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实时定位,曾经成为利用必备能力之一,尤其是导航利用,更须要疾速精确定位用户实时地位。
华为定位服务可能赋予应用程序疾速、精准地获取用户地位信息的能力,同时定位服务助力寰球开发者实现个性化地图出现与交互,全面晋升利用的 LBS 体验。
上面为您具体解析,华为定位服务与地图服务如何实现利用实时定位。
预期性能
获取实时定位,并且在地图上显示地位点,首次启动跳转以后地位点,并且地位扭转以后地位点和地图视角随之扭转。
应用能力
华为定位服务: 根底定位
华为地图服务:地图显示
实现原理
应用华为定位服务获取实时地位,在地图上显示“我的地位”按钮,在地位变动时,跳转地图到以后定位。
筹备工作
AGC 账号注册,我的项目创立
- 注册成为开发者
注册地址:
https://developer.huawei.com/…
- 创立利用,增加 sha256,开启 map/site 开关,下载 json 文件
https://developer.huawei.com/…
- 配置 android studio 工程
1) 将“agconnect-services.json”文件拷贝到利用级根目录下
· 在“allprojects > repositories”中配置 HMS Core SDK 的 Maven 仓地址。
· 在“buildscript > repositories”中配置 HMS Core SDK 的 Maven 仓地址。
· 如果 App 中增加了“agconnect-services.json”文件则须要在“buildscript > dependencies”中减少 agcp 配置。
buildscript {
repositories {maven { url 'https://developer.huawei.com/repo/'}
google()
jcenter()}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.2'
classpath 'com.huawei.agconnect:agcp:1.3.1.300'
}
}
allprojects {
repositories {maven { url 'https://developer.huawei.com/repo/'}
google()
jcenter()}
}
2) 在“dependencies”中增加如下编译依赖
dependencies {implementation 'com.huawei.hms:maps:{version}'
implementation 'com.huawei.hms:location:{version}'
}
3) 在文件头增加配置apply plugin: 'com.huawei.agconnect'
4) 在 android 中配置签名。将生成签名证书指纹生成的签名文件复制到您工程的 app 目录下,并在“build.gradle”文件中配置签名
signingConfigs {
release {
// 签名证书
storeFile file("**.**")
// 密钥库口令
storePassword "******"
// 别名
keyAlias "******"
// 密钥口令
keyPassword "******"
v2SigningEnabled true
v2SigningEnabled true
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
debuggable true
}
debug {debuggable true}
}
要害代码实现
1) 编写一个 service 获取实时定位。
public class LocationService extends Service {private final String TAG = this.getClass().getSimpleName();
List<ILocationChangedLister> locationChangedList = new ArrayList<>();
// location
private FusedLocationProviderClient fusedLocationProviderClient;
private LocationRequest mLocationRequest;
private final LocationCallback mLocationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {super.onLocationResult(locationResult);
locationResult.getLocations();
Log.d(TAG, "onLocationResult:" + locationResult);
Location location = locationResult.getLocations().get(0);
Log.w(TAG, "onLocationResult:Latitude" + location.getLatitude());
Log.w(TAG, "onLocationResult:Longitude" + location.getLongitude());
for (ILocationChangedLister locationChanged : locationChangedList) {locationChanged.locationChanged(new LatLng(location.getLatitude(), location.getLongitude()));
}
}
@Override
public void onLocationAvailability(LocationAvailability locationAvailability) {super.onLocationAvailability(locationAvailability);
Log.d(TAG, "onLocationAvailability:" + locationAvailability.toString());
}
};
private final MyBinder binder = new MyBinder();
private final Random generator = new Random();
@Nullable
@Override
public IBinder onBind(Intent intent) {return binder;}
@Override
public void onCreate() {Log.i("DemoLog", "TestService -> onCreate, Thread:" + Thread.currentThread().getName());
super.onCreate();}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("DemoLog",
"TestService -> onStartCommand, startId:" + startId + ", Thread:" + Thread.currentThread().getName());
return START_NOT_STICKY;
}
@Override
public boolean onUnbind(Intent intent) {Log.i("DemoLog", "TestService -> onUnbind, from:" + intent.getStringExtra("from"));
return false;
}
@Override
public void onDestroy() {Log.i("DemoLog", "TestService -> onDestroy, Thread:" + Thread.currentThread().getName());
super.onDestroy();}
public int getRandomNumber() {return generator.nextInt();
}
public void addLocationChangedlister(ILocationChangedLister iLocationChangedLister) {locationChangedList.add(iLocationChangedLister);
}
public void getMyLoction() {Log.d(TAG, "getMyLoction:");
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
SettingsClient settingsClient = LocationServices.getSettingsClient(this);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
mLocationRequest = new LocationRequest();
builder.addLocationRequest(mLocationRequest);
LocationSettingsRequest locationSettingsRequest = builder.build();
// location setting
settingsClient.checkLocationSettings(locationSettingsRequest)
.addOnSuccessListener(locationSettingsResponse -> fusedLocationProviderClient
.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.getMainLooper())
.addOnSuccessListener(aVoid -> Log.d(TAG, "onSuccess:" + aVoid)))
.addOnFailureListener(Throwable::printStackTrace);
}
public class MyBinder extends Binder {public LocationService getService() {return LocationService.this;}
}
public interface ILocationChangedLister {
/**
* Update the location information
*
* @param latLng The new location information
*/
public void locationChanged(LatLng latLng);
}
}
2) 在 Activity 中绘制地图,监听实时地位
Xml 中增加地图:
<com.huawei.hms.maps.MapView
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" />
activity 地图绘制:
mapView.onCreate(null);
mapView.getMapAsync(this);
绘制是关上我的地位 按钮显示
@Override
public void onMapReady(HuaweiMap huaweiMap) {
hMap = huaweiMap;
hMap.setMyLocationEnabled(true);
}
设置定位服务绑定监听
private ServiceConnection conn = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder binder) {
isBound = true;
if (binder instanceof LocationService.MyBinder) {LocationService.MyBinder myBinder = (LocationService.MyBinder) binder;
locationService = myBinder.getService();
Log.i(TAG, "ActivityA onServiceConnected");
locationService.addLocationChangedlister(iLocationChangedLister);
locationService.getMyLoction();}
}
@Override
public void onServiceDisconnected(ComponentName name) {
isBound = false;
locationService = null;
Log.i(TAG, "ActivityA onServiceDisconnected");
}
};
绑定到 LocationService:
private void bindLocationService() {Intent intent = new Intent(mActivity, LocationService.class);
intent.putExtra("from", "ActivityA");
Log.i(TAG, "-------------------------------------------------------------");
Log.i(TAG, "bindService to ActivityA");
mActivity.bindService(intent, conn, Context.BIND_AUTO_CREATE);
}
在地位变动监听中解决 地位扭转
LocationService.ILocationChangedLister iLocationChangedLister = new LocationService.ILocationChangedLister() {
@Override
public void locationChanged(LatLng latLng) {Log.d(TAG, "locationChanged:" + latLng.latitude);
Log.d(TAG, "locationChanged:" + latLng.longitude);
updateLocation(latLng);
}
};
更新地图 经纬度视角
private void updateLocation(LatLng latLng) {
mLatLng = latLng;
hMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, 1));
}
测试
应用模仿地位软件扭转模仿地位,地图视角和我的地位按钮能够随之跳动。性能实现。
欲了解 HMS Core 更多详情,请参阅:
华为开发者联盟官网
获取开发领导文档
参加开发者探讨请到 CSDN 社区或者 Reddit 社区
下载 demo 和示例代码请到 Github 或者 Gitee
解决集成问题请到 Stack Overflow
原文链接:https://developer.huawei.com/…
原作者:HMS Core 官网帐号