Tab activityhttp://www.learn2crack.com/2013/12/android-swipe-view-tab-layout-example.htmlhttp://androidexample.com/Tab_Layout_%7C_TabBar_-_Android_Example/index.php?view=article_discription&aid=103&aaid=125Custom Mapshttps://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CBwQFjAA&url=http%3A%2F%2Fstackoverflow.com%2Fquestions%2F19798797%2Fhow-to-display-a-custom-map-on-android&ei=I3keVInWIIi1uATWmoC4BQ&usg=AFQjCNFKvFQjEi67Ism3e2vfiugko9rIYg&sig2=5jwYS1vNXkDKFmjqG9smJQ&bvm=bv.75775273,d.c2Ehttps://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0CD8QFjAE&url=http%3A%2F%2Fhelp.openstreetmap.org%2Fquestions%2F13749%2Fhow-to-render-a-custom-map-in-android-project&ei=I3keVInWIIi1uATWmoC4BQ&usg=AFQjCNH7f47KzatkOfxmfgQlmGgNgCfV9A&sig2=DvIjEC2QovFep8AaXNpWjQ&bvm=bv.75775273,d.c2Ehttps://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0CEgQFjAF&url=http%3A%2F%2Fandroid.stackexchange.com%2Fquestions%2F60185%2Fhow-to-view-custom-google-map-on-my-android-device&ei=I3keVInWIIi1uATWmoC4BQ&usg=AFQjCNFVm5VLhpH4DiuK-mARrNp1_drKQg&sig2=qBsY4sECoaEgdmjtdICzzA&bvm=bv.75775273,d.c2EGrid Layouthttp://developer.android.com/reference/android/widget/GridLayout.htmlhttp://developer.android.com/guide/topics/ui/layout/gridview.html