java.lang.RuntimeException

Unable to start activity ComponentInfo{com.example.dennis.afbstellplatzbuchung/com.example.dennis.afbstellplatzbuchung.Settings}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

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Solutions on the web45833

  • via Stack Overflow by Dennis Bölling
    , 10 months ago
    Unable to start activity ComponentInfo{com.example.dennis.afbstellplatzbuchung/com.example.dennis.afbstellplatzbuchung.Settings}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
  • via Stack Overflow by carlos1990
    , 1 year ago
    Unable to start activity ComponentInfo{com.cm.georganizer/com.cm.georganizer.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
  • Unable to start activity ComponentInfo{be.ehb.dt.bestellingen/be.ehb.dt.bestellingen.Winkel}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
  • Stack trace

    • java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.dennis.afbstellplatzbuchung/com.example.dennis.afbstellplatzbuchung.Settings}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3254) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3350) at android.app.ActivityThread.access$1100(ActivityThread.java:222) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1795) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7229) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at com.example.dennis.afbstellplatzbuchung.Settings.backToMain(Settings.java:134) at com.example.dennis.afbstellplatzbuchung.Settings.onCreate(Settings.java:41) at android.app.Activity.performCreate(Activity.java:6876) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1135) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3207)

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