从后台返回应用后,我想检测我的wifi连接是否已更改(如果已更改为蜂窝或其他wifi,但不相同)。有什么办法吗? 我尝试了下面的代码,但是它不起作用,即使我保持连接状态,每次返回应用程序时,它都会不断启动。
IntentFilter networkIntent = new IntentFilter();
networkIntent.addAction("android.net.conn.CONNECTIVITY_CHANGE");
networkIntent.addAction(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
registerReceiver(wifichangereceiver, networkIntent);
下面是我的接收者:
public final BroadcastReceiver wifichangereceiver = new BroadcastReceiver() {
@Override
public void onReceive(final Context context, final Intent intent) {
final ConnectivityManager connMgr = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
final android.net.NetworkInfo wifi = connMgr
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (wifi.isConnected()) {
hasWifiChanged = true;
} else {
hasWifiChanged = false;
}
}
答案 0 :(得分:1)
为什么不在变量中注册wifi ID,然后在连接WiFi时,可以将新的wifi ID与旧的wifi ID进行比较?
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
String ssid = wifiInfo.getSSID();
int networkid = wifiInfo.getNetworkId();
如果networkid在您的设备上返回O,请改用SSID。