广播接受变化

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/><uses-permission android:name="android.permission.INTERNET"/><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/><receiver android:name="com.rockvr.utils.net.NetworkConnectChangedReceiver">     <intent-filter>         <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>         <action android:name="android.net.wifi.WIFI_STATE_CHANGED"/>         <action android:name="android.net.wifi.STATE_CHANGE"/>     </intent-filter> </receiver>

public class NetworkConnectChangedReceiver extends BroadcastReceiver {    private static final String TAG = "NetworkConnectChanged";    @Override    public void onReceive(Context context, Intent intent) {        Log.d(TAG, "onReceive() called with: context = [" + context + "], intent = [" + intent + "]");        // 这个监听wifi的打开与关闭与wifi的连接无关        if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);            Log.i(TAG, "onReceive: wifiState " + wifiState);            switch (wifiState) {                case WifiManager.WIFI_STATE_DISABLED:                    NetUtils.setEnableWifi(false);                    break;                case WifiManager.WIFI_STATE_DISABLING:                    break;                case WifiManager.WIFI_STATE_ENABLED:                    NetUtils.setEnableWifi(true);                    break;                case WifiManager.WIFI_STATE_UNKNOWN:                    break;                default:                    break;            }        }        // 这个监听wifi的连接状态，即是否连上了一个有效路由，当上面的广播状态是        // WIFI_STATE_DISABLED和WIFI_STATE_DISABLING时，根本不会接收到这个广播.        if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {            Parcelable parcelableExtra = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);            if (parcelableExtra != null) {                NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;                NetworkInfo.State state = networkInfo.getState();                NetUtils.setWifi(state == NetworkInfo.State.CONNECTED);            }        }        // 这个监听网络连接的设置，包括wifi和移动数据的打开和关闭        // 最好是用这个。最大的弊端是比较慢        // 如果只监听wifi，上面的比较合适        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo activeNetwork = manager.getActiveNetworkInfo();            if (activeNetwork != null) {                if (activeNetwork.isConnected()) {                    if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {                        NetUtils.setWifi(true);                    } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {                        NetUtils.setMobile(true);                    }                }            } else {                Log.i(TAG, "There is no network connection");            }        }    }}

主动请求网络状态

private static final int NETWORK_TYPE_NONE = 1;private static final int NETWORK_TYPE_MOBILE = NETWORK_TYPE_NONE << 1;private static final int NETWORK_TYPE_WIFI = NETWORK_TYPE_MOBILE << 1;public static boolean isNetValid(Context context) {    if (getNetworkType(context) == NETWORK_TYPE_NONE) {        return false;    }    return true;}public static boolean isMobileNet(Context context) {    if (getNetworkType(context) == NETWORK_TYPE_MOBILE) {        return true;    }    return false;}public static boolean isWifiNet(Context context) {    if (getNetworkType(context) == NETWORK_TYPE_WIFI) {        return true;    }    return false;}private static int getNetworkType(Context context) {    ConnectivityManager connMgr = (ConnectivityManager) context.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();    if (networkInfo != null) {        switch (networkInfo.getType()) {            case ConnectivityManager.TYPE_MOBILE:                return NETWORK_TYPE_MOBILE;            case ConnectivityManager.TYPE_WIFI:                return NETWORK_TYPE_WIFI;        }    }    return NETWORK_TYPE_NONE;}

获取WIFI的IP地址

 public static String getLocalIp(Context context) {  WifiManager wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);    WifiInfo wifiInfo = wifiManager.getConnectionInfo();    int ipAddress = wifiInfo.getIpAddress();    if (ipAddress == 0) return "Not connect wifi";    return ((ipAddress & 0xff) + "." + (ipAddress >> 8 & 0xff) + "." + (ipAddress >> 16 & 0xff) + "." + (ipAddress >> 24 & 0xff));}

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