Android Open Source - AndroidAdvancedDemos Universal List Adapter

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License

The source code is released under:
MIT License
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Java Source Code

package com.krieger.training.androidadvanceddemos.adapter;
// ww w .j  av  a2  s . co  m
import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.database.DataSetObserver;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;

import com.krieger.training.androidadvanceddemos.entities.HeadedList;
import com.krieger.training.androidadvanceddemos.interfaces.AdapterCommand;

public class UniversalListAdapter implements ListAdapter{
  
  private LayoutInflater inflater = null;
  private Context c = null;
  private int rowLayoutId;
  private ArrayList<Object> data;
  private AdapterCommand rowInflationAction;
  
  private ArrayList<Object> dataWithHeaders;
  private ArrayList<Integer> sectionHeaderIndexes;
  private int headerLayoutId;
  private AdapterCommand headerInflationAction;
  
  private boolean hasSections = false;
  
  public UniversalListAdapter(LayoutInflater inflater, int rowLayoutId,
      ArrayList<Object> data, AdapterCommand rowInflationAction) {
    this.inflater = inflater;
    this.rowLayoutId = rowLayoutId;
    this.data = data;
    this.rowInflationAction = rowInflationAction;
  }

  public UniversalListAdapter(Context c, int rowLayoutId,
      ArrayList<Object> data, AdapterCommand rowInflationAction) {
    this.c = c;
    this.rowLayoutId = rowLayoutId;
    this.data = data;
    this.rowInflationAction = rowInflationAction;
  }
  
  public UniversalListAdapter(LayoutInflater inflater, int rowLayoutId,
      ArrayList<Object> data, AdapterCommand rowInflationAction,
      boolean hasSections, int headerLayoutId,
      AdapterCommand headerInflationAction) {
    this.inflater = inflater;
    this.rowLayoutId = rowLayoutId;
    this.data = data;
    this.rowInflationAction = rowInflationAction;
    this.hasSections = hasSections;
    this.headerLayoutId = headerLayoutId;
    this.headerInflationAction = headerInflationAction;
    if(hasSections)
      arrangeData();
  }

  public UniversalListAdapter(Context c, int rowLayoutId,
      ArrayList<Object> data, AdapterCommand rowInflationAction,
      boolean hasSections, int headerLayoutId,
      AdapterCommand headerInflationAction) {
    this.c = c;
    this.rowLayoutId = rowLayoutId;
    this.data = data;
    this.rowInflationAction = rowInflationAction;
    this.hasSections = hasSections;
    this.headerLayoutId = headerLayoutId;
    this.headerInflationAction = headerInflationAction;
    if(hasSections)
      arrangeData();
  }

  private void arrangeData(){
    dataWithHeaders = new ArrayList<Object>();
    sectionHeaderIndexes = new ArrayList<Integer>();
    int count=-1;
    for(int i=0; i<data.size();i++){
      HeadedList<?, ?> d = (HeadedList<?,?>)data.get(i);
      dataWithHeaders.add(d.getHeader());
      sectionHeaderIndexes.add(++count);
      
      ArrayList<?> x = d.getContents();
      for(int j=0; j<x.size(); j++){
        count++;
        dataWithHeaders.add(x.get(j));
      }
    }
  }
  
  @Override
  public int getCount() {
    if(hasSections)
      return dataWithHeaders.size();
    else
      return data.size();
  }

  @Override
  public Object getItem(int position) {
    if(hasSections)
      return dataWithHeaders.get(position);
    else
      return data.get(position);
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public int getItemViewType(int position) {
    if(hasSections){
      if(sectionHeaderIndexes.contains(position))
        return 1;
      else
        return 0;
    }
    else
      return 0;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    View res = convertView;
    int layout=rowLayoutId;
    boolean isHeader=false;
    
    if(getItemViewType(position)==1){
      layout=headerLayoutId;
      isHeader=true;
    }
    if (res == null){
          if(c!=null)
            res = ((Activity)c).getLayoutInflater().inflate(layout, null);
          else if(inflater!=null)
            res = inflater.inflate(layout, null);
        }
    if(!isHeader)
      res=rowInflationAction.execute(getItem(position), res);
    else
      res=headerInflationAction.execute(getItem(position), res);
        return res;
  }

  @Override
  public int getViewTypeCount() {
    if(hasSections)
      return 2;
    else
      return 1;
  }

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

  @Override
  public boolean isEmpty() {
    return getCount()<1;
  }

  @Override
  public void registerDataSetObserver(DataSetObserver observer) {}

  @Override
  public void unregisterDataSetObserver(DataSetObserver observer) {}

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

  @Override
  public boolean isEnabled(int position) {
    return getItemViewType(position)==0;
  }

}
Java Source Code List
