java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lifemakers.mapsforge/com.example.lifemakers.mapsforge.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View, int)' on a null object reference

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    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lifemakers.mapsforge/com.example.lifemakers.mapsforge.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View, int)' on a null object reference
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    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View)' on a null object reference
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    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View, android.view.ViewGroup$LayoutParams)' on a null object reference
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    java.lang.RuntimeException: Unable to start activity ComponentInfo{firstappdevelopment.thatdoskilledme/firstappdevelopment.thatdoskilledme.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View)' on a null object reference
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    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View)' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.widget.RelativeLayout.addView(android.view.View, int)' on a null object reference

      at com.example.lifemakers.mapsforge.MainActivity.start_map()
    2. com.example.lifemakers
      MainActivity.onCreate
      1. com.example.lifemakers.mapsforge.MainActivity.start_map(MainActivity.java:57)
      2. com.example.lifemakers.mapsforge.MainActivity.per(MainActivity.java:156)
      3. com.example.lifemakers.mapsforge.MainActivity.onCreate(MainActivity.java:47)
      3 frames
    3. Android Platform
      ActivityThread.main
      1. android.app.Activity.performCreate(Activity.java:6272)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387)
      4. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
      5. android.app.ActivityThread.access$900(ActivityThread.java:157)
      6. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1356)
      7. android.os.Handler.dispatchMessage(Handler.java:102)
      8. android.os.Looper.loop(Looper.java:148)
      9. android.app.ActivityThread.main(ActivityThread.java:5527)
      9 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
      2 frames