Android Open Source - RandomMusicPlayer Song List Adapter

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From Project

Back to project page RandomMusicPlayer.

License

The source code is released under:

Apache License

Java Source Code

package com.matthew.ahsam.phoenix.randommusicplayer;
/*from   w  w w  .java  2 s.  com*/
import java.util.ArrayList;

import android.content.Context;
import android.view.DragEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

public class SongListAdapter extends BaseExpandableListAdapter {

    private Context context;
    private ArrayList<SongListGroup> groups;
    
    public SongListAdapter (Context c, ArrayList<SongListGroup> g) {
      context = c;
      groups = g;
    }
    
    public Object getChild (int groupPosition, int childPosition) {
      ArrayList<SongListChild> childList = groups.get(groupPosition).getSongs();
      return childList.get(childPosition);
    }
    
    public String getNextSongPath (int groupPosition, int childPosition) {
      return ((SongListChild)getChild(groupPosition,childPosition)).getFullPath();
    }
    
    public long getChildId (int groupPosition, int childPosition) {
      return childPosition;
    }
    
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View view, ViewGroup parent) {
      
      if(view == null) {
        LayoutInflater infalInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = infalInflater.inflate(R.layout.songlist_child, null);
      }
      SongListChild child = (SongListChild) getChild(groupPosition,childPosition);
    
      if (!child.isSelected()) {
        view.setBackgroundColor(view.getResources().getColor(android.R.color.background_light));
      } else {
        view.setBackgroundColor(view.getResources().getColor(R.color.BlueTintBackground));
      }
      child.setPosition(childPosition);
      view.setTag(child);
      TextView tv = (TextView) view.findViewById(R.id.tvChild);
      tv.setText(child.getName().toString());
      return view;
    }
    
    public int getChildrenCount (int groupPosition) {
      if (groups.get(groupPosition).getSongs() != null ) {
          ArrayList<SongListChild> chList = groups.get(groupPosition).getSongs();
          return chList.size();
      }
      return 0;
    }
    
    public Object getGroup(int groupPosition) {
      return groups.get(groupPosition);
    }
    
    public int getGroupCount() {
      return groups.size();
    }
    
    public int getGroupPosition (SongListGroup slg) {
      for (int i=0; i < getGroupCount(); i++) {
        if (slg.equals(getGroup(i)))
          return i;
      }
      return -1;
    }
    
    public long getGroupId (int groupPosition) {
      return groupPosition;
    }
    
    public View getGroupView (int groupPosition, boolean isLastChild, View view, ViewGroup parent) {
      SongListGroup group = (SongListGroup) getGroup(groupPosition);
      if (view == null) {
        LayoutInflater inf = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inf.inflate(R.layout.songlist_group, null);
      }
      TextView tv = (TextView) view.findViewById(R.id.tvGroup);
      tv.setText (group.getName());
      view.setTag(groups.get(groupPosition));
      if (view != null) {
        view.setOnDragListener(new View.OnDragListener() {
          
          @Override
          public boolean onDrag(View v, DragEvent event) {
            switch (event.getAction()) {
            case DragEvent.ACTION_DRAG_STARTED:
              break;
            case DragEvent.ACTION_DRAG_ENTERED:
              v.setSelected(true);
              v.setBackgroundColor(v.getResources().getColor(R.color.BlueTintBackground));
              break;
            case DragEvent.ACTION_DRAG_LOCATION:
              break;
            case DragEvent.ACTION_DRAG_EXITED:
              v.setBackgroundColor(v.getResources().getColor(android.R.color.background_light));
              break;
            case DragEvent.ACTION_DROP:
              SongListGroup slg = (SongListGroup) v.getTag();
              v.setBackgroundColor(v.getResources().getColor(android.R.color.background_light));
              MainActivity ma = (MainActivity) v.getContext();
              if (ma.isMovingChildSongList()) {
                SongListChild slc =  new SongListChild((SongListChild) event.getLocalState());
                ma.getSongList().get(ma.getPreviousSelectedGroupSongList()).getSongs().remove(event.getLocalState());
                groups.get(slg.getPosition()).getSongs().add(slc);
                ma.setPreviousSelectedChildSongList(slg.getPosition());
                ma.setPreviousSelectedGroupSongList(slc.getPosition());
                ma.setMovingChildSongList(false);
              } else {
                SongListChild slc = new SongListChild((SongListChild) event.getLocalState());
                groups.get(slg.getPosition()).getSongs().add(slc);
              }
              notifyDataSetChanged();
              break;
            case DragEvent.ACTION_DRAG_ENDED:
              break;
              
            default:
              break;
            }
            return true;
          }
        });
      }
      return view;
    }
    
    public boolean hasStableIds() {
      // TODO Auto-generated method stub
      return true;
    }
  
    public boolean isChildSelectable(int arg0, int arg1) {
      // TODO Auto-generated method stub
      return true;
    }
      
    

}

Java Source Code List

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