Map<String, Object> musicInfo) {this.starView = starView;this.musicInfo = musicInfo;}protected void onPreExecute() {super.onPreExecute();}protected void onProgressUpdate(Void... values) {super.onProgressUpdate(values);}protected Void doInBackground(String... params) {Log.d(TAG, "doInBackground");Cursor cursor = myHelper.getReadableDatabase().rawQuery("select * from stored_music", null);while (cursor.moveToNext()) {String title = cursor.getString(1);String artist = cursor.getString(2);Log.d(TAG, "title = " + title + " artist = " + artist);Log.d(TAG,"musicInfo.title = " + (String) musicInfo.get("title")+ " musicInfo.artist = "+ (String) musicInfo.get("artist"));if (cursor.getString(4).equals((String) musicInfo.get("url"))) {// 已經收藏的音樂取消收藏并移出收藏音樂表格-stored_musicmyHelper.getReadableDatabase().execSQL("delete from stored_Music where title like ? and artist like ?",new String[] { title, artist });storeSuccess = false;return null;}}// 未收藏的音樂加入到收藏中myHelper.getReadableDatabase().execSQL("insert into stored_music values(null, ?, ?, ?, ?)",new Object[] { musicInfo.get("title"),musicInfo.get("artist"), musicInfo.get("duration"),musicInfo.get("url") });storeSuccess = true;return null;}protected void onPostExecute(Void result) {super.onPostExecute(result);if (storeSuccess) {starView.setImageResource(android.R.drawable.btn_star_big_on);refreshStoredMusic(musicInfo);Toast.makeText(mContext, "收藏成功", 100).show();} else {starView.setImageResource(android.R.drawable.btn_star_big_off);refreshStoredMusic(musicInfo);Toast.makeText(mContext, "取消收藏", 100).show();}}}}

MusicListFragment主要顯示本地音樂，并提供音樂的收藏和取消收藏操作（異步任務來完成該操作）。其布局文件為：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><ListView android:id="@+id/musicList"android:layout_width="match_parent"android:layout_height="wrap_content" ></ListView></LinearLayout>

ListView的每個item布局為：

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/RelativeLayout1"android:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center_vertical"android:orientation="horizontal"android:padding="5dp" ><ImageView android:id="@+id/musicTag"android:layout_width="50dp"android:layout_height="40dp"android:layout_alignParentLeft="true"android:layout_alignParentTop="true"android:layout_centerVertical="true"android:src="@drawable/music" /><TextView android:id="@+id/musicTitle"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_toRightOf="@id/musicTag"android:singleLine="true"android:ellipsize="marquee"android:marqueeRepeatLimit="marquee_forever"/><TextView android:id="@+id/musicArtist"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@+id/musicTitle"android:layout_toRightOf="@id/musicTag"android:text="TextView" /><ImageView android:id="@+id/love"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBaseline="@+id/musicTag"android:layout_alignParentRight="true"android:src="@android:drawable/btn_star_big_off"/></RelativeLayout>

3.StoredSongFragment.java

package com.sprd.easymusic.fragment;import java.util.ArrayList; import java.util.List; import java.util.Map;import com.sprd.easymusic.R; import com.sprd.easymusic.myview.RefreshableListView;import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.support.v4.app.Fragment; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import android.widget.AdapterView.OnItemClickListener;public class StoredSongFragment extends Fragment {private final String TAG = "StoredSongFragment";private final String ACTION_REFRESH = "action.refreshmusicList";private List<Map<String, Object>> storedMusic = new ArrayList<>();private ListView storedMusicList;private CallBack mCallBack;private LayoutInflater inflater;private Context mContext;public void onAttach(Activity activity) {super.onAttach(activity);mCallBack = (CallBack) activity;}public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mContext = this.getActivity();inflater = LayoutInflater.from(mContext);storedMusic = mCallBack.getStoredMusic();IntentFilter filter = new IntentFilter();filter.addAction(ACTION_REFRESH);mContext.registerReceiver(refreshMusicReceiver, filter);Log.d(TAG, "onCreate");}// StoredSongFragment向外界展示的內容，返回值為viewpublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View view = inflater.inflate(R.layout.storedmusiclist, container, false);storedMusicList = (ListView) view.findViewById(R.id.storedmusicList);storedMusicList.setAdapter(musicListAdapter);storedMusicList.setOnItemClickListener(new OnItemClickListener() {public void onItemClick(AdapterView<?> parent, View view, int position, long id) {mCallBack.onItemSelected((String) storedMusic.get(position).get("url"));TextView title = (TextView) view.findViewWithTag("title");Toast.makeText(mContext, "title = " + title.getText().toString(),Toast.LENGTH_SHORT).show();}});return view;}// 音樂列表適配器private BaseAdapter musicListAdapter = new BaseAdapter() {public int getCount() {return storedMusic.size();}public Object getItem(int position) {return null;}public long getItemId(int position) {return position;}public View getView(final int position, View convertView, ViewGroup parent) {View view = convertView;Map<String, Object> item = storedMusic.get(position);if (convertView == null) {view = inflater.inflate(R.layout.storedmusiclist_item, null);}TextView musicTitle = (TextView) view.findViewById(R.id.musicTitle);musicTitle.setTag("title");TextView musicArtist = (TextView) view.findViewById(R.id.musicArtist);musicTitle.setText((String) item.get("title"));musicArtist.setText((String) item.get("artist"));return view;}};public void onDestroy() {if (refreshMusicReceiver != null) mContext.unregisterReceiver(refreshMusicReceiver);super.onDestroy();}public interface CallBack {public void onItemSelected(String url);public List<Map<String, Object>> getStoredMusic();}//接收來自MusicListFragment的收藏或取消收藏音樂的廣播，并更新收藏列表private BroadcastReceiver refreshMusicReceiver = new BroadcastReceiver() {public void onReceive(Context context, Intent intent) {if (intent.getAction().equals(ACTION_REFRESH)) {musicListAdapter.notifyDataSetChanged();Toast.makeText(mContext, "刷新收藏列表成功！", 100).show();}}};}

StoredSongFragment主要顯示收藏的音樂，也提供播放監聽，其布局與MusicListragment幾乎一樣（區別在listview的item是否有收藏圖標），因此就不提供了，參考MusicListragment的布局即可。

音樂播放器已完成，下載地址：
Android音樂播放器

總結

以上是生活随笔為你收集整理的基于android的网络音乐播放器-播放音乐及收藏音乐的效果展示（四）的全部內容，希望文章能夠幫你解決所遇到的問題。

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