android 三级级联筛选列表，写给程序员的Flutter详细教程

android:groupIndicator="@null"

android:scrollbars=“none” />

activity中核心代码

//一级

mViewPager = findViewById(R.id.category_viewpager);

LayoutInflater inflater = LayoutInflater.from(this);

view1 = inflater.inflate(R.layout.target_first_parger, null);

view2 = inflater.inflate(R.layout.target_second_parger, null);

mFirstListView = view1.findViewById(R.id.target_first_lv);

mSecondListView = view2.findViewById(R.id.target_second_exl);

mFirstAdapter = new TargetCategoryFirstAdapter(this, firstBeans);

mFirstAdapter.setSelectedBackgroundResource(R.drawable.select_white);//选中时

mFirstAdapter.setHasDivider(false);

mFirstAdapter.setNormalBackgroundResource(R.color.target_bg_gray);//未选中

mFirstListView.setAdapter(mFirstAdapter);

views.add(view1);

views.add(view2);//加载了一二级菜单

mViewPager.setAdapter(new MyPagerAdapter(views));

初始化数据及点击事件部分

private void initSelectCategory(CategoryBean bean) {

if (bean != null && bean.getData() != null) {

firstBeans = bean.getData();

}

FirstBean fBean = new FirstBean();

fBean.setName(“全部”);

fBean.setType(“0”);

fBean.setItems(new ArrayList());

fBean.setSelect(true);

firstBeans.add(0, fBean);

if (mFirstAdapter == null) {

mFirstAdapter = new TargetCategoryFirstAdapter(TargetFilterActivity.this, firstBeans);

mSecondListView.setAdapter(mSecondAdapter);

} else {

mFirstAdapter.setData(firstBeans);

}

mFirstListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

FirstBean firstBean = firstBeans.get(position);

for (int i = 0; i < firstBeans.size(); i++) {

if (i == position) {

firstBeans.get(i).setSelect(true);

} else {

firstBeans.get(i).setSelect(false);

}

if (mFirstAdapter == null) {

mFirstAdapter = new TargetCategoryFirstAdapter(TargetFilterActivity.this, firstBeans);

mSecondListView.setAdapter(mSecondAdapter);

} else {

mFirstAdapter.setData(firstBeans);

}

if (firstBean.getType().equals(“0”)) {//不限

if (mSecondAdapter != null) {

mSecondAdapter.setData(new ArrayList());

mSecondAdapter.notifyDataSetChanged();

}

} else {

mSecondList = firstBean.getItems();

for (int i = 0; i < mSecondList.size(); i++) {

mSecondList.get(i).setIsSelect(false);

for (int j = 0; j < mSecondList.get(i).getItems().size(); j++) {

mSecondList.get(i).getItems().get(j).setIsSelect(false);

}

if (mSecondAdapter == null) {

mSecondAdapter = new TargetCategorySecondAdapter(TargetFilterActivity.this, mSecondList);

mSecondListView.setAdapter(mSecondAdapter);

} else {

mSecondAdapter.setData(mSecondList);

}

String secondType = firstBean.getType();

String secondName = firstBean.getName();

if (secondType.equals("-1")) {

mProjectType = mFirstProjectType;

mProjectTypeName = mFirstProjectTypeName;

} else {

mProjectType = mFirstProjectType + “/” + secondType;

mProjectTypeName = mFirstProjectTypeName + “/” + secondName;

}

//默认全部展开

for (int i = 0; i < mSecondList.size(); i++) {

if (mSecondListView != null) {

mSecondListView.expandGroup(i);

}

});

//二级

mSecondListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

@Override

public boolean onGroupClick(ExpandableListView expandableListView, View view, int groupPosition, long l) {

for (int i = 0; i < mSecondList.size(); i++) {

if (i == groupPosition) {

mSecondList.get(i).setIsSelect(true);

} else {

mSecondList.get(i).setIsSelect(false);

}

for (int j = 0; j < mSecondList.get(i).getItems().size(); j++) {

mSecondList.get(i).getItems().get(j).setIsSelect(false);

}

String thirdType = mSecondList.get(groupPosition).getType();

String thirdName = mSecondList.get(groupPosition).getName();

mProjectType = mFirstProjectType + “/” + thirdType;

mProjectTypeName = mFirstProjectTypeName + “/” + thirdName;

mSecondAdapter.setData(mSecondList);

return true;

}

});

mSecondListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

@Override

public boolean onChildClick(ExpandableListView expandableListView, View view, int groupPosition, int childPosition, long l) {

for (int i = 0; i < mSecondList.size(); i++) {

if (i == groupPosition) {

mSecondList.get(i).setIsSelect(true);

} else {

mSecondList.get(i).setIsSelect(false);

}

List<SecondBean.ThirdBean> thirdList = mSecondList.get(i).getItems();

for (int j = 0; j < thirdList.size(); j++) {

if (i == groupPosition && j == childPosition) {

thirdList.get(j).setIsSelect(true);

} else {

thirdList.get(j).setIsSelect(false);

}

String thirdType = mSecondList.get(groupPosition).getType();

String thirdName = mSecondList.get(groupPosition).getName();

String fourType = mSecondList.get(groupPosition).getItems().get(childPosition).getType();

String fourName = mSecondList.get(groupPosition).getItems().get(childPosition).getName();

mProjectType = mFirstProjectType + “/” + thirdType + “/” + fourType;//工程类型id

mProjectTypeName = mFirstProjectTypeName + “/” + thirdName + “/” + fourName;//工程名称前端显示

mSecondAdapter.setData(mSecondList);

return false;

}

});

}

MyViewPager

package com.jky.mobile_gczjjc.widget;

import android.content.Context;

import android.support.v4.view.ViewPager;

import android.util.AttributeSet;

/**

Created by LaiYingtang on 2016/5/22.
主页面左右滑动

public class MyViewPager extends ViewPager {

public MyViewPager(Context context, AttributeSet attrs) {

super(context, attrs);

}

public MyViewPager(Context context) {

super(context);

}

//判断menu在x,y的位置

public void scrollTo(int x,int y){

if(getAdapter()==null||x>getWidth()*(getAdapter().getCount()-2)){

return;

}

super.scrollTo(x,y);

}

TargetCategoryFirstAdapter

package com.jky.mobile_gczjjc.adapter;

import android.content.Context;

import android.graphics.Color;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.TextView;

import com.jky.mobile_gczjjc.R;

import com.jky.mobile_gczjjc.bean.CategoryBean.FirstBean;

import java.util.ArrayList;

import java.util.List;

/**

指标建筑分类第一级适配器
@author zlw

public class TargetCategoryFirstAdapter extends BaseAdapter {

private Context mContext;

private List firstBeans =new ArrayList<>();

private int mSelectedBackgroundResource;//选中item时的背景颜色

private int mNormalBackgroundResource;//为选中的背景颜色

private boolean hasDivider = true;

public void setSelectedBackgroundResource(int mSelectedBackgroundResource) {

this.mSelectedBackgroundResource = mSelectedBackgroundResource;

}

public void setNormalBackgroundResource(int mNormalBackgroundResource) {

this.mNormalBackgroundResource = mNormalBackgroundResource;

}

public void setHasDivider(boolean hasDivider) {

this.hasDivider = hasDivider;

}

public TargetCategoryFirstAdapter(Context mContext, List firstBeans) {

this.mContext = mContext;

this.firstBeans = firstBeans;

}

public void setData(List data) {

this.firstBeans = data;

notifyDataSetChanged();

}

@Override

public int getCount() {

if (firstBeans == null) {

return 0;

}

return firstBeans.size();

}

@Override

public Object getItem(int position) {

if (firstBeans == null) {

return null;

}

return firstBeans.get(position);

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder vh = null;

if (convertView == null) {

vh = new ViewHolder();

convertView = LayoutInflater.from(mContext).inflate(R.layout.item_target_category_first, null);

vh.itemLayout = convertView.findViewById(R.id.menu_item_ly);

vh.nameText = convertView.findViewById(R.id.name_rb);

vh.dividerTextView = convertView.findViewById(R.id.menu_item_divider);

convertView.setTag(vh);

} else {

vh = (ViewHolder) convertView.getT
ag();

}

FirstBean firstBean = firstBeans.get(position);

vh.nameText.setText(firstBean.getName());//设置标题

if (firstBean.isSelect){

vh.nameText.setTextColor(mContext.getResources().getColor(R.color.common_blue));

vh.itemLayout.setBackgroundResource(mSelectedBackgroundResource);

}else{

vh.nameText.setTextColor(Color.BLACK);

vh.itemLayout.setBackgroundResource(mNormalBackgroundResource);

}

//隐藏view

vh.dividerTextView.setVisibility(hasDivider ? View.VISIBLE : View.INVISIBLE);

return convertView;

}

private class ViewHolder{

private View itemLayout;

private TextView nameText;

private TextView dividerTextView;

}

TargetCateGorySecondAdapter

package com.jky.mobile_gczjjc.adapter;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseExpandableListAdapter;

import android.widget.TextView;

import com.jky.mobile_gczjjc.R;

import com.jky.mobile_gczjjc.bean.CategoryBean.FirstBean.SecondBean;

import com.jky.mobile_gczjjc.bean.CategoryBean.FirstBean.SecondBean.ThirdBean;

import java.util.ArrayList;

import java.util.List;

/**

指标建筑分类第二级适配器
@author zlw

public class TargetCategorySecondAdapter extends BaseExpandableListAdapter {

private Context mContext;

private List secondBeans= new ArrayList<>();

private int selectedPos = -1;

public TargetCategorySecondAdapter(Context mContext, List menuDatas) {

this.mContext = mContext;

this.secondBeans = menuDatas;

}

//选中的position,及时更新数据

public void setSelectedPos(int selectedPos) {

this.selectedPos = selectedPos;

notifyDataSetChanged();

}

public void setData(List data) {

this.secondBeans = data;

notifyDataSetChanged();

}

@Override

public int getGroupCount() {

return secondBeans.size();

}

@Override

public int getChildrenCount(int groupPosition) {

return secondBeans.get(groupPosition).getItems().size();

}

@Override

public Object getGroup(int groupPosition) {

return secondBeans.get(groupPosition);

}

@Override

public Object getChild(int groupPosition, int childPosition) {

return secondBeans.get(groupPosition).getItems().get(childPosition);

}

@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 View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

ViewHolder vh = null;

if (convertView == null) {

vh = new ViewHolder();

convertView = LayoutInflater.from(mContext).inflate(R.layout.item_target_category_second, null);

vh.menu_item_ly = convertView.findViewById(R.id.menu_item_ly);

vh.nameText = convertView.findViewById(R.id.name_rb);

convertView.setTag(vh);

} else {

vh = (ViewHolder) convertView.getTag();

}

SecondBean secondBean = secondBeans.get(groupPosition);

if (secondBean.isSelect){

vh.nameText.setTextColor(mContext.getResources().getColor(R.color.red_text_color));

}else{

vh.nameText.setTextColor(mContext.getResources().getColor(R.color.gray_text_color));

}

vh.nameText.setText(secondBean.getName());//设置标题

return convertView;

}

@Override
groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

ViewHolder vh = null;

if (convertView == null) {

vh = new ViewHolder();

convertView = LayoutInflater.from(mContext).inflate(R.layout.item_target_category_second, null);

vh.menu_item_ly = convertView.findViewById(R.id.menu_item_ly);

vh.nameText = convertView.findViewById(R.id.name_rb);

convertView.setTag(vh);

} else {

vh = (ViewHolder) convertView.getTag();

}

SecondBean secondBean = secondBeans.get(groupPosition);

if (secondBean.isSelect){

vh.nameText.setTextColor(mContext.getResources().getColor(R.color.red_text_color));

}else{

vh.nameText.setTextColor(mContext.getResources().getColor(R.color.gray_text_color));

}

vh.nameText.setText(secondBean.getName());//设置标题

return convertView;

}

@Override

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android 三级级联筛选列表，写给程序员的Flutter详细教程

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