using a string resource in a Toast

Change to

 public static void ToastMemoryShort (Context context) {

        Toast.makeText(context, context.getString(R.string.toast_memoryshort), Toast.LENGTH_LONG).show();
        return;
        }

Just use this instead:

makeText(Context context, int resId, int duration) Make a standard toast that just contains a text view with the text from a resource.

From http://developer.android.com/reference/android/widget/Toast.html