百度地图API自动定位和3种导航

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<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
	<style type="text/css">
		body, html {width: 100%;height: 100%; margin:0;font-family:"微软雅黑";}
		#l-map{height: 220px;width:100%;}
		#r-result,#r-result table{width:100%;}
		.nav { width: 100%; height: 2em; line-height: 2em; background: #EDEDED; border: 1px solid #ADADAD;}
		.nav .nav-inner{ width: 30%; margin-left: 35%;}
		.nav .nav-sub { float: left; width: 33%;}
		.nav .nav-sub a { text-decoration: none; }
		.nav .nav-sub a i { display: inline-block; background: url("http://webmap1.map.bdstatic.com/wolfman/static/common/images/ui3/mo_banner_ba37b5d.png")}
		.nav .nav-sub a.bus i { background-position: -1px -192px; position: relative; top: 2px; width: 13px; height: 16px;}
		.nav .nav-sub a.driver i { background-position: -29px -194px; width: 15px; height: 14px;}
		.nav .nav-sub a.walk i { background-position: -102px -189px; width: 16px; height: 18px;}
		.nav .nav-sub a.bus.cur i { background-position: -15px -192px; }
		.nav .nav-sub a.driver.cur i { background-position: -45px -194px; }
		.nav .nav-sub a.walk.cur i { background-position: -120px -189px;}
		.hide { display: none;}
		input { font-family: "micrsoft yahei"; width: 80%; height: 2em; font-size: 1em; line-height: 2em; border: 0px; outline: 0px; padding: .2em 1em; margin: 0em 10%;}
		.btn-group { width: 100%; border-top: 1px solid #DDD; border-bottom: 2px solid #DDD;}
		button {width: 32%; text-align: center; border: 0; border-radius: 0; background-color: inherit; height: 44px; line-height: 44px; font-size: 15px;}
	</style>
	<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=FbzOyQ4YujPrZsxiQKoB07aB"></script>
	<script type="text/javascript" src="http://libs.baidu.com/jquery/1.8.2/jquery.min.js"></script>
	<title>导航示例</title>
</head>
<body>
	<div id="search">
		<input type="text" id="start" placeholder="正在定位您的位置..." style="border-bottom: 1px solid #DDD; " />
		<input type="text" id="end" value="汽车西站-公交车站" readonly="true" />
		<input type="hidden" id="start_point" value=""/>
		<input type="hidden" id="end_point" value="112.918571,28.214124"/>
		<input type="hidden" id="start_location" value=""/>
		<div class="btn-group">
			<button id="bus-search">公交</button>
			<button id="driver-search">驾车</button>
			<button id="walk-search">步行</button>
		</div>
	</div>
	<div id="showMap" class="hide">
		<div class="nav">
			<div class="nav-inner">
				<div class="nav-sub"><a href="#" class="bus"><i></i></a></div>
				<div class="nav-sub"><a href="#" class="driver cur"><i></i></a></div>
				<div class="nav-sub"><a href="#" class="walk"><i></i></a></div>
			</div>
			<!-- <a href="javascript:;" id="reLocation">重新导航</a> -->
		</div>
		<div id="l-map"></div>
		<div id="r-result"></div>
	</div>

<script type="text/javascript">

$(function(){

	var ep = $("#end_point").val().split(",");
	var map = new BMap.Map("l-map");
	var point = new BMap.Point(ep[0], ep[1]);
	map.centerAndZoom(point, 16);

	// 定位对象
	var geoc = new BMap.Geocoder();
	var geolocation = new BMap.Geolocation();
	geolocation.getCurrentPosition(function(r){
		if(this.getStatus() == BMAP_STATUS_SUCCESS){
			//var mk = new BMap.Marker(r.point);
			//map.addOverlay(mk);
			//map.panTo(r.point);
			$("#start_point").val(r.point.lng+','+r.point.lat);
			setLocation(r.point);
			showMap();

		}else {
			$("#start").attr("placeholder","请输入您的当前位置")
			alert('无法定位到您的当前位置,导航失败,请手动输入您的当前位置!'+this.getStatus());
		}
	},{enableHighAccuracy: true});

	$(".nav .nav-sub a").click(function(){
		$(".nav .nav-sub a").removeClass('cur');
		$(this).addClass('cur');
		searchRoute();
	})

	$("#reLocation").click(function(){
		reLocation();
	});

	$("#bus-search,#driver-search,#walk-search").click(function(){
		var id = $(this).attr("id");
		$(".nav .nav-sub a").removeClass('cur');
		if(id == "bus-search"){
			$(".nav .nav-sub a.bus").addClass('cur');
		}else if(id == "driver-search"){
			$(".nav .nav-sub a.driver").addClass('cur');
		}else if(id == "walk-search"){
			$(".nav .nav-sub a.walk").addClass('cur');
		}
		showMap();
	})

	function reLocation(){
		$("#search").show();
		$("#showMap").hide();
		map = new BMap.Map("l-map");
	}

	function showMap(){
		$("#srarch").hide();
		$("#showMap").show();
		searchRoute();
	}

	function setLocation(point){
		geoc.getLocation(point, function(rs){
			var addComp = rs.addressComponents;
			var result = addComp.province + addComp.city + addComp.district + addComp.street + addComp.streetNumber;
			$("#start").val(result);
			$("#start_location").val(result);
			searchRoute();
		});
	}

	function searchRoute(s_, e_){
		map = new BMap.Map("l-map");
		var cur = $(".nav .nav-sub a.cur");
		var type = "";

		if(cur.hasClass('bus')){
			type = "bus";
		}else if(cur.hasClass('driver')){
			type = "driver";
		}else if(cur.hasClass('walk')){
			type = "walk";
		}else{
			type = "driver";
		}

		var s_;
		var e_;

		var sl = $("#start_location").val();
		var s = $("#start").val();
		var sp = $("#start_point").val();
		var e = $("#end").val();
		var ep = $("#end_point").val();

		if(s != sl){// 如果用户修改了地址(与定位的位置不一致)则使用地址搜索
			s_ = s;
			e_ = e;
		}else if(sp){// 否则使用坐标搜索
			var ps = sp.split(",");
			var pe = ep.split(",");
			s_ = new BMap.Point(ps[0], ps[1]);
			e_ = new BMap.Point(pe[0], pe[1]);
		}

		if(type == "bus"){
			var transit = new BMap.TransitRoute(map, {renderOptions: {map: map, panel: "r-result", autoViewport: true}});
			transit.search(s_, e_);
		}else if(type == "driver"){
			var driving = new BMap.DrivingRoute(map, {renderOptions: {map: map, panel: "r-result", autoViewport: true}});
			driving.search(s_, e_);
		}else if(type == "walk"){
			var walking = new BMap.WalkingRoute(map, {renderOptions: {map: map, panel: "r-result", autoViewport: true}});
			walking.search(s_, e_);
		}
	}
})

</script>
</body>
</html>