标签：p2p telent 指示器 size draw return touch match child
新建主界面 xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity"> <ExpandableListView android:id="@+id/expandablelistview" android:layout_width="match_parent" android:layout_height="match_parent"> </ExpandableListView> </LinearLayout>
新建一级目录xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#FFFFFF"> <TextView android:layout_width="48dp" android:layout_height="16dp" android:text="第一关" android:textColor="#ff777777" android:textSize="16dp" /> </LinearLayout>
新建二级目录xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical"> <ImageView android:layout_width="29.2dp" android:layout_height="25.4dp" android:src="@mipmap/z_dialog1_dianshi"/> <TextView android:layout_marginLeft="10dp" android:id="@+id/text1" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="内容" android:textSize="14dp" android:gravity="center_vertical" android:textColor="#ff777777" /> </LinearLayout>
编写适配器
package com.rhkj.zhihuixue.activity.zhijizhiyi.adapter; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.TextView; import com.rhkj.zhihuixue.R; import java.util.List; /** * @ClassName HotelEntityAdapter * @Description TODO * @Author ZhangXueTao * @Date 2020/10/27 14:44 * @Version 1.0 模板 */ public class HotelEntityAdapter extends BaseExpandableListAdapter { List<String> mGroupList;//一级List List<List<String>> mChildList;//二级List 注意!这里是List里面套了一个List<String>,实际项目你可以写一个pojo类来管理2层数据 public HotelEntityAdapter(List<String> groupList, List<List<String>> childList){ mGroupList = groupList; mChildList = childList; } @Override public int getGroupCount() {//返回第一级List长度 return mGroupList.size(); } @Override public int getChildrenCount(int groupPosition) {//返回指定groupPosition的第二级List长度 return mChildList.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) {//返回一级List里的内容 return mGroupList.get(groupPosition); } @Override public Object getChild(int groupPosition, int childPosition) {//返回二级List的内容 return mChildList.get(groupPosition).get(childPosition); } @Override public long getGroupId(int groupPosition) {//返回一级View的id 保证id唯一 return groupPosition; } @Override public long getChildId(int groupPosition, int childPosition) {//返回二级View的id 保证id唯一 return groupPosition + childPosition; } /** * 指示在对基础数据进行更改时子ID和组ID是否稳定 * @return */ @Override public boolean hasStableIds() { return true; } /** * 返回一级父View */ @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.z_exlist_one_item, parent,false); // ((TextView)convertView).setText((String)getGroup(groupPosition)); return convertView; } /** * 返回二级子View */ @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.text_item, parent,false); // ((TextView)convertView).setText((String)getChild(groupPosition,childPosition)); return convertView; } /** * 指定位置的子项是否可选 */ @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } }
package com.rhkj.zhihuixue.activity.zhijizhiyi; import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.os.Bundle; import android.view.View; import android.widget.ExpandableListView; import android.widget.Toast; import com.rhkj.zhihuixue.R; import com.rhkj.zhihuixue.activity.zhijizhiyi.adapter.HotelEntityAdapter; import com.rhkj.zhihuixue.base.app.ZBaseLandscapeActivity; import java.util.ArrayList; import java.util.List; import butterknife.BindView; public class MainActivity2 extends ZBaseLandscapeActivity { @BindView(R.id.expandablelistview) ExpandableListView expandablelistview; private HotelEntityAdapter mAdapter; @Override public int getLayoutId() { return R.layout.activity_main2; } @Override public void initPresenter() { } @Override public void initView() { List<String> groupList = new ArrayList<>(); groupList.add("一"); groupList.add("二"); groupList.add("三"); List<List<String>> childList = new ArrayList<>(); List<String> childList1 = new ArrayList<>(); childList1.add("1"); childList1.add("1"); childList1.add("1"); List<String> childList2 = new ArrayList<>(); childList2.add("2"); childList2.add("2"); childList2.add("2"); List<String> childList3 = new ArrayList<>(); childList3.add("3"); childList3.add("3"); childList3.add("3"); childList.add(childList1); childList.add(childList2); childList.add(childList3); mAdapter = new HotelEntityAdapter(groupList, childList); expandablelistview.setAdapter(mAdapter); expandablelistview.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {//一级点击监听 @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { //如果你处理了并且消费了点击返回true,这是一个基本的防止onTouch事件向下或者向上传递的返回机制 return false; } }); expandablelistview.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {//二级点击监听 @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { //如果你处理了并且消费了点击返回true return false; } }); } }
android:dividerHeight="20dp" 设置item间距高度,注意设置这个间距包括了一级和二级
android:divider="@color/colorRed1" 设置一级间距颜色
android:childDivider="@color/colorGreen" 设置二级间距颜色
android:childIndicator：显示在子列表旁边的Drawable对象，可以是一个图像
android:childIndicatorEnd：子列表项指示符的结束约束位置
android:childIndicatorLeft：子列表项指示符的左边约束位置
android:childIndicatorRight：子列表项指示符的右边约束位置
android:childIndicatorStart：子列表项指示符的开始约束位置
android:groupIndicator：显示在组列表旁边的Drawable对象，可以是一个图像
android:indicatorEnd：组列表项指示器的结束约束位置
android:indicatorLeft：组列表项指示器的左边约束位置
android:indicatorRight：组列表项指示器的右边约束位置
android:indicatorStart：组列表项指示器的开始约束位置
1. 扩展BaseExpandableListAdpter实现ExpandableAdapter。
2. 使用SimpleExpandableListAdpater将两个List集合包装成ExpandableAdapter
3. 使用simpleCursorTreeAdapter
mExpandableListView.collapseGroup(position); 收起指定位置组的二级列表
mExpandableListView.expandGroup(position); 展开指定位置组的二级列表
mExpandableListView.isGroupExpanded(position); 指定位置的组是否展开
mExpandableListView.setSelectedGroup(position); 将指定位置的组设置为置顶
int width = getResources().getDisplayMetrics().widthPixels;
mExpandableListView.setIndicatorBounds(width - UnitConversionUtil.dip2px(this,40)
, width - UnitConversionUtil.dip2px(this,15));//设置图标位置
如果你在适配器里去实现了Group的点击事件想用回调方法回调出去(如下代码),这个时候你就会碰到一个Group无法展开和收起的坑,原因很简单因为这里已经把点击事件消费了,点击不在继续向下传递,所以底层实现的展开和收起不执行了
/**
* 返回一级父View
*/
@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, final ViewGroup parent) {
convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
return convertView;
}
那么如何解决呢?
不用setOnClickListener(),因为这个会消费事件,我们改用setOnTouchListener,如下代码:
convertView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
//实现你自己的接口回调
}
return false;
}
});
这里有一点需要注意ACTION_DOWN 需要返回false,因为底层是消费ACTION_DOWN的来展开和收起的....
将groupPosition回调到外面后使用collapseGroup() 或者 expandGroup()方法实现.
标签：p2p telent 指示器 size draw return touch match child
原文地址：https://www.cnblogs.com/zhangxuetao/p/13885100.html
