how to update flutter app AndroidManifest.xml meta-data in json data

To update the meta-data element in the AndroidManifest.xml file of your Flutter app with JSON data, you need to follow these steps:

  1. Define your JSON data in a file, either locally in your project or retrieved from an external source. For example, let's say your JSON data looks like this:

    json
    { "my_database_key": "my_database_value" }
  2. Add the meta-data element to your AndroidManifest.xml file, as follows:

    php
    <application> <meta-data android:name="com.example.myapp.MY_DATABASE_KEY" android:value="@string/my_database_value" /> </application>

    Replace MY_DATABASE_KEY with the key of your JSON data, and my_database_value with a placeholder value that will be replaced by your JSON data at runtime.

  3. In your main.dart file, retrieve your JSON data and update the meta-data element:

    javascript
    import 'dart:convert' show json; import 'package:flutter/services.dart' show rootBundle; import 'package:flutter/widgets.dart'; void main() async { // Retrieve JSON data from a file String jsonData = await rootBundle.loadString('assets/my_database.json'); Map<String, dynamic> database = json.decode(jsonData); // Update the meta-data element await updateMetaDataElement( 'com.example.myapp.MY_DATABASE_KEY', database['my_database_key']); runApp(MyApp()); } Future<void> updateMetaDataElement( String elementName, String elementValue) async { final metaElement = findMetaElement(elementName); metaElement.attributes['android:value'] = elementValue; } XmlElement findMetaElement(String elementName) { final AndroidManifest manifest = AndroidManifest.from( File('android/app/src/main/AndroidManifest.xml').readAsStringSync()); final appElement = manifest.manifestElement .findElements('application') .first; return appElement.findElements('meta-data').firstWhere( (element) => element.attributes['android:name'] == elementName, orElse: () => null); }

    In this example, we use the rootBundle class from the flutter/services.dart package to load the JSON data from a file. We then decode the JSON data into a Map object, and retrieve the value of the my_database_key key.

    Next, we define an updateMetaDataElement method that takes the name of the meta-data element to update (elementName) and the new value to set (elementValue). This method uses the findMetaElement method to locate the meta-data element with the specified name, and then updates its android:value attribute.

    The findMetaElement method uses the AndroidManifest class from the flutter_manifest package to parse the AndroidManifest.xml file and locate the meta-data element with the specified name.

    Finally, we call the updateMetaDataElement method with the key and value of our JSON data.

Note: Make sure to import the flutter_manifest package by adding it to your pubspec.yaml file and running flutter pub get.

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