[Flutter] Google API MAP, Geolocator

Geolocator plugin will apply geo-location information.

you should check and request permission.

you should receive GPS location change information.

you should calculate distance your location to your purpose object.

path : https://pub.dev/packages/geolocator

geolocator | Flutter Package

flutter pub add geolocator

 

 

your device possibled location function.

  void checkLocationEnabled() async {
    final isLocationEnabled = await Geolocator.isLocationServiceEnabled();

    print('checkLocationEnabled.. isLocationEnabled:$isLocationEnabled');
  }

 

observe current location.

Make sure at least ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION 

    Geolocator.getPositionStream().listen((Position event) {
      print('event:$event')
    },);

 

 

check permissions

    final isPermissionLocationGranted = await Geolocator.checkPermission();
    final requestPermissionLocation = await Geolocator.requestPermission();
    print('checkLocationEnabled.. isPermissionLocationGranted:$isPermissionLocationGranted');
    print('checkLocationEnbaled.. requestPermissionLocation:$requestPermissionLocation');

 

 

 

connect Google API

https://console.cloud.google.com/

Google 클라우드 플랫폼

 

create new project.

 

search 'Google Maps Platform'.

 

 

find title API in left banner.

install Android For SDK

register your app package name and SHA-1.

keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android

 

if occur error message 

keytool 오류: java.lang.Exception: 키 저장소 파일이 존재하지 않음: ~/.android/debug.keystore
java.lang.Exception: 키 저장소 파일이 존재하지 않음: ~/.android/debug.keystore
        at java.base/sun.security.tools.keytool.Main.doCommands(Main.java:923)
        at java.base/sun.security.tools.keytool.Main.run(Main.java:423)
        at java.base/sun.security.tools.keytool.Main.main(Main.java:416)

https://developer.android.com/studio/publish/app-signing?hl=ko

앱 서명  |  Android 스튜디오  |  Android Developers

 

 

and check Google Map API key

 

and add package google_maps_flutter

flutter pub add google_maps_flutter

 

 

permission and meta-data setting

path : android/app/src/main/AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <permission android:name="android.permission.INTERNET"/>
    <permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <application
        android:label="chool_check"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_launcher">

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="[API KEY]" />

 

 

check google map latitude(위도), longitude(경도).

https://www.google.co.kr/maps/?hl=ko

Google 지도