WiFi需要很长时间才能重新连接

Question

我希望在Android应用中实现更高的网络连接正常运行时间。当用户处于WiFi覆盖的边缘时，电话将失去连接。我的应用程序检测到这一点。

当用户再次进入覆盖范围时，有时需要很长时间（几分钟）才能重新建立与网络的连接。在Android WiFi管理器中，它有时会在切换到“已连接”之前长时间处于“已断开连接”状态（而非“关闭”状态）。该网络是标准的WPA2网络。

我尝试过这样的事情。每次连接丢失时，外部类都会执行ConnectionExecuter。

private void saveConnectionInfo() {
    connectionInfo = wiFiManager.getConnectionInfo();
}

private class ConnectExecuter extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(Void... params) {
        //Do not return before WiFi is enabled and connected
        while(!wiFiManager.isWifiEnabled() || !connected()) {
            try {
                logger.debug(TAG, "Enable");
                //Checks is WiFi is disabled, and turns it on in that case.
                WiFiEnablementManager.assureWiFiEnabled(wiFiManager);
                Thread.sleep(2500);
                //if WiFi is not connected then connect to the previous network
                logger.debug(TAG, wiFiManager.getConnectionInfo().toString());
                if(!connected()) {
                    logger.debug(TAG, "Reconnecting to network id: " + connectionInfo);
                    wiFiManager.enableNetwork(connectionInfo.getNetworkId(), true);
                    wiFiManager.reconnect();
                }
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                logger.error(TAG, e);
            }
        }
        return null;
    }

    private boolean connected() {
        if (wiFiManager.getConnectionInfo() != null && connectionInfo != null) {
            return wiFiManager.getConnectionInfo().getNetworkId() == connectionInfo.getNetworkId();
        }

        return false;
    }
}

public class WiFiEnablementManager {
    public static final ILogger logger = new Logger(WiFiEnablementManager.class.getSimpleName());

    public static void assureWiFiEnabled(WifiManager wifiManager) {

        if(!wifiManager.isWifiEnabled()){
            logger.info("WiFi status disabled: Enabling...");
            wifiManager.setWifiEnabled(true);
        }
    }
}

它似乎对Android 2.2有帮助，但在4.0上无效。睡眠语句（2500毫秒和3000毫秒）也可能不合理。欢迎任何投入。