ExpandableListView group和child的item间距设置以及多种布局等问题的解决

短命女 2022-05-29 06:58 434阅读 0赞

一、ExpandableListView中group和child的item之间的间距可以通过xml来配置，如下：

这样配置的话，会发现group和child的item之间的间距均为10dp，但是有时候我们需要group和child的item之间的间距设置为不一样的值，这个时候就不能单纯的通过配置xml来解决，解决方法如下：

a、配置expandablelistview

b、配置group layout

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="55dp"
        android:minHeight="55dp">
    
        <RelativeLayout
            android:id="@+id/lay"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:layout_alignParentBottom="true"
            android:background="@drawable/shape_login_edit"
            android:paddingLeft="12dp"
            android:paddingRight="12dp">
    
            <TextView
                android:id="@+id/key"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_centerVertical="true"
                android:text="@string/inverter_data_rated_power"
                android:textColor="@color/white"
                android:textSize="16sp" />
    
            <TextView
                android:id="@+id/value"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_centerVertical="true"
                android:text="5KW"
                android:textColor="@color/white"
                android:textSize="16sp" />
    
        </RelativeLayout>
    
    
    </RelativeLayout>

通过控制group item的padding或者margin，来改变group item之间的间距，10dp。

c、配置child layout

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/lay"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:background="@drawable/shape_login_edit_all"
        android:minHeight="45dp"
        android:paddingLeft="12dp"
        android:paddingRight="12dp">
    
        <TextView
            android:id="@+id/key"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true"
            android:text="@string/inverter_data_rated_power"
            android:textColor="@color/white"
            android:textSize="16sp" />
    
        <TextView
            android:id="@+id/value"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:text="5KW"
            android:textColor="@color/white"
            android:textSize="16sp" />
    
    </RelativeLayout>

通过控制child item的padding或者margin，来改变child item之间的间距，0dp。

二、Expandablelistview 多种布局问题的解决

Listview多布局要求adapter必须实现以下两个函数：

1、getViewTypeCount():该方法返回多少个不同的布局。

2、getItemViewType(int position):根据数据列表的position返回需要展示的layout的对应的type。 type的值必须从0开始。

Expandablelistview多布局同样要求adapter必须实现以下两个函数：

1、getGroupTypeCount()

2、getGroupType(int groupPosition)

package com.invt.imarsphoneexpert.remote.adapter;
    
    import android.content.Context;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseExpandableListAdapter;
    import android.widget.ImageView;
    import android.widget.RelativeLayout;
    import android.widget.TextView;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /** * Created by xl on 2018/3/15. */ public class RemoteInverterInfoAdapter extends BaseExpandableListAdapter {
    
        private Context mContext;
        private List<NameValueStatus> mList;
        private LayoutInflater mInflater;
    
        private final int VIEW_TYPE = 2;
        private final int VIEW_TYPE_1 = 0;
        private final int VIEW_TYPE_2 = 1;
    
        public RemoteInverterInfoAdapter(Context context) {
            this.mContext = context;
            this.mList = new ArrayList<NameValueStatus>();
            this.mInflater = LayoutInflater.from(context);
        }
    
        public RemoteInverterInfoAdapter(Context context, List<NameValueStatus> list) {
            this.mContext = context;
            this.mList = list;
            this.mInflater = LayoutInflater.from(context);
        }
    
        @Override
        public int getGroupCount() {
            if (mList != null) {
                return mList.size();
            }
            return 0;
        }
    
        @Override
        public int getChildrenCount(int groupPosition) {
            if (mList != null && mList.get(groupPosition).getList() != null) {
                return mList.get(groupPosition).getList().size();
            }
            return 0;
        }
    
        @Override
        public Object getGroup(int groupPosition) {
            if (mList != null) {
                return mList.get(groupPosition);
            }
            return null;
        }
    
        @Override
        public Object getChild(int groupPosition, int childPosition) {
            if (mList != null && mList.get(groupPosition).getList() != null) {
                return mList.get(groupPosition).getList().get(childPosition);
            }
            return null;
        }
    
        @Override
        public long getGroupId(int groupPosition) {
            return groupPosition;
        }
    
        @Override
        public long getChildId(int groupPosition, int childPosition) {
            return childPosition;
        }
    
        @Override
        public boolean hasStableIds() {
            return true;
        }
    
        @Override
        public int getGroupType(int groupPosition) {
            if (groupPosition == 3 || groupPosition == 4) {
                return VIEW_TYPE_2;
            }
            return VIEW_TYPE_1;
        }
    
        @Override
        public int getGroupTypeCount() {
            return VIEW_TYPE;
        }
    
        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            GroupViewHold group = null;
            int type = getGroupType(groupPosition);
            if (convertView == null) {
                group = new GroupViewHold();
                switch (type) {
                    case VIEW_TYPE_1:
                        convertView = mInflater.inflate(R.layout.row_inverter_info1, null);
                        group.value = (TextView) convertView.findViewById(R.id.value);
                        break;
                    case VIEW_TYPE_2:
                        convertView = mInflater.inflate(R.layout.row_inverter_info2, null);
                        group.indicator = (ImageView) convertView.findViewById(R.id.img);
                        break;
                }
                group.key = (TextView) convertView.findViewById(R.id.key);
                group.lay = (RelativeLayout) convertView.findViewById(R.id.lay);
                //设置tag
                convertView.setTag(group);
            } else {
                group = (GroupViewHold) convertView.getTag();
            }
            //设置控件
            group.key.setText(mList.get(groupPosition).getName());
            if (type == VIEW_TYPE_1) {
                group.value.setText(mList.get(groupPosition).getValue());
            } else {
                if (isExpanded) {
                    group.indicator.setImageResource(R.drawable.remote_close);
                    group.lay.setBackgroundResource(R.drawable.shape_login_edit_up);
                } else {
                    group.indicator.setImageResource(R.drawable.remote_open);
                    group.lay.setBackgroundResource(R.drawable.shape_login_edit);
                }
            }
            return convertView;
        }
    
        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            ChildViewHold child = null;
            if (convertView == null) {
                child = new ChildViewHold();
                convertView = mInflater.inflate(R.layout.row_inverter_info_item, null);
                //查找控件
                child.key = (TextView) convertView.findViewById(R.id.key);
                child.value = (TextView) convertView.findViewById(R.id.value);
                child.lay = (RelativeLayout) convertView.findViewById(R.id.lay);
                //设置tag
                convertView.setTag(child);
            } else {
                child = (ChildViewHold) convertView.getTag();
            }
            //设置控件
            if (getGroupType(groupPosition) == VIEW_TYPE_2) {
                child.key.setText(mList.get(groupPosition).getList().get(childPosition).getName());
                child.value.setText(mList.get(groupPosition).getList().get(childPosition).getValue());
            }
            if (childPosition == mList.get(groupPosition).getList().size() - 1) {
                child.lay.setBackgroundResource(R.drawable.shape_login_edit_down);
            }
            return convertView;
        }
    
        @Override
        public boolean isChildSelectable(int i, int i1) {
            return true;
        }
    
        static class GroupViewHold {
            private RelativeLayout lay;
            private ImageView indicator;
            private TextView key;
            private TextView value;
        }
    
        static class ChildViewHold {
            private RelativeLayout lay;
            private TextView key;
            private TextView value;
        }
    
        /** * 更新列表 * * @param list */ public void updateList(List<NameValueStatus> list) {
            this.mList.clear();
            this.mList.addAll(list);
            this.notifyDataSetChanged();
        }
    
        /** * 获取列表 * * @return */ public List<NameValueStatus> getList() {
            return mList;
        }
    
        /** * 刷新 */ public void updateList() {
            this.notifyDataSetChanged();
        }
    }

三、listview和expandablelistview头部设置

头部lay\_inverter\_head1

<?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="150dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:orientation="horizontal"
        android:weightSum="5">
    
        ……
    
    </LinearLayout>

设置头部

//设置listView头部
    mViewHeader = View.inflate(mActivity, R.layout.lay_inverter_head1, null);
    mListView.addHeaderView(mViewHeader);

完！！！