android音乐播放器_专辑下歌曲列表

    点击专辑列表就进入了这个专辑下的歌曲列表。在这里也是用一个ListView作为显示的工具，当然也可以用其他的组件。

一、Activity 

/*** */
package com.android.musicplayer.activity;import java.io.File;
import com.android.musicplayer.adapter.MusicListAdapter;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnCreateContextMenuListener;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout.LayoutParams;/*** @author Administrator* */public class SongsOfAlbumActivity extends Activity {private int[] _ids;private String[] _titles;private String[] _artists;private String[] _path; // 音乐文件的路径private ListView listview;private int pos;private String albumName;private MusicListAdapter adapter;/* 上下文菜单项 */private static final int PLAY_ITEM = Menu.FIRST;private static final int DELETE_ITEM = Menu.FIRST + 1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Intent intent = this.getIntent();albumName = intent.getExtras().getString("albums");//获取被点击的专辑名，方便查询此专辑下的歌曲信息listview = new ListView(this);setListData();LinearLayout list = new LinearLayout(this);list.setBackgroundResource(R.drawable.listbg);LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);list.addView(listview, params);setContentView(list);}private void setListData() {Cursor c = this.getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,new String[] { MediaStore.Audio.Media.TITLE,MediaStore.Audio.Media.DURATION,MediaStore.Audio.Media.ARTIST,MediaStore.Audio.Media._ID,MediaStore.Audio.Media.DISPLAY_NAME,MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.ALBUM_ID, },MediaStore.Audio.Media.ALBUM + "='" + albumName + "'",null, null);c.moveToFirst();_ids = new int[c.getCount()];_titles = new String[c.getCount()];_path = new String[c.getCount()];_artists = new String[c.getCount()];for (int i = 0; i < c.getCount(); i++) {_ids[i] = c.getInt(3);_titles[i] = c.getString(0);_path[i] = c.getString(5);_artists[i] = c.getString(c.getColumnIndex(MediaStore.Audio.Media.ARTIST));c.moveToNext();}adapter = new MusicListAdapter(this, c);listview.setAdapter(adapter);}
}

    理解之前的歌曲列表，这里就比较简单了。只要获取了专辑的信息，albumName = intent.getExtras().getString("albums");再用Cursor c = this.getContentResolver().query()进行查询就可以获取这个专辑下的歌曲信息，然后再显示出来就ok了。

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