編輯：關於Android編程
實現效果
![這裡寫圖片描述](https://www.android5.online/Android/UploadFiles_5356/201702/2017022216511309.png "\")
其實在ReactNative中實現ListView的分組效果的方式與Android中的ExpandableListview非常相似，只是在表現形式上更趨近於IOS中的UITableView而已。
在ReactNative中ListView分組效果的數據結構為
var dataBlob = {
'sectionId1' : {...sectionId1 data},
'sectionId1:rowId1' : {...row1 data},
'sectionId1:rowId2' : {...row2 data},
'sectionId2' : {...sectionId2 data},
'sectionId2:rowId1' : {...row1 data},
'sectionId2:rowId2' : {...row2 data},
...
}
var sectionIds = ['sectionId1','sectionId2','sectionId3'...];
var rowIds = [['rowId1','rowId2'...],['rowId1','rowId2'...],...];
如上所示，在RN中ListView中的分組數據全部放入dataBlob 中，通過 ‘sectionId ’ 來獲取每個組的header中的數據，通過 ‘sectionId:rowId’ 這種形式來獲取每個組中對應的列的數據。其中’sectionId ‘保存在一個一維數組中，’rowIds’保存在一個二維數組中。
在state中去設置dataSource的方式也與普通的ListView有所不同。
// 初始化函數
getInitialState(){
var getSectionData = (dataBlob, sectionID) => {
return dataBlob[sectionID];
};
var getRowData = (dataBlob, sectionID, rowID) => {
return dataBlob[sectionID + ':' + rowID];
};
return{
dataSource: new ListView.DataSource({
getSectionData: getSectionData, // 獲取組中數據
getRowData: getRowData, // 獲取行中的數據
rowHasChanged: (r1, r2) => r1 !== r2,
sectionHeaderHasChanged:(s1, s2) => s1 !== s2
})
}
}
下面是具體代碼的實現方式：
/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
ListView,
TouchableOpacity,
Image,
AlertIOS
} from 'react-native';
var Car = require('./Cars.json');
var SectionListView = React.createClass({
getInitialState(){
var getSectionData = (dataBlob,sectionID) => {
return dataBlob[sectionID];
};
var getRowData = (dataBlob,sectionID,rowID) => {
return dataBlob[sectionID + ":" + rowID];
};
return {
dataSource:new ListView.DataSource({
getSectionData:getSectionData,
getRowData:getRowData,
rowHasChanged:(r1 , r2) => r1 !== r2,
sectionHeaderHasChanged:(s1, s2) => s1 !== s2,
})
};
},
render(){
return(
);
},
componentDidMount(){
this.loadListViewDataFormJson();
},
loadListViewDataFormJson(){
// 拿到所有的json數據
var jsonData = Car.data;
// 定義變量
var dataBlob = {},
sectionIDs = [],
rowIDs = [];
for (var i = 0 ; i < jsonData.length ; i++){
// 1.拿到所有的sectionId
sectionIDs.push(i);
// 2.把組中的內容放入dataBlob內容中
dataBlob[i] = jsonData[i].title;
// 3.設置改組中每條數據的結構
rowIDs[i] = [];
// 4.取出改組中所有的數據
var cars = jsonData[i].cars;
// 5.便利cars,設置每組的列表數據
for (var j = 0 ; j < cars.length ; j++){
// 改組中的每條對應的rowId
rowIDs[i].push(j);
// 把每一行中的內容放入dataBlob對象中
dataBlob[i+':'+j] = cars[j];
}
}
// 更新狀態
this.setState({
dataSource: this.state.dataSource.cloneWithRowsAndSections(dataBlob,sectionIDs,rowIDs)
});
},
// 每一行中的數據
renderRow(rowData){
return (
![]()
{rowData.name}
);
},
// 每一組對應的數據
renderSectionHeader(sectionData,sectionId){
return (
{sectionData}
);
}
});
const styles = StyleSheet.create({
listStyle:{
},
sectionView:{
height:22,
backgroundColor:"#c3c3c3",
justifyContent:"center"
},
sectionTitle:{
marginLeft:16,
},
rowView:{
height:44,
flexDirection:'row',
paddingLeft:16,
alignItems:'center'
},
rowImage:{
width:44,
height:44
},
rowTitleSup:{
height:44,
width:700,
borderBottomWidth:1,
borderBottomColor:"#c3c3c3",
marginLeft:16,
justifyContent:'center'
},
rowTitle:{
fontSize:16,
}
});
module.exports = SectionListView;
Car.json
{
"data": [
{
"cars": [
{
"icon": "m_180_100.png",
"name": "AC Schnitzer"
},
{
"icon": "m_92_100.png",
"name": "阿爾法·羅密歐"
},
{
"icon": "m_9_100.png",
"name": "奧迪"
},
{
"icon": "m_97_100.png",
"name": "阿斯頓·馬丁"
}
],
"title": "A"
},
{
"cars": [
{
"icon": "m_172_100.png",
"name": "巴博斯"
},
{
"icon": "m_157_100.png",
"name": "寶駿"
},
{
"icon": "m_3_100.png",
"name": "寶馬"
},
{
"icon": "m_82_100.png",
"name": "保時捷"
},
{
"icon": "m_163_100.png",
"name": "北京汽車"
},
{
"icon": "m_211_100.png",
"name": "北汽幻速"
},
{
"icon": "m_168_100.png",
"name": "北汽威旺"
},
{
"icon": "m_14_100.png",
"name": "北汽制造"
},
{
"icon": "m_2_100.png",
"name": "奔馳"
},
{
"icon": "m_59_100.png",
"name": "奔騰"
},
{
"icon": "m_26_100.png",
"name": "本田"
},
{
"icon": "m_5_100.png",
"name": "標致"
},
{
"icon": "m_127_100.png",
"name": "別克"
},
{
"icon": "m_85_100.png",
"name": "賓利"
},
{
"icon": "m_15_100.png",
"name": "比亞迪"
},
{
"icon": "m_135_100.png",
"name": "布加迪"
}
],
"title": "B"
},
{
"cars": [
{
"icon": "m_129_100.png",
"name": "昌河"
}
],
"title": "C"
},
{
"cars": [
{
"icon": "m_113_100.png",
"name": "道奇"
},
{
"icon": "m_165_100.png",
"name": "大通"
},
{
"icon": "m_8_100.png",
"name": "大眾"
},
{
"icon": "m_27_100.png",
"name": "東風"
},
{
"icon": "m_197_100.png",
"name": "東風風度"
},
{
"icon": "m_141_100.png",
"name": "東風風神"
},
{
"icon": "m_115_100.png",
"name": "東風風行"
},
{
"icon": "m_205_100.png",
"name": "東風小康"
},
{
"icon": "m_29_100.png",
"name": "東南"
},
{
"icon": "m_179_100.png",
"name": "DS"
}
],
"title": "D"
},
{
"cars": [
{
"icon": "m_91_100.png",
"name": "法拉利"
},
{
"icon": "m_199_100.png",
"name": "飛馳商務車"
},
{
"icon": "m_164_100.png",
"name": "菲斯克"
},
{
"icon": "m_40_100.png",
"name": "菲亞特"
},
{
"icon": "m_7_100.png",
"name": "豐田"
},
{
"icon": "m_67_100.png",
"name": "福迪"
},
{
"icon": "m_190_100.png",
"name": "弗那薩利"
},
{
"icon": "m_208_100.png",
"name": "福汽啟騰"
},
{
"icon": "m_17_100.png",
"name": "福特"
},
{
"icon": "m_128_100.png",
"name": "福田"
}
],
"title": "F"
},
{
"cars": [
{
"icon": "m_109_100.png",
"name": "GMC"
},
{
"icon": "m_110_100.png",
"name": "光岡"
},
{
"icon": "m_147_100.png",
"name": "廣汽"
},
{
"icon": "m_63_100.png",
"name": "廣汽吉奧"
},
{
"icon": "m_133_100.png",
"name": "廣汽日野"
},
{
"icon": "m_182_100.png",
"name": "觀致汽車"
}
],
"title": "G"
},
{
"cars": [
{
"icon": "m_31_100.png",
"name": "哈飛"
},
{
"icon": "m_196_100.png",
"name": "哈弗"
},
{
"icon": "m_170_100.png",
"name": "海格"
},
{
"icon": "m_32_100.png",
"name": "海馬"
},
{
"icon": "m_149_100.png",
"name": "海馬商用車"
},
{
"icon": "m_181_100.png",
"name": "恆天汽車"
},
{
"icon": "m_58_100.png",
"name": "紅旗"
},
{
"icon": "m_52_100.png",
"name": "黃海"
},
{
"icon": "m_112_100.png",
"name": "華泰"
},
{
"icon": "m_45_100.png",
"name": "匯眾"
}
],
"title": "H"
},
{
"cars": [
{
"icon": "m_35_100.png",
"name": "江淮"
},
{
"icon": "m_37_100.png",
"name": "江鈴"
},
{
"icon": "m_38_100.png",
"name": "江南"
},
{
"icon": "m_98_100.png",
"name": "捷豹"
},
{
"icon": "m_143_100.png",
"name": "吉利帝豪"
},
{
"icon": "m_144_100.png",
"name": "吉利全球鷹"
},
{
"icon": "m_148_100.png",
"name": "吉利英倫"
},
{
"icon": "m_39_100.png",
"name": "金杯"
},
{
"icon": "m_57_100.png",
"name": "金龍聯合"
},
{
"icon": "m_161_100.png",
"name": "金旅客車"
},
{
"icon": "m_152_100.png",
"name": "九龍"
},
{
"icon": "m_4_100.png",
"name": "Jeep"
}
],
"title": "J"
},
{
"cars": [
{
"icon": "m_188_100.png",
"name": "卡爾森"
},
{
"icon": "m_107_100.png",
"name": "凱迪拉克"
},
{
"icon": "m_150_100.png",
"name": "開瑞"
},
{
"icon": "m_51_100.png",
"name": "克萊斯勒"
},
{
"icon": "m_145_100.png",
"name": "科尼塞克"
},
{
"icon": "m_212_100.png",
"name": "KTM"
}
],
"title": "K"
},
{
"cars": [
{
"icon": "m_86_100.png",
"name": "蘭博基尼"
},
{
"icon": "m_200_100.png",
"name": "藍海房車"
},
{
"icon": "m_80_100.png",
"name": "勞斯萊斯"
},
{
"icon": "m_94_100.png",
"name": "雷克薩斯"
},
{
"icon": "m_99_100.png",
"name": "雷諾"
},
{
"icon": "m_146_100.png",
"name": "蓮花"
},
{
"icon": "m_153_100.png",
"name": "獵豹汽車"
},
{
"icon": "m_76_100.png",
"name": "力帆"
},
{
"icon": "m_16_100.png",
"name": "鈴木"
},
{
"icon": "m_166_100.png",
"name": "理念"
},
{
"icon": "m_95_100.png",
"name": "林肯"
},
{
"icon": "m_36_100.png",
"name": "陸風"
},
{
"icon": "m_96_100.png",
"name": "路虎"
},
{
"icon": "m_83_100.png",
"name": "路特斯"
}
],
"title": "L"
},
{
"cars": [
{
"icon": "m_183_100.png",
"name": "邁凱倫"
},
{
"icon": "m_93_100.png",
"name": "瑪莎拉蒂"
},
{
"icon": "m_18_100.png",
"name": "馬自達"
},
{
"icon": "m_79_100.png",
"name": "MG"
},
{
"icon": "m_81_100.png",
"name": "MINI"
},
{
"icon": "m_201_100.png",
"name": "摩根"
}
],
"title": "M"
},
{
"cars": [
{
"icon": "m_155_100.png",
"name": "納智捷"
}
],
"title": "N"
},
{
"cars": [
{
"icon": "m_104_100.png",
"name": "歐寶"
},
{
"icon": "m_84_100.png",
"name": "讴歌"
},
{
"icon": "m_171_100.png",
"name": "歐朗"
}
],
"title": "O"
},
{
"cars": [
{
"icon": "m_156_100.png",
"name": "啟辰"
},
{
"icon": "m_43_100.png",
"name": "慶鈴"
},
{
"icon": "m_42_100.png",
"name": "奇瑞"
},
{
"icon": "m_28_100.png",
"name": "起亞"
}
],
"title": "Q"
},
{
"cars": [
{
"icon": "m_30_100.png",
"name": "日產"
},
{
"icon": "m_78_100.png",
"name": "榮威"
},
{
"icon": "m_142_100.png",
"name": "瑞麒"
}
],
"title": "R"
},
{
"cars": [
{
"icon": "m_25_100.png",
"name": "三菱"
},
{
"icon": "m_209_100.png",
"name": "山姆"
},
{
"icon": "m_195_100.png",
"name": "紳寶"
},
{
"icon": "m_50_100.png",
"name": "雙環"
},
{
"icon": "m_102_100.png",
"name": "雙龍"
},
{
"icon": "m_111_100.png",
"name": "斯巴魯"
},
{
"icon": "m_10_100.png",
"name": "斯柯達"
},
{
"icon": "m_89_100.png",
"name": "smart"
}
],
"title": "S"
},
{
"cars": [
{
"icon": "m_202_100.png",
"name": "泰卡特"
},
{
"icon": "m_189_100.png",
"name": "特斯拉"
}
],
"title": "T"
},
{
"cars": [
{
"icon": "m_140_100.png",
"name": "威麟"
},
{
"icon": "m_186_100.png",
"name": "威茲曼"
},
{
"icon": "m_19_100.png",
"name": "沃爾沃"
},
{
"icon": "m_48_100.png",
"name": "五菱"
}
],
"title": "W"
},
{
"cars": [
{
"icon": "m_13_100.png",
"name": "現代"
},
{
"icon": "m_174_100.png",
"name": "星客特"
},
{
"icon": "m_71_100.png",
"name": "新凱"
},
{
"icon": "m_87_100.png",
"name": "西雅特"
},
{
"icon": "m_49_100.png",
"name": "雪佛蘭"
},
{
"icon": "m_6_100.png",
"name": "雪鐵龍"
}
],
"title": "X"
},
{
"cars": [
{
"icon": "m_194_100.png",
"name": "揚州亞星客車"
},
{
"icon": "m_138_100.png",
"name": "野馬汽車"
},
{
"icon": "m_100_100.png",
"name": "英菲尼迪"
},
{
"icon": "m_53_100.png",
"name": "一汽"
},
{
"icon": "m_41_100.png",
"name": "依維柯"
},
{
"icon": "m_75_100.png",
"name": "永源"
}
],
"title": "Y"
},
{
"cars": [
{
"icon": "m_136_100.png",
"name": "長安轎車"
},
{
"icon": "m_159_100.png",
"name": "長安商用"
},
{
"icon": "m_21_100.png",
"name": "長城"
},
{
"icon": "m_203_100.png",
"name": "之諾"
},
{
"icon": "m_60_100.png",
"name": "中華"
},
{
"icon": "m_167_100.png",
"name": "中歐"
},
{
"icon": "m_77_100.png",
"name": "眾泰"
},
{
"icon": "m_204_100.png",
"name": "中通客車"
},
{
"icon": "m_33_100.png",
"name": "中興"
}
],
"title": "Z"
}
]
}
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