Mega Code Archive
Using ExpandableListView
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package app.test;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ExpandableListView;
import android.content.Context;
import android.graphics.Typeface;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
public class Test extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ExpandableListView list = new ExpandableListView(this);
list.setGroupIndicator(null);
list.setChildIndicator(null);
String[] titles = {"A","B","C"};
String[] fruits = {"a1","a2"};
String[] veggies = {"b1","b2","b3"};
String[] meats = {"c1","c2"};
String[][] contents = {fruits,veggies,meats};
SimplerExpandableListAdapter adapter = new SimplerExpandableListAdapter(this,
titles, contents);
list.setAdapter(adapter);
setContentView(list);
}
}
class SimplerExpandableListAdapter extends BaseExpandableListAdapter {
private Context mContext;
private String[][] mContents;
private String[] mTitles;
public SimplerExpandableListAdapter(Context context, String[] titles, String[][] contents) {
super();
if(titles.length != contents.length) {
throw new IllegalArgumentException("Titles and Contents must be the same size.");
}
mContext = context;
mContents = contents;
mTitles = titles;
}
@Override
public String getChild(int groupPosition, int childPosition) {
return mContents[groupPosition][childPosition];
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
TextView row = (TextView)convertView;
if(row == null) {
row = new TextView(mContext);
}
row.setText(mContents[groupPosition][childPosition]);
return row;
}
@Override
public int getChildrenCount(int groupPosition) {
return mContents[groupPosition].length;
}
@Override
public String[] getGroup(int groupPosition) {
return mContents[groupPosition];
}
@Override
public int getGroupCount() {
return mContents.length;
}
@Override
public long getGroupId(int groupPosition) {
return 0;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
TextView row = (TextView)convertView;
if(row == null) {
row = new TextView(mContext);
}
row.setTypeface(Typeface.DEFAULT_BOLD);
row.setText(mTitles[groupPosition]);
return row;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
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