Android Open Source - tracks-android Task List Adapter

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License

The source code is released under:

Copyright (c) 2010 Adam Wolfe Gordon <awg@xvx.ca> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to...

Java Source Code

package ca.xvx.tracks;
//  w w  w  .j av  a 2  s .c o  m
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

import java.util.Collections;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.Vector;

public class TaskListAdapter extends BaseExpandableListAdapter {
  private Vector<TodoContext> _contexts;
  private SortedMap<TodoContext, Vector<Task>> _tasks;

  private Handler _notifyHandler;

  public TaskListAdapter() {
    super();

    _contexts = new Vector<TodoContext>();
    _tasks = new TreeMap<TodoContext, Vector<Task>>();
  }

  public Handler getNotifyHandler() {
    if(_notifyHandler == null) {
      _notifyHandler = new Handler() {
          @Override
          public void handleMessage(Message msg) {
            notifyDataSetChanged();
          }
        };
    }

    return _notifyHandler;
  }

  @Override
  public void notifyDataSetChanged() {
    _contexts.clear();
    _tasks.clear();
    for(Task t : Task.getAllTasks()) {
      if(!t.getContext().isHidden()) {
        if(_tasks.get(t.getContext()) == null) {
          _contexts.add(t.getContext());
          _tasks.put(t.getContext(), new Vector<Task>());
        }
        _tasks.get(t.getContext()).add(t);
      }
      
    }

    Collections.sort(_contexts);
    for(TodoContext c : _contexts) {
      if(!c.isHidden()) {
        Collections.sort(_tasks.get(c));
      }
    }

    super.notifyDataSetChanged();
  }

  @Override
  public View getChildView(int group, int position, boolean isLastChild, View convert, ViewGroup parent) {
    TodoContext con = _contexts.get(group);
    if(con == null) {
      return null;
    }
    
    Task t = _tasks.get(con).get(position);
    if(t == null) {
      return null;
    }

    return new TaskListItem(parent.getContext(), t, getNotifyHandler());
  }

  @Override
  public View getGroupView(int group, boolean isExpanded, View convert, ViewGroup parent) {
    TodoContext con = _contexts.get(group);
    if(con == null) {
      return null;
    }

    LayoutInflater inflater = (LayoutInflater)parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View ret = inflater.inflate(android.R.layout.simple_expandable_list_item_1, null);
    TextView t = (TextView)ret.findViewById(android.R.id.text1);
    t.setText(con.getName());

    return ret;
  }

  @Override
  public int getChildrenCount(int group) {
    TodoContext con = _contexts.get(group);
    if(con == null) {
      return 0;
    }
    return _tasks.get(con).size();
  }

  @Override
  public int getGroupCount() {
    return _contexts.size();
  }

  @Override
  public Object getChild(int group, int pos) {
    TodoContext con = _contexts.get(group);
    return _tasks.get(con).get(pos);
  }

  @Override
  public long getChildId(int group, int pos) {
    return pos;
  }

  @Override
  public long getGroupId(int group) {
    return group;
  }

  @Override
  public Object getGroup(int group) {
    return _contexts.get(group);
  }

  @Override
  public boolean hasStableIds() {
    return false;
  }

  @Override
  public boolean isChildSelectable(int g, int p) {
    return true;
  }
}

Java Source Code List

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