仿QQ好友下拉条demo

package cn.nedu.exlistview; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.AbsListView; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; public class ExListView extends Activity { private static final String G_TEXT = "g_text"; private static final String C_TEXT1 = "c_text1"; private static final String C_TEXT2 = "c_text1"; List<Map<String, String>> groupData = new ArrayList<Map<String, String>>(); List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>(); ExAdapter adapter; ExpandableListView exList; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); for (int i = 0; i < 3; i++) { Map<String, String> curGroupMap = new HashMap<String, String>(); groupData.add(curGroupMap); curGroupMap.put(G_TEXT, "Group " + i); List<Map<String, String>> children = new ArrayList<Map<String, String>>(); for (int j = 0; j < 5; j++) { Map<String, String> curChildMap = new HashMap<String, String>(); children.add(curChildMap); curChildMap.put(C_TEXT1, "Child " + j); curChildMap.put(C_TEXT2, "Child " + j); } childData.add(children); } adapter=new ExAdapter(ExListView.this); exList = (ExpandableListView) findViewById(R.id.list); exList.setAdapter(adapter); exList.setGroupIndicator(null); exList.setDivider(null); } class ExAdapter extends BaseExpandableListAdapter { ExListView exlistview; public ExAdapter(ExListView elv) { super(); exlistview = elv; } public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(R.layout.member_listview, null); } TextView title = (TextView) view.findViewById(R.id.content_001); title.setText(getGroup(groupPosition).toString()); ImageView image=(ImageView) view.findViewById(R.id.tubiao); if(isExpanded) image.setBackgroundResource(R.drawable.btn_browser2); else image.setBackgroundResource(R.drawable.btn_browser); return view; } public long getGroupId(int groupPosition) { return groupPosition; } public Object getGroup(int groupPosition) { return groupData.get(groupPosition).get(G_TEXT).toString(); } public int getGroupCount() { return groupData.size(); } //************************************** public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(R.layout.member_childitem, null); } final TextView title = (TextView) view.findViewById(R.id.child_text); title.setText(childData.get(groupPosition).get(childPosition).get(C_TEXT1).toString()); final TextView title2 = (TextView) view.findViewById(R.id.child_text2); title2.setText(childData.get(groupPosition).get(childPosition).get(C_TEXT2).toString()); return view; } public long getChildId(int groupPosition, int childPosition) { return childPosition; } public Object getChild(int groupPosition, int childPosition) { return childData.get(groupPosition).get(childPosition).get(C_TEXT1).toString(); } public int getChildrenCount(int groupPosition) { return childData.get(groupPosition).size(); } //************************************** public boolean hasStableIds() { return true; } public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } } }