一些網絡判斷方法

public class NetworkUtils {

    /**
     * @Title: checkingNetStatus
     * @Description: 判斷網絡狀態
     * @param: @param context
     * @param: @return
     * @return: boolean false:網絡異常；true 網絡正常
     */
    public static boolean checkingNetStatus(Context context) {
        boolean result = false;
        ConnectivityManager conManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networInfo = conManager.getActiveNetworkInfo(); // 取得網絡連接相關信息
        if (networInfo == null || !networInfo.isAvailable()) // 網絡鏈接異常
        {
            result = false;
        } else {
            result = true;
        }
        return result;
    }

    /**
     * 打開網絡設置
     */
    public static void openNetSet(Context context) {
        if (android.os.Build.VERSION.SDK_INT > 10) {
            // 3.0以上打開設置界面，也可以直接用ACTION_WIRELESS_SETTINGS打開到wifi界面
            context.startActivity(new Intent(
                    android.provider.Settings.ACTION_SETTINGS));
        } else {
            context.startActivity(new Intent(
                    android.provider.Settings.ACTION_WIRELESS_SETTINGS));
        }
    }

    /**
     * 檢測手機是否開啓GPRS網絡,需要調用ConnectivityManager,TelephonyManager 服務.
     * 
     * @param context
     * @return boolean
     */
    public static boolean checkGprsNetwork(Context context) {
        boolean has = false;
        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        TelephonyManager mTelephony = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        NetworkInfo info = connectivity.getActiveNetworkInfo();
        int netType = info.getType();
        int netSubtype = info.getSubtype();
        if (netType == ConnectivityManager.TYPE_MOBILE
                && netSubtype == TelephonyManager.NETWORK_TYPE_UMTS
                && !mTelephony.isNetworkRoaming()) {
            has = info.isConnected();
        }
        return has;

    }
    public static int checkNetType(Context context){
        int type=0;
        //0--網絡未連接
        //1-wifi
        //2-流量
        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo.State gprs = connectivity.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
        NetworkInfo.State wifi = connectivity.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
        if(gprs == NetworkInfo.State.CONNECTED || gprs == NetworkInfo.State.CONNECTING){
                type=2;
        }
        //判斷爲wifi狀態下才加載廣告，如果是GPRS手機網絡則不加載！
        else if(wifi == NetworkInfo.State.CONNECTED || wifi == NetworkInfo.State.CONNECTING){
                type=1;
        }else {
            type=0;
        }
        return type;
    }


    /**
     * 檢測手機是否開啓WIFI網絡,需要調用ConnectivityManager服務.
     *
     * @param context
     * @return boolean
     */
    public static boolean checkWifiNetwork(Context context) {
        boolean has = false;
        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = connectivity.getActiveNetworkInfo();
        int netType = info.getType();
        int netSubtype = info.getSubtype();
        if (netType == ConnectivityManager.TYPE_WIFI) {
            has = info.isConnected();
        }
        return has;
    }

    /**
     * 檢測當前手機是否聯網
     *
     * @param context
     * @return boolean
     */
    public static boolean isNetworkAvailable(Context context) {
        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity == null) {
            return false;
        } 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;
    }

    /**
     * 手機是否處在漫遊
     *
     * @param mCm
     * @return boolean
     */
    public boolean isNetworkRoaming(Context mCm) {
        ConnectivityManager connectivity = (ConnectivityManager) mCm
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity == null) {
            return false;
        }
        NetworkInfo info = connectivity.getActiveNetworkInfo();
        boolean isMobile = (info != null && info.getType() == ConnectivityManager.TYPE_MOBILE);
        TelephonyManager mTm = (TelephonyManager) mCm
                .getSystemService(Context.TELEPHONY_SERVICE);
        boolean isRoaming = isMobile && mTm.isNetworkRoaming();
        return isRoaming;
    }


    public static String getImeiId(Context context) {
        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        String imei = telephonyManager.getDeviceId();
        return imei;
    }
}