8.4.6. MainActivity’s Layout: activity_main.xml
You’ll provide two layouts for MainActivity—one for phone-sized devices in the res/layout folder and one for tablet-sized devices in the res/layout-large folder. You’ll need to add the layout-large folder.
Phone Layout: activity_main.xml in res/layout
For the phone layout, open activity_main.xml in the res/layout folder. Set the FrameLayout’s Id to @id/fragmentContainer. This FrameLayout will be used on phones to display the app’s Fragments. Set the Padding Left, Padding Right, Padding Top and Padding Bottom properties for the FrameLayout as you did for other layouts in earlier chapters.
Tablet Layout: activity_main.xml in res/layout-large
For the tablet layout, create a new activity_main.xml ...
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