Android Open Source - 5th Album Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

?package com.zhanglin.practice;
/*from  w w w . j av  a2 s  .co m*/
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
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.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class AlbumActivity extends Activity
{
  private ListView mListView;
  private MyAdapter mMyAdapter;
  private String[] albums;
  
  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.album);
    //setListData();
    setupViews();
  }
  public void setupViews()
  {
      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.ALBUM,
          MediaStore.Audio.Media._ID,
          MediaStore.Audio.Media.DISPLAY_NAME
      },
      null,null,MediaStore.Audio.Media.ALBUM);
      c.moveToFirst();
      int num=c.getCount();
      HashSet<String> set=new HashSet<String>();
      for(int i=0;i<num;i++)
      {
        set.add(c.getString(3));
        c.moveToNext();
      }
      num=set.size();
      Iterator<String> it=set.iterator();
      albums=new String[num];
      int i=0;
      while(it.hasNext())
      {
        albums[i]=it.next().toString();
        i++;
      }
      String album="";
      for(int j=0;j<num;j++)
      {
        if(j<num-1)
        {
          album=album+"'"+albums[j]+"',";
        }
        else
        {
          album=album+"'"+albums[j]+"'";
        }
      }

      Cursor c1=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.ALBUM,
          MediaStore.Audio.Media._ID,
          MediaStore.Audio.Media.DISPLAY_NAME,
      },
          null,null,MediaStore.Audio.Media.ALBUM);
      c1.moveToFirst();
      HashMap<String,String> map=new HashMap<String,String>();
      int num1=c1.getCount();
      for(int j=0;j<num1;j++)
      {
        map.put(c1.getString(3),c1.getString(2));
        c1.moveToNext();
      }
    mMyAdapter=new MyAdapter(this,albums,map);
    mListView=(ListView)findViewById(R.id.listview_album);
    mListView.setAdapter(mMyAdapter);
    mListView.setOnItemClickListener(new OnItemClickListener()
    {
      @Override
      public void onItemClick(AdapterView<?> arg0,View view,int position,long id)
      {
        Intent intent=new Intent();
        intent.setClass(AlbumActivity.this,alb.class);
        intent.putExtra("albums",albums[position]);
        startActivity(intent);
      }
    });
    
  }
  private class MyAdapter extends BaseAdapter
  {    
    private Context myCon;
    private String[] albums;
    private HashMap<String,String> myMap;

    public MyAdapter(Context con,String[] str1,HashMap<String,String> map)
    {
      myCon=con;
      albums=str1;
      myMap=map;
    }

    @Override
    public int getCount()
    {
      return albums.length;
    }

    @Override
    public Object getItem(int position)
    {
      return position;
    }

    @Override
    public long getItemId(int position)
    {

      return position;
    }

    @Override
    public View getView(int position,View convertView,ViewGroup parent)
    {
      convertView=LayoutInflater.from(myCon).inflate(R.layout.doublerowitem,null);
      /**
       * ???????
       */
      TextView album=(TextView)convertView.findViewById(R.id.doublerow_textView1);
      if(albums[position].length()>15)
      {
        album.setText(albums[position].substring(0,12)+"...");
      }
      else
      {
        album.setText(albums[position]);
      }
      /**
       * ?????????
       */
      TextView artist=(TextView)convertView.findViewById(R.id.doublerow_textView2);
      if(albums[position].equals("sdcard"))
      {
        artist.setText("?????");
      }
      else
      {
        artist.setText(myMap.get(albums[position]));
      }

      ImageView Albumsitem=(ImageView)convertView.findViewById(R.id.doublerow_image);
      Albumsitem.setImageResource(R.drawable.item);
      return convertView;
    }
  }
  @Override
  public boolean onCreateOptionsMenu(Menu menu)
  {
    // TODO Auto-generated method stub
    menu.add(0,1,Menu.NONE,"?????");
    menu.add(0,2,Menu.NONE,"????");
    menu.add(0,3,Menu.NONE,"??");
    menu.add(0,4,Menu.NONE,"??");
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item)
  {
    // TODO Auto-generated method stub
    switch(item.getItemId())
    {
    case 1:
      Intent intent1=new Intent(AlbumActivity.this,PlayListActivity.class);
      startActivity(intent1);
      break;
    case 2:
      Intent playing=new Intent();
      playing.setClass(AlbumActivity.this,PlayingActivity.class);
      startActivity(playing);
      break;
    case 3:
      Intent intent2=new Intent(AlbumActivity.this,About.class);
      startActivity(intent2);
      break;
    case 4:
      finish();
      break;
    default:
      break;
    }
    return true;
  }
}
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