android 获取网络状态的工具类

使用：

// 获取网络是否可用
KapNetWorkStatusManager.isNetworkAvailable();

工具类如下:

/**
 * Created by jing on 2018/1/29.
 * 网络状态
 */

public class KapNetWorkStatusManager {
    private static Context getContext(){
        return KapApplication.getContext();
    }
    /**
     * 网络是否可用
     *
     */
    public static boolean isNetworkAvailable() {
        Context context = getContext();
        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity == null) {
        } else {
            NetworkInfo[] info = connectivity.getAllNetworkInfo();
            if (info != null) {
                for (int i = 0; i < info.length; i++) {
                    if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                        return true;
                    }
                }
            }
        }
        return false;
    }


    /**
     * wifi是否打开
     */
    public static boolean isWifiEnabled() {
        Context context = getContext();
        ConnectivityManager mgrConn = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        TelephonyManager mgrTel = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
                .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
                .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
    }

    /**
     * 判断当前网络是否是wifi网络
     * if(activeNetInfo.getType()==ConnectivityManager.TYPE_MOBILE) {
     *
     * @return boolean
     */
    public static boolean isWifi() {
        Context context = getContext();
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo != null
                && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {
            return true;
        }
        return false;
    }

    /**
     * 判断当前网络是否3G网络
     *
     */
    public static boolean is3G() {
        Context context = getContext();
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo != null
                && activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
            return true;
        }
        return false;
    }
}