ExpandableList仿QQ聊天下拉列表

package com.eyu.activity_test; import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.AbsListView; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.ExpandableListView.OnChildClickListener; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class ExpandableList extends Activity{ protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); final ExpandableListAdapter adapter = new BaseExpandableListAdapter() { //设置组视图的图片 int[] logos = new int[] { R.drawable.wei, R.drawable.shu,R.drawable.wu}; //设置组视图的显示文字 private String[] generalsTypes = new String[] { "魏", "蜀", "吴" }; //子视图显示文字 private String[][] generals = new String[][] { { "夏侯惇", "甄姬", "许褚", "郭嘉", "司马懿", "杨修" }, { "马超", "张飞", "刘备", "诸葛亮", "黄月英", "赵云" }, { "吕蒙", "陆逊", "孙权", "周瑜", "孙尚香" } }; //子视图图片 public int[][] generallogos = new int[][] { { R.drawable.xiahoudun, R.drawable.zhenji, R.drawable.xuchu, R.drawable.guojia, R.drawable.simayi, R.drawable.yangxiu }, { R.drawable.machao, R.drawable.zhangfei, R.drawable.liubei, R.drawable.zhugeliang, R.drawable.huangyueying, R.drawable.zhaoyun }, { R.drawable.lvmeng, R.drawable.luxun, R.drawable.sunquan, R.drawable.zhouyu, R.drawable.sunshangxiang } }; //自己定义一个获得文字信息的方法 TextView getTextView() { AbsListView.LayoutParams lp = new AbsListView.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT, 64); TextView textView = new TextView( ExpandableList.this); textView.setLayoutParams(lp); textView.setGravity(Gravity.CENTER_VERTICAL); textView.setPadding(36, 0, 0, 0); textView.setTextSize(20); textView.setTextColor(Color.BLACK); return textView; } //重写ExpandableListAdapter中的各个方法 @Override public int getGroupCount() { // TODO Auto-generated method stub return generalsTypes.length; } @Override public Object getGroup(int groupPosition) { // TODO Auto-generated method stub return generalsTypes[groupPosition]; } @Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return groupPosition; } @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return generals[groupPosition].length; } @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub return generals[groupPosition][childPosition]; } @Override public long getChildId(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childPosition; } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return true; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { // TODO Auto-generated method stub LinearLayout ll = new LinearLayout( ExpandableList.this); ll.setOrientation(0); ImageView logo = new ImageView(ExpandableList.this); logo.setImageResource(logos[groupPosition]); logo.setPadding(50, 0, 0, 0); ll.addView(logo); TextView textView = getTextView(); textView.setTextColor(Color.BLACK); textView.setText(getGroup(groupPosition).toString()); ll.addView(textView); return ll; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { // TODO Auto-generated method stub LinearLayout ll = new LinearLayout( ExpandableList.this); ll.setOrientation(0); ImageView generallogo = new ImageView( ExpandableList.this); generallogo .setImageResource(generallogos[groupPosition][childPosition]); ll.addView(generallogo); TextView textView = getTextView(); textView.setText(getChild(groupPosition, childPosition) .toString()); ll.addView(textView); return ll; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; } }; ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.list); expandableListView.setAdapter(adapter); //设置item点击的监听器 expandableListView.setOnChildClickListener(new OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { Toast.makeText( ExpandableList.this, "你点击了" + adapter.getChild(groupPosition, childPosition), Toast.LENGTH_SHORT).show(); return false; } }); } }