标签：android应用
看看这个利用百度地图定位并实现目的地导航的Demo。首先看实现效果：
进 入后首先会得到当前位置，在地图上显示出来，在输入框中输入目的地后，就会在地图上出现最佳线路，我这里设置的是距离最小的驾车线路，另外还有公交线路、 步行线路，在代码中都有详细注释。另外，在控制台还输出了线路上每一个节点的信息以及起始位置和目的地的距离，信息显示的是在当前节点的导航信息。如下 图：
接下来就看如何实现了，首先，注册百度开发者账号，并进入百度地图API查看相关资料百度地图API，然后就是为需要加入地图的应用注册APP KEY，注册完后，下载百度地图jar文件，新建工程，并导入即可，下面看实现具体代码，在代码中有详细注释：
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public
class
NavigationDemoActivity extends
MapActivity { private
String mMapKey = "注册自己的key"; private
EditText destinationEditText = null; private
Button startNaviButton = null; private
MapView mapView = null; private
BMapManager mMapManager = null; private
MyLocationOverlay myLocationOverlay = null; //onResume时注册此listener，onPause时需要Remove,注意此listener不是Android自带的，是百度API中的 private
LocationListener locationListener; private
MKSearch searchModel; GeoPoint
pt; @Override public
void
onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); destinationEditText
= (EditText) this.findViewById(R.id.et_destination); startNaviButton
= (Button) this.findViewById(R.id.btn_navi); mMapManager
= new
BMapManager(getApplication()); mMapManager.init(mMapKey, new
MyGeneralListener()); super.initMapActivity(mMapManager); mapView
= (MapView) this.findViewById(R.id.bmapsView); //设置启用内置的缩放控件 mapView.setBuiltInZoomControls(true); //设置在缩放动画过程中也显示overlay,默认为不绘制 //
mapView.setDrawOverlayWhenZooming(true); //获取当前位置层 myLocationOverlay
= new
MyLocationOverlay(this,
mapView); //将当前位置的层添加到地图底层中 mapView.getOverlays().add(myLocationOverlay); //
注册定位事件 locationListener
= new
LocationListener(){ @Override public
void
onLocationChanged(Location location) { if
(location != null){ //生成GEO类型坐标并在地图上定位到该坐标标示的地点 pt
= new
GeoPoint((int)(location.getLatitude()*1e6), (int)(location.getLongitude()*1e6)); //
System.out.println("---"+location.getLatitude() +":"+location.getLongitude()); mapView.getController().animateTo(pt); } } }; //初始化搜索模块 searchModel
= new
MKSearch(); //设置路线策略为最短距离 searchModel.setDrivingPolicy(MKSearch.ECAR_DIS_FIRST); searchModel.init(mMapManager, new
MKSearchListener() { //获取驾车路线回调方法 @Override public
void
onGetDrivingRouteResult(MKDrivingRouteResult res, int
error) { //
错误号可参考MKEvent中的定义 if
(error != 0
|| res == null)
{ Toast.makeText(NavigationDemoActivity.this, "抱歉，未找到结果",
Toast.LENGTH_SHORT).show(); return; } RouteOverlay
routeOverlay = new
RouteOverlay(NavigationDemoActivity.this,
mapView); //
此处仅展示一个方案作为示例 MKRoute
route = res.getPlan(0).getRoute(0); int
distanceM = route.getDistance(); String
distanceKm = String.valueOf(distanceM / 1000)
+"."+String.valueOf(distanceM
% 1000); System.out.println("距离:"+distanceKm+"公里---节点数量:"+route.getNumSteps()); for
(int
i = 0;
i < route.getNumSteps(); i++) { MKStep
step = route.getStep(i); System.out.println("节点信息："+step.getContent()); } routeOverlay.setData(route); mapView.getOverlays().clear(); mapView.getOverlays().add(routeOverlay); mapView.invalidate(); mapView.getController().animateTo(res.getStart().pt); } //以下两种方式和上面的驾车方案实现方法一样 @Override public
void
onGetWalkingRouteResult(MKWalkingRouteResult res, int
error) { //获取步行路线 } @Override public
void
onGetTransitRouteResult(MKTransitRouteResult arg0, int
arg1) { //获取公交线路 } @Override public
void
onGetBusDetailResult(MKBusLineResult arg0, int
arg1) { } @Override public
void
onGetAddrResult(MKAddrInfo arg0, int
arg1) { } @Override public
void
onGetSuggestionResult(MKSuggestionResult arg0, int
arg1) { } @Override public
void
onGetPoiResult(MKPoiResult arg0, int
arg1, int
arg2) { } }); startNaviButton.setOnClickListener(new
OnClickListener() { @Override public
void
onClick(View v) { String
destination = destinationEditText.getText().toString(); //设置起始地（当前位置） MKPlanNode
startNode = new
MKPlanNode(); startNode.pt
= pt; //设置目的地 MKPlanNode
endNode = new
MKPlanNode(); endNode.name
= destination; //展开搜索的城市 String
city = getResources().getString(R.string.beijing); //
System.out.println("----"+city+"---"+destination+"---"+pt); searchModel.drivingSearch(city,
startNode, city, endNode); //步行路线 //
searchModel.walkingSearch(city, startNode, city, endNode); //公交路线 //
searchModel.transitSearch(city, startNode, endNode); } }); } @Override protected
void
onResume() { mMapManager.getLocationManager().requestLocationUpdates(locationListener); myLocationOverlay.enableMyLocation(); myLocationOverlay.enableCompass(); //
打开指南针 mMapManager.start(); super.onResume(); } @Override protected
void
onPause() { mMapManager.getLocationManager().removeUpdates(locationListener); myLocationOverlay.disableMyLocation();//显示当前位置 myLocationOverlay.disableCompass(); //
关闭指南针 mMapManager.stop(); super.onPause(); } @Override protected
boolean
isRouteDisplayed() { //
TODO Auto-generated method stub return
false; } //
常用事件监听，用来处理通常的网络错误，授权验证错误等 class
MyGeneralListener implements
MKGeneralListener { @Override public
void
onGetNetworkState(int
iError) { Log.d("MyGeneralListener", "onGetNetworkState
error is "+
iError); Toast.makeText(NavigationDemoActivity.this, "您的网络出错啦！", Toast.LENGTH_LONG).show(); } @Override public
void
onGetPermissionState(int
iError) { Log.d("MyGeneralListener", "onGetPermissionState
error is "+
iError); if
(iError == MKEvent.ERROR_PERMISSION_DENIED) { //
授权Key错误： Toast.makeText(NavigationDemoActivity.this, "请在BMapApiDemoApp.java文件输入正确的授权Key！", Toast.LENGTH_LONG).show(); } } } } |
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<?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="fill_parent" android:orientation="vertical"
> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal"
> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="18sp" android:text="Destination："
/> <EditText android:id="@+id/et_destination" android:layout_width="fill_parent" android:layout_height="wrap_content"
/> </LinearLayout> <Button android:id="@+id/btn_navi" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Start
navigate"/> <com.baidu.mapapi.MapView android:id="@+id/bmapsView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:clickable="true"
/> </LinearLayout> |
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<?xml
version="1.0"
encoding="utf-8"?> <manifest
xmlns:android="http://schemas.android.com/apk/res/android" package="com.ericssonlabs" android:versionCode="1" android:versionName="1.0"
> <uses-sdk
android:minSdkVersion="8"
/> <uses-permission
android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission> <uses-permission
android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission> <uses-permission
android:name="android.permission.INTERNET"></uses-permission> <uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> <uses-permission
android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission> <uses-permission
android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission> <uses-permission
android:name="android.permission.READ_PHONE_STATE"></uses-permission> <supports-screens
android:largeScreens="true" android:normalScreens="true"
android:smallScreens="true" android:resizeable="true"
android:anyDensity="true"/> <uses-sdk
android:minSdkVersion="3"></uses-sdk> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name"
> <activity android:name=".NavigationDemoActivity" android:label="@string/app_name"
> <intent-filter> <action
android:name="android.intent.action.MAIN"
/> <category
android:name="android.intent.category.LAUNCHER"
/> </intent-filter> </activity> </application> </manifest> |
标签：android应用
原文地址：http://blog.csdn.net/littleyearyear/article/details/41307417
