HMS Core定位服務在生活服務類App中可以自動填寫收貨地址啦
在涉及團購、外賣、快遞、家政、物流、搬家等生活服務類的App、小程式中，填寫收貨地址是使用者高頻使用的功能。這一功能通常採取讓使用者手動填寫的解決方案，例如上下拉動選擇浙江省-->杭州市-->西湖區-->西溪街道，再切換到姓名輸入框輸入姓名-->電話輸入框輸入電話等一系列的操作。從中我們不難發現手動輸入地址不僅費時費力，而且一不小心還會出現選錯地址的現象。
那有沒有什麼方法能幫助使用者又快又準確的填寫地址呢？藉助HMS Core 定位服務的融合定位+地理編碼能力，生活服務類App可以自動定位獲取使用者當前位置資訊或某地的行政區劃資訊、街道資訊，並準確填寫至位址列中。使用者無需自己手動輸入，減少了操作時間，並且不用再擔心填錯地址。以下是我們提供的示例程式碼，開發者們按照步驟嘗試，就可以輕鬆體驗這個功能啦~
效果展示
開發實戰
開發步驟
一、 開發準備
1. 登入AppGallery Connect網站，點選“我的專案”。找到您的專案在API管理開啟location開關,在專案中點選需要配置簽名證書指紋的應用。在“專案設定 > 常規”頁面的“應用”區域，點選“SHA256證書指紋”後的“新增證書指紋”，輸入生成的SHA256指紋。
2. 在“專案設定 > 常規”頁面的“應用”區域，點選“agconnect-services.json”下載配置檔案。將“agconnect-services.json”檔案拷貝到應用級根目錄下。
3. 專案級“build.gradle”檔案
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() } }
應用級的“build.gradle”檔案
plugins {
id 'com.android.application'
id 'com.huawei.agconnect'
}
在“dependencies ”中新增如下編譯依賴
implementation 'com.huawei.hms:location:6.3.0.300'
二、 許可權檢查
1. 在“AndroidManifest.xml”檔案中配置許可權ACCESS_COARSE_LOCATION（粗略的位置許可權），ACCESS_FINE_LOCATION（精確的位置許可權）和ACCESS_BACKGROUND_LOCATION許可權
<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. 動態申請定位相關許可權（Android 6.0及以上版本危險許可權要求）
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、 獲取定位結果
1. 設定定位引數，包括位置更新的間隔，定位型別等
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. 呼叫getSettingsClient()介面獲取SettingsClient例項。呼叫呼叫checkLocationSettings()檢查裝置開關設定
LocationSettingsRequest locationSettingsRequest = builder.build();
// Before requesting location update, invoke checkLocationSettings to check device settings.
Task<LocationSettingsResponse> locationSettingsResponseTask =
mSettingsClient.checkLocationSettings(locationSettingsRequest);
```
檢查開關開啟之後 ，呼叫requestLocationUpdates()進行定位
locationSettingsResponseTask.addOnSuccessListener(new OnSuccessListener
@Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
Log.i(TAG, "check location settings success");
mFusedLocationProviderClient
.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.getMainLooper())
.addOnSuccessListener(new OnSuccessListener
@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、 逆地理編碼獲取當前位置
成功獲取定位資訊的經緯度之後，將經緯度資訊傳遞給使用地理編碼服務（GeocoderService）獲得地理編碼請求物件，然後呼叫請求逆地理編碼方法（getFromLocation），設定請求（GetFromLocationRequest）引數，獲取逆地理編碼資訊回撥。
if (null == mLocationCallback) {
mLocationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
if (locationResult != null) {
List
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
@Override
public void onSuccess(List
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);
}
}
};
}
最後將獲取到的結果顯示在介面上即可。
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