如何最好地检测连接失败?
我知道我们应该使用NetworkInfo.getState()
来获取连接状态,同时我还使用带有NETWORK_STATE_CHANGED_ACTION
的BroadcastReceiver来检测连接状态的变化。
我认为在广播接收器中检测DISCONNECTED
状态在这种情况下不匹配。
NetworkInfo.State.DISCONNECTED
仅意味着“已断开连接”,并不意味着连接失败。
使用WifiManager.SUPPLICANT_STATE_CHANGED_ACTION
注册接收器,以便在连接失败时得到通知。这可能是由于提供了无效的凭据来连接Wi-Fi。
private void registerReceiver() {
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
filter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);
registerReceiver(mReceiver, filter);
}
还有您的下面接收者
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
if (info != null) {
if (info.isConnected()) {
//connected
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
String ssid = wifiInfo.getSSID();
}
} else {
if (intent.getAction().equals(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION)) {
if (intent.hasExtra(WifiManager.EXTRA_SUPPLICANT_ERROR)) {
//failed to connect
}
}
}
};
public class WifiReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager conMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = conMan.getActiveNetworkInfo();
if (netInfo != null && netInfo.getType() == ConnectivityManager.TYPE_WIFI)
// Connection Successful
else
// Connection Failed
}
};