我正在尝试使用复选框创建Expanded List View
,这是设置的内容。
但由于某些原因,它对我不利。
我尝试过很多不同的教程,花了很多时间。但他们似乎都以同样的方式结束。它显示在我的活动上,但它不会扩展或崩溃。
这是我的settings.XML代码:
<ExpandableListView
android:id="@+id/lvExp"
android:layout_height="match_parent"
android:layout_width="match_parent"/>
这是我的父XML代码:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="8dp"
android:background="#000000">
<TextView
android:id="@+id/lblListHeader"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="?
android:attr/expandableListPreferredItemPaddingLeft"
android:textSize="17dp"
android:textColor="#f9f93d" />
</LinearLayout>
这是我的子XML代码:
<?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="55dip"
android:orientation="vertical" >
<TextView
android:id="@+id/lblListItem"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="17dip"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:paddingLeft="?
android:attr/expandableListPreferredChildPaddingLeft" />
</LinearLayout>
这是我的可扩展列表适配器
package com.example.edonfreiner.siddur;
import java.util.HashMap;
import java.util.List;
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String>
listDataHeader,
HashMap<String, List<String>>
listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return
this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView,
ViewGroup parent) {
final String childText = (String) getChild(groupPosition,
childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return
this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
return true;
}
}
到目前为止,我甚至可以让它工作,更不用说在其中放置复选框了,我希望这更容易。
答案 0 :(得分:0)
我已经意识到当ExpandableListView的子节点是可聚焦的(比如Button,Checkbox)时,你需要设置(在你的子元素上):
students | classes
-----------+----------------
Paige | Calculus
Pajak | Calculus
Pajak | Yoga
Pamela | Calculus
Pamela | Cooking Pasta
Pamela | Football
Pamela | Singing
Pamela | Yoga
Parker | English
Parker | Fruit
Parker | Social Studies
这是因为这些子元素会从您的触摸中窃取焦点,这意味着扩展列表视图。
这是我Android ExpandableListView not expanding问题的答案,这似乎对少数人有所帮助。
编辑可聚焦属性表示窗口小部件可以获得与点击不同的焦点(按钮,复选框等等)
答案 1 :(得分:0)
我认为这可能是两个问题之一:要么getChildrenCount方法返回0,要么某个视图正在获得焦点。尝试在父XML的容器布局中使用此代码:
$orders = Order::whereHas('lastStatus', function ($query) use ($statuses) {
$query->whereIn('OrderStautsNames.id', $statuses);
})->get();