Android判断是否有网络连接

工具类

public class CommonUtil {

    /**
     * 检查是否有网络
     */
    public static boolean isNetworkAvailable(Context context) {

        NetworkInfo info = getNetworkInfo(context);
        return info != null && info.isAvailable();
    }


    /**
     * 检查是否是WIFI
     */
    public static boolean isWifi(Context context) {

        NetworkInfo info = getNetworkInfo(context);
        if (info != null) {
            if (info.getType() == ConnectivityManager.TYPE_WIFI) {
                return true;
            }
        }
        return false;
    }


    /**
     * 检查是否是移动网络
     */
    public static boolean isMobile(Context context) {

        NetworkInfo info = getNetworkInfo(context);
        if (info != null) {
            if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
                return true;
            }
        }
        return false;
    }


    private static NetworkInfo getNetworkInfo(Context context) {

        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(
                Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo();
    }

    }