Check whether the device is Tablet or Phone - Android

Solution1: calculate the size of the screen and use that to make the decision whether the device is a phone or tablet?

public boolean isTablet(Context context)

    {

boolean xlarge = ((context.getResources().getConfiguration().screenLayout &       Configuration.SCREENLAYOUT_SIZE_MASK) == 4);

boolean large = ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE);

        return (xlarge || large);

    }

Solution2: calculate the size of the screen diagonal and use that to make the decision whether the device is a phone or tablet?

public boolean isTablet()

       {

              try

              {

                     // Compute screen size

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

                     float screenWidth  = dm.widthPixels / dm.xdpi;

                     float screenHeight = dm.heightPixels / dm.ydpi;

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

                     // Tablet devices should have a screen size greater than 6 inches

                     return size >= 9.0;

              }

              catch(Throwable t)

              {

                     Log.error(TAG_LOG, "Failed to compute screen size", t);

                     return false;

              }

       }

 Solution3: determine the oreintation of the device and use that to make the decision whether the device is a phone or tablet?

   private static boolean isTablet(Display display)

    {

           Log.d(TAG, "isTablet()");

           final int width = display.getWidth();

           final int height = display.getHeight();

           switch (display.getOrientation())

           {

           case 0: case 2:

                  if(width > height) return true;

                  break;

           case 1: case 3:

                  if(width < height) return true;

                  break;

           }

           return false;

    }