[ 转]Android ExpandableList 可折叠列表视图 学习之一

本文转自：http://blog.sina.com.cn/s/blog_5033827f0100mkqu.html

在Android开发的过程中，大家希望能实现可折叠列表视图

 

1.list.xml 源码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:background="@color/background_color"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
 <RelativeLayout
  android:id="@+id/expandable_relative_layout"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:gravity="center_horizontal"
  >
  <TextView
      android:id="@+id/list_title_text"
   android:textSize="22.0sp"
   android:textColor="@color/line_black"
   android:text="可扩展LISTVIEW学习"
   android:ellipsize="marquee"
   android:gravity="center_horizontal"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:singleLine="true"
   >
  </TextView>
 </RelativeLayout>
 <ExpandableListView
  android:id="@+id/expandable_list_view"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:drawSelectorOnTop="false"
  android:cacheColorHint="#00000000"
  android:dividerHeight="1.0dip"
  android:layout_below="@+id/expandable_relative_layout"
  >
 </ExpandableListView
>
</RelativeLayout>

注:去除GroupView自带折叠打开图片

添加android:groupIndicator="@null"

 <ExpandableListView

  android:groupIndicator="@null"
  android:id="@+id/expandable_list_view"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:drawSelectorOnTop="false"
  android:cacheColorHint="#00000000"
  android:dividerHeight="1.0dip"
  android:layout_below="@+id/expandable_relative_layout"
  >

2.源代码

package com.android.expand;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ExpandableListView.ExpandableListContextMenuInfo;

public class ExpandableList1 extends Activity {
 public final static String tag = "ExpandableList1";

 public final static String NAME = "姓名:";
 public final static String PHONE = "电话:";
 public final static String SEX = "性别:";

 private ExpandableListView listView;
 private TextView mTitle;

 public List<String> group;
 public List<List<String>> child;

 public ExpandInfoAdapter adapter;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  setContentView(R.layout.list);

  findView();

  initListView();

  setListViewOnChildClickListener();

  // 注册长按选项弹出莱单
  registerForContextMenu(listView);
 }

 public void findView() {
  listView = (ExpandableListView) findViewById(R.id.expandable_list_view);
  mTitle = (TextView) this.findViewById(R.id.list_title_text);
 }

 public void initListView() {
  initialOther();

  addItemByValue("张三", "051782214", "男");
  addItemByValue("李四", "110", "男");
  addItemByValue("王二", "132", "女");
  addItemByValue("麻子", "13321234562", "女");

  adapter = new ExpandInfoAdapter(this);
  listView.setAdapter(adapter);
 }

 public void setListViewOnChildClickListener() {
  listView
    .setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
     public boolean onChildClick(ExpandableListView parent,
       View v, int groupPosition, int childPosition,
       long id) {
      Logs.i(tag, "groupPosition:" + groupPosition);
      Logs.i(tag, "childPosition:" + childPosition);
      Logs.i(tag, "id:" + id);

      return true;
     }
    });
 }

 public void initialOther() {
  group = new ArrayList<String>();
  child = new ArrayList<List<String>>();
 }

 public void addItemByValue(String n, String c1, String c2) {
  group.add(n);

  List<String> item = new ArrayList<String>();

  item.add(NAME + n);
  item.add(PHONE + c1);
  item.add(SEX + c2);

  child.add(item);
 }

 public class ExpandInfoAdapter extends BaseExpandableListAdapter {
  LayoutInflater mInflater;
  Bitmap mIcon1;
  Activity activity;

  public ExpandInfoAdapter(Activity a) {
   activity = a;
   mInflater = LayoutInflater.from(activity);

   mIcon1 = BitmapFactory.decodeResource(activity.getResources(),
     R.drawable.icon48x48_1);
  }

  // ++++++++++++++++++++++++++++++++++++++++++++
  // child's stub

  @Override
  public Object getChild(int groupPosition, int childPosition) {
   return child.get(groupPosition).get(childPosition);
  }

  @Override
  public long getChildId(int groupPosition, int childPosition) {
   return childPosition;
  }

  @Override
  public int getChildrenCount(int groupPosition) {
   return child.get(groupPosition).size();
  }

  @Override
  public View getChildView(int groupPosition, int childPosition,
    boolean isLastChild, View convertView, ViewGroup parent) {
   // return
   // getChildViewStub(child.get(groupPosition).get(childPosition)
   // .toString());
   return getView(groupPosition, childPosition, convertView, parent);
  }

  public TextView getChildViewStub(String s) {
   // Layout parameters for the ExpandableListView
   AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
     ViewGroup.LayoutParams.FILL_PARENT, 64);

   TextView text = new TextView(activity);
   text.setLayoutParams(lp);
   text.setTextSize(20);
   text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
   text.setPadding(36, 0, 0, 0);
   text.setText(s);
   return text;
  }

  public View getView(int groupPosition, int childPosition,
    View convertView, ViewGroup parent) {
   ViewHolder holder;

   if (convertView == null) {
    convertView = mInflater.inflate(R.layout.list_item_icon_text,
      null);

    holder = new ViewHolder();
    holder.text = (TextView) convertView.findViewById(R.id.text);
    holder.icon = (ImageView) convertView.findViewById(R.id.icon);

    convertView.setTag(holder);
   } else {
    holder = (ViewHolder) convertView.getTag();
   }
   String name = child.get(groupPosition).get(childPosition);
   holder.text.setText(name);
   holder.icon.setImageBitmap(mIcon1);

   return convertView;
  }

  // ++++++++++++++++++++++++++++++++++++++++++++
  // group's stub

  @Override
  public Object getGroup(int groupPosition) {
   return group.get(groupPosition);
  }

  @Override
  public int getGroupCount() {
   return group.size();
  }

  @Override
  public long getGroupId(int groupPosition) {
   return groupPosition;
  }

  @Override
  public View getGroupView(int groupPosition, boolean isExpanded,
    View convertView, ViewGroup parent) {
   return getGroupViewStub(getGroup(groupPosition).toString());
  }

  public TextView getGroupViewStub(String s) {
   // Layout parameters for the ExpandableListView
   AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
     ViewGroup.LayoutParams.FILL_PARENT, 64);

   TextView text = new TextView(activity);
   text.setLayoutParams(lp);
   text.setTextSize(20);
   text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
   text.setPadding(36, 0, 0, 0);
   text.setText(s);
   return text;
  }

  // Indicate whether Group is Expanded or Collapsed
  public void onGroupExpanded(int groupPosition) {
  }

  public void onGroupCollapsed(int groupPosition) {
  }

  @Override
  public boolean isChildSelectable(int groupPosition, int childPosition) {
   return true;
  }

  @Override
  public boolean hasStableIds() {
   return false;
  }

 }

 static class ViewHolder {
  TextView text;
  ImageView icon;
 }

 @Override
 public void onCreateContextMenu(ContextMenu menu, View v,
   ContextMenuInfo menuInfo) {
  menu.setHeaderTitle("Sample menu");
  menu.add(0, 0, 0, "menu1 order0");
  menu.add(0, 0, 1, "menu2 order1");
  menu.add(0, 1, 1, "menu3 item1");
  menu.add(1, 1, 1, "menu4 group1");
 }

 @Override
 public boolean onContextItemSelected(MenuItem item) {
  Logs.i(tag, "GroupID" + item.getGroupId() + ", itemId :"
    + item.getItemId() + " order :" + item.getOrder());

  ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item
    .getMenuInfo();

  int type = ExpandableListView
    .getPackedPositionType(info.packedPosition);

  if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
   String title = ((ViewHolder) info.targetView.getTag()).text
     .getText().toString();
   int groupPos = ExpandableListView
     .getPackedPositionGroup(info.packedPosition);
   int childPos = ExpandableListView
     .getPackedPositionChild(info.packedPosition);
   Toast.makeText(
     this,
     title + ": Child " + childPos + " clicked in group"
       + groupPos, Toast.LENGTH_SHORT).show();
   return true;
  } else if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
   String titles = ((TextView) info.targetView).getText().toString();
   int groupPos = ExpandableListView
     .getPackedPositionGroup(info.packedPosition);
   Toast.makeText(this, titles + ": Group " + groupPos + " clicked",
     Toast.LENGTH_SHORT).show();
   return true;
  }

  return false;
 }

}

注:控制点击groupview不展开childView方法

expandListView
    .setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
     @Override
     public boolean onGroupClick(ExpandableListView parent,
       View v, int groupPosition, long childPosition) {

      Toast.makeText(
        EmailExpandListActivity.this,
        "[Group Click]:" + groupPosition + " isEmpty :"
          + child.get(groupPosition).isEmpty(),
        Toast.LENGTH_SHORT).show();

      
      if (groupPosition == 0) { 

          return true;
      } else if (child.get(groupPosition).isEmpty()) {// isEmpty没有

         return true;
      } else {
       return false;
      }
     }
    });