Look for the "caused by" line after the NullPointerException. That should give you the file and line number where you are getting the exception...
Thanks, Justin Anderson MagouyaWare Developer http://sites.google.com/site/magouyaware On Fri, May 6, 2011 at 9:17 PM, Tom <[email protected]> wrote: > The error I find in my logcat when the Activity launches is: > E/AndroidRuntime( 296): java.lang.RuntimeException: Unable to start > activity Co mponentInfo{com.soft.tobi/com.soft.tobi.Game_main}: > java.lang.NullPointerExc eption > > But I don't see why I would get a NullPointerExc eption because the > image ids are in my xml file > > On May 6, 3:46 pm, Justin Anderson <[email protected]> wrote: > > Look at the LogCat output... That will tell you the cause of the > problem. > > > > Thanks, > > Justin Anderson > > MagouyaWare Developerhttp://sites.google.com/site/magouyaware > > > > On Thu, May 5, 2011 at 8:51 PM, Tom <[email protected]> wrote: > > > I am trying to set the size and position of an image (image2) on the > > > screen so that it is in the same position and size relative to the > > > background image (image1) it is on no matter the screen size. To do > > > this, I try to alter the layout parameters of image2 in my `onCreate` > > > method of my `Activity` class: > > > > > RelativeLayout rl = (RelativeLayout) > > > findViewById(R.id.rlGen); > > > RelativeLayout.LayoutParams params = new > > > RelativeLayout.LayoutParams( > > > (image1.getWidth()) / 4, > > > (image1.getHeight()) / 4); > > > params.leftMargin = (image1.getWidth()) / 2; > > > params.topMargin = (image1.getHeight()) / 2; > > > rl.addView(image2, params); > > > > > But when my app goes to this activity, I get an error that says the > > > application has stopped unexpectedly. Then I have to force close the > > > app. Why would this happen? Is there something I am missing? or is > > > there a better way to do this? > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Android Developers" group. > > > To post to this group, send email to > [email protected] > > > To unsubscribe from this group, send email to > > > [email protected] > > > For more options, visit this group at > > >http://groups.google.com/group/android-developers?hl=en > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
