让我告诉你我想要的过程和正在发生的事情
**过程：**按ElevatedButton，然后显示adScreenLoadingDialog，直到_isAdLoaded=true，然后显示广告并转到下一屏幕。
正在发生的事情：有两个条件：
首先，如果用户打开屏幕并滚动或等待大约5秒，然后点击ElevatedButton，该过程工作正常，一切正常。
其次，如果用户打开屏幕并立即点击ElevatedButton，则adScreenLoadingDialog出现，但过程停止，因为_isAdLoaded还不是真的，过程出错。
**我需要您的帮助：**如何使onPressed显示adScreenLoadingDialog，并等待_isAdLoaded变为真，以便广告可以显示并转到下一个屏幕。
我尝试使用while循环，但它不工作。
如果有人能帮忙我真的很感激。
谢谢
这是我的屏幕代码
import 'package:flutter/material.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';
class BusTest extends StatefulWidget {
@override
_BusTestState createState() => _BusTestState();
}
class _BusTestState extends State<BusTest> {
////////////////////ADS////////////////
InterstitialAd _interstitialAd;
bool _isAdLoaded = false;
///ToDo Interstitial Ad Unite
void _initAd() {
InterstitialAd.load(
adUnitId: 'ca-app-pub-3940256099942544/1033173712',
request: AdRequest(),
adLoadCallback: InterstitialAdLoadCallback(
onAdLoaded: onAdLoaded,
onAdFailedToLoad: (error) {
print(error);
},
),
);
}
void onAdLoaded(InterstitialAd ad) {
_interstitialAd = ad;
_isAdLoaded = true;
_interstitialAd.fullScreenContentCallback = FullScreenContentCallback(
onAdDismissedFullScreenContent: (ad) {
_initAd();
//_interstitialAd.dispose();
},
onAdFailedToShowFullScreenContent: (ad, error) {
_initAd();
//_interstitialAd.dispose();
},
);
}
////////////////////ADS////////////////
@override
void initState() {
super.initState();
_initAd();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: Text(
"Bus Test",
style: TextStyle(
fontSize: 20,
),
),
),
body: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Padding(
padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 16),
child: Column(
children: [
ElevatedButton(
style: ButtonStyle(
shape: MaterialStateProperty.all(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
),
maximumSize: MaterialStateProperty.resolveWith(
(states) {
if (states.contains(MaterialState.disabled)) {
return Size(double.infinity, 60);
}
return Size(double.infinity, 60);
},
),
padding: MaterialStateProperty.all(EdgeInsets.all(0)),
backgroundColor: MaterialStateProperty.resolveWith(
(states) {
// If the button is pressed, return green, otherwise blue
if (states.contains(MaterialState.pressed)) {
return Color(0xff795368);
}
return Color(0xff3E2A35);
},
),
),
onPressed: () async {
adScreenLoadingDialog(context);
if (_isAdLoaded) {
await _interstitialAd.show();
Navigator.pop(context);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => BusTest1(),
),
);
}
},
child: Container(
height: 40,
child: Center(
child: Text(
'Bus Test 1',
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
),
textAlign: TextAlign.center,
),
),
),
),
SizedBox(
height: 10,
),
ElevatedButton(
style: ButtonStyle(
shape: MaterialStateProperty.all(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
),
maximumSize: MaterialStateProperty.resolveWith(
(states) {
if (states.contains(MaterialState.disabled)) {
return Size(double.infinity, 60);
}
return Size(double.infinity, 60);
},
),
padding: MaterialStateProperty.all(EdgeInsets.all(0)),
backgroundColor: MaterialStateProperty.resolveWith(
(states) {
// If the button is pressed, return green, otherwise blue
if (states.contains(MaterialState.pressed)) {
return Color(0xff795368);
}
return Color(0xff3E2A35);
},
),
),
onPressed: () async {
adScreenLoadingDialog(context);
if (_isAdLoaded) {
await _interstitialAd.show();
Navigator.pop(context);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => BusTest2(),
),
);
}
},
child: Container(
height: 40,
child: Center(
child: Text(
'Bus Test 2',
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
),
textAlign: TextAlign.center,
),
),
),
),
SizedBox(
height: 10,
),
ElevatedButton(
style: ButtonStyle(
shape: MaterialStateProperty.all(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
),
maximumSize: MaterialStateProperty.resolveWith(
(states) {
if (states.contains(MaterialState.disabled)) {
return Size(double.infinity, 60);
}
return Size(double.infinity, 60);
},
),
padding: MaterialStateProperty.all(EdgeInsets.all(0)),
backgroundColor: MaterialStateProperty.resolveWith(
(states) {
// If the button is pressed, return green, otherwise blue
if (states.contains(MaterialState.pressed)) {
return Color(0xff795368);
}
return Color(0xff3E2A35);
},
),
),
onPressed: () async {
adScreenLoadingDialog(context);
if (_isAdLoaded) {
await _interstitialAd.show();
Navigator.pop(context);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => BusTest3(),
),
);
}
},
child: Container(
height: 40,
child: Center(
child: Text(
'Bus Test 3',
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
),
textAlign: TextAlign.center,
),
),
),
),
SizedBox(
height: 10,
),
],
),
),
],
),
),
);
}
}
adScreenLoadingDialog(context) {
return showDialog(
barrierDismissible: false,
context: context,
builder: (context) {
return AlertDialog(
elevation: 0,
backgroundColor: Colors.transparent,
content: Container(
height: 100,
width: 100,
child: SpinKitCircle(
color: Color(0xffd88820),
size: 100,
),
),
);
});
}所以
1条答案
按热度按时间gfttwv5a1#
由于您只想让
onPressed显示adScreenLoadingDialog，并等待_isAdLoaded变为true，因此可以使用此Function添加延迟，直到_isAdLoaded变为true。像这样将其添加到
onPressed中，您也可以使用
Completer，但这需要更多的代码更改。另外，将
_isAdLoaded = true;Package 为setState((){})，