WifiNetworkAdapter.java

/*
 * Copyright (C) 2013 The WLANAudit project contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package es.glasspixel.wlanaudit.adapters;

import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

import es.glasspixel.wlanaudit.R;

/**
 * This class adapts the data obtained from the WiFi supplicant to a format
 * suitable to be displayed in a ListView.
 *
 * @author Roberto Estrada
 */
public class WifiNetworkAdapter extends ArrayAdapter<ScanResult> {

    public static final int[] ENCRYPTED_STATE_SET = {R.attr.state_encrypted};

    public static final int SECURITY_NONE = 0;
    private static final int SECURITY_WEP = 1;
    private static final int SECURITY_PSK = 2;
    private static final int SECURITY_EAP = 3;

    public static final int MAX_SIGNAL_STRENGTH_LEVEL = 4;

    public WifiNetworkAdapter(Context context, int textViewResourceId,
                              List<ScanResult> objects) {
        super(context, textViewResourceId, objects);
    }

    /**
     * {@inheritDoc}
     */
    public View getView(int position, View convertView, ViewGroup parent) {
        View listItem = convertView;
        // If the view is null, we need to inflate it from XML layout
        if (listItem == null) {
            // HACK!!
            getContext().setTheme(R.style.Sherlock___Theme_DarkActionBar);
            // END HACK!!
            LayoutInflater inflater = LayoutInflater.from(getContext());
            listItem = inflater.inflate(R.layout.network_list_element_layout,
                    null);
        }
        ScanResult wifiNetwork = getItem(position);
        if (wifiNetwork != null) {
            // We need to get handles to each element of the row layout
            ImageView networkIcon = (ImageView) listItem
                    .findViewById(R.id.networkSecurityIcon);
            TextView networkName = (TextView) listItem
                    .findViewById(R.id.networkName);
            TextView networkDetails = (TextView) listItem
                    .findViewById(R.id.networkDetails);
            // Once the handles are acquired, we're ready to populate the list
            // entry
            int signalLevel = WifiManager.calculateSignalLevel(
                    wifiNetwork.level, MAX_SIGNAL_STRENGTH_LEVEL);
            networkIcon.setImageLevel(signalLevel);
            if (getSecurity(wifiNetwork) != SECURITY_NONE) {
                // Set an icon of encrypted wi-fi hotspot
                networkIcon.setImageState(ENCRYPTED_STATE_SET, false);
            }
            // Setting the network name
            networkName.setText(wifiNetwork.SSID);
            // Setting the network details
            networkDetails.setText(wifiNetwork.BSSID);
        }
        return listItem;
    }

    /**
     * Returns the security method used in the passed scan result
     *
     * @param result The scan result to examine its security.
     * @return The security used in this Wifi point.
     */
    public static int getSecurity(ScanResult result) {
        if (result.capabilities.contains("WEP")) {
            return SECURITY_WEP;
        } else if (result.capabilities.contains("PSK")) {
            return SECURITY_PSK;
        } else if (result.capabilities.contains("EAP")) {
            return SECURITY_EAP;
        }
        return SECURITY_NONE;
    }
}