Android警报管理器崩溃-运行时异常，线程/异步问题
Android警报管理器崩溃-运行时异常，线程/异步问题
提问于 2019-07-13 22:52:01
打电话时：
await AndroidAlarmManager.oneShot(Duration(seconds: 1), 17, callback)在我的timer类中，具有回调函数，类似于：
static void alarmCallback(){
print('>>>>>>>>>>>>>>>>>>>> ALARM CALLBACK <<<<<<<<<<<<<<<<< ');
}我有错误：
E/AndroidRuntime( 9115): FATAL EXCEPTION: AsyncTask #2
E/AndroidRuntime( 9115): Process: com.myapp, PID: 9115
E/AndroidRuntime( 9115): java.lang.RuntimeException: An error occurred while executing doInBackground()
E/AndroidRuntime( 9115): at android.os.AsyncTask$3.done(AsyncTask.java:354)
E/AndroidRuntime( 9115): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
E/AndroidRuntime( 9115): at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
E/AndroidRuntime( 9115): at java.util.concurrent.FutureTask.run(FutureTask.java:271)
E/AndroidRuntime( 9115): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
E/AndroidRuntime( 9115): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
E/AndroidRuntime( 9115): at java.lang.Thread.run(Thread.java:764)
E/AndroidRuntime( 9115): Caused by: java.lang.RuntimeException: Methods marked with @UiThread must be executed on the main thread. Current thread: AsyncTask #2
E/AndroidRuntime( 9115): at io.flutter.embedding.engine.FlutterJNI.ensureRunningOnMainThread(FlutterJNI.java:794)
E/AndroidRuntime( 9115): at io.flutter.embedding.engine.FlutterJNI.dispatchPlatformMessage(FlutterJNI.java:684)
E/AndroidRuntime( 9115): at io.flutter.embedding.engine.dart.DartMessenger.send(DartMessenger.java:80)
E/AndroidRuntime( 9115): at io.flutter.embedding.engine.dart.DartExecutor.send(DartExecutor.java:189)
E/AndroidRuntime( 9115): at io.flutter.view.FlutterNativeView.send(FlutterNativeView.java:155)
E/AndroidRuntime( 9115): at io.flutter.plugin.common.MethodChannel.invokeMethod(MethodChannel.java:98)
E/AndroidRuntime( 9115): at io.flutter.plugin.common.MethodChannel.invokeMethod(MethodChannel.java:84)
E/AndroidRuntime( 9115): at io.flutter.plugins.androidalarmmanager.AlarmService.invokeCallbackDispatcher(AlarmService.java:170)
E/AndroidRuntime( 9115): at io.flutter.plugins.androidalarmmanager.AlarmService.onHandleWork(AlarmService.java:151)
E/AndroidRuntime( 9115): at androidx.core.app.JobIntentService$CommandProcessor.doInBackground(JobIntentService.java:392)
E/AndroidRuntime( 9115): at androidx.core.app.JobIntentService$CommandProcessor.doInBackground(JobIntentService.java:383)
E/AndroidRuntime( 9115): at android.os.AsyncTask$2.call(AsyncTask.java:333)
E/AndroidRuntime( 9115): at java.util.concurrent.FutureTask.run(FutureTask.java:266)
E/AndroidRuntime( 9115): ... 3 more
D/ViewRootImpl@c3ee092[MainActivity]( 9115): MSG_WINDOW_FOCUS_CHANGED 0 1
D/InputMethodManager( 9115): prepareNavigationBarInfo() DecorView@360043a[MainActivity]
D/InputMethodManager( 9115): getNavigationBarColor() -855310
I/Process ( 9115): Sending signal. PID: 9115 SIG: 9
Lost connection to device.我实现了android_alarm_manager，就像在经理的正式文档中一样
- 添加了显示的权限、服务和接收
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.WAKE_LOCK" /> <service
android:name="io.flutter.plugins.androidalarmmanager.AlarmService"
android:permission="android.permission.BIND_JOB_SERVICE"
android:exported="false"/>
<receiver
android:name="io.flutter.plugins.androidalarmmanager.AlarmBroadcastReceiver"
android:exported="false"/>
<receiver
android:name="io.flutter.plugins.androidalarmmanager.RebootBroadcastReceiver"
android:enabled="false">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"></action>
</intent-filter>
</receiver>- 在应用程序午餐时调用AndroidAlarmManager.initialize()；
- 使用新类完成的PluginRegistrant (在清单中与应用程序名称相同)
<application
android:name=".Application"public class Application extends FlutterApplication implements PluginRegistrantCallback {
@Override
public void onCreate() {
super.onCreate();
AlarmService.setPluginRegistrant(this);
}
@Override
public void registerWith(PluginRegistry registry) {
GeneratedPluginRegistrant.registerWith(registry);
}
}警报已经初始化--在调用oneShot()之前：
I/AlarmService( 9115): Starting AlarmService...
I/AlarmService( 9115): AlarmService started!我已经在寻找这个错误，例如：
或者在这里：
回答 1
Stack Overflow用户
发布于 2022-06-17 10:50:02
如果在await AndroidAlarmManager.initialize();之前调用runApp()，并且引发运行时错误，则在初始化之前添加WidgetsFlutterBinding.ensureInitialized();。
main() async {
WidgetsFlutterBinding.ensureInitialized();
await AndroidAlarmManager.initialize();
runApp(...);
}另外，使用加号而不是android_alarm_manager，因为它已经被废弃了。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/57023369
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