We are aware about android most powerful feature ListView. We can handle ListView click event eg. clicking on ListView row, we can start a new activity or what ever we want to do.
But it some how strange to many developer, clicking on ListView row it should expand and show more details in spite of opening a new Activity and we can shrink row of ListView after reading details information. This is feature known as ExpandableListView in android.
But it some how strange to many developer, clicking on ListView row it should expand and show more details in spite of opening a new Activity and we can shrink row of ListView after reading details information. This is feature known as ExpandableListView in android.
ExpandableListView is pre-define widget in android . and much similar to android ListView.
So here we go for ExpandableListView Simple Example with source code at the end of this article.
Step 1) create one project. There is only one class to explain here package com.ahmad.expandable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.widget.ExpandableListAdapter;
import android.widget.SimpleExpandableListAdapter;
/**
* Demonstrates expandable lists backed by a Simple Map-based adapter
*/
public class ExpandableList extends ExpandableListActivity {
private static final String NAME = "NAME";
private static final String IS_EVEN = "IS_EVEN";
private ExpandableListAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
List<Map<String, String>> groupData = new ArrayList<Map<String, String>>();
List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();
for (int i = 0; i < 20; i++) {
Map<String, String> curGroupMap = new HashMap<String, String>();
groupData.add(curGroupMap);
curGroupMap.put(NAME, "Group " + i);
curGroupMap.put(IS_EVEN, (i % 2 == 0) ? "This group is even" : "This group is odd");
List<Map<String, String>> children = new ArrayList<Map<String, String>>();
for (int j = 0; j < 15; j++) {
Map<String, String> curChildMap = new HashMap<String, String>();
children.add(curChildMap);
curChildMap.put(NAME, "Child " + j);
curChildMap.put(IS_EVEN, (j % 2 == 0) ? "This child is even" : "This child is odd");
}
childData.add(children);
}
// Set up our adapter
mAdapter = new SimpleExpandableListAdapter(
this,
groupData,
android.R.layout.simple_expandable_list_item_1,
new String[] { NAME, IS_EVEN },
new int[] { android.R.id.text1, android.R.id.text2 },
childData,
android.R.layout.simple_expandable_list_item_2,
new String[] { NAME, IS_EVEN },
new int[] { android.R.id.text1, android.R.id.text2 }
);
setListAdapter(mAdapter);
}
}
Can you tell me how to make a click listener on any child ?
ReplyDelete
DeleteHi, Great.. Tutorial is just awesome..It is really helpful for a newbie like me.. I am a regular follower of your blog. Really very informative post you shared here. Kindly keep blogging. If anyone wants to become a Front end developer learn from ES6 Training in Chennai . or learn thru ES6 Training in Chennai. Nowadays JavaScript has tons of job opportunities on various vertical industry. ES6 Online Training from India
Hey Mobapp Resource, You are copying my content as it is, Giving reference is another thing, it make surprised that you copied line by line. I request you to remove them before i spam your blog. If you want to keep it, then write few line and gave a link to my blog as read more
ReplyDelete