尝试加载插页式广告时 Flutter 应用程序崩溃
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【中文标题】尝试加载插页式广告时 Flutter 应用程序崩溃【英文标题】：Flutter App Crashes when Trying to Load Interstitial Ad 【发布时间】：2021-07-29 00:17:58 【问题描述】：我正在尝试在我的应用中的一个屏幕上放置插页式广告。我的横幅广告效果很好。但是，每当应用尝试加载广告 <_interstitial.load> 时，它就会崩溃。
带有插页式广告的代码：
import 'package:quench/models/achievement.dart';
import 'package:quench/models/user.dart';
import 'package:quench/screens/achievements/achievement_list.dart';
import 'package:flutter/material.dart';
import 'package:quench/services/achievement_data.dart';
import 'package:quench/shared/constants.dart';
import 'package:quench/shared/loading.dart';
import 'package:quench/services/user_data.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';
import 'package:provider/provider.dart';
import 'package:quench/services/ad_state.dart';
class Achievements extends StatefulWidget
@override
_AchievementsState createState() => _AchievementsState();
class _AchievementsState extends State<Achievements>
bool firstTime = false;
bool doneLoading = false;
int currentWater = 0;
int waterTotal = 0;
var waterNeeded;
String needText = '';
UserData userData = new UserData();
Achievement achievement = new Achievement();
InterstitialAd _interstitial = InterstitialAd(
adUnitId: '', listener: AdListener(), request: AdRequest());
void initState()
super.initState();
_initializeData();
@override
void didChangeDependencies()
super.didChangeDependencies();
final adState = Provider.of<AdState>(context);
adState.initialization.then((status)
setState(()
_interstitial = InterstitialAd(
adUnitId: adState.interstitialAdUnitId,
request: AdRequest(),
listener: adState.adListenerInterstitial,
);
_interstitial.load();
);
);
void _update(int coins)
setState(() => userData.coins = coins);
@override
Widget build(BuildContext context)
if (doneLoading == true)
return Scaffold(
backgroundColor: Colors.blue[200],
appBar: AppBar(
title: Text(
'Achievements',
style: heading,
textAlign: TextAlign.left,
),
centerTitle: true,
leading: FittedBox(
fit: BoxFit.contain,
child: Text(
"Current Streak: $userData.currentStreak",
style: basic,
),
),
leadingWidth: 100,
toolbarOpacity: 1,
toolbarTextStyle: basic,
backgroundColor: Colors.blueGrey[400],
elevation: 0.0,
),
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/bgImg5.png'), fit: BoxFit.cover),
),
child: AchievementList(
update: _update,
),
),
floatingActionButton: FloatingActionButton(
onPressed: ()
//print('coins = $userData.coins');
_interstitial.show();
Navigator.pop(context);
,
child: Icon(Icons.home),
backgroundColor: Colors.grey[850],
),
);
else
return Loading();
resetData()
firstTime = true;
_initializeData() async
await AchievementDataSet().getAchievement(achievement);
await UserDataSet().getUserData(userData);
setState(()
doneLoading = true;
);
adState 文件：
import 'dart:io';
import 'package:google_mobile_ads/google_mobile_ads.dart';
class AdState
Future<InitializationStatus> initialization;
AdState(this.initialization);
String get bannerAdUnitId => Platform.isandroid
? 'ca-app-pub-3940256099942544/6300978111'
: 'ca-app-pub-3940256099942544/6300978111';
String get bannerAd2UnitId => Platform.isAndroid
? 'ca-app-pub-3940256099942544/6300978111'
: 'ca-app-pub-3940256099942544/6300978111';
String get interstitialAdUnitId => Platform.isAndroid
? 'ca-app-pub-3940256099942544/1033173712'
: 'ca-app-pub-3940256099942544/1033173712';
AdListener get adListener => _adListener;
AdListener get adListenerInterstitial => _adListenerInterstitial;
AdListener _adListener = AdListener(
onAdLoaded: (ad) => print('Ad loaded: $ad.adUnitId'),
onAdClosed: (ad) => print('Ad closed: $ad.adUnitId'),
onAdFailedToLoad: (ad, error) =>
print('Ad failed to load: $ad.adUnitId, $error'),
onAdOpened: (ad) => print('Ad opened: $ad.adUnitId'),
onAppEvent: (ad, name, data) =>
print('App event: $ad.adUnitId, $name, $data'),
onApplicationExit: (ad) => print('App Exit: $ad.adUnitId'),
onNativeAdClicked: (nativeAd) =>
print('Native ad clicked: $nativeAd.adUnitId'),
onNativeAdImpression: (nativeAd) =>
print('Native ad impression: $nativeAd.adUnitId'),
onRewardedAdUserEarnedReward: (ad, reward) =>
print('User rewarded: $ad.adUnitId'),
);
AdListener _adListenerInterstitial = AdListener(
onAdLoaded: (ad) => print('Ad loaded: $ad.adUnitId'),
onAdClosed: (ad)
print('Ad closed: $ad.adUnitId');
ad.dispose();
,
onAdFailedToLoad: (ad, error)
print('Ad failed to load: $ad.adUnitId, $error');
ad.dispose();
,
onAdOpened: (ad) => print('Ad opened: $ad.adUnitId'),
onAppEvent: (ad, name, data) =>
print('App event: $ad.adUnitId, $name, $data'),
onApplicationExit: (ad) => print('App Exit: $ad.adUnitId'),
onNativeAdClicked: (nativeAd) =>
print('Native ad clicked: $nativeAd.adUnitId'),
onNativeAdImpression: (nativeAd) =>
print('Native ad impression: $nativeAd.adUnitId'),
onRewardedAdUserEarnedReward: (ad, reward) =>
print('User rewarded: $ad.adUnitId'),
);
忽略 IO 的错误 AdID；我正在使用测试广告，目前仅在 Android 上进行测试。
android/app/src/main/AndroidManifest.xml：
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="klein.kodes.quench">
<application
android:label="Quench"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="@style/NormalTheme"
/>
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:resource="@drawable/launch_background"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
<!-- Sample AdMob app ID: ca-app-pub-3940256099942544~3347511713 -->
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="ca-app-pub-8898143771871274~9426656973"/>
</application>
</manifest>
android/app/build.gradle
def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists())
localPropertiesFile.withReader('UTF-8') reader ->
localProperties.load(reader)
def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null)
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null)
flutterVersionCode = '1'
def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null)
flutterVersionName = '1.0'
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android
compileSdkVersion 30
sourceSets
main.java.srcDirs += 'src/main/kotlin'
defaultConfig
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "klein.kodes.quench"
minSdkVersion 19
targetSdkVersion 30
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
buildTypes
release
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
flutter
source '../..'
dependencies
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.google.android.gms:play-services-ads:20.1.0'
android/build.gradle：
buildscript
ext.kotlin_version = '1.3.50'
repositories
google()
jcenter()
dependencies
classpath 'com.android.tools.build:gradle:4.1.0'
classpath 'com.google.gms:google-services:4.2.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
allprojects
repositories
google()
jcenter()
rootProject.buildDir = '../build'
subprojects
project.buildDir = "$rootProject.buildDir/$project.name"
subprojects
project.evaluationDependsOn(':app')
task clean(type: Delete)
delete rootProject.buildDir
调试日志：
Launching lib\main.dart on SM J600G in debug mode...
Parameter format not correct -
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
√ Built build\app\outputs\flutter-apk\app-debug.apk.
Connecting to VM Service at ws://127.0.0.1:61558/sMmjrllrJ40=/ws
I/in.kodes.quenc(26619): The ClassLoaderContext is a special shared library.
I/chatty (26619): uid=10217(klein.kodes.quench) identical 1 line
I/in.kodes.quenc(26619): The ClassLoaderContext is a special shared library.
I/DynamiteModule(26619): Considering local module com.google.android.gms.ads.dynamite:0 and remote module com.google.android.gms.ads.dynamite:210890500
I/DynamiteModule(26619): Selected remote version of com.google.android.gms.ads.dynamite, version >= 210890500
D/DynamitePackage(26619): Instantiated singleton DynamitePackage.
D/DynamitePackage(26619): Instantiating com.google.android.gms.ads.ChimeraMobileAdsSettingManagerCreatorImpl
D/ConnectivityManager(26619): requestNetwork; CallingUid : 10217, CallingPid : 26619
I/Ads (26619): Updating ad debug logging enablement.
I/WebViewFactory(26619): Loading com.android.chrome version 89.0.4389.105 (code 438910520)
W/in.kodes.quenc(26619): Accessing hidden method Landroid/os/Trace;->isTagEnabled(J)Z (light greylist, reflection)
W/in.kodes.quenc(26619): Accessing hidden method Landroid/os/Trace;->traceBegin(JLjava/lang/String;)V (light greylist, reflection)
W/in.kodes.quenc(26619): Accessing hidden method Landroid/os/Trace;->traceEnd(J)V (light greylist, reflection)
W/in.kodes.quenc(26619): Accessing hidden method Landroid/os/Trace;->asyncTraceBegin(JLjava/lang/String;I)V (light greylist, reflection)
W/in.kodes.quenc(26619): Accessing hidden method Landroid/os/Trace;->asyncTraceEnd(JLjava/lang/String;I)V (light greylist, reflection)
I/cr_LibraryLoader(26619): Loaded native library version number "89.0.4389.105"
I/cr_CachingUmaRecorder(26619): Flushed 4 samples from 4 histograms.
W/in.kodes.quenc(26619): Accessing hidden method Landroid/content/Context;->bindServiceAsUser(Landroid/content/Intent;Landroid/content/ServiceConnection;ILandroid/os/Handler;Landroid/os/UserHandle;)Z (light greylist, reflection)
D/NetworkManagementSocketTagger(26619): tagSocket(127) with statsTag=0x108, statsUid=-1
D/ConnectivityManager(26619): requestNetwork; CallingUid : 10217, CallingPid : 26619
D/NetworkManagementSocketTagger(26619): tagSocket(145) with statsTag=0x108, statsUid=-1
D/ConnectivityManager(26619): requestNetwork; CallingUid : 10217, CallingPid : 26619
D/NetworkManagementSocketTagger(26619): tagSocket(145) with statsTag=0x108, statsUid=-1
W/in.kodes.quenc(26619): Accessing hidden method Landroid/media/AudioManager;->getOutputLatency(I)I (light greylist, reflection)
W/cr_media(26619): Requires BLUETOOTH permission
W/Ads (26619): Update ad debug logging enablement as false
D/NetworkManagementSocketTagger(26619): tagSocket(159) with statsTag=0xffffffff, statsUid=-1
D/NetworkManagementSocketTagger(26619): tagSocket(167) with statsTag=0xffffffff, statsUid=-1
I/flutter (26619): same day
I/flutter (26619): check 4
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
I/ (26619): Increase max job count 40
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 0
D/ViewRootImpl@c380cd1[MainActivity](26619): ViewPostIme pointer 1
I/flutter (26619): Max Streak : 0, 2021-05-06 10:56:32.980484
E/AndroidRuntime(26619): FATAL EXCEPTION: main
E/AndroidRuntime(26619): Process: klein.kodes.quench, PID: 26619
E/AndroidRuntime(26619): java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/ads/InterstitialAd;
E/AndroidRuntime(26619): at io.flutter.plugins.googlemobileads.FlutterInterstitialAd.load(FlutterInterstitialAd.java:70)
E/AndroidRuntime(26619): at io.flutter.plugins.googlemobileads.GoogleMobileAdsPlugin.onMethodCall(GoogleMobileAdsPlugin.java:299)
E/AndroidRuntime(26619): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/AndroidRuntime(26619): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/AndroidRuntime(26619): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:819)
E/AndroidRuntime(26619): at android.os.MessageQueue.nativePollOnce(Native Method)
E/AndroidRuntime(26619): at android.os.MessageQueue.next(MessageQueue.java:326)
E/AndroidRuntime(26619): at android.os.Looper.loop(Looper.java:181)
E/AndroidRuntime(26619): at android.app.ActivityThread.main(ActivityThread.java:7081)
E/AndroidRuntime(26619): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(26619): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
E/AndroidRuntime(26619): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
E/AndroidRuntime(26619): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.ads.InterstitialAd" on path: DexPathList[[zip file "/data/app/klein.kodes.quench-yIS9R3wjPZR-N464Be9ATw==/base.apk"],nativeLibraryDirectories=[/data/app/klein.kodes.quench-yIS9R3wjPZR-N464Be9ATw==/lib/arm, /data/app/klein.kodes.quench-yIS9R3wjPZR-N464Be9ATw==/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]
E/AndroidRuntime(26619): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
E/AndroidRuntime(26619): at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
E/AndroidRuntime(26619): at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
E/AndroidRuntime(26619): ... 12 more
Lost connection to device.
Exited (sigterm)
非常感谢任何和所有帮助。谢谢。
【问题讨论】：
【参考方案1】：我已经解决了。
1.在android/app/build.gradle中添加com.google.android.gms:play-services-ads 依赖 ...
implementation 'com.google.android.gms:play-services-ads:7.5.0'
2.在android/app/build.gradle中添加multidex 依赖 ...
implementation 'com.android.support:multidex:1.0.3'
在defaultConfig中启用multidex 默认配置 ...
multiDexEnabled 真
...
【讨论】：
感谢您的帮助！但是，我已经以不同的方式解决了它。通过在您的应用级别 build.gradle 中使用就我而言，我将所有插件升级到最新版本，插页式广告失败。然后，我将 google_mobile_ads 版本降级到google_mobile_ads: ^0.12.2，然后它有效。
【讨论】：
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