Add EditText to ExpandableListView in Android

Question

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class MainActivity extends AppCompatActivity {

ExpandableListView expandableListView;
ExpandableListAdapter expandableListAdapter;
List<String> expandableListTitle;
HashMap<String, List<String>> expandableListDetail;

@Override
protected void onCreate(Bundle savedInstanceState) {
    try {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
        //expandableListDetail = ExpandableListDataPump.getData();
        //expandableListTitle = new ArrayList<String>(expandableListDetail.keySet());
        expandableListTitle = new ArrayList<>();
        expandableListDetail = new HashMap<>();
        expandableListAdapter = new CustomExpandableListAdapter(this, expandableListTitle, expandableListDetail);
        expandableListView.setAdapter(expandableListAdapter);
        expandableListTitle.add("List title");
        expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {

            @Override
            public void onGroupExpand(int groupPosition) {
                Toast.makeText(getApplicationContext(),
                        expandableListTitle.get(groupPosition) + " List Expanded.",
                        Toast.LENGTH_SHORT).show();
            }
        });

        expandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {

            @Override
            public void onGroupCollapse(int groupPosition) {
                Toast.makeText(getApplicationContext(),
                        expandableListTitle.get(groupPosition) + " List Collapsed.",
                        Toast.LENGTH_SHORT).show();

            }
        });

        expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
            @Override
            public boolean onChildClick(ExpandableListView parent, View v,
                                        int groupPosition, int childPosition, long id) {
                try {
                    Toast.makeText(
                            getApplicationContext(),
                            expandableListTitle.get(groupPosition)
                                    + " -> "
                                    + expandableListDetail.get(
                                    expandableListTitle.get(groupPosition)).get(
                                    childPosition), Toast.LENGTH_SHORT
                    ).show();

                }catch (Exception e){
                    Log.e("Child","Excep due to"+e.toString());
                }
                return false;
            }
        });
    }catch (Exception e)
    {
        e.printStackTrace();
        Log.e("/Test","/Excp due to"+e.toString());
    }
}
}



import java.util.HashMap;
import java.util.List;
import android.content.Context;
import android.graphics.Typeface;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.EditText;
import android.widget.TextView;

public class CustomExpandableListAdapter extends BaseExpandableListAdapter {

private Context context;
private List<String> expandableListTitle;
private HashMap<String, List<String>> expandableListDetail;
final EditText[] etIndividualLetterValues = new EditText[26];
public CustomExpandableListAdapter(Context context, List<String> expandableListTitle,
                                   HashMap<String, List<String>> expandableListDetail) {
    try {
        this.context = context;
        this.expandableListTitle = expandableListTitle;
        this.expandableListDetail = expandableListDetail;
    }catch(Exception e)
    {
        e.printStackTrace();
        Log.e("/Test","/Excp due to"+e.toString());
    }
}
public CustomExpandableListAdapter(Context context, List<String> expandableListTitle){
    try{
        this.context=context;
        this.expandableListTitle=expandableListTitle;
    }catch(Exception e)
    {
        e.printStackTrace();
        Log.e("/test","/Exception due to"+e.toString());
    }

}
@Override
public Object getChild(int listPosition, int expandedListPosition) {
    return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
            .get(expandedListPosition);
}

@Override
public long getChildId(int listPosition, int expandedListPosition) {
    return expandedListPosition;
}

@Override
public View getChildView(int listPosition, final int expandedListPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {
    try {
        final String expandedListText = (String) getChild(listPosition, expandedListPosition);
        if (convertView == null) {
            LayoutInflater layoutInflater = (LayoutInflater) this.context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.list_item, null);
        }
        EditText expandedListEditText = (EditText) convertView
                .findViewById(R.id.expandedListItem);
        expandedListEditText.setText(expandedListText);
        return convertView;
    }catch (Exception e)
    {
        e.printStackTrace();
        Log.e("/Test","/Excp due to"+e.toString());
        return null;
    }
}

@Override
public int getChildrenCount(int listPosition) {
    return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
            .size();
}

@Override
public Object getGroup(int listPosition) {
    return this.expandableListTitle.get(listPosition);
}

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

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


@Override
public View getGroupView(int listPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    try {
        String listTitle = (String) getGroup(listPosition);
        if (convertView == null) {
            LayoutInflater layoutInflater = (LayoutInflater) this.context.
                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.list_group, null);
        }
        TextView listTitleTextView = (TextView) convertView
                .findViewById(R.id.listTitle);
        listTitleTextView.setTypeface(null, Typeface.BOLD);
        listTitleTextView.setText(listTitle);
        return convertView;
    }catch (Exception e)
    {
        e.printStackTrace();
        Log.e("/Test","/Excp due to"+e.toString());
        return null;
    }
}

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

@Override
public boolean isChildSelectable(int listPosition, int expandedListPosition) {
    return true;
}
}

list_group.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
    android:id="@+id/listTitle"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
    android:textColor="@android:color/black"
    android:paddingTop="10dp"
    android:text="textview"
    android:paddingBottom="10dp" />
</LinearLayout>

list_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
    android:id="@+id/expandedListItem"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft"
    android:paddingTop="10dp"
    android:hint="Test"
    android:paddingBottom="10dp" />
</LinearLayout>

I have posted all my code. When I click on list title, It's not expanding the list it shows "Unfortunately Stopped". This code sets the title to Expandablelistview. But it does not set the EditText to the Expandablelistview. Why? Is there any changed needed in setOnChildClickListener method?

How to add EditText . Any help would be appreciated.

Answer 1

I think the problem is when u are initializing the list and hashmap . The way u have written ur adapter it should be initialized like following.

expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
        //expandableListDetail = ExpandableListDataPump.getData();
        //expandableListTitle = new ArrayList<String>(expandableListDetail.keySet());


        expandableListTitle = new ArrayList<>();
        expandableListTitle.add("Address");
        expandableListTitle.add("Address");
//        expandableListTitle.add("Address");
        expandableListTitle1 = new ArrayList<>();
        expandableListTitle1.add("Enter State here");
        expandableListTitle1.add("Enter Country here");

        expandableListDetail = new HashMap<>();
    expandableListDetail.put(expandableListTitle.get(0),expandableListTitle1);

        expandableListAdapter = new CustomExpandableListAdapter(this, expandableListTitle, expandableListDetail);
        expandableListView.setAdapter(expandableListAdapter);

public class CustomExpandableListAdapter extends BaseExpandableListAdapter {

    private Context context;
    private List<String> expandableListTitle;
    private HashMap<String, List<String>> expandableListDetail;
    final EditText[] etIndividualLetterValues = new EditText[26];

    public CustomExpandableListAdapter(Context context, List<String> expandableListTitle,
                                       HashMap<String, List<String>> expandableListDetail) {
        try {
            this.context = context;
            this.expandableListTitle = expandableListTitle;
            this.expandableListDetail = expandableListDetail;
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("/Test", "/Excp due to" + e.toString());
        }
    }

    public CustomExpandableListAdapter(Context context, List<String> expandableListTitle) {
        try {
            this.context = context;
            this.expandableListTitle = expandableListTitle;
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("/test", "/Exception due to" + e.toString());
        }

    }

    @Override
    public Object getChild(int listPosition, int expandedListPosition) {
        return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
                .get(expandedListPosition);
    }

    @Override
    public long getChildId(int listPosition, int expandedListPosition) {
        return expandedListPosition;
    }

    @Override
    public View getChildView(int listPosition, final int expandedListPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {
        try {
            final String expandedListText = (String) getChild(listPosition, expandedListPosition);
            if (convertView == null) {
                LayoutInflater layoutInflater = (LayoutInflater) this.context
                        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = layoutInflater.inflate(R.layout.list_item, null);
            }
            EditText expandedListEditText = (EditText) convertView
                    .findViewById(R.id.expandedListItem);
            //expandedListEditText.setText(expandedListText);


expandedListEditText.setHint(expandedListText);
            return convertView;
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("/Test", "/Excp due to" + e.toString());
            return null;
        }
    }

    @Override
    public int getChildrenCount(int listPosition) {
        return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
                .size();
    }

    @Override
    public Object getGroup(int listPosition) {
        return this.expandableListTitle.get(listPosition);
    }

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

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


    @Override
    public View getGroupView(int listPosition, boolean isExpanded,View convertView, ViewGroup parent) {
        try {
            String listTitle = (String) getGroup(listPosition);
            if (convertView == null) {
                LayoutInflater layoutInflater = (LayoutInflater) this.context.
                        getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = layoutInflater.inflate(R.layout.list_group, null);
            }
            TextView listTitleTextView = (TextView) convertView
                    .findViewById(R.id.listTitle);
            listTitleTextView.setTypeface(null, Typeface.BOLD);
            listTitleTextView.setText(listTitle);
            return convertView;
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("/Test", "/Excp due to" + e.toString());
            return null;
        }
    }

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

    @Override
    public boolean isChildSelectable(int listPosition, int expandedListPosition) {
        return true;
    }
}