java.lang.RuntimeException

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  • Android implement Google maps with fragment
    via Stack Overflow by nightslit
    ,
    • java.lang.RuntimeException: Unable to start activity ComponentInfo{com.zuercher.zuerchertechnik/com.zuercher.zuerchertechnik.Display_contact}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.MapFragment.getMapAsync(com.google.android.gms.maps.OnMapReadyCallback)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2656) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2721) at android.app.ActivityThread.access$900(ActivityThread.java:168) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5753) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.MapFragment.getMapAsync(com.google.android.gms.maps.OnMapReadyCallback)' on a null object reference at com.zuercher.zuerchertechnik.Display_contact.onCreate(Display_contact.java:41) at android.app.Activity.performCreate(Activity.java:6112) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1117) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2609)
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