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How to handle click child event in Expandablelistview in Android?

I am creating an extensible list in Android. I add three text images in the relative layout, and two buttons in the horizontal linear layout mean that these two buttons are added to the same line, so how can I fire the click event on these two buttons?

And I want to trigger another action when I click a button in the drop-down list. But I did not find the slightest idea how to click on a child in an ExpandableListView .

Here is my xml file.

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@android:color/white" android:padding="2dp" > <TextView android:id="@+id/TextView_Projectdetails" android:layout_width="match_parent" android:layout_height="25dp" android:background="@drawable/button_shape" android:paddingLeft="10sp" android:textColor="@android:color/black" /> <TextView android:id="@+id/textOne" android:layout_width="match_parent" android:layout_height="25dp" android:layout_below="@+id/TextView_Projectdetails" android:layout_marginTop="2dp" android:background="@drawable/button_shape" android:paddingLeft="10sp" android:textColor="@android:color/black" > </TextView> <TextView android:id="@+id/textTwo" android:layout_width="match_parent" android:layout_height="25dp" android:layout_below="@+id/textOne" android:layout_marginTop="2dp" android:background="@drawable/button_shape" android:paddingLeft="10sp" android:textColor="@android:color/black" > </TextView> <LinearLayout android:id="@+id/linearlAYOUT" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/textTwo" android:layout_marginTop="5dp" android:orientation="horizontal" > <Button android:id="@+id/button_EditedTask" android:layout_width="0dp" android:layout_height="27dp" android:layout_gravity="center" android:layout_weight="1" android:background="@drawable/button_shape_two" android:gravity="center" android:paddingBottom="3sp" android:paddingTop="3sp" android:text="ASSIGN TASK" android:focusable="false" android:textColor="@android:color/white" android:textSize="12sp" android:textStyle="normal" /> <Button android:id="@+id/buttonViewTask" android:layout_width="0dp" android:layout_height="27dp" android:layout_gravity="center_vertical|center_horizontal" android:layout_marginLeft="3dp" android:layout_weight="1" android:background="@drawable/button_shape_one" android:gravity="center" android:paddingBottom="3sp" android:paddingTop="3sp" android:text="VIEW TASK" android:focusable="false" android:textColor="@android:color/white" android:textSize="12sp" android:textStyle="normal" /> </LinearLayout> </RelativeLayout>

List_Group List File -

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="8dp" android:background="#000000"> <TextView android:id="@+id/lblListHeader" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft" android:textSize="17dp" android:textColor="#f9f93d" /> </LinearLayout>

here is my ExpandableListAdapter class -

 public class ExpandableListAdapter extends BaseExpandableListAdapter { private Context _context; private List<String> _listDataHeader; // header titles // child data in format of header title, child title private HashMap<String, List<String>> _listDataChild; Context context; public ExpandableListAdapter(Context context, List<String> listDataHeader, HashMap<String, List<String>> listChildData) { this._context = context; this._listDataHeader = listDataHeader; this._listDataChild = listChildData; } public ExpandableListAdapter (My_Project my_Project, List createGroupList, int listGroup, String[] strings, int[] is, List createChildList, int childItem, String[] strings2, int[] is2) { // TODO Auto-generated constructor stub } @Override public Object getChild(int groupPosition, int childPosition) { //this.get(groupPosition).getChildren().get(childPosition); String strchildPosition = this._listDataChild.get(this._listDataHeader.get(groupPosition)).get(childPosition); System.out.println("Child Position =" + strchildPosition); return this._listDataChild.get(this._listDataHeader.get(groupPosition)) .get(childPosition); } @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; } @Override public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { final String childText = (String) getChild(groupPosition, childPosition); if (convertView == null) { LayoutInflater infalInflater = (LayoutInflater) this._context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = infalInflater.inflate(R.layout.child_item, null); } TextView txtListChild = (TextView) convertView.findViewById(R.id.TextView_Projectdetails); TextView txtOneListChild = (TextView)convertView.findViewById(R.id.textOne); TextView txtTwoListChild = (TextView)convertView.findViewById(R.id.textTwo); txtListChild.setText(childText); txtOneListChild.setText(childText); txtTwoListChild.setText(childText); Button btnAssgnTask = (Button)convertView.findViewById(R.id.button_EditedTask); btnAssgnTask.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub //Intent i=new Intent(context,Assign_Task.class); //StartElementListener() } }); Button btnViewTask = (Button)convertView.findViewById(R.id.buttonViewTask); return convertView; } @Override public int getChildrenCount(int groupPosition) { return this._listDataChild.get(this._listDataHeader.get(groupPosition)) .size(); } @Override public Object getGroup(int groupPosition) { return this._listDataHeader.get(groupPosition); } @Override public int getGroupCount() { return this._listDataHeader.size(); } @Override public long getGroupId(int groupPosition) { return groupPosition; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { String headerTitle = (String) getGroup(groupPosition); if (convertView == null) { LayoutInflater infalInflater = (LayoutInflater) this._context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = infalInflater.inflate(R.layout.list_group, null); } TextView lblListHeader = (TextView) convertView .findViewById(R.id.lblListHeader); lblListHeader.setTypeface(null, Typeface.BOLD); lblListHeader.setText(headerTitle); return convertView; } @Override public boolean hasStableIds() { return false; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } }

Here is my activity code -

 public class My_Project extends ExpandableListActivity { expListView = (ExpandableListView) findViewById(android.R.id.list); expListView.setOnGroupClickListener(new OnGroupClickListener() { @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { return false; } }); expListView.setOnGroupExpandListener(new OnGroupExpandListener() { @Override public void onGroupExpand(int groupPosition) { Toast.makeText(getApplicationContext(), dtrProjectNAmeSize.length + " Expanded", Toast.LENGTH_SHORT).show(); } }); expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() { @Override public void onGroupCollapse(int groupPosition) { Toast.makeText(getApplicationContext(), dtrProjectNAmeSize.length + " Collapsed", Toast.LENGTH_SHORT).show(); } }); expListView.setOnChildClickListener(new OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { // TODO Auto-generated method stub int cp = (int) mAdapter.getChildId(groupPosition, childPosition); if(cp == 3) { switch (cp) { case 3: break; } } return false; } }); mAdapter = new SimpleExpandableListAdapter( this, groupData, R.layout.list_group, new String[] { Project_Name }, new int[] {R.id.lblListHeader }, childData, R.layout.child_item, new String[] { Project_Date_Created , Project_End_Date , Project_Is_Active}, new int[] { R.id.TextView_Projectdetails , R.id.textOne , R.id.textTwo } ); expListView.setAdapter(mAdapter); } }
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2 answers

You can set setOnChildClickListener from the chid of the extensible list, and then move on to another action according to the value of the array list that is used to create the extensible list.

  menuExpandableListView .setOnChildClickListener(new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick( ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { GoCategory(mainMenusList.get(groupPosition) .getPagesList().get(childPosition)); return false; } });

Or you can do it

 @Override public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { Page page =(Page) getChild(groupPosition, childPosition); convertView = inflater.inflate(R.layout.child_list_layout, null); Button button1=(Button)convertView.findViewById(R.id.button1); button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Your code here.... } }); return convertView; }
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What are you trying to do here -

 expListView.setOnChildClickListener(new OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { // TODO Auto-generated method stub int cp = (int) mAdapter.getChildId(groupPosition, childPosition); if(cp == 3) { switch (cp) { case 3: break; } } return false; } });

This listener uses to refer to the child element, calls startActivity(intent) in this part of the code.

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Source: https://habr.com/ru/post/970893/

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