NetworkHelper.java

package com.threeH.MyExhibition.tools;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;
import android.telephony.TelephonyManager;

/**
 * @author brain
 * @Description:用于判断手机网络连接状态的工具类.
 * @Date 2011-12-14 下午12:09:12
 */
public class NetworkHelper {

    public static final int TYPE_WIFI = 0;
    public static final int TYPE_FAST_MOBILE = 1;
    public static final int TYPE_NORMAL_MOBILE = 2;
    private Context mCon;
    private static NetworkHelper mNetHelper;

    public NetworkHelper(Context mCon) {
        this.mCon = mCon;
    }

    public static NetworkHelper getInstance(Context mCon) {
        if (mNetHelper == null) {
            mNetHelper = new NetworkHelper(mCon);
        }
        return mNetHelper;
    }

    /**
     * 判断手机是否处于连接网络或断网状态.
     */
    public boolean isConnected() {
        ConnectivityManager mConManager = (ConnectivityManager) mCon.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (mConManager != null) {
            NetworkInfo info = mConManager.getActiveNetworkInfo();
            if (info != null && info.isConnectedOrConnecting()) {
                if (info.getState() == State.CONNECTED) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 检查手机网络是否正常(可连接或不可连接2种状态)
     */
    public boolean isNetSucces() {
        ConnectivityManager cwjManager = (ConnectivityManager) mCon.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = cwjManager.getActiveNetworkInfo();
        if (info != null && info.isAvailable()) {
            return true;
        } else {
            return false;
        }
    }

    public int getNetType() {
        ConnectivityManager manager = (ConnectivityManager) mCon.getSystemService(Context.CONNECTIVITY_SERVICE);
        State mobile = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();
        State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();
        TelephonyManager tm = (TelephonyManager) mCon.getSystemService(Context.TELEPHONY_SERVICE); // 获得手机SIMType 　　
        int subType = tm.getNetworkType();
        // 如果3G、wifi、2G等网络状态是连接的，则退出，否则显示提示信息进入网络设置界面
        if (wifi == State.CONNECTED || wifi == State.CONNECTING) {
            return TYPE_WIFI;
        }
        if (mobile == State.CONNECTED || mobile == State.CONNECTING) {
            return isConnectionFast(ConnectivityManager.TYPE_MOBILE, subType) ? TYPE_FAST_MOBILE : TYPE_NORMAL_MOBILE;
        }
        return -1;
    }

    public static boolean isConnectionFast(int type, int subType) {
        if (type == ConnectivityManager.TYPE_WIFI) {
            return true;
        } else if (type == ConnectivityManager.TYPE_MOBILE) {
            switch (subType) {
                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
                // NOT AVAILABLE YET IN API LEVEL 7
                // case Connectivity.NETWORK_TYPE_EHRPD:
                // return true; // ~ 1-2 Mbps
                // case Connectivity.NETWORK_TYPE_EVDO_B:
                // return true; // ~ 5 Mbps
                // case Connectivity.NETWORK_TYPE_HSPAP:
                // return true; // ~ 10-20 Mbps
                // case Connectivity.NETWORK_TYPE_IDEN:
                // return false; // ~25 kbps
                // case Connectivity.NETWORK_TYPE_LTE:
                // return true; // ~ 10+ Mbps
                // Unknown
                case TelephonyManager.NETWORK_TYPE_UNKNOWN:
                    return false;
                default:
                    return false;
            }
        } else {
            return true;
        }
    }

    public String getAPN() {
        try {
            ConnectivityManager manager = (ConnectivityManager) mCon.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netWrokInfo = manager.getActiveNetworkInfo();
            String apnString = netWrokInfo.getExtraInfo();
            if (apnString != null) {
                return apnString;
            } else {
                return "";
            }
        } catch (Exception e) {
            return "";
        }
    }
}