Hi, I am trying to create a custom expandable list where there is a group view and child view will have a checkboxes.
If i click on group view checkbox then all the child view checkboxes should
checked and vice versa...
Basically I want to implement check all and uncheck all functionality.
I have tried like this but which is not updating properly. Is anybody is
having any idea about this.
I am passing data something like this:
private static final String[][] data =
{{"audia4","audiq7","audir8"},{"bmwm6","bmwx6"},{"ferrarienzo","ferrarif430","ferrarif430italia"}};
package com.test.sample;
import java.util.HashMap;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.text.Html;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ExpandableListAdapter;
public class SampleExpandableListAdapter extends BaseExpandableListAdapter
implements ExpandableListAdapter {
public Context context;
CheckBox checkBox;
private LayoutInflater vi;
private String[][] data;
int _objInt;
public static Boolean checked[] = new Boolean[1];
HashMap<Long, Boolean> checkboxMap = new HashMap<Long, Boolean>();
HashMap<Integer, Boolean> m_checkboxMap = new HashMap<Integer, Boolean>();
private static final int GROUP_ITEM_RESOURCE = R.layout.group_item;
private static final int CHILD_ITEM_RESOURCE = R.layout.child_item;
public String[] check_string_array;
// Abhi
private int mgroupPos = 0;
private static ViewHolder holder;
static int m_groupPosition = 0;
public SampleExpandableListAdapter(Context context, Activity activity,
String[][] data) {
this.data = data;
this.context = context;
vi = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
_objInt = data.length;
check_string_array = new String[_objInt];
popolaCheckMap();
}
public void popolaCheckMap() {
SharedPreferences settings = PreferenceManager
.getDefaultSharedPreferences(context);
String buffer = null;
for (int i = 0; i < _objInt; i++) {
buffer = settings.getString(String.valueOf((int) i), "false");
if (buffer.equals("false"))
checkboxMap.put((long) i, false);
else
checkboxMap.put((long) i, true);
}
}
public class CheckListener implements OnCheckedChangeListener {
long pos;
int m_pos;
public void setPosition(long p) {
pos = p;
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
Log.i("checkListenerChanged",
String.valueOf(pos) + ":" + String.valueOf(isChecked));
checkboxMap.put(pos, isChecked);
try {
updateCheckbox();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (isChecked == true)
check_string_array[(int) pos] = "true";
else
check_string_array[(int) pos] = "false";
// save checkbox state of each group
SharedPreferences settings = PreferenceManager
.getDefaultSharedPreferences(context);
SharedPreferences.Editor preferencesEditor = settings.edit();
preferencesEditor.putString(String.valueOf((int) pos),
check_string_array[(int) pos]);
preferencesEditor.commit();
}
}
public String getChild(int groupPosition, int childPosition) {
return data[groupPosition][childPosition];
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
mgroupPos = groupPosition;
return data[groupPosition].length;
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
m_groupPosition = groupPosition;
View v = convertView;
String child = getChild(groupPosition, childPosition);
System.out.println("Abhi getChildView child: " + child);
int id_res = 0;
if (groupPosition == 0) {
if (childPosition == 0)
id_res = R.drawable.audi_a4;
if (childPosition == 1)
id_res = R.drawable.audi_q7;
if (childPosition == 2)
id_res = R.drawable.audi_r8;
} else if (groupPosition == 1) {
if (childPosition == 0)
id_res = R.drawable.bmw_m6;
if (childPosition == 1)
id_res = R.drawable.bmw_x6;
} else if (groupPosition == 2) {
if (childPosition == 0)
id_res = R.drawable.ferrari_enzo;
if (childPosition == 1)
id_res = R.drawable.ferrari_f430;
if (childPosition == 2)
id_res = R.drawable.ferrari_f430_italia;
}
if (child != null) {
v = vi.inflate(CHILD_ITEM_RESOURCE, null);
holder = new ViewHolder(v);
holder.text.setText(Html.fromHtml(child));
holder.imageview.setImageResource(id_res);
// Abhi
CheckListener checkL = new CheckListener();
// checkL.setPosition(group_id);
holder.checkbox.setOnCheckedChangeListener(checkL);
// holder.checkbox.setChecked(checkboxMap.get(group_id));
// Abhi
if(checkboxMap.get((long)groupPosition) == true){
holder.checkbox.setChecked(true);
}else{
holder.checkbox.setChecked(false);
}
}
return v;
}
public String getGroup(int groupPosition) {
return "group-" + groupPosition;
}
public int getGroupCount() {
return data.length;
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
View v = convertView;
String group = null;
int id_res = 0;
long group_id = getGroupId(groupPosition);
if (group_id == 0) {
group = "Audi";
id_res = R.drawable.audi;
} else if (group_id == 1) {
group = "BMW";
id_res = R.drawable.bmw;
} else if (group_id == 2) {
group = "Ferrari";
id_res = R.drawable.ferrari;
}
if (group != null) {
v = vi.inflate(GROUP_ITEM_RESOURCE, null);
ViewHolder holder = new ViewHolder(v);
holder.text.setText(Html.fromHtml(group));
holder.imageview.setImageResource(id_res);
holder.checkbox.setFocusable(false);
CheckListener checkL = new CheckListener();
checkL.setPosition(group_id);
holder.checkbox.setOnCheckedChangeListener(checkL);
holder.checkbox.setChecked(checkboxMap.get(group_id));
notifyDataSetChanged();
}
return v;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
private void updateCheckbox(){
System.out.println();
if(checkboxMap.get((long)m_groupPosition) == true){
holder.checkbox.setChecked(true);
}else{
holder.checkbox.setChecked(false);
}
}
}
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SampleExpandableAdapter.java
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