Android工具类之 监听网络状态 检查是否联网

• 获取当前网络类型
• 检测网络是否可用
• 通过广播监听网络状态

1. 获取当前网络类型

/**
     * 获取当前网络类型
     *
     * @return 0：没有网络 1：WIFI网络 2：WAP网络 3：NET网络
     */
    public static int getNetworkType(Context context) {
        int netType = 0;
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
        if (networkInfo == null) {
            return netType;
        }
        int nType = networkInfo.getType();
        if (nType == ConnectivityManager.TYPE_MOBILE) {
            String extraInfo = networkInfo.getExtraInfo();
            if (!TextUtils.isEmpty(extraInfo)) {
                if (extraInfo.toLowerCase(Locale.getDefault()).equals("cmnet")) {
                    netType = NETTYPE_CMNET;
                } else {
                    netType = NETTYPE_CMWAP;
                }
            }
        } else if (nType == ConnectivityManager.TYPE_WIFI) {
            netType = NETTYPE_WIFI;
        }
        return netType;
    }

2. 检测网络是否可用

/**
     * 检测网络是否可用
     *
     * @return
     */
    public static boolean isNetworkConnected(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo ni = cm.getActiveNetworkInfo();
        return ni != null && ni.isConnectedOrConnecting();
    }

3. 通过广播监听网络状态

• 1 . 注册广播 动态静态都可以

静态注册
 
        
            
                
                
                
            
        

• 2 .创建广播

/**
 * 自定义检查手机网络状态是否切换的广播接受器  
 */
public class NetBroadcastReceiver extends BroadcastReceiver {
    public NetEvevt evevt = BaseActivity.evevt;

    @Override
    public void onReceive(Context context, Intent intent) {
        // 如果相等的话就说明网络状态发生了变化
        if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
            int netWorkState = NetUtils.getNetWorkState(context);
            // 接口回调传过去状态的类型
            evevt.onNetChange(netWorkState);
        }
    }

    // 自定义接口
    public interface NetEvevt {
         void onNetChange(int netMobile);
    }
}

• 3. 在BaseActivity中实现回调监听

/**
     * 网络类型
     */
    private int netMobile;
    public static NetBroadcastReceiver.NetEvevt evevt;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //监听网络变化
        evevt = this;
        inspectNet();

    }



/**
     * 网络变化之后的类型
     */
    @Override
    public void onNetChange(int netMobile) {
        this.netMobile = netMobile;
        if (isNetConnect()) {
            tv_netstates.setVisibility(View.GONE);
        } else {
            tv_netstates.setVisibility(View.VISIBLE);
        }
    }

    /**
     * 判断有无网络 。
     *
     * @return true 有网, false 没有网络.
     */
    public boolean isNetConnect() {
//        public static final int NETTYPE_WIFI = 0;
//        public static final int NETTYPE_NONE = 1;
//        public static final int NETTYPE_2G = 2;
//        public static final int NETTYPE_3G = 3;
//        public static final int NETTYPE_4G = 4;
        if (netMobile == 1) {
            return false;
        } else {
            return true;
        }
    }

4. 附上大神的工具类

public class NetStateUtils {

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

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

    /**
     * 判断当前网络是否是2G网络
     *
     * @param context
     * @return boolean
     */
    public static boolean is2G(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
        if (activeNetInfo != null
                && (activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_EDGE
                || activeNetInfo.getSubtype() == TelephonyManager.NETWORK_TYPE_GPRS || activeNetInfo
                .getSubtype() == TelephonyManager.NETWORK_TYPE_CDMA)) {
            return true;
        }
        return false;
    }

    /**
     * wifi是否打开
     */
    public static boolean isWifiEnabled(Context context) {
        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);
    }

    /**
     * 判断是否有网络连接
     *
     * @param context
     * @return
     */
    public static boolean isNetworkConnected(Context context) {
        if (context != null) {
            // 获取手机所有连接管理对象(包括对wi-fi,net等连接的管理)
            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context
                    .CONNECTIVITY_SERVICE);
            // 获取NetworkInfo对象
            NetworkInfo networkInfo = manager.getActiveNetworkInfo();
            //判断NetworkInfo对象是否为空
            if (networkInfo != null)
                return networkInfo.isAvailable();
        }
        return false;
    }

    /**
     * 判断MOBILE网络是否可用
     *
     * @param context
     * @param context
     * @return
     */
    public static boolean isMobileConnected(Context context) {
        if (context != null) {
            //获取手机所有连接管理对象(包括对wi-fi,net等连接的管理)
            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context
                    .CONNECTIVITY_SERVICE);
            //获取NetworkInfo对象
            NetworkInfo networkInfo = manager.getActiveNetworkInfo();
            //判断NetworkInfo对象是否为空 并且类型是否为MOBILE
            if (networkInfo != null && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE)
                return networkInfo.isAvailable();
        }
        return false;
    }

    /**
     * 获取当前网络连接的类型信息
     * 原生
     *
     * @param context
     * @return
     */
    public static int getConnectedType(Context context) {
        if (context != null) {
            //获取手机所有连接管理对象
            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context
                    .CONNECTIVITY_SERVICE);
            //获取NetworkInfo对象
            NetworkInfo networkInfo = manager.getActiveNetworkInfo();
            if (networkInfo != null && networkInfo.isAvailable()) {
                //返回NetworkInfo的类型
                return networkInfo.getType();
            }
        }
        return -1;
    }

    /**
     * 获取当前的网络状态 ：没有网络-0：WIFI网络1：4G网络-4：3G网络-3：2G网络-2
     * 自定义
     *
     * @param context
     * @return
     */
    public static int getAPNType(Context context) {
        //结果返回值
        int netType = 0;
        //获取手机所有连接管理对象
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context
                .CONNECTIVITY_SERVICE);
        //获取NetworkInfo对象
        NetworkInfo networkInfo = manager.getActiveNetworkInfo();
        //NetworkInfo对象为空 则代表没有网络
        if (networkInfo == null) {
            return netType;
        }
        //否则 NetworkInfo对象不为空 则获取该networkInfo的类型
        int nType = networkInfo.getType();
        if (nType == ConnectivityManager.TYPE_WIFI) {
            //WIFI
            netType = 1;
        } else if (nType == ConnectivityManager.TYPE_MOBILE) {
            int nSubType = networkInfo.getSubtype();
            TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService
                    (Context.TELEPHONY_SERVICE);
            //3G   联通的3G为UMTS或HSDPA 电信的3G为EVDO
            if (nSubType == TelephonyManager.NETWORK_TYPE_LTE
                    && !telephonyManager.isNetworkRoaming()) {
                netType = 4;
            } else if (nSubType == TelephonyManager.NETWORK_TYPE_UMTS
                    || nSubType == TelephonyManager.NETWORK_TYPE_HSDPA
                    || nSubType == TelephonyManager.NETWORK_TYPE_EVDO_0
                    && !telephonyManager.isNetworkRoaming()) {
                netType = 3;
                //2G 移动和联通的2G为GPRS或EGDE，电信的2G为CDMA
            } else if (nSubType == TelephonyManager.NETWORK_TYPE_GPRS
                    || nSubType == TelephonyManager.NETWORK_TYPE_EDGE
                    || nSubType == TelephonyManager.NETWORK_TYPE_CDMA
                    && !telephonyManager.isNetworkRoaming()) {
                netType = 2;
            } else {
                netType = 2;
            }
        }
        return netType;
    }

    /**
     * 判断GPS是否打开
     * ACCESS_FINE_LOCATION权限
     *
     * @param context
     * @return
     */
    public static boolean isGPSEnabled(Context context) {
        //获取手机所有连接LOCATION_SERVICE对象
        LocationManager locationManager = ((LocationManager) context.getSystemService(Context
                .LOCATION_SERVICE));
        return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    }

    /**
     * 获得本机ip地址
     *
     * @return
     */
    public static String GetHostIp() {
        try {
            for (Enumeration en = NetworkInterface
                    .getNetworkInterfaces(); en.hasMoreElements(); ) {
                NetworkInterface intf = en.nextElement();
                for (Enumeration ipAddr = intf.getInetAddresses(); ipAddr
                        .hasMoreElements(); ) {
                    InetAddress inetAddress = ipAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()) {
                        return inetAddress.getHostAddress();
                    }
                }
            }
        } catch (SocketException ex) {
        } catch (Exception e) {
        }
        return null;
    }

    /**
     * 获取本机串号imei
     *
     * @param context
     * @return
     */
    public static String getIMEI(Context context) {
        TelephonyManager telephonyManager = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        return telephonyManager.getDeviceId();
    }

    /***
     * 判断是否有外网连接（普通方法不能判断外网的网络是否连接，比如连接上局域网）
     *
     * @return
     */

    public static final boolean ping() {

        String result = null;
        try {
            String ip = "www.baidu.com";// ping 的地址，可以换成任何一种可靠的外网
            Process p = Runtime.getRuntime().exec("ping -c 3 -w 100 " + ip);// ping网址3次
            // 读取ping的内容，可以不加
            InputStream input = p.getInputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(input));
            StringBuffer stringBuffer = new StringBuffer();
            String content = "";
            while ((content = in.readLine()) != null) {
                stringBuffer.append(content);
            }
            Log.d("------ping-----", "result content : " + stringBuffer.toString());
            // ping的状态
            int status = p.waitFor();
            if (status == 0) {
                result = "success";
                return true;
            } else {
                result = "failed";
            }
        } catch (IOException e) {
            result = "IOException";
        } catch (InterruptedException e) {
            result = "InterruptedException";
        } finally {
            Log.d("----result---", "result = " + result);
        }
        return false;

    }
}