Simple class to determinate if your device is tablet or phone from your size. If size > 5 is tablet

gistfile1.java

import android.content.Context;
import android.util.DisplayMetrics;

public class isTablet {
	double size_device;
	public double tabletSize(Context context) {
	     double size = 0;
	        try {

	            // Compute screen size

	            DisplayMetrics dm = context.getResources().getDisplayMetrics();

	            float screenWidth  = dm.widthPixels / dm.xdpi;

	            float screenHeight = dm.heightPixels / dm.ydpi;

	            size = Math.sqrt(Math.pow(screenWidth, 2) +

	                                 Math.pow(screenHeight, 2));

	        } catch(Throwable t) {
	        	System.out.println("Please verify divece: "+ t.getMessage());
	        }
	        return size;
	    }
	public boolean defineDevice(Context context){
		size_device = tabletSize(context);
		if(size_device >= 5){
			//Define if are tablet
			return true;
		}
		return false;
	}
}