歌曲列表是靠ListView实现的,在这里我给每首歌曲定义了一个类,并自定义了一个ArrayAdapter
添加Song类
Song类中包含了 标题 专辑 专辑图片信息等
1 public class Song {
2 String title;
3 String artist;
4 String album;
5 String Data;
6 String albumn_art;
7
8 public Song(String title, String artist, String album) {
9 this.title = title;
10 this.artist = artist;
11 this.album = album;
12 }
13 public Song(){
14
15 }
16
17 public String getAlbumn_art() {
18 return albumn_art;
19 }
20
21 public void setAlbumn_art(String albumn_art) {
22 this.albumn_art = albumn_art;
23 }
24
25 public String getData() {
26 return Data;
27 }
28
29 public void setData(String data) {
30 Data = data;
31 }
32
33 public String getTitle() {
34 return title;
35 }
36
37 public void setTitle(String title) {
38 this.title = title;
39 }
40
41 public String getArtist() {
42 return artist;
43 }
44
45 public void setArtist(String artist) {
46 this.artist = artist;
47 }
48
49 public String getAlbum() {
50 return album;
51 }
52
53 public void setAlbum(String album) {
54 this.album = album;
55 }
56 }
用于显示歌曲列表每一项的布局文件
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:orientation="horizontal" 4 android:layout_width="match_parent" 5 android:layout_marginRight="10dp" 6 android:layout_height="60dp"> 7 <!-- 歌曲的序列号 --> 8 <TextView 9 android:id="@+id/song_sort" 10 android:layout_width="wrap_content" 11 android:minWidth="45dp" 12 android:maxWidth="45dp" 13 android:layout_height="60dp" 14 android:text="1" 15 android:maxLines="1" 16 android:layout_gravity="center" 17 android:gravity="center" 18 android:textSize="22dp" 19 android:layout_weight="1"/> 20 <LinearLayout 21 android:layout_width="0dp" 22 android:layout_height="60dp" 23 android:layout_weight="20" 24 android:orientation="vertical" 25 > 26 <!-- 标题 --> 27 <TextView 28 android:id="@+id/song_title" 29 android:layout_weight="5" 30 android:layout_width="wrap_content" 31 android:layout_height="0dp" 32 android:maxLines="1" 33 android:gravity="center_vertical" 34 android:textSize="30dp" 35 android:textColor="#333333" 36 android:text="heihei"/> 37 <!-- 专辑与歌手信息 --> 38 <TextView 39 android:id="@+id/song_info" 40 android:layout_weight="3" 41 android:gravity="center_vertical" 42 android:maxLines="1" 43 android:layout_gravity="center_vertical" 44 android:layout_width="wrap_content" 45 android:layout_height="0dp" 46 android:textSize="14dp" 47 android:text="hahfdgdfhfghhfga"/> 48 49 </LinearLayout> 50 51 </LinearLayout>
SongAdapter
1 package com.example.agmcs.musicplayer;
2
3 import android.content.Context;
4 import android.content.Intent;
5 import android.view.LayoutInflater;
6 import android.view.View;
7 import android.view.ViewGroup;
8 import android.widget.ArrayAdapter;
9 import android.widget.TextView;
10
11 import org.w3c.dom.Text;
12
13 import java.util.List;
14
15
16 public class SongAdapter extends ArrayAdapter<Song> {
17 private int resId;
18
19 public SongAdapter(Context context, int resource, List<Song> objects) {
20 super(context, resource, objects);
21 this.resId = resource;
22 }
23
24 @Override
25 public View getView(int position, View convertView, ViewGroup parent) {
26 Song song = getItem(position);
27 View view;
28 ViewHolder holder;
29 if(convertView == null){
30 view = LayoutInflater.from(getContext()).inflate(resId,null);
31 holder = new ViewHolder();
32 holder.info = (TextView)view.findViewById(R.id.song_info);
33 holder.title = (TextView)view.findViewById(R.id.song_title);
34 holder.sort = (TextView)view.findViewById(R.id.song_sort);
35 view.setTag(holder);
36 }else{
37 view = convertView;
38 holder = (ViewHolder)view.getTag();
39 }
40 holder.title.setText(song.getTitle());
41 holder.info.setText(song.getArtist() + " - " + song.getAlbum());
42 holder.sort.setText(String.valueOf(position+1));
43 return view;
44 }
45
46 //优化ArrayAdapter
47 class ViewHolder{
48 TextView title;
49 TextView info;
50 TextView sort;
51 }
52 }
ListView的初始化
listview 是在Fragment中显示的
1 package com.example.agmcs.musicplayer;
2
3 import android.app.Activity;
4 import android.app.ListFragment;
5 import android.content.BroadcastReceiver;
6 import android.content.Context;
7 import android.content.Intent;
8 import android.content.IntentFilter;
9 import android.net.Uri;
10 import android.os.Bundle;
11 import android.app.Fragment;
12 import android.util.Log;
13 import android.view.LayoutInflater;
14 import android.view.View;
15 import android.view.ViewGroup;
16 import android.widget.AdapterView;
17 import android.widget.ListView;
18 import android.widget.Toast;
19
20 import java.util.ArrayList;
21 import java.util.List;
22
23
24 /**
25 * A simple {@link Fragment} subclass.
26 * Activities that contain this fragment must implement the
27 * {@link MusicListFrag.OnFragmentInteractionListener} interface
28 * to handle interaction events.
29 * Use the {@link MusicListFrag#newInstance} factory method to
30 * create an instance of this fragment.
31 */
32 public class MusicListFrag extends Fragment implements AdapterView.OnItemClickListener {
33 private ListView list;
34 private SongAdapter adapter;
35
36
37 @Override
38 public View onCreateView(LayoutInflater inflater, ViewGroup container,
39 Bundle savedInstanceState) {
40 // Inflate the layout for this fragment
41 View view = inflater.inflate(R.layout.fragment_music_list, container, false);
42
43 list = (ListView)view.findViewById(R.id.music_listview);
44 return view;
45 }
46
47 @Override
48 public void onActivityCreated(Bundle savedInstanceState) {
49 super.onActivityCreated(savedInstanceState);
50 adapter = new SongAdapter(getActivity(),R.layout.music_item,PlayerServer.songList);
51 list.setAdapter(adapter);
52 list.setOnItemClickListener(this);
53 }
54
55 @Override
56 public void onResume() {
57 super.onResume();
58 IntentFilter intentFilter = new IntentFilter(PlayerServer.updateBroadcast);
59 UpdateReceiver receiver = new UpdateReceiver();
60 getActivity().registerReceiver(receiver,intentFilter);
61 }
62
63 public class UpdateReceiver extends BroadcastReceiver{
64 @Override
65 //接受Service发出的刷新完毕广播后,刷新下Listview
66 //这里不能用adapter.notifyDateChange 因为songList完全是另一个内存
67 public void onReceive(Context context, Intent intent) {
68 adapter = new SongAdapter(getActivity(),R.layout.music_item,PlayerServer.songList);
69 list.setAdapter(adapter);
70 Log.d("hi","???");
71 }
72 }
73
74 @Override
75 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
76 //当点击时播放这首歌
77 Intent i = new Intent(getActivity(), PlayerServer.class);
78 i.putExtra("MSG",Constant.PlayerMsg.PLAY_MSG);
79 i.putExtra("position",position);
80 getActivity().startService(i);
81 }
82 }
时间： 2024-10-08 08:21:37