集成谷歌地图

前期准备

1.注册谷歌账号，然后再开发者平台登录

开发者平台传送门（需翻墙）
谷歌地图的文档

2.进入控制台，新建项目

3.此时成功创建项目，接下来是添加API，因为谷歌将谷歌地图的功能都拆分成对应的API了，所以需要自己的添加

4.点击要使用API，然后启动即可，稍等一会，就会跳转到API界面，查看已添加API列表中是否已经成功开启

**PS：谷歌部分API是按需收费的，具体收费金额请自行查看文档
5.最后，查看你在控制台的项目的密钥，没有的话需要创建，（我已经创建好了）

**6.创建密钥成功后，需要对密钥添加包名和sha-1证书指纹，点击密钥右边的笔进入修改界面，不知道如何获取sha-1的话，**可以参考此链接

最后保存，至此，控制台方面搞定。接下来是代码环节。

添加依赖

implementation 'com.google.android.gms:play-services-maps:16.1.0'
implementation 'com.google.maps.android:android-maps-utils:0.5+'

Android studio 安装google play services

打开Android Studio，新建项目，在value\string文件下添加你的密钥

  <string name="google_map_key">您的api密钥</string>

打开manifests清单文件，添加标签

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

接着在layout布局中添加fragment控件

<fragment xmlns:android="http://schemas.android.com/apk/res/android"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.goolgle.MainActivity" />

然后在Activity中，让Activity实现OnMapReadyCallback接口，并重写onMapReady方法，完整代码如下

public class MainActivity extends FragmentActivityimplements OnMapReadyCallback {private GoogleMap mMap;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);mapFragment.getMapAsync(this);}@Overridepublic void onMapReady(GoogleMap googleMap) {LatLng sydney = new LatLng(-33.852, 151.211);googleMap.addMarker(new MarkerOptions().position(sydney).title("hello world"));googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));}

运行，显示以下界面则正常，若显示空白，可能你VPN没有打开。

下面介绍一种比较快速的创建项目方法
1.在创建项目的时候选择google maps Activity，然后finish

创建好的项目会自动帮你写好代码和布局，但是你直接运行的话，界面是显示空白的，因为你还没有获取到api密钥，打开google_maps_api.xml。

复制以上链接。打开按照步骤获取api密钥，然后复制到

 <string name="google_maps_key" templateMergeStrategy="preserve" translatable="false">你的密钥</string>

创建 Markers

在onMapReady()方法中写下以下代码，便可创建标点

    @Overridepublic void onMapReady(GoogleMap googleMap) {mMap = googleMap;// Add a marker in Sydney and move the cameraLatLng sydney = new LatLng(-34, 151);mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));//创建markersgoogleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));googleMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.12, 113.26)).title("广州"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.12, 113.26)).title("越秀"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.12, 113.24)).title("荔湾"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.08, 113.31)).title("海珠"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.12, 113.36)).title("天河"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.15, 113.27)).title("白云"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.18, 113.48)).title("黄埔"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.56, 116.41)).title("揭东"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.03, 116.29)).title("惠来"));googleMap.addMarker(new MarkerOptions().position(new LatLng(23.43, 115.84)).title("揭西"));googleMap.addMarker(new MarkerOptions().position(new LatLng(22.91, 112.04)).title("云浮"));}
}

运行效果

定位

添加依赖：

   implementation 'com.google.android.gms:play-services-maps:16.1.0'   implementation 'com.google.maps.android:android-maps-utils:0.5+'

想要实现定位功能，便需要实现 GoogleMap.OnMyLocationButtonClickListener,
GoogleMap.OnMyLocationClickListener，ActivityCompat.OnRequestPermissionsResultCallback三个接口，代码如下：

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, GoogleMap.OnMyLocationButtonClickListener,GoogleMap.OnMyLocationClickListener, ActivityCompat.OnRequestPermissionsResultCallback{private GoogleMap mMap;private static final int LOCATION_PERMISSION_REQUEST_CODE = 1;private boolean mPermissionDenied = false;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_maps);// Obtain the SupportMapFragment and get notified when the map is ready to be used.SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);mapFragment.getMapAsync(this);}/*** Manipulates the map once available.* This callback is triggered when the map is ready to be used.* This is where we can add markers or lines, add listeners or move the camera. In this case,* we just add a marker near Sydney, Australia.* If Google Play services is not installed on the device, the user will be prompted to install* it inside the SupportMapFragment. This method will only be triggered once the user has* installed Google Play services and returned to the app.*/@Overridepublic void onMapReady(GoogleMap googleMap) {//定位mMap = googleMap;mMap.setOnMyLocationButtonClickListener(this);mMap.setOnMyLocationClickListener(this);enableMyLocation();}private void enableMyLocation() {if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED) {// Permission to access the location is missing.PermissionUtils.requestPermission(this, LOCATION_PERMISSION_REQUEST_CODE,android.Manifest.permission.ACCESS_COARSE_LOCATION, true);} else if (mMap != null) {// 设置地图上显示手机的位置，和显示控制按钮mMap.setMyLocationEnabled(true);//设置室内地图是否开启mMap.setIndoorEnabled(true);//设置地图的类型mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);}}//定位图标点击事件@Overridepublic boolean onMyLocationButtonClick() {return false;}@Overridepublic void onMyLocationClick(@NonNull Location location) {}@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,@NonNull int[] grantResults) {if (requestCode != LOCATION_PERMISSION_REQUEST_CODE) {return;}if (PermissionUtils.isPermissionGranted(permissions, grantResults,android.Manifest.permission.ACCESS_COARSE_LOCATION)) {// Enable the my location layer if the permission has been granted.enableMyLocation();} else {// Display the missing permission error dialog when the fragments resume.mPermissionDenied = true;}}@Overrideprotected void onResumeFragments() {super.onResumeFragments();if (mPermissionDenied) {// Permission was not granted, display error dialog.showMissingPermissionError();mPermissionDenied = false;}}private void showMissingPermissionError() {PermissionUtils.PermissionDeniedDialog.newInstance(true).show(getSupportFragmentManager(), "dialog");}
}

PermissionUtils类代码

public abstract class PermissionUtils {/*** Requests the fine location permission. If a rationale with an additional explanation should* be shown to the user, displays a dialog that triggers the request.*/public static void requestPermission(MapsActivity activity, int requestId,String permission, boolean finishActivity) {if (ActivityCompat.shouldShowRequestPermissionRationale(activity, permission)) {// Display a dialog with rationale.PermissionUtils.RationaleDialog.newInstance(requestId, finishActivity).show(activity.getSupportFragmentManager(), "dialog");} else {// Location permission has not been granted yet, request it.ActivityCompat.requestPermissions(activity, new String[]{permission}, requestId);}}/*** Checks if the result contains a {@link PackageManager#PERMISSION_GRANTED} result for a* permission from a runtime permissions request.** @see android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback*/public static boolean isPermissionGranted(String[] grantPermissions, int[] grantResults,String permission) {for (int i = 0; i < grantPermissions.length; i++) {if (permission.equals(grantPermissions[i])) {return grantResults[i] == PackageManager.PERMISSION_GRANTED;}}return false;}/*** A dialog that displays a permission denied message.*/public static class PermissionDeniedDialog extends DialogFragment {private static final String ARGUMENT_FINISH_ACTIVITY = "finish";private boolean mFinishActivity = false;/*** Creates a new instance of this dialog and optionally finishes the calling Activity* when the 'Ok' button is clicked.*/public static PermissionDeniedDialog newInstance(boolean finishActivity) {Bundle arguments = new Bundle();arguments.putBoolean(ARGUMENT_FINISH_ACTIVITY, finishActivity);PermissionDeniedDialog dialog = new PermissionDeniedDialog();dialog.setArguments(arguments);return dialog;}@Overridepublic Dialog onCreateDialog(Bundle savedInstanceState) {mFinishActivity = getArguments().getBoolean(ARGUMENT_FINISH_ACTIVITY);return new AlertDialog.Builder(getActivity()).setMessage(R.string.location_permission_denied).setPositiveButton(android.R.string.ok, null).create();}@Overridepublic void onDismiss(DialogInterface dialog) {super.onDismiss(dialog);if (mFinishActivity) {Toast.makeText(getActivity(), R.string.permission_required_toast,Toast.LENGTH_SHORT).show();getActivity().finish();}}}/*** A dialog that explains the use of the location permission and requests the necessary* permission.* <p>* The activity should implement* {@link android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback}* to handle permit or denial of this permission request.*/public static class RationaleDialog extends DialogFragment {private static final String ARGUMENT_PERMISSION_REQUEST_CODE = "requestCode";private static final String ARGUMENT_FINISH_ACTIVITY = "finish";private boolean mFinishActivity = false;/*** Creates a new instance of a dialog displaying the rationale for the use of the location* permission.* <p>* The permission is requested after clicking 'ok'.** @param requestCode    Id of the request that is used to request the permission. It is*                       returned to the*                       {@link android.support.v4.app.ActivityCompat.OnRequestPermissionsResultCallback}.* @param finishActivity Whether the calling Activity should be finished if the dialog is*                       cancelled.*/public static RationaleDialog newInstance(int requestCode, boolean finishActivity) {Bundle arguments = new Bundle();arguments.putInt(ARGUMENT_PERMISSION_REQUEST_CODE, requestCode);arguments.putBoolean(ARGUMENT_FINISH_ACTIVITY, finishActivity);RationaleDialog dialog = new RationaleDialog();dialog.setArguments(arguments);return dialog;}@Overridepublic Dialog onCreateDialog(Bundle savedInstanceState) {Bundle arguments = getArguments();final int requestCode = arguments.getInt(ARGUMENT_PERMISSION_REQUEST_CODE);mFinishActivity = arguments.getBoolean(ARGUMENT_FINISH_ACTIVITY);return new AlertDialog.Builder(getActivity()).setMessage(R.string.permission_rationale_location).setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// After click on Ok, request the permission.ActivityCompat.requestPermissions(getActivity(),new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION,android.Manifest.permission.ACCESS_COARSE_LOCATION},requestCode);// Do not finish the Activity while requesting permission.mFinishActivity = false;}}).setNegativeButton(android.R.string.cancel, null).create();}@Overridepublic void onDismiss(DialogInterface dialog) {super.onDismiss(dialog);if (mFinishActivity) {Toast.makeText(getActivity(),R.string.permission_required_toast,Toast.LENGTH_SHORT).show();getActivity().finish();}}}
}

运行后，如果出现以下提示

那是因为定位权限没有开启，在设置里面打开即可，点击定位按钮，即可定位，但是因为在国内使用定位会有偏差。

聚合

代码如下

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback{private ClusterManager<MyItem> mClusterManager;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_maps);// Obtain the SupportMapFragment and get notified when the map is ready to be used.SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);mapFragment.getMapAsync(this);}@Overridepublic void onMapReady(GoogleMap googleMap) {setUpClusterer();}//以下是聚合代码private void setUpClusterer() {// Position the map.getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(51.503186, -0.126446), 5.5f));// Initialize the manager with the context and the map.// (Activity extends context, so we can pass 'this' in the constructor.)mClusterManager = new ClusterManager<MyItem>(this, getMap());mClusterManager.setAnimation(true);// Point the map's listeners at the listeners implemented by the cluster// manager.getMap().setOnCameraIdleListener(mClusterManager);getMap().setOnMarkerClickListener(mClusterManager);// Add cluster items (markers) to the cluster manager.addItems();}private void addItems() {// Set some lat/lng coordinates to start with.double lat = 51.5145160;double lng = -0.1270060;// 创建标点for (int i = 0; i < 50; i++) {double offset = i / 60d;lat = lat + offset;lng = lng + offset;String title = "This is the title"+i;String snippet = "and this is the snippet"+i;MyItem offsetItem = new MyItem(lat, lng,title,snippet);mClusterManager.addItem(offsetItem);}}protected GoogleMap getMap() {return mMap;}
}

MyItem代码

public class MyItem implements ClusterItem {private final LatLng mPosition;private String mTitle;private String mSnippet;public MyItem(double lat, double lng) {mPosition = new LatLng(lat, lng);}public MyItem(double lat, double lng, String title, String snippet) {mPosition = new LatLng(lat, lng);mTitle = title;mSnippet = snippet;}@Overridepublic LatLng getPosition() {return mPosition;}@Overridepublic String getTitle() {return mTitle;}@Overridepublic String getSnippet() {return mSnippet;}
}

运行

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Android 集成google map，Markers ，定位，聚合

集成谷歌地图

创建 Markers

定位

聚合

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