How to detect a tablet device in Android?

Question

I am trying to port my application developed for smartphones to the tablets with minor modifications. Is there an API in Android to detect if the device is tablet?

Answer 1

Thinking on the "new" acepted directories (values-sw600dp for example) i created this method based on the screen' width DP:

/**
 * Returns true if the current device is a smartphone or a "tabletphone"
 * like Samsung Galaxy Note or false if not.
 * A Smartphone is "a device with less than TABLET_MIN_DP_WEIGHT" dpi
 * 
 * @return true if the current device is a smartphone or false in other 
 * case
 */
protected static boolean isSmartphone(Activity act){
    DisplayMetrics metrics = new DisplayMetrics();
    act.getWindowManager().getDefaultDisplay().getMetrics(metrics);

    int dpi = 0;
    if (metrics.widthPixels < metrics.heightPixels){
        dpi = (int) (metrics.widthPixels / metrics.density);
    }
    else{
        dpi = (int) (metrics.heightPixels / metrics.density);
    }

    if (dpi < TABLET_MIN_DP_WEIGHT)         return true;
    else                                    return false;
}



 public static final int TABLET_MIN_DP_WEIGHT = 450;  

And on this list you can find some of the DP of popular devices and tablet sizes:

Wdp / Hdp

GALAXY Nexus: 360 / 567
XOOM: 1280 / 752
GALAXY NOTE: 400 / 615
NEXUS 7: 961 / 528
GALAXY TAB (>7 && <10): 1280 / 752
GALAXY S3: 360 / 615

Wdp = Width dp
Hdp = Height dp