Android GridView full screen -

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I have GridView and I have to customize the BaseAdapter Use text in my GridView I have a problem, when I run my app, my 'Gridview' left, right, top and bottom margins. I do not need these margins.

This is my xml source: 

  & lt; GridView xmlns: android = "http: // schemas.android.com/apk/res/android" android: id = "@ + id / strada_grid_view" Android: layout_width = "match_parent" Android: layout_height = "match_parent" Android: Background = "# D6d6d6" Android: Gravity = "Center" Android: Horizontal Location = "1 DP" Android: numColumns = "2" Android: verticalSpacing = "1dp" & gt; & Lt; / GridView & gt;   
  GridView  adapter  XML  code:  
   & Lt; TextView android: id = "@ + id / stradaID" Android: Layout_width = "Wrap_content" Android: Layout_height = "Wrap_content" Android: layout_alignLeft = "@ + id / desc1" Android: layout_alignParentBottom = "true" android: text = "Tekstwu "Android: text collar =" # 000000 "Android: visibility =" gone "/> & Lt; imageView android: id = "@ + id / photo1" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: layout_alignParentTop = "true" Android: layout_centerHorizontal = "true" Android: layout_marginTop = "38dp" / & gt ; & Lt; / RelativeLayout & gt; & Lt; / RelativeLayout & gt;   
 How can I solve my problem?  
  
 
 
 I have set the project location  /res/values/dimens.xml  Default margin 0 and this works for me  
 & lt; Resources & gt;  
  & lt; Dimen name = "activity_horizontal_margin" & gt; 0dp & lt; / Dimen & gt; & Lt; Dimen name = "activity_vertical_margin" & gt; 0dp & lt; / Dimen & gt;   
 & lt; / Resources & gt;

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