Altura dinámica de Android ExpandableListView

Implementaría un CustomAdapter para el Listview extensible. A continuación, sería capaz de establecer tamaños personalizados de acuerdo con el texto en el Listview y sus componentes hijos. En realidad Android maneja esto automáticamente.

Echa un vistazo al código siguiente para la lista expandible:

 public class LineupFragment extends Fragment { View rootView; ExpandableListView lv; private String[] groups; private String[][] children; public LineupFragment() { } public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); groups = new String[] { "Test Header One", "Test Header Two", "Test Header Three", "Test Header Four" }; children = new String [][] { { "s simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum." }, { "Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of comes from a line in section 1.10.32." }, { "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like)." }, { "There are many variations of passages of Lorem Ipsum available, but the majority have suffered alteration in some form, by injected humour, or randomised words which don't look even slightly believable. If you are going to use a passage of Lorem Ipsum, you need to be sure there isn't anything embarrassing hidden in the middle of text. All the Lorem Ipsum generators on the Internet tend to repeat predefined chunks as necessary, making this the first true generator on the Internet. It uses a dictionary of over 200 Latin words, combined with a handful of model sentence structures, to generate Lorem Ipsum which looks reasonable. The generated Lorem Ipsum is therefore always free from repetition, injected humour, or non-characteristic words etc." } }; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { rootView = inflater.inflate(R.layout.fragment_lineup, container, false); return rootView; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); lv = (ExpandableListView) view.findViewById(R.id.expListView); lv.setAdapter(new ExpandableListAdapter(groups, children)); lv.setGroupIndicator(null); } public class ExpandableListAdapter extends BaseExpandableListAdapter { private final LayoutInflater inf; private String[] groups; private String[][] children; public ExpandableListAdapter(String[] groups, String[][] children) { this.groups = groups; this.children = children; inf = LayoutInflater.from(getActivity()); } @Override public int getGroupCount() { return groups.length; } @Override public int getChildrenCount(int groupPosition) { return children[groupPosition].length; } @Override public Object getGroup(int groupPosition) { return groups[groupPosition]; } @Override public Object getChild(int groupPosition, int childPosition) { return children[groupPosition][childPosition]; } @Override public long getGroupId(int groupPosition) { return groupPosition; } @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; } @Override public boolean hasStableIds() { return true; } @Override public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = inf.inflate(R.layout.list_item, parent, false); holder = new ViewHolder(); holder.text = (TextView) convertView.findViewById(R.id.lblListItem); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.text.setText(getChild(groupPosition, childPosition).toString()); return convertView; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = inf.inflate(R.layout.list_group, parent, false); holder = new ViewHolder(); holder.text = (TextView) convertView.findViewById(R.id.lblListHeader); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.text.setText(getGroup(groupPosition).toString()); return convertView; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } private class ViewHolder { TextView text; } } } 

Los diseños xml para los componentes padre e hijo serían similares a los siguientes:

list_group.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:background="#000000"> <ImageView android:id="@+id/photo" android:layout_width="70dp" android:layout_height="70dp" android:contentDescription="@string/app_name" android:fitsSystemWindows="true" /> <TextView android:id="@+id/lblListHeader" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:paddingLeft="6dip" android:paddingTop="6dip" android:textColor="@color/white" android:textSize="20dp" android:textStyle="bold"/> </LinearLayout> 

list_item.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:background="#000000" > <TextView android:id="@+id/lblListItem" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingBottom="5dp" android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft" android:paddingTop="5dp" android:textColor="@color/white" android:textSize="13sp" /> </LinearLayout> 

Espero que esto ayude 🙂