How to tell whether an android device has hard keys

Question

How can I tell whether an android device has physical keys or the software navigation bar? I need to change the layout dependant on whether the software navigation is drawn

Answer 1

Here you go.. this should do what you want.

@SuppressLint("NewApi")
private static boolean hasSoftNavigation(Context context)
{
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH){
        return !ViewConfiguration.get(context).hasPermanentMenuKey();
    }
    return false;
}

Answer 2

private boolean isHardwareKeyboardAvailable() { return getResources().getConfiguration().keyboard != Configuration.KEYBOARD_NOKEYS; }

In addition, here is more info. http://developer.android.com/reference/android/content/res/Configuration.html#keyboard

EDIT - To check for physical keyboard

private boolean isPhysicalKeyboardAvailable() { return getResources().getConfiguration().keyboard == Configuration.KEYBOARD_QWERTY; }

For more information on the different Configurations view http://developer.android.com/reference/android/content/res/Configuration.html#keyboard

I am sure one of those works.

2nd EDIT -

Check. Already asked.

Android: Programmatically detect if device has hardware menu button

Answer 3

Solved by doing this the first time the app is launched and saving to preferences:

public static boolean hasSoftKeys(WindowManager windowManager){
    boolean hasSoftwareKeys = true;
    //c = context; use getContext(); in fragments, and in activities you can 
    //directly access the windowManager();

    if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.JELLY_BEAN_MR1){
        Display d = c.getWindowManager().getDefaultDisplay();

        DisplayMetrics realDisplayMetrics = new DisplayMetrics();
        d.getRealMetrics(realDisplayMetrics);

        int realHeight = realDisplayMetrics.heightPixels;
        int realWidth = realDisplayMetrics.widthPixels;

        DisplayMetrics displayMetrics = new DisplayMetrics();
        d.getMetrics(displayMetrics);

        int displayHeight = displayMetrics.heightPixels;
        int displayWidth = displayMetrics.widthPixels;

        hasSoftwareKeys =  (realWidth - displayWidth) > 0 ||
                           (realHeight - displayHeight) > 0;
    } else {
        boolean hasMenuKey = ViewConfiguration.get(c).hasPermanentMenuKey();
        boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
        hasSoftwareKeys = !hasMenuKey && !hasBackKey;
    }
    return hasSoftwareKeys;
}