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;
}
}
});
