Android 监听网络连接状态，判断网络连接方式，判断网络是否连接，9.0网络连接

1、添加权限

2、创建监听广播NetWorkChangReceiver

 

public class NetWorkChangReceiver extends BroadcastReceiver {

    /**
     * 获取连接类型
     *
     * @param type
     * @return
     */
    private String getConnectionType(int type) {
        String connType = "";
        if (type == ConnectivityManager.TYPE_MOBILE) {
            connType = "3G网络数据";
        } else if (type == ConnectivityManager.TYPE_WIFI) {
            connType = "WIFI网络";
        }
        return connType;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {// 监听wifi的打开与关闭，与wifi的连接无关
            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);
            Log.e("lgqTAG", "wifiState:" + wifiState);
            switch (wifiState) {
                case WifiManager.WIFI_STATE_DISABLED:
                    break;
                case WifiManager.WIFI_STATE_DISABLING:
                    break;
            }
        }
        // 监听网络连接，包括wifi和移动数据的打开和关闭,以及连接上可用的连接都会接到监听
        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
            //获取联网状态的NetworkInfo对象
            NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
            if (info != null) {
                //如果当前的网络连接成功并且网络连接可用
                if (NetworkInfo.State.CONNECTED == info.getState() && info.isAvailable()) {
                    if (info.getType() == ConnectivityManager.TYPE_WIFI || info.getType() == ConnectivityManager.TYPE_MOBILE) {
                        Log.i("lgqTAG", getConnectionType(info.getType()) + "连上");
                    }
                } else {
                    Log.i("lgqTAG", getConnectionType(info.getType()) + "断开");
                }
            }
        }
    }
}

3、配置广播

4、注册广播

private NetWorkChangReceiver netWorkChangReceiver;

netWorkChangReceiver = new NetWorkChangReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(netWorkChangReceiver, filter);

 5、退出时

 unregisterReceiver(netWorkChangReceiver);

2、判断网络连接方式——wifi。2G，3G。4G。5G

public class Constants {
    /**
     * Unknown network class
     */
    public static final int NETWORK_CLASS_UNKNOWN = 0;

    /**
     * wifi net work
     */
    public static final int NETWORK_WIFI = 1;

    /**
     * "2G" networks
     */
    public static final int NETWORK_CLASS_2_G = 2;

    /**
     * "3G" networks
     */
    public static final int NETWORK_CLASS_3_G = 3;

    /**
     * "4G" networks
     */
    public static final int NETWORK_CLASS_4_G = 4;

}

public static int getNetWorkClass(Context context) {
    TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);

    switch (telephonyManager.getNetworkType()) {
        case TelephonyManager.NETWORK_TYPE_GPRS:
        case TelephonyManager.NETWORK_TYPE_EDGE:
        case TelephonyManager.NETWORK_TYPE_CDMA:
        case TelephonyManager.NETWORK_TYPE_1xRTT:
        case TelephonyManager.NETWORK_TYPE_IDEN:
            return Constants.NETWORK_CLASS_2_G;

        case TelephonyManager.NETWORK_TYPE_UMTS:
        case TelephonyManager.NETWORK_TYPE_EVDO_0:
        case TelephonyManager.NETWORK_TYPE_EVDO_A:
        case TelephonyManager.NETWORK_TYPE_HSDPA:
        case TelephonyManager.NETWORK_TYPE_HSUPA:
        case TelephonyManager.NETWORK_TYPE_HSPA:
        case TelephonyManager.NETWORK_TYPE_EVDO_B:
        case TelephonyManager.NETWORK_TYPE_EHRPD:
        case TelephonyManager.NETWORK_TYPE_HSPAP:
            return Constants.NETWORK_CLASS_3_G;

        case TelephonyManager.NETWORK_TYPE_LTE:
            return Constants.NETWORK_CLASS_4_G;

        default:
            return Constants.NETWORK_CLASS_UNKNOWN;
    }
}

public static int getNetWorkStatus(Context context) {//等于1时是wifi网络，等于4是4G网络，等于3是3G网络
    int netWorkType = Constants.NETWORK_CLASS_UNKNOWN;

    ConnectivityManager connectivityManager = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

    if (networkInfo != null && networkInfo.isConnected()) {
        int type = networkInfo.getType();

        if (type == ConnectivityManager.TYPE_WIFI) {
            netWorkType = Constants.NETWORK_WIFI;
        } else if (type == ConnectivityManager.TYPE_MOBILE) {
            netWorkType = getNetWorkClass(context);
        }
    }

    return netWorkType;
}

 

3、判断网络是否连接

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

 

9.0网络访问方法：application添加 android:usesCleartextTraffic="true" 即可