判断网络连接状态工具类

public class NetWorkUtils {

/**
 * 判断是否有网络连接
 * @param context
 * @return boolean
 */
public static boolean isNetworkConnected(Context context) {
    if (context != null) {
        ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
        if (mNetworkInfo != null) {
            return mNetworkInfo.isAvailable();
        }
    }
    return false;
}

/**
 * 判断WIFI网络是否可用
 * @param context
 * @return
 */
public static boolean isWifiConnected(Context context) {
    if (context != null) {
        ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mWiFiNetworkInfo = mConnectivityManager
                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (mWiFiNetworkInfo != null) {
            return mWiFiNetworkInfo.isAvailable();
        }
    }
    return false;
}

/**
 * 判断MOBILE网络是否可用
 * @param context
 * @return
 */
public static boolean isMobileConnected(Context context) {
    if (context != null) {
        ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mMobileNetworkInfo = mConnectivityManager
                .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        if (mMobileNetworkInfo != null) {
            return mMobileNetworkInfo.isAvailable();
        }
    }
    return false;
}

/**
 * 获取当前网络连接的类型信息
 * @param context
 * @return
 */
public static int getConnectedType(Context context) {
    if (context != null) {
        ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
        if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {
            return mNetworkInfo.getType();
        }
    }
    return -1;
}

/**
 * 获取当前的网络状态 ：没有网络0：WIFI网络1：3G网络2：2G网络3
 *
 * @param context
 * @return
 */
public static int getAPNType(Context context) {
    int netType = 0;
    ConnectivityManager connMgr = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
    if (networkInfo == null) {
        return netType;
    }
    int nType = networkInfo.getType();
    if (nType == ConnectivityManager.TYPE_WIFI) {
        netType = 1;// wifi
    } else if (nType == ConnectivityManager.TYPE_MOBILE) {
        int nSubType = networkInfo.getSubtype();
        TelephonyManager mTelephony = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        if (nSubType == TelephonyManager.NETWORK_TYPE_UMTS
                && !mTelephony.isNetworkRoaming()) {
            netType = 2;// 3G
        } else {
            netType = 3;// 2G
        }
    }
    return netType;
}

}

（编辑：李大同）

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