Tablet or Phone – Android

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As it has been mentioned before, you do not want to check whether the device is a tablet or a phone but you want to know about the features of the device,

Most of the time, the difference between a tablet and a phone is the screen size which is why you want to use different layout files. These files are stored in the res/layout-<qualifiers> directories. You can create an XML file in the directoy res/values-<same qualifiers> for each of your layouts and put an int/bool/string resource into it to distinguish between the layouts you use.

Example:

File res/values/screen.xml (assuming res/layout/ contains your layout files for handsets)

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="screen_type">phone</string>
</resources>

File res/values-sw600dp/screen.xml (assuming res/layout-sw600dp/ contains your layout files for small tablets like the Nexus 7) 

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="screen_type">7-inch-tablet</string>
</resources>

File res/values-sw720dp/screen.xml (assuming res/layout-sw720dp/ contains your layout files for large tablets like the Nexus 10): 

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="screen_type">10-inch-tablet</string>
</resources>

Now the screen type is accessible via the R.string.screen_type constant.

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