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Implemented Null Safety.

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This commit is contained in:
Phani Pavan K
2021-02-18 15:41:13 +05:30
parent 56f5210712
commit 0e792ea48f
10 changed files with 402 additions and 39 deletions
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22
example/lib/main.dart
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@@ -22,7 +22,7 @@ class MyApp extends StatelessWidget {
class LoginPage extends StatefulWidget {
final VoidCallback _onSignIn;
LoginPage({@required onSignIn})
LoginPage({required onSignIn})
: assert(onSignIn != null),
_onSignIn = onSignIn;
@@ -40,13 +40,13 @@ class _LoginPageState extends State<LoginPage> {
bool _isInvalidAsyncUser = false; // managed after response from server
bool _isInvalidAsyncPass = false; // managed after response from server
String _username;
String _password;
String? _username;
String? _password;
bool _isLoggedIn = false;
// validate user name
String _validateUserName(String userName) {
if (userName.length < 8) {
String? _validateUserName(String? userName) {
if (userName!.length < 8) {
return 'Username must be at least 8 characters';
}
@@ -60,8 +60,8 @@ class _LoginPageState extends State<LoginPage> {
}
// validate password
String _validatePassword(String password) {
if (password.length < 8) {
String? _validatePassword(String? password) {
if (password!.length < 8) {
return 'Password must be at least 8 characters';
}
@@ -75,8 +75,8 @@ class _LoginPageState extends State<LoginPage> {
}
void _submit() {
if (_loginFormKey.currentState.validate()) {
_loginFormKey.currentState.save();
if (_loginFormKey.currentState!.validate()) {
_loginFormKey.currentState!.save();
// dismiss keyboard during async call
FocusScope.of(context).requestFocus(new FocusNode());
@@ -154,7 +154,7 @@ class _LoginPageState extends State<LoginPage> {
key: Key('username'),
decoration: InputDecoration(
hintText: 'enter username', labelText: 'User Name'),
style: TextStyle(fontSize: 20.0, color: textTheme.button.color),
style: TextStyle(fontSize: 20.0, color: textTheme.button!.color),
validator: _validateUserName,
onSaved: (value) => _username = value,
),
@@ -166,7 +166,7 @@ class _LoginPageState extends State<LoginPage> {
obscureText: true,
decoration: InputDecoration(
hintText: 'enter password', labelText: 'Password'),
style: TextStyle(fontSize: 20.0, color: textTheme.button.color),
style: TextStyle(fontSize: 20.0, color: textTheme.button!.color),
validator: _validatePassword,
onSaved: (value) => _password = value,
),