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>() {@Overridepublic void onSuccess(LocationSettingsResponse locationSettingsResponse) {Log.i(TAG, "check location settings success");mFusedLocationProviderClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.getMainLooper()).addOnSuccessListener(new OnSuccessListener<Void>() {@Overridepublic void onSuccess(Void aVoid) {Log.i(TAG, "requestLocationUpdatesWithCallback onSuccess");}}).addOnFailureListener(new OnFailureListener() {@Overridepublic void onFailure(Exception e) {Log.e(TAG, "requestLocationUpdatesWithCallback onFailure:" + e.getMessage());}});}
}).addOnFailureListener(new OnFailureListener() {@Overridepublic 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() {@Overridepublic void onLocationResult(LocationResult locationResult) {if (locationResult != null) {List<Location> locations = locationResult.getLocations();if (!locations.isEmpty()) {ExecutorUtil.getInstance().execute(new Runnable() {@Overridepublic 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>>() {@Overridepublic void onSuccess(List<HWLocation> hwLocation) {printGeocoderResult(hwLocation);}}).addOnFailureListener(new OnFailureListener() {@Overridepublic void onFailure(Exception e) {Log.i(TAG, e.getMessage());}});}});}}}@Overridepublic 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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