Android接入google地图

创建谷歌云结算账户

1.注册一个Google 帐号

2.需要一个可以美元扣款的信用卡

3.登录Google帐号，访问Google Cloud谷歌云的网站 cloud.google.com，之后点击蓝色按钮免费开始使用，按提示注册即可。

示例源代码：

git@github.com:sueleeyu/android-maps.git

二、控制台创建Project

1.进入谷歌云控制台，创建项目：

https://console.cloud.google.com/projectselector2/home/dashboard

2.创建凭证：选择创建的项目，点击左上角图标，创建该项目凭据

3.输入包名和证书指纹

在android studio控制台输入：

keytool -list -printcert -jarfile F:\...\app-release.apk //apk位置

可以获取指纹

4.选择api库

5.选择android sdk

6.启用：

三、创建android studio项目

1.新建空白android工程

2.添加google play service：File-Setting-Google Play service。

3.在app的build.gradle的dependencies添加：

implementation 'com.google.android.gms:play-services-maps:18.0.2'

implementation 'com.google.android.gms:play-services-location:19.0.1'

4.strings.xml中添加谷歌云控制台生成的appKey：

<string name="google_map_key">AIzaSyBY…gLc</string>

5.在AndroidManifest.xml中添加meta-data：

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

6. 在AndroidManifest.xml中添加权限：

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

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

7.添加如下fragment到activity_main.xml，运行demo。

<fragment

android:id="@+id/mapview"

class="com.google.android.gms.maps.SupportMapFragment"

android:layout_width="match_parent"

android:layout_height="match_parent"/>

四、定位功能接入

1.MainActivity实现OnMapReadyCallback接口

2. onCreate中添加代码getMapAsync

3. onMapReady回调中动态申请权限，然后调用定位，显示地图

package com.suelee.mapsimport android.Manifestimport android.annotation.SuppressLintimport android.content.pm.PackageManagerimport android.location.Locationimport android.os.Buildimport androidx.appcompat.app.AppCompatActivityimport android.os.Bundleimport android.os.Looperimport android.util.Logimport androidx.core.app.ActivityCompatimport androidx.core.content.ContextCompatimport com.google.android.gms.location.*import com.google.android.gms.maps.CameraUpdateFactoryimport com.google.android.gms.maps.GoogleMapimport com.google.android.gms.maps.OnMapReadyCallbackimport com.google.android.gms.maps.SupportMapFragmentimport com.google.android.gms.maps.model.*class MainActivity : AppCompatActivity(), OnMapReadyCallback {//定位clientprivate lateinit var fusedLocationProviderClient: FusedLocationProviderClientprivate var map:GoogleMap? = nullprivate var currentLocation : Location? = null//当前定位marker点private var currentMarker: Marker? = nullval REQUEST_PHOTO_CODE = 3002 //获取权限override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.activity_main);fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)val mapFragment : SupportMapFragment = supportFragmentManager.findFragmentById(R.id.map) as SupportMapFragmentmapFragment.getMapAsync(this)}@SuppressLint("MissingPermission")override fun onMapReady(googleMap: GoogleMap) {map = googleMapgoogleMap.mapType = GoogleMap.MAP_TYPE_HYBRIDval permission = arrayOf(Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION)requestPermission(permission, REQUEST_PHOTO_CODE)googleMap.isIndoorEnabled = true}@SuppressLint("MissingPermission")private fun startLocationUpdates(){fusedLocationProviderClient.requestLocationUpdates(LocationRequest.create().setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)//设置高精度.setInterval(3000), //3秒一次定位请求locationCallback,Looper.getMainLooper())}//定位回调private val locationCallback = object : LocationCallback(){override fun onLocationResult(locationResult: LocationResult) {for (location in locationResult.locations){drawLocationMarker(location, LatLng(location.latitude,location.longitude))}}}@SuppressLint("NewApi")private fun drawLocationMarker(location: Location, latLng: LatLng) {if (currentLocation == null){//第一次定位画定位markercurrentMarker = map?.addMarker(MarkerOptions().position( latLng).title("Marker")//.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_vehicle_location)))map?.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,14f))}else{val deltaTime = location.time - currentLocation!!.time//有方位精度if (location.hasBearingAccuracy()){if (deltaTime <= 0){map?.animateCamera(CameraUpdateFactory.newCameraPosition(CameraPosition.Builder().target(latLng).zoom(map?.cameraPosition!!.zoom).bearing(location.bearing).build()))}else{map?.animateCamera(CameraUpdateFactory.newCameraPosition(CameraPosition.Builder().target(latLng).zoom(map?.cameraPosition!!.zoom).bearing(location.bearing).build()), deltaTime.toInt(),null)}currentMarker?.rotation = 0f}else{if (deltaTime <= 0){map?.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,map?.cameraPosition!!.zoom))}else{map?.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,map?.cameraPosition!!.zoom), deltaTime.toInt(), null)}//设置marker的指针方向currentMarker?.rotation = location.bearing - (map?.cameraPosition?.bearing ?:0f)}}currentLocation = location}private fun stopLocationUpdates(){fusedLocationProviderClient.removeLocationUpdates(locationCallback)}override fun onDestroy() {super.onDestroy()stopLocationUpdates()}///----------/*** 动态获权* *//*** 动态获权请求值*/private var REQUEST_CODE_PERMISSION = 0x00099protected val TAG = this.javaClass.simpleName/*** 请求权限* 动态获权* @param permissions 请求的权限* @param requestCode 请求权限的请求码*/open fun requestPermission(permissions: Array<String>,requestCode: Int) {REQUEST_CODE_PERMISSION = requestCodeif (checkPermissions(permissions)) {permissionSuccess(REQUEST_CODE_PERMISSION)} else {try {val needPermissions =getDeniedPermissions(permissions)ActivityCompat.requestPermissions(this,needPermissions.toTypedArray(),REQUEST_CODE_PERMISSION)} catch (e: Exception) {Log.e("BaseActivity", "获取权限失败 Exception = $e")}}}/*** 检测所有的权限是否都已授权*/fun checkPermissions(permissions: Array<String>): Boolean {if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {return true}for (permission in permissions) {if (ContextCompat.checkSelfPermission(this,permission) != PackageManager.PERMISSION_GRANTED) {return false}}return true}/*** 获取权限集中需要申请权限的列表*/fun getDeniedPermissions(permissions: Array<String>): List<String> {val needRequestPermissionList: MutableList<String> =ArrayList()for (permission in permissions) {if (ContextCompat.checkSelfPermission(this, permission) !=PackageManager.PERMISSION_GRANTED ||ActivityCompat.shouldShowRequestPermissionRationale(this, permission)) {needRequestPermissionList.add(permission)}}return needRequestPermissionList}/*** 系统请求权限回调*/override fun onRequestPermissionsResult(requestCode: Int,permissions: Array<String?>,grantResults: IntArray) {super.onRequestPermissionsResult(requestCode, permissions, grantResults)if (requestCode == REQUEST_CODE_PERMISSION) {if (verifyPermissions(grantResults)) {permissionSuccess(REQUEST_CODE_PERMISSION)} else {permissionFail(REQUEST_CODE_PERMISSION)}}}/*** 确认所有的权限是否都已授权*/fun verifyPermissions(grantResults: IntArray): Boolean {for (grantResult in grantResults) {if (grantResult != PackageManager.PERMISSION_GRANTED) {return false}}return true}/*** 获取权限成功*/open fun permissionSuccess(requestCode: Int) {Log.e(TAG, "获取权限成功=$requestCode")startLocationUpdates()}/*** 权限获取失败*/open fun permissionFail(requestCode: Int) {Log.e(TAG, "获取权限失败=$requestCode")}}

4.运行，真机需要安装google 服务才可以，国内手机基本不行。

五、常见问题

1.manifest merger faild:Apps targeting Android 12 and higher are required to specify an explicit…

解决：根据提示在AndroidManifest.xml文件中给activity添加: android:exported="true"

六、参考文献

1. Google官方文档：

https://developers.google.com/maps/documentation/android-api/map?hl=zh-cn

2. Google官方文档

https://developers.google.com/maps/documentation/android-sdk/config?hl=zh-cn

3. Android使用GoogleMap实现定位及定位回正_Tobey_r1的博客-CSDN博客_google map 定位

4. https://blog.51cto.com/u_15360378/3808483

5. 示例源代码：

git@github.com:sueleeyu/android-maps.git