Flutter calls Gaode map app to realize location search, route planning and reverse geocoding

1 The development of preparation

pubspec.yaml Add a plug-in to the configuration file

dependencies:
  flutter:
    sdk: flutter
  url_launcher: ^6.1.2

iOS To configure info.plist

<key>LSApplicationQueriesSchemes</key>
<array>
	<string>iosamap</string>
	<string>baidumap</string>
</array>

2 Flutter Turn up the Gaud map - Search location Reverse geocoding

Gaode map development document

     static Future<bool> openAmap(
      double longitude,
      double latitude, {
    
        String? address,
        String? title,
        bool showErr = true,
      }) async {
    
    String url =
        '${
    Platform.isAndroid ? 'android' : 'ios'}amap://viewReGeo?sourceApplication=${
    title??""}&lat=$latitude&lon=$longitude&dev=0';
    if (Platform.isIOS) url = Uri.encodeFull(url);
    try {
    
      if (await canLaunchUrlString(url)) {
    
        await launchUrlString(url);
        return true;
      } else {
    
        if (showErr) showToastCommon(' Unable to adjust Gaode map ');
        return false;
      }
    } on Exception catch (e) {
    
      if (showErr) showToastCommon(' Unable to adjust Gaode map ');
      return false;
    }
  }

In fact, it is called Gaode map open api Reverse address resolution

The results are as follows ：

3 Coordinate type selection

It should be noted that dev Value of coordinate type

• 0 The longitude and latitude are encrypted , No need for national test encryption ;
• 1 Using latitude and longitude is unencrypted , Need national test encryption ;

If you do not pass the correct coordinate type parameter , It will cause the location coordinates to shift . The default is bd09 Latitude and longitude coordinates .

4 Flutter Turn up the Gaud map - Navigation Route planning

Gaode map development document

///  Goth map calls   Navigation 
  static Future<bool> openAmapNav(
    double longitude,
    double latitude, {
    
    String? address,
    bool showErr = true,
  }) async {
    
    String url =
        '${
    Platform.isAndroid ? 'android' : 'ios'}amap://navi?sourceApplication=amap&lat=$latitude&lon=$longitude&dev=0&style=2&poiname=${
    address ?? ''}';
    if (Platform.isIOS) url = Uri.encodeFull(url);
    try {
    
      if (await canLaunchUrlString(url)) {
    
        await launchUrlString(url);
        return true;
      } else {
    
        if (showErr) showToastCommon(' Unable to adjust Gaode map ');
        return false;
      }
    } on Exception catch (e) {
    
      if (showErr) showToastCommon(' Unable to adjust Gaode map ');
      return false;
    }
  }

It's actually called

5 The prompt box uses GetX frame

  static showToastCommon(String message) {
    
    Get.defaultDialog(
        title: " Tips ",
        middleText: message,
        backgroundColor: Colors.white,
        titleStyle: const TextStyle(color: Colors.black),
        middleTextStyle: const TextStyle(color: Colors.red),
        textConfirm: " got it ",
        confirmTextColor: Colors.white,
        onConfirm: () {
    
          Get.back();
        },
        radius: 8);
  }
}