Android判斷SDK版本及判斷是否連網

 public static int getSDKVersionNumber() {

int sdkVersion;try {sdkVersion = Integer.valueOf(android.os.Build.VERSION.SDK);} catch (NumberFormatException e) {sdkVersion = 0;}return sdkVersion;}

public static boolean hasInternet(Activity activity) {ConnectivityManager manager = (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo info = manager.getActiveNetworkInfo();if (info == null || !info.isConnected()) {return false;}if (info.isRoaming()) {return true;}return true;}