我將我的Launcher Activity從Java轉換爲Kotlin,並且在onCreate()中發生崩潰,我不明白它爲什麼會崩潰。onCreate從Java轉換到Kotlin後崩潰
的Java:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
科特林:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
調用堆棧:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.a.b.c/com.a.b.c.Authentication.AuthenticationActivity}: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter savedInstanceState
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter savedInstanceState
at com.a.b.c.Activity.AppLifecycleTracker.onActivityCreated(AppLifecycleTracker.kt)
at android.app.Application.dispatchActivityCreated(Application.java:195)
at android.app.Activity.onCreate(Activity.java:922)
at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:277)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:85)
at com.a.b.c.Authentication.AuthenticationActivity.onCreate(AuthenticationActivity.kt:147)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
你的onCreate()還有什麼嗎? – creativecreatorormaybenot
活動的名稱是什麼? – Bob
AuthenticationActivity.kt和清單文件有這個條目:<活動 機器人:名字= 「Authentication.AuthenticationActivity。」 機器人:configChanges = 「keyboardHidden |方向|屏幕尺寸| uiMode」 機器人:screenOrientation = 「sensorPortrait」 機器人: theme =「@ style/AppTheme.Simple」 tools:ignore =「InnerclassSeparator」> –
Harish