Android 在Kotlin中将单例服务转换为对象会使我的应用程序崩溃
我有一个目标,我将发起:Android 在Kotlin中将单例服务转换为对象会使我的应用程序崩溃,android,kotlin,service,initialization,singleton,Android,Kotlin,Service,Initialization,Singleton,我有一个目标,我将发起: public class SIPManager extends Service implements OnPortSIPEvent { private static SIPManager instance; public static SIPManager getInstance() { return instance; } } 我会从我的应用程序开始我会这样做: if (SIPManager.getInstance
public class SIPManager
extends Service
implements OnPortSIPEvent
{
private static SIPManager instance;
public static SIPManager getInstance()
{
return instance;
}
}
我会从我的应用程序开始我会这样做:
if (SIPManager.getInstance() != null && callStrategy != null && callStrategy == CallStrategy.SIP) {
if (SIPManager.getInstance().isSipRegistered && (SIPManager.getInstance().isLoginInProgress || SIPManager.getInstance()
.inActiveCall()!! || SIPManager.getInstance().isRegistrationRefreshValid!!)) {
..... do stuff
}
}
但在转换成Kotlin后,我得到:
2019-07-17 14:39:51.517 21173-21173/com.xelion.android.debug E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.xelion.android.debug, PID: 21173
java.lang.ExceptionInInitializerError
at com.xelion.android.App$Companion.initServices(App.kt:103)
at com.xelion.android.App.onCreate(App.kt:41)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1154)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5920)
at android.app.ActivityThread.access$1100(ActivityThread.java:200)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6718)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference
at android.content.ContextWrapper.getSystemService(ContextWrapper.java:728)
at com.xelion.android.sip.SIPManager.onCreate(SIPManager.kt:316)
at com.xelion.android.sip.SIPManager.<clinit>(SIPManager.kt:126)
at com.xelion.android.App$Companion.initServices(App.kt:103)
at com.xelion.android.App.onCreate(App.kt:41)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1154)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5920)
at android.app.ActivityThread.access$1100(ActivityThread.java:200)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6718)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-07-17 14:39:55.561 21173-21173/com.xelion.android.debug
E/CrashlyticsCore: Failed to execute task.
java.util.concurrent.TimeoutException
at java.util.concurrent.FutureTask.get(FutureTask.java:206)
at com.crashlytics.android.core.CrashlyticsBackgroundWorker.submitAndWait(CrashlyticsBackgroundWorker.java:41)
at com.crashlytics.android.core.CrashlyticsController.handleUncaughtException(CrashlyticsController.java:321)
at com.crashlytics.android.core.CrashlyticsController$6.onUncaughtException(CrashlyticsController.java:301)
at com.crashlytics.android.core.CrashlyticsUncaughtExceptionHandler.uncaughtException(CrashlyticsUncaughtExceptionHandler.java:42)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1068)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1063)
at java.lang.Thread.dispatchUncaughtException(Thread.java:1955)
我没有名字。我应该为我的单身汉创作吗
我第一件事就是尝试从App.kt类中调用。但仍然只是崩溃
我的单身汉现在看起来像这样
您不能将Android
服务设置为Kotlin对象。Kotlin无法创建服务
实例;只有Android框架可以
在SIPManager
中将对象更改为class
。然后,还原Java代码中必须具有的startService()
调用,在您需要之前的某个时间启动SIPManager
。我们无法帮助您使用未出现在您的问题中的Kotlin代码。看起来像是您的SIPManager中的上下文。onCreate
未在my App.kt onCreate调用SIPManager.onCreate()中初始化。这就是它崩溃的地方。我需要在init{}中添加一些东西吗?在我看来,单例代码看起来比kotlin更像java,我现在正在添加翻译。只要一秒钟谢谢。那我就把它作为一门课,找个同伴
object SIPManager : Service(), OnPortSIPEvent {
override fun onCreate() {
super.onCreate()
portSipSdk = PortSipSdk()
incomingCallToneGenerator = IncomingCallToneGenerator()
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val channel = NotificationChannel(channelID, "Xelion", NotificationManager.IMPORTANCE_DEFAULT)
channel.enableLights(true)
notificationManager.createNotificationChannel(channel)
}
showServiceNotifiCation()
subscribeToCallsNotifications()
}
}