private static String getSystemProperty(String name) throws Exception {
  Class systemPropertyClazz = Class.forName("android.os.SystemProperties");
  return (String) systemPropertyClazz.getMethod("get", new Class[]{String.class})
      .invoke(systemPropertyClazz, new Object[]{name});
}

public static boolean checkEmulator() {
  try {
    boolean goldfish = getSystemProperty("ro.hardware").contains("goldfish");
    boolean emu = getSystemProperty("ro.kernel.qemu").length() > 0;
    boolean sdk = getSystemProperty("ro.product.model").equals("sdk");
    if (emu || goldfish || sdk) {
      return true;
    }
  } catch (Exception e) {
  }
  return false;
}