Cómo aplicar un solo fondo para el grupo y el niño en la lista expandible

Cómo aplicar un fondo único para el grupo y el niño en listview expandible?

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MainActivity.java

package info.androidhive.expandablelistview; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.ExpandableListView; import android.widget.ExpandableListView.OnChildClickListener; import android.widget.ExpandableListView.OnGroupClickListener; import android.widget.ExpandableListView.OnGroupCollapseListener; import android.widget.ExpandableListView.OnGroupExpandListener; import android.widget.Toast; public class MainActivity extends Activity { ExpandableListAdapter listAdapter; ExpandableListView expListView; List<String> listDataHeader; HashMap<String, List<String>> listDataChild; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // get the listview expListView = (ExpandableListView) findViewById(R.id.lvExp); // preparing list data prepareListData(); listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild); // setting list adapter expListView.setAdapter(listAdapter); // Listview Group click listener expListView.setOnGroupClickListener(new OnGroupClickListener() { @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { // Toast.makeText(getApplicationContext(), // "Group Clicked " + listDataHeader.get(groupPosition), // Toast.LENGTH_SHORT).show(); return false; } }); // Listview Group expanded listener expListView.setOnGroupExpandListener(new OnGroupExpandListener() { @Override public void onGroupExpand(int groupPosition) { Toast.makeText(getApplicationContext(), listDataHeader.get(groupPosition) + " Expanded", Toast.LENGTH_SHORT).show(); } }); expListView.setDivider(null); expListView.setChildDivider(null); // Listview Group collasped listener expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() { @Override public void onGroupCollapse(int groupPosition) { Toast.makeText(getApplicationContext(), listDataHeader.get(groupPosition) + " Collapsed", Toast.LENGTH_SHORT).show(); } }); // Listview on child click listener expListView.setOnChildClickListener(new OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { // TODO Auto-generated method stub Toast.makeText( getApplicationContext(), listDataHeader.get(groupPosition) + " : " + listDataChild.get( listDataHeader.get(groupPosition)).get( childPosition), Toast.LENGTH_SHORT) .show(); return false; } }); } /* * Preparing the list data */ private void prepareListData() { listDataHeader = new ArrayList<String>(); listDataChild = new HashMap<String, List<String>>(); // Adding child data listDataHeader.add("Top 250"); listDataHeader.add("Now Showing"); listDataHeader.add("Coming Soon.."); // Adding child data List<String> top250 = new ArrayList<String>(); top250.add("The Shawshank Redemption"); top250.add("The Godfather"); top250.add("The Godfather: Part II"); top250.add("Pulp Fiction"); top250.add("The Good, the Bad and the Ugly"); top250.add("The Dark Knight"); top250.add("12 Angry Men"); List<String> nowShowing = new ArrayList<String>(); nowShowing.add("The Conjuring"); nowShowing.add("Despicable Me 2"); nowShowing.add("Turbo"); nowShowing.add("Grown Ups 2"); nowShowing.add("Red 2"); nowShowing.add("The Wolverine"); List<String> comingSoon = new ArrayList<String>(); comingSoon.add("2 Guns"); comingSoon.add("The Smurfs 2"); comingSoon.add("The Spectacular Now"); comingSoon.add("The Canyons"); comingSoon.add("Europa Report"); listDataChild.put(listDataHeader.get(0), top250); // Header, Child data listDataChild.put(listDataHeader.get(1), nowShowing); listDataChild.put(listDataHeader.get(2), comingSoon); } } 

ExpandableListAdapter.java

 package info.androidhive.expandablelistview; import java.util.HashMap; import java.util.List; import android.content.Context; import android.graphics.Typeface; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.TextView; 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; public ExpandableListAdapter(Context context, List<String> listDataHeader, HashMap<String, List<String>> listChildData) { this._context = context; this._listDataHeader = listDataHeader; this._listDataChild = listChildData; } @Override public Object getChild(int groupPosition, int childPosititon) { return this._listDataChild.get(this._listDataHeader.get(groupPosition)) .get(childPosititon); } @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.list_item, null); } TextView txtListChild = (TextView) convertView .findViewById(R.id.lblListItem); txtListChild.setText(childText); 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); convertView.setBackgroundResource(R.drawable.bubble_green); ExpandableListView mExpandableListView = (ExpandableListView) parent; mExpandableListView.expandGroup(groupPosition); } 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; } } 

Activity_main.xml

  <?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="fill_parent" android:orientation="vertical" > <ExpandableListView android:id="@+id/lvExp" android:layout_height="match_parent" android:layout_width="match_parent" android:groupIndicator="@null" /> </LinearLayout> 

List_item.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="55dip" android:orientation="vertical" > <TextView android:id="@+id/lblListItem" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="17dip" android:paddingTop="5dp" android:paddingBottom="5dp" android:textColor="#000000" android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft" /> </LinearLayout> 

List_group.xml

 <?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" > <TextView android:id="@+id/lblListHeader" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft" android:textSize="17dp" /> </LinearLayout> 

AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="info.androidhive.expandablelistview" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="Expandable" > <activity android:name="info.androidhive.expandablelistview.MainActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> 

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One Solution collect form web for “Cómo aplicar un solo fondo para el grupo y el niño en la lista expandible”

Puede establecer el fondo secundario a la misma drawable que se utiliza para el fondo del grupo y establecer su divisor ExpandableListView a null .

  expListView.setDivider(null); expListView.setChildDivider(null); 

Para quitar el indicador de grupo de los elementos primarios, también debe establecerlos en null:

 <ExpandableListView [...] android:groupIndicator="@null" /> 
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