Android 一些系统参数的获取

//获取网络类型 2G/3G/WIFI
    public String getNetworkType(){
        String mNetWorkType = "";
        ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();

        if (networkInfo != null && networkInfo.isConnected()) {
            String type = networkInfo.getTypeName();

            if (type.equalsIgnoreCase("WIFI")) { //WIFI网络
                mNetWorkType = "WIFI";
            } else if (type.equalsIgnoreCase("MOBILE")) {
                String proxyHost = android.net.Proxy.getDefaultHost();

                if (TextUtils.isEmpty(proxyHost) == true){
                    if (isFastMobileNetwork(this) == true){ //3G网络
                        mNetWorkType =  "3G";
                    }else{ //2G网络
                        mNetWorkType = "2G";
                    }
                }else{ //wap网络
                    mNetWorkType = "wap";
                }

            }
        } else { //无网络
            mNetWorkType = "";
        }

        return mNetWorkType;
    }

    public boolean isFastMobileNetwork(Context context) {
        TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
        switch (telephonyManager.getNetworkType()) {
            case TelephonyManager.NETWORK_TYPE_1xRTT:
                return false; // ~ 50-100 kbps
            case TelephonyManager.NETWORK_TYPE_CDMA:
                return false; // ~ 14-64 kbps
            case TelephonyManager.NETWORK_TYPE_EDGE:
                return false; // ~ 50-100 kbps
            case TelephonyManager.NETWORK_TYPE_EVDO_0:
                return true; // ~ 400-1000 kbps
            case TelephonyManager.NETWORK_TYPE_EVDO_A:
                return true; // ~ 600-1400 kbps
            case TelephonyManager.NETWORK_TYPE_GPRS:
                return false; // ~ 100 kbps
            case TelephonyManager.NETWORK_TYPE_HSDPA:
                return true; // ~ 2-14 Mbps
            case TelephonyManager.NETWORK_TYPE_HSPA:
                return true; // ~ 700-1700 kbps
            case TelephonyManager.NETWORK_TYPE_HSUPA:
                return true; // ~ 1-23 Mbps
            case TelephonyManager.NETWORK_TYPE_UMTS:
                return true; // ~ 400-7000 kbps
            case TelephonyManager.NETWORK_TYPE_EHRPD:
                return true; // ~ 1-2 Mbps
            case TelephonyManager.NETWORK_TYPE_EVDO_B:
                return true; // ~ 5 Mbps
            case TelephonyManager.NETWORK_TYPE_HSPAP:
                return true; // ~ 10-20 Mbps
            case TelephonyManager.NETWORK_TYPE_IDEN:
                return false; // ~25 kbps
            case TelephonyManager.NETWORK_TYPE_LTE:
                return true; // ~ 10+ Mbps
            case TelephonyManager.NETWORK_TYPE_UNKNOWN:
                return false;
            default:
                return false;
        }
    }

    //获取手机运营商
    public String getProvidersName() {
        String ProvidersName = null;
        // 返回唯一的用户ID;就是这张卡的编号神马的
        String IMSI = ((TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE)).getSubscriberId();
        // IMSI号前面3位460是国家，紧接着后面2位00 02是中国移动，01是中国联通，03是中国电信。
        if (IMSI.startsWith("46000") || IMSI.startsWith("46002")) {
            ProvidersName = "中国移动";
        } else if (IMSI.startsWith("46001")) {
            ProvidersName = "中国联通";
        } else if (IMSI.startsWith("46003")) {
            ProvidersName = "中国电信";
        }
        return ProvidersName;
    }

    //获取屏幕分辨率
    public String getScreenResolution(){
        WindowManager windowManager = getWindowManager();
        Display display = windowManager.getDefaultDisplay();
        int screenWidth = display.getWidth();
        int screenHeight = display.getHeight();

        return screenWidth + "*" + screenHeight;
    }