基于Google提供play-services:9.8.0的Google 地图开发，适用于Activity、Fragment，并实现添加Marker和根据经纬度显示运动轨迹

本文是基利用Google提供play-services:9.8.0的Google 地图开发，适用于Activity、Fragment中添加google地图，并实现添加Marker和根据经纬度显示运动轨迹；新版本的google地图开发，已经没有MapView和MapControler等实现地图的操作。在Activity中的layout中xml是：

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.ilang.googlemaptest.MapsActivity" />

Activity中onResume，onPause，onDestroy等可以调用SupportMapFragment的onResume，onPause，onDestroy。在Fragment中的layout中xml是：

<com.google.android.gms.maps.MapView
android:id="@+id/mv_google"
android:layout_width="match_parent"
android:layout_height="match_parent" />

Fragment中onResume，onPause，onDestroy等可以调用MapView的onResume，onPause，onDestroy。AndroidManifest.xml添加网络和位置权限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.LOCATION_HARDWARE" />

<uses-feature android:name="android.hardware.Sensor" />

application中申明

<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />

利用自己编写的一个GoogleMap工具类实现根据经纬度，在Google Map显示图标和运动轨迹，调用接口为setMarkerOnPosition(LatLng latlng)和

showRouteOnMap(LatLng[] latLngs)。

该工具栏有三个initMap方法，前两个是用于Activity中调用，后一个是把MapView放到Fragment中使用时的初始化google地图方法。

下文是完整的GoogleMap工具类代码：

public class GoogleMapHelper implements OnMapReadyCallback {private final String TAG = this.getClass().getSimpleName();private Context mContext = null;private GoogleMap map = null;private Location mLocation = null;private SupportMapFragment mapFragment = null;private Marker marker = null;private LatLng[] latLngs = null;/*** this method will be used in activity** @param context* @param resId*/public void initMap(Context context, int resId) {if (context != null) {mapFragment = (SupportMapFragment) ((FragmentActivity) context).getSupportFragmentManager().findFragmentById(resId);mContext = context;if (mapFragment != null) {mapFragment.getMapAsync(this);}}}/*** this method will be used in activity** @param fragment*/public void initMap(SupportMapFragment fragment) {if (fragment != null) {mapFragment = fragment;mapFragment.getMapAsync(this);}}/*** this method will be used in fragment** @param mapView ,google MapView*/public void initMap(Context context, MapView mapView, Bundle savedInstanceState) {if (mapView != null) {mapView.onCreate(savedInstanceState);//mapView.onResume();    // It will get the map to display immediatelytry {MapsInitializer.initialize(context);} catch (Exception e) {e.printStackTrace();}int errorCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(context);if (ConnectionResult.SUCCESS != errorCode) {GooglePlayServicesUtil.getErrorDialog(errorCode, (Activity) context, 0).show();} else {mapView.getMapAsync(this);}//MapView support next method,it can be used in fragment life time./*mapView.onCreate(savedInstanceState);mapView.onSaveInstanceState(savedInstanceState);mapView.onStart();mapView.onResume();mapView.onPause();mapView.onStop();mapView.onDestroy();*/4000}}@Overridepublic void onMapReady(GoogleMap googleMap) {map = googleMap;map.setMapType(GoogleMap.MAP_TYPE_NORMAL);map.setTrafficEnabled(true);if (mContext != null) {if (PackageManager.PERMISSION_GRANTED == ContextCompat.checkSelfPermission(mContext,android.Manifest.permission.ACCESS_FINE_LOCATION)) {map.setMyLocationEnabled(true);}}map.setIndoorEnabled(true);if (mLocation != null) {LatLng me = new LatLng(mLocation.getLatitude(), mLocation.getLongitude());map.addMarker(new MarkerOptions().position(me).title("Hello,Marker on my position."));map.moveCamera(CameraUpdateFactory.newLatLng(me));map.moveCamera(CameraUpdateFactory.zoomTo(16));}}public GoogleMap getMap() {return map;}public void setMap(GoogleMap map) {this.map = map;}public Location getLocation() {return mLocation;}public void setLocation(Location mLocation) {this.mLocation = mLocation;}public SupportMapFragment getMapFragment() {return mapFragment;}public void setMapFragment(SupportMapFragment mapFragment) {this.mapFragment = mapFragment;}private double getMaxLatitude(LatLng[] latLngs) {double max = latLngs[0].latitude;for (LatLng latlng : latLngs) {if (max < latlng.latitude) {max = latlng.latitude;}}return max;}private double getMinLatitude(LatLng[] latLngs) {double min = latLngs[0].latitude;for (LatLng latlng : latLngs) {if (min > latlng.latitude) {min = latlng.latitude;}}return min;}private double getMaxLongitude(LatLng[] latLngs) {double max = latLngs[0].longitude;for (LatLng latlng : latLngs) {if (max < latlng.longitude) {max = latlng.longitude;}}return max;}private double getMinLongitude(LatLng[] latLngs) {double min = latLngs[0].longitude;for (LatLng latlng : latLngs) {if (min > latlng.longitude) {min = latlng.longitude;}}return min;}private LatLng getSouthWestLatLng(LatLng[] latLngs) {return new LatLng(getMinLatitude(latLngs), getMinLongitude(latLngs));}private LatLng getNorthEastLatLng(LatLng[] latLngs) {return new LatLng(getMaxLatitude(latLngs), getMaxLongitude(latLngs));}/*** realise to move the marker smoothly.** @param marker,   the marker to move* @param toLatLng, the LatLng, move to destination position*/private void moveMarkerSmooth(final Marker marker, LatLng toLatLng) {if (marker != null) {final List<LatLng> roads = new ArrayList<>();LatLng fromLatLng = marker.getPosition();    //current positionLatLng latLng_second = new LatLng((fromLatLng.latitude + toLatLng.latitude) / 2,(fromLatLng.longitude + toLatLng.longitude) / 2);LatLng latLng_first = new LatLng((fromLatLng.latitude + latLng_second.latitude) / 2,(fromLatLng.longitude + latLng_second.longitude) / 2);LatLng latLng_third = new LatLng((latLng_second.latitude + toLatLng.latitude) / 2,(latLng_second.longitude + toLatLng.longitude) / 2);roads.add(latLng_first);roads.add(latLng_second);roads.add(latLng_third);roads.add(toLatLng);Thread move = new Thread(new Runnable() {@Overridepublic void run() {try {for (int i = 0; i < roads.size(); i++) {marker.setPosition(roads.get(i));Thread.sleep(200);}} catch (Exception e) {e.printStackTrace();}}});move.start();}}public void onResume() {if (mapFragment != null) {mapFragment.onResume();}}public void onPause() {if (mapFragment != null) {mapFragment.onPause();}}public void onStop() {if (mapFragment != null) {mapFragment.onStop();}}/*** 这个方法谨慎使用，在activity的onDestroy()会有问题*/public void onDestroy() {if (mapFragment != null) {mapFragment.onDestroy();}}public void clearMap() {if (map != null) {map.clear();}}public void setMarkerOnPosition(LatLng latLng) {//avoid adding the duplicate marker on mapif (map != null) {if (marker != null) {//marker.remove();   //do not usemarker.setPosition(latLng);//moveMarkerSmooth(marker, latLng);} else {marker = map.addMarker(new MarkerOptions().position(latLng));//marker = map.addMarker(new MarkerOptions().position(latLng).icon()); //set marker icon}Log.d(TAG, "set marker on map");}}public Polyline showRouteOnMap(LatLng[] latLngs) {PolylineOptions lineOptions = new PolylineOptions();lineOptions.add(latLngs);lineOptions.color(Color.BLUE);lineOptions.geodesic(true);LatLngBounds bounds = new LatLngBounds.Builder().include(getSouthWestLatLng(latLngs)).include(getNorthEastLatLng(latLngs)).build();if (map != null) {clearMap();Log.d(TAG, "show route on map");Polyline line = map.addPolyline(lineOptions);map.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 0));return line;}return null;}}