I have followed this example tutorial and developed a sample application http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/
If i click on Core i want to load one more list in the same Screen under Core,How Could i do this?using my below code i am able to load the child list in another Screen,help?
My Code for ChildClickListener goes here:
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
Log.d("onChildClick", "onChildClick");
String position = (String) parentItems.get(groupPosition);
Log.d("position", position);
String child = listDataChild.get(position).get(childPosition);
Log.d("child", child);
if (child.equalsIgnoreCase("Core")) {
ArrayList<String> parentItems = new ArrayList<String>();
HashMap<String, List<String>> listDataChild = new HashMap<String, List<String>>();
ArrayList<String> childItems = new ArrayList<String>();
childItems.add("corejava");
childItems.add("corejava");
childItems.add("corejava");
childItems.add("corejava");
parentItems.add(position);
listDataChild.put(parentItems.get(0), childItems);
expandableList = (ExpandableListView) findViewById(R.id.lvExp);
CoreAdapter adapter = new CoreAdapter(parentItems,
listDataChild);
CustExpListview SecondLevelexplv = new CustExpListview(
MainActivity.this);
adapter.setInflater(
(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE),
MainActivity.this);
SecondLevelexplv.setAdapter(adapter);
SecondLevelexplv.setGroupIndicator(null);
expandableList.setAdapter(adapter);
}
Android ListView is a view which groups several items and display them in vertical scrollable list. The list items are automatically inserted to the list using an Adapter that pulls content from a source such as an array or database.
Android ExpandableListView is a view that shows items in a vertically scrolling two-level list. It differs from a ListView by allowing two levels which are groups that can be easily expanded and collapsed by touching to view and their respective children items.
How do I change the icon on expandable list view? Post the listView row xml. @RajeshCP see update one. Onclick of the onItemClick function you can change the source of the group_indicator for that you need a uparrow button or else you can rotate the bitmap by some dregree and set it as a source for that ImageView.
You have to use Adapter's getChild(groupPosition, childPosition) method to retrieve the instance of child.
i write one treeView adapter for you, you can use this and put many level as you want, for that you need just copy following code:
MainActivity:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// add data for test on one list<AccountHierarchical>
AccountHierarchical obj = new AccountHierarchical();
obj.setLevelId(1);
obj.setTitle("level 1");
AccountHierarchical obj2 = new AccountHierarchical();
obj2.setLevelId(1);
obj2.setTitle("level 2");
AccountHierarchical obj3 = new AccountHierarchical();
obj3.setLevelId(1);
obj3.setTitle("level 3");
List<AccountHierarchical> emptyList = new ArrayList<AccountHierarchical>();
obj3.setList(emptyList);
List<AccountHierarchical> list2 = new ArrayList<AccountHierarchical>();
list2.add(obj3);list2.add(obj3);list2.add(obj3);list2.add(obj3);list2.add(obj3);
obj2.setList(list2);
List<AccountHierarchical> list = new ArrayList<AccountHierarchical>();
list.add(obj2);list.add(obj2);list.add(obj2);list.add(obj2);list.add(obj2);
obj.setList(list);
List<AccountHierarchical> result = new ArrayList<AccountHierarchical>();
result.add(obj);result.add(obj);result.add(obj);result.add(obj);
// create Adapter
TreeView adapter = new TreeView(result, this,
getLayoutInflater() , false, 0);
ExpandableListView expandList = (ExpandableListView)findViewById(R.id.expandableList_tree);
expandList.setGroupIndicator(null);
expandList.setAdapter(adapter);
}
CustExpListview:
public class CustExpListview extends ExpandableListView {
int intGroupPosition, intChildPosition, intGroupid;
public CustExpListview(Context context) {
super(context);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// widthMeasureSpec = MeasureSpec.makeMeasureSpec(400,
// MeasureSpec.AT_MOST);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(600,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
AccountHierarchical:
public class AccountHierarchical {
List<AccountHierarchical> list;
private String Title;
private int Id;
public int getId() {
return Id;
}
public void setLevelId(int Id) {
this.Id = Id;
}
public String getTitle() {
return Title;
}
public void setTitle(String title) {
Title = title;
}
public List<AccountHierarchical> getList() {
return list;
}
public void setList(List<AccountHierarchical> list) {
this.list = list;
}
}
TreeView:
public class TreeView extends BaseExpandableListAdapter implements
OnClickListener {
List<AccountHierarchical> list;
LayoutInflater inflatter;
static Context context;
boolean checkGroup;
int position;
static ProgressDialog ProgressDialog;
public TreeView( List<AccountHierarchical> list, Context context,
LayoutInflater inflatter, boolean checkGroup, int position
) {
this.list = list;
TreeView.context = context;
this.inflatter = inflatter;
this.checkGroup = checkGroup; // this is true when you call from inner.
this.position = position;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return list.get(groupPosition).getList().get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return list.get(groupPosition).getList().get(childPosition).getId();
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (checkGroup)
groupPosition = position;
List<AccountHierarchical> childtemp = list.get(groupPosition)
.getList();
// call this adapter again for creating another level
if (childtemp.get(childPosition).getList().size() > 0) {
CustExpListview SecondLevelexplv = new CustExpListview(context);
TreeView adapter = null;
adapter = new TreeView(childtemp, context,
inflatter, true, childPosition);
SecondLevelexplv.setGroupIndicator(null);
SecondLevelexplv.setAdapter(adapter);
return SecondLevelexplv;
}
// call one layout, this is last child
else {
convertView = inflatter.inflate(R.layout.grouprow, null);
TextView tv = (TextView) convertView.findViewById(R.id.grouprow);
tv.setText(list.get(groupPosition).getList().get(childPosition)
.getTitle());
tv.setPadding(0, 0, 20, 0);
convertView.setTag(list.get(groupPosition).getList()
.get(childPosition) );
convertView.setId(position);
convertView.setOnClickListener(this);
return convertView;
}
}
@Override
public int getChildrenCount(int groupPosition) {
return list.get(groupPosition).getList().size();
}
@Override
public Object getGroup(int groupPosition) {
return list.get(groupPosition);
}
@Override
public int getGroupCount() {
if (checkGroup)
return 1;
return list.size();
}
@Override
public long getGroupId(int groupPosition) {
return list.get(groupPosition).getId();
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null)
convertView = inflatter.inflate(R.layout.grouprow, null);
TextView tv = (TextView) convertView.findViewById(R.id.grouprow);
if (checkGroup)
tv.setText(list.get(position).getTitle());
else
tv.setText(list.get(groupPosition).getTitle());
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
@Override
public void onClick(View v) {
// your onClick method
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<ExpandableListView
android:id="@+id/expandableList_tree"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ExpandableListView>
</RelativeLayout>
grouprow.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/grouprow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginBottom="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:text=""/>
</RelativeLayout>
snap:
You have to create a layout in the xml file (from where your core textview comes from) and display an image view below onClick of that imageView you will just have to make your layout Gone and Visible I have just given you direction rest relies on your skill :)
<RelativeLayout
android:id="@+id/option"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:gravity="center"
android:orientation="horizontal" >
</RelativeLayout>
<RelativeLayout
android:id="@+id/linear"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:orientation="horizontal" >
<ImageView
android:id="@+id/navigationIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:src="@drawable/nn" />
<ImageView
android:id="@+id/callOption"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/phonee" />
<ImageView
android:id="@+id/imageViewfeedback"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="@drawable/editer" />
</RelativeLayout>
In Jave File
linear.setVisibility(View.GONE);
option.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
if(count==0)
{
linear.setVisibility(View.VISIBLE);
count=1;
}
else
{
linear.setVisibility(View.GONE);
count=0;
}
}
});
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