static boolean isAndroidRuntime() {
        if (isAndroid == -1) {
            final String runtime = System.getProperty("java.runtime.name");
            isAndroid = (runtime != null && runtime.equals("Android Runtime")) ? 1 : 0;
        }
        return isAndroid == 1;
    }
@Test
    public void testIsNotAndroidRuntime() {
        assertFalse(isAndroidRuntime());
    }