Android findviewbyid finding view by id when view is not on the same layout invoked by setContentView

Question

I have an activity MyActivity that extends from MapActivity  In the  xml file containing the layout I can only include the MapView   lt com google android maps MapView     xmlns android  http   schemas android com apk res android      android id    id trail map view      android layout width  fill parent      android layout height  fill parent      android clickable  true      android apiKey  key    gt    However I do need to find another view that is located in another  xml file  Unfortunately  findViewById returns null  How can I get the view I am looking for   Thanks a lot

User · Accepted Answer

Thanks for commenting  I understand what you mean but I didn t want to check old values  I just wanted to get a pointer to that view   Looking at someone else s code I have just found a workaround  you can access the root of a layout using LayoutInflater   The code is the following  where this is an Activity   final LayoutInflater factory   getLayoutInflater     final View textEntryView   factory inflate R layout landmark new dialog  null    landmarkEditNameView    EditText  textEntryView findViewById R id landmark name dialog edit     You need to get the inflater for this context  access the root view through the inflate method and finally call findViewById on the root view of the layout   Hope this is useful for someone  Bye

User · Answer

try   Activity parentActivity   this getParent    if  parentActivity    null        View landmarkEditNameView    EditText  parentActivity findViewById R id  landmark name dialog edit

User · Answer

It s impossible  You can only find and access views that are currently running  If you want to check the value of ex  TextView used in previus activity you must save the value is SharedPreferences  database  file or pass by Intent

User · Answer

Another way to do this is      inflate the layout View myLayout   LayoutInflater from this  inflate R layout MY LAYOUT null       load the text view TextView myView    TextView  myLayout findViewById R id MY VIEW

User · Answer

I used View inflate getContext    R layout whatever  null   The using of View inflate prevents the warning of using null at getLayoutInflater   inflate

User · Answer

I have changed in my activity but effected  Here is my code   View layout   getLayoutInflater   inflate R layout list group null           try               LinearLayout linearLayout    LinearLayout  layout findViewById R id ldrawernav               linearLayout setBackgroundColor Color parseColor   ffffff                       catch  Exception e

[android] Android: findviewbyid: finding view by id when view is not on the same layout invoked by setContentView

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