Android Open Source - TextFileXpanderAndroid Custom Expandable List Adapter

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License

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

//
//  SystemBroadcastReceiver.java
//  TextFileXpander
///*from  w  w  w.  ja va 2  s .  c  o m*/
//  Created by wanswings on 2014/09/09.
//  Copyright (c) 2014 wanswings. All rights reserved.
//
package com.wanswings.TextFileXpander;

import java.util.List;
import java.util.Map;

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

public class CustomExpandableListAdapter extends BaseExpandableListAdapter {
  private List<? extends Map<String, ?>> mGroupData;
  private List<? extends Integer> mGroupLayout;
  private String[] mGroupFrom;
  private int[] mGroupTo;

  private List<? extends List<? extends Map<String, ?>>> mChildData;
  private List<? extends List<? extends Integer>> mChildLayout;
  private String[] mChildFrom;
  private int[] mChildTo;

  private LayoutInflater mInflater;

  public CustomExpandableListAdapter(
        Context context,
        List<? extends Map<String, ?>> groupData,
        List<? extends Integer> groupLayout,
        String[] groupFrom,
        int[] groupTo,
        List<? extends List<? extends Map<String, ?>>> childData,
        List<? extends List<? extends Integer>> childLayout,
        String[] childFrom,
        int[] childTo
        ) {
    mGroupData = groupData;
    mGroupLayout = groupLayout;
    mGroupFrom = groupFrom;
    mGroupTo = groupTo;

    mChildData = childData;
    mChildLayout = childLayout;
    mChildFrom = childFrom;
    mChildTo = childTo;

    mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }

  @Override
  public Object getChild(int groupPosition, int childPosition) {
    return mChildData.get(groupPosition).get(childPosition);
  }

  @Override
  public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
  }

  @Override
  public int getChildType(int groupPosition, int childPosition) {
    if (mChildLayout.get(groupPosition).get(childPosition) == R.layout.list_separator)
      return 0;
    else
      return 1;
  }

  @Override
  public int getChildTypeCount() {
    return 2;
  }

  @Override
  public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
    View v;
    if (convertView == null) {
      v = mInflater.inflate(mChildLayout.get(groupPosition).get(childPosition), parent, false);
    } else {
      v = convertView;
    }
    bindView(v, mChildData.get(groupPosition).get(childPosition), mChildFrom, mChildTo);
    return v;
  }

  private void bindView(View view, Map<String, ?> data, String[] from, int[] to) {
    int len = to.length;

    for (int i = 0; i < len; i++) {
      TextView v = (TextView)view.findViewById(to[i]);
      if (v != null) {
        v.setText((String)data.get(from[i]));
      }
    }
  }

  @Override
  public int getChildrenCount(int groupPosition) {
    return mChildData.get(groupPosition).size();
  }

  @Override
  public Object getGroup(int groupPosition) {
    return mGroupData.get(groupPosition);
  }

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

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

  @Override
  public int getGroupType(int groupPosition) {
    if (mGroupLayout.get(groupPosition) == R.layout.list_separator)
      return 0;
    else
      return 1;
  }

  @Override
  public int getGroupTypeCount() {
    return 2;
  }

  @Override
  public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    View v;
    if (convertView == null) {
      v = mInflater.inflate(mGroupLayout.get(groupPosition), parent, false);
    } else {
      v = convertView;
    }
    bindView(v, mGroupData.get(groupPosition), mGroupFrom, mGroupTo);
    return v;
  }

  @Override
  public boolean isChildSelectable(int groupPosition, int childPosition) {
    if (mChildLayout.get(groupPosition).get(childPosition) == R.layout.list_separator) {
      return false;
    }
    else {
      return true;
    }
  }

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

}
Java Source Code List
