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Android 百度地图API 定位 导航

2024-08-03 07:19:45   224人阅读


           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：

          Android 百度地图API 定位 导航 代码                         Android 百度地图API 定位 导航 代码

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：

        Android 百度地图API 定位 导航 代码

 

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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publicclass NavigationDemoActivity extendsMapActivity { 
    privateString mMapKey = "注册自己的key"; 
    privateEditText destinationEditText = null; 
    privateButton startNaviButton = null; 
    privateMapView mapView = null; 
    privateBMapManager mMapManager = null; 
    privateMyLocationOverlay 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 
    privateLocationListener locationListener; 
    privateMKSearch searchModel; 
    GeoPoint pt; 
       
    @Override 
    publicvoid 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 = newBMapManager(getApplication()); 
        mMapManager.init(mMapKey, newMyGeneralListener()); 
        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 = newMyLocationOverlay(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 = newLocationListener(){ 
   
            @Override 
            publicvoid 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 = newGeoPoint((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 = newMKSearch(); 
        //设置路线策略为最短距离 
        searchModel.setDrivingPolicy(MKSearch.ECAR_DIS_FIRST); 
        searchModel.init(mMapManager, newMKSearchListener() { 
            //获取驾车路线回调方法 
            @Override 
            publicvoid onGetDrivingRouteResult(MKDrivingRouteResult res, interror) { 
                // 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 = newRouteOverlay(NavigationDemoActivity.this, mapView); 
                   
                // 此处仅展示一个方案作为示例 
                MKRoute route = res.getPlan(0).getRoute(0); 
                intdistanceM = 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(inti = 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 
            publicvoid onGetWalkingRouteResult(MKWalkingRouteResult res, interror) { 
                //获取步行路线 
            } 
               
            @Override 
            publicvoid onGetTransitRouteResult(MKTransitRouteResult arg0, intarg1) { 
                //获取公交线路 
            } 
               
            @Override 
            publicvoid onGetBusDetailResult(MKBusLineResult arg0, intarg1) { 
            } 
            @Override 
            publicvoid onGetAddrResult(MKAddrInfo arg0, intarg1) { 
            } 
            @Override 
            publicvoid onGetSuggestionResult(MKSuggestionResult arg0, intarg1) { 
            } 
            @Override 
            publicvoid onGetPoiResult(MKPoiResult arg0, intarg1, intarg2) { 
            } 
        }); 
           
        startNaviButton.setOnClickListener(newOnClickListener() { 
               
            @Override 
            publicvoid onClick(View v) { 
                String destination = destinationEditText.getText().toString(); 
                   
                //设置起始地（当前位置） 
                MKPlanNode startNode = newMKPlanNode(); 
                startNode.pt = pt; 
                //设置目的地 
                MKPlanNode endNode = newMKPlanNode();  
                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 
    protectedvoid onResume() { 
        mMapManager.getLocationManager().requestLocationUpdates(locationListener); 
        myLocationOverlay.enableMyLocation(); 
        myLocationOverlay.enableCompass(); // 打开指南针 
        mMapManager.start(); 
        super.onResume(); 
    } 
       
    @Override 
    protectedvoid 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 
    protectedboolean isRouteDisplayed() { 
        // TODO Auto-generated method stub 
        returnfalse; 
    } 
       
    // 常用事件监听，用来处理通常的网络错误，授权验证错误等 
    classMyGeneralListener implementsMKGeneralListener { 
            @Override 
            publicvoid onGetNetworkState(intiError) { 
                Log.d("MyGeneralListener", "onGetNetworkState error is "+ iError); 
                Toast.makeText(NavigationDemoActivity.this, "您的网络出错啦！", 
                        Toast.LENGTH_LONG).show(); 
            } 
   
            @Override 
            publicvoid onGetPermissionState(intiError) { 
                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(); 
                } 
            } 
        } 
}
然后是布局文件：
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<?xmlversion="1.0"encoding="utf-8"?> 
<LinearLayoutxmlns: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>
AndroidMainifest.xml：
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<?xmlversion="1.0"encoding="utf-8"?> 
<manifestxmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.ericssonlabs" 
    android:versionCode="1" 
    android:versionName="1.0"> 
   
    <uses-sdkandroid:minSdkVersion="8"/> 
   
    <uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission> 
    <uses-permissionandroid:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission> 
    <uses-permissionandroid:name="android.permission.INTERNET"></uses-permission> 
    <uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> 
    <uses-permissionandroid:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>   
    <uses-permissionandroid:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>  
    <uses-permissionandroid:name="android.permission.READ_PHONE_STATE"></uses-permission> 
       
    <supports-screensandroid:largeScreens="true" 
        android:normalScreens="true"android:smallScreens="true" 
        android:resizeable="true"android:anyDensity="true"/> 
    <uses-sdkandroid: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> 
                <actionandroid:name="android.intent.action.MAIN"/> 
   
                <categoryandroid:name="android.intent.category.LAUNCHER"/> 
            </intent-filter> 
        </activity> 
    </application> 
   
</manifest>

Android 百度地图API 定位 导航


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