HMS Core定位服务在生活服务类App中可以自动填写收货地址啦

在涉及团购、外卖、快递、家政、物流、搬家等生活服务类的App、小程序中，填写收货地址是用户高频使用的功能。这一功能通常采取让用户手动填写的解决方案，例如上下拉动选择浙江省-->杭州市-->西湖区-->西溪街道，再切换到姓名输入框输入姓名-->电话输入框输入电话等一系列的操作。从中我们不难发现手动输入地址不仅费时费力，而且一不小心还会出现选错地址的现象。

那有没有什么方法能帮助用户又快又准确的填写地址呢？借助HMS Core 定位服务的融合定位+地理编码能力，生活服务类App可以自动定位获取用户当前位置信息或某地的行政区划信息、街道信息，并准确填写至地址栏中。用户无需自己手动输入，减少了操作时间，并且不用再担心填错地址。以下是我们提供的示例代码，开发者们按照步骤尝试，就可以轻松体验这个功能啦~

效果展示

开发实战

开发步骤

一、 开发准备

1. 登录AppGallery Connect网站，点击“我的项目”。找到您的项目在API管理开启location开关,在项目中点击需要配置签名证书指纹的应用。在“项目设置 > 常规”页面的“应用”区域，点击“SHA256证书指纹”后的“添加证书指纹”，输入生成的SHA256指纹。

2. 在“项目设置 > 常规”页面的“应用”区域，点击“agconnect-services.json”下载配置文件。将“agconnect-services.json”文件拷贝到应用级根目录下。

3. 项目级“build.gradle”文件

buildscript { repositories { google() jcenter() maven { url 'https://developer.huawei.com/repo/' } mavenCentral() } dependencies { classpath 'com.android.tools.build:gradle:4.1.2' classpath 'com.huawei.agconnect:agcp:1.6.0.300' } } allprojects { repositories { maven { url 'https://developer.huawei.com/repo/' } google() jcenter() mavenCentral() } } 

应用级的“build.gradle”文件

plugins { id 'com.android.application' id 'com.huawei.agconnect' } 

在“dependencies ”中添加如下编译依赖

implementation 'com.huawei.hms:location:6.3.0.300' 

二、 权限检查

1. 在“AndroidManifest.xml”文件中配置权限ACCESS_COARSE_LOCATION（粗略的位置权限），ACCESS_FINE_LOCATION（精确的位置权限）和ACCESS_BACKGROUND_LOCATION权限

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

2. 动态申请定位相关权限（Android 6.0及以上版本危险权限要求）

 Log.i(TAG, "android sdk < 28 Q"); if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { String[] strings = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}; ActivityCompat.requestPermissions(this, strings, 1); } } else { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, "android.permission.ACCESS_BACKGROUND_LOCATION") != PackageManager.PERMISSION_GRANTED) { String[] strings = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, "android.permission.ACCESS_BACKGROUND_LOCATION"}; ActivityCompat.requestPermissions(this, strings, 2); } } 

三、 获取定位结果

1. 设置定位参数，包括位置更新的间隔，定位类型等

mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); mSettingsClient = LocationServices.getSettingsClient(this); mLocationRequest = new LocationRequest(); // Sets the interval for location update (unit: Millisecond) mLocationRequest.setInterval(5000); // Sets the priority mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); 

2. 调用getSettingsClient()接口获取SettingsClient实例。调用调用checkLocationSettings()检查设备开关设置

LocationSettingsRequest locationSettingsRequest = builder.build(); // Before requesting location update, invoke checkLocationSettings to check device settings. Task<LocationSettingsResponse> locationSettingsResponseTask = mSettingsClient.checkLocationSettings(locationSettingsRequest); 

检查开关开启之后 ，调用requestLocationUpdates()进行定位

locationSettingsResponseTask.addOnSuccessListener(new OnSuccessListener<LocationSettingsResponse>() { @Override public void onSuccess(LocationSettingsResponse locationSettingsResponse) { Log.i(TAG, "check location settings success"); mFusedLocationProviderClient .requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.getMainLooper()) .addOnSuccessListener(new OnSuccessListener<Void>() { @Override public void onSuccess(Void aVoid) { Log.i(TAG, "requestLocationUpdatesWithCallback onSuccess"); } }) .addOnFailureListener(new OnFailureListener() { @Override public void onFailure(Exception e) { Log.e(TAG, "requestLocationUpdatesWithCallback onFailure:" + e.getMessage()); } }); } }).addOnFailureListener(new OnFailureListener() { @Override public void onFailure(Exception e) { Log.e(TAG, "checkLocationSetting onFailure:" + e.getMessage()); int statusCode = 0; if (e instanceof ApiException) { statusCode = ((ApiException) e).getStatusCode(); } switch (statusCode) { case LocationSettingsStatusCodes.RESOLUTION_REQUIRED: try { // When the startResolutionForResult is invoked, a dialog box is displayed, asking you // to open the corresponding permission. if (e instanceof ResolvableApiException) { ResolvableApiException rae = (ResolvableApiException) e; rae.startResolutionForResult(MainActivity.this, 0); } } catch (IntentSender.SendIntentException sie) { Log.e(TAG, "PendingIntent unable to execute request."); } break; default: break; } } }); 

四、 逆地理编码获取当前位置

成功获取定位信息的经纬度之后，将经纬度信息传递给使用地理编码服务（GeocoderService）获得地理编码请求对象，然后调用请求逆地理编码方法（getFromLocation），设置请求（GetFromLocationRequest）参数，获取逆地理编码信息回调。

if (null == mLocationCallback) { mLocationCallback = new LocationCallback() { @Override public void onLocationResult(LocationResult locationResult) { if (locationResult != null) { List<Location> locations = locationResult.getLocations(); if (!locations.isEmpty()) { ExecutorUtil.getInstance().execute(new Runnable() { @Override public void run() { Locale locale = new Locale("zh", "CN"); GeocoderService geocoderService = LocationServices.getGeocoderService(MainActivity.this, locale); GetFromLocationRequest getFromLocationRequest = new GetFromLocationRequest(locations.get(0).getLatitude(), locations.get(0).getLongitude(), 1); geocoderService.getFromLocation(getFromLocationRequest) .addOnSuccessListener(new OnSuccessListener<List<HWLocation>>() { @Override public void onSuccess(List<HWLocation> hwLocation) { printGeocoderResult(hwLocation); } }) .addOnFailureListener(new OnFailureListener() { @Override public void onFailure(Exception e) { Log.i(TAG, e.getMessage()); } }); } }); } } } @Override public void onLocationAvailability(LocationAvailability locationAvailability) { if (locationAvailability != null) { boolean flag = locationAvailability.isLocationAvailable(); Log.i(TAG, "onLocationAvailability isLocationAvailable:" + flag); } } }; } 

最后将获取到的结果显示在界面上即可。

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