Android连接WiFi

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/weixin_40391500/article/details/90402043

WiFi打开、连接、关闭

/**
 * WiFi连接管理
 * 申请权限
 * <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
 * <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
 * <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
 * <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 * 动态权限
 * Manifest.permission.ACCESS_COARSE_LOCATION
 * Manifest.permission.ACCESS_FINE_LOCATION
 *
 */
public class WifiUtils {
    private static WifiUtils utils = null;

    public WifiUtils(Context context){
        wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    }

    public static WifiUtils getInstance(Context context){
        if (utils == null){
            synchronized (WifiUtils.class){
                if (utils == null){
                    utils = new WifiUtils(context);
                }
            }
        }
        return utils;
    }

    private WifiManager wifiManager;

    /**
     * wifi是否打开
     * @return
     */
    public boolean isWifiEnable(){
        boolean isEnable = false;
        if (wifiManager != null){
            if (wifiManager.isWifiEnabled()){
                isEnable = true;
            }
        }
        return isEnable;
    }

    /**
     * 打开WiFi
     */
    public void openWifi(){
        if (wifiManager != null && !isWifiEnable()){
            wifiManager.setWifiEnabled(true);
        }
    }

    /**
     * 关闭WiFi
     */
    public void closeWifi(){
        if (wifiManager != null && isWifiEnable()){
            wifiManager.setWifiEnabled(false);
        }
    }

    /**
     * 获取WiFi列表
     * @return
     */
    public List<ScanResult> getWifiList(){
        List<ScanResult> resultList = new ArrayList<>();
        if (wifiManager != null && isWifiEnable()){
            resultList.addAll(wifiManager.getScanResults());
        }
        return resultList;
    }

    /**
     * 有密码连接
     * @param ssid
     * @param pws
     */
    public void connectWifiPws(String ssid, String pws){
        wifiManager.disableNetwork(wifiManager.getConnectionInfo().getNetworkId());
        int netId = wifiManager.addNetwork(getWifiConfig(ssid, pws, true));
        wifiManager.enableNetwork(netId, true);
    }

    /**
     * 无密码连接
     * @param ssid
     */
    public void connectWifiNoPws(String ssid){
        wifiManager.disableNetwork(wifiManager.getConnectionInfo().getNetworkId());
        int netId = wifiManager.addNetwork(getWifiConfig(ssid, "", false));
        wifiManager.enableNetwork(netId, true);
    }

    /**
     * wifi设置
     * @param ssid
     * @param pws
     * @param isHasPws
     */
    private WifiConfiguration getWifiConfig(String ssid, String pws, boolean isHasPws){
        WifiConfiguration config = new WifiConfiguration();
        config.allowedAuthAlgorithms.clear();
        config.allowedGroupCiphers.clear();
        config.allowedKeyManagement.clear();
        config.allowedPairwiseCiphers.clear();
        config.allowedProtocols.clear();
        config.SSID = "\"" + ssid + "\"";

        WifiConfiguration tempConfig = isExist(ssid);
        if(tempConfig != null) {
            wifiManager.removeNetwork(tempConfig.networkId);
        }
        if (isHasPws){
            config.preSharedKey = "\""+pws+"\"";
            config.hiddenSSID = true;
            config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
            config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
            config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
            config.status = WifiConfiguration.Status.ENABLED;
        }else {
            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
        }
        return config;
    }

    /**
     * 得到配置好的网络连接
     * @param ssid
     * @return
     */
    private WifiConfiguration isExist(String ssid) {
        List<WifiConfiguration> configs = wifiManager.getConfiguredNetworks();
        for (WifiConfiguration config : configs) {
            if (config.SSID.equals("\""+ssid+"\"")) {
                return config;
            }
        }
        return null;
    }
}

	<receiver android:name=".MyBroadcastReceiver">
         <intent-filter android:priority="1000">
             <action android:name="android.intent.action.CONFIGURATION_CHANGED"/>
             <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
             <action android:name="android.net.wifi.STATE_CHANGE" />
         </intent-filter>
    </receiver>
public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent != null
                && WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())){
            Log.e("======", "NETWORK_STATE_CHANGED_ACTION");
            Parcelable parcelable = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
            if (parcelable != null){
                NetworkInfo networkInfo = (NetworkInfo) parcelable;
                NetworkInfo.State state = networkInfo.getState();
                boolean isConnect = state == NetworkInfo.State.CONNECTED;
                Log.e("======", "isConnect=" + isConnect);
            }
        }
    }
}