add method
Implementation
Future<void> add() async {
final localPropertyFile = File(join(root, 'android', 'local.properties'));
final lines = await localPropertyFile.readAsLines();
final keyValues = {
'UMENG_APPKEY': umengAppKey,
'UMENG_MESSAGE_SECRET': umengMessageSecret,
'UMENG_CHANNEL': umengChannel,
};
keyValues.forEach((key, value) {
final index = lines.indexWhere((element) => element.startsWith(key));
if (index == -1) {
lines.add('$key=$value');
} else {
lines[index] = '$key=$value';
}
});
await localPropertyFile.writeAsString(lines.join('\n'));
}