Android Open Source - DroidDoesMusic Playlist

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License

The source code is released under:
Copyright (C) 2011 by Michael Rose, Nick Hansen, Joe Zeimen Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Soft...
If you think the Android project DroidDoesMusic listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.uid.DroidDoesMusic.UI;
// w ww. j  a  va 2 s.  com
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.provider.MediaStore.Audio;
import android.util.Log;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.Adapter;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.AdapterContextMenuInfo;

import com.uid.DroidDoesMusic.R;
import com.uid.DroidDoesMusic.util.PlaylistManager;

/**
 * This class extends List Activity to show what playlists are on the device.
 * 
 * @author jzeimen
 *
 */
public class Playlist extends ListActivity {
  protected static final String TAG = "DroidDoesMusic";
  Uri extContentPlaylists = MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;
  private String playlistName = new String();
  
  private int playlistId;
  private ListAdapter mAdapter;
    /** Called when the activity is first created. */  
  @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, getClass().getSimpleName() + ": onCreate");
        super.onCreate(savedInstanceState);
        
        mAdapter = PlaylistManager.getInstance(this).listPlaylists();
         this.setListAdapter(mAdapter);
         registerForContextMenu(getListView());
  }
  
  @Override
  protected void onResume(){
    super.onResume();
    registerReceiver(addPlaylistReceiver, new IntentFilter(Main.ADDPLAYLIST));
  }
  
  
  
  @Override
  public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    MenuInflater mf = getMenuInflater();
    mf.inflate(R.menu.playlist_context, menu);
  }

  
  @Override
  public boolean onContextItemSelected(MenuItem menuitem) {
    AdapterContextMenuInfo info = (AdapterContextMenuInfo)menuitem.getMenuInfo();
    
    switch (menuitem.getItemId()){
    case R.id.delete_playlist:
      PlaylistManager pm = PlaylistManager.getInstance(this);
      pm.deletePlaylist(info.position);
      break;
    }
    return true;
  }
  
  @Override
  protected
  void onPause(){
    super.onPause();
    this.unregisterReceiver(addPlaylistReceiver);
  }
  
  
  /**
   * broadcast reciver used to call add playlist
   */
  private BroadcastReceiver addPlaylistReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context content, Intent intent) {
      addPlaylist();
      
    }
  };
  
  
  
  @Override
  public void onListItemClick(ListView l, View v, int position, long id) {
    Log.d(TAG, getClass().getSimpleName() + ": onListItemClick: (" + id + ")");
    super.onListItemClick(l, v, position, id);
      
    
    Log.d(TAG,"Position: "+position);
    Cursor c = (Cursor)mAdapter.getItem(position);
    Log.d(TAG,"Cursor to string:"+c.toString());
    playlistId = c.getInt(c.getColumnIndex(MediaStore.Audio.Playlists._ID));
    Log.d(TAG,"Column Index: "+c.getColumnIndex(MediaStore.Audio.Playlists._ID));
    Log.d(TAG,"Playlistid: "+playlistId);
    Intent i = new Intent(this,PlaylistSongView.class);
    i.putExtra(PlaylistSongView.INTENT_ITEM_PLAYLIST_NAME,(String)v.getTag(android.R.id.text1));
    i.putExtra(PlaylistSongView.INTENT_ITEM_PLAYLIST_ID, playlistId);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

    startActivity(i);
    
  }
  
  public void addPlaylist(){
    final PlaylistManager pm = PlaylistManager.getInstance(this);
    AlertDialog.Builder alert = new AlertDialog.Builder(this);
    final EditText input = new EditText(this);
    alert.setView(input);
    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int whichButton) {
        String value = input.getText().toString().trim();
        if(value != null && value.length()>0)
        pm.createPlaylist(value);
        //Toast.makeText(getApplicationContext(), value,Toast.LENGTH_SHORT).show();
      }
    });
    
    alert.setNegativeButton("Cancel",
        new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int whichButton) {
            dialog.cancel();
          }
        });
    alert.setMessage("Add a playlist");
    alert.show();
    
  }
  
  
}


/*************Some Useful code I found on the web*****************
final String [] STAR= {"*"};
Log.i(TAG, "All the titles");
Uri allaudio_uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor ca= managedQuery(allaudio_uri, STAR, null,null,null);
for(ca.moveToFirst(); !ca.isAfterLast(); ca.moveToNext()){
    if(ca.isFirst()){   // print all the fields of the first song
        for(int k= 0; k<ca.getColumnCount(); k++)
            Log.i(TAG, "  "+ca.getColumnName(k)+"="+ca.getString(k));
    }else{              // but just the titles of the res
        Log.i(TAG, ca.getString(ca.getColumnIndex("title")));
    }
}
Log.i(TAG, "--------------------------");
Log.i(TAG, "All the playlists");
Uri playlist_uri= MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;    
Cursor cursor= managedQuery(playlist_uri, STAR, null,null,null);
cursor.moveToFirst();
for(int r= 0; r<cursor.getCount(); r++, cursor.moveToNext()){
    Log.i(TAG, "-----");
    Log.i(TAG, "Playlist " + cursor.getString(cursor.getColumnIndex("name")));
    for(int k= 0; k<cursor.getColumnCount(); k++)           
        Log.i(TAG, cursor.getColumnName(k)+"="+cursor.getString(k));

    // the members of this playlist
    int id= cursor.getInt(0);
    Uri membersUri = MediaStore.Audio.Playlists.Members.getContentUri("external", id);
    Cursor membersCursor = managedQuery(membersUri, STAR, null, null, null);
    membersCursor.moveToFirst();
    for(int s= 0; s<membersCursor.getCount(); s++, membersCursor.moveToNext())
        Log.i(TAG, "  "+membersCursor.getString(membersCursor.getColumnIndex("title")));
    membersCursor.close();
}
cursor.close();
/*******************************************************/
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