android 连接指定wifi

本文牵涉kotlin和rxjava的相关知识

//查询wifi信息需要申请权限，权限工具类就不要在意了，重点在下面
PermissionUtils.permission(PermissionConstants.LOCATION).callback(object : PermissionUtils.SimpleCallback {override fun onGranted() {//通过授权后，开启一个等待框progressDialog.show()//    每2秒发送一次事件connectObs = Observable.interval(2, TimeUnit.SECONDS)//    取30次，还没连上就结束，算这次超时.take(30).subscribeOn(Schedulers.computation()).subscribe({//开启扫描WifiUtils.startScan()//连接WifiUtils.connect(padHotspotSsid, padHotspotPwd)}, {}, {if (progressDialog.isShowing) progressDialog.dismiss()ToastUtils.showShort("连接屏热点超时")})}override fun onDenied() {ToastUtils.showShort("您拒绝了请求位置权限，我们无法搜寻网络连接上屏，请在设置中打开")}}).request()
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WifiUtils

object WifiUtils {val wifiManager: WifiManager = Utils.getApp().applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManagerval connectivityManager: ConnectivityManager = Utils.getApp().applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManagerfun startScan() {if (!wifiManager.isWifiEnabled) wifiManager.isWifiEnabled = true;wifiManager.startScan()}fun getScanResult() = wifiManager.scanResultsfun connect(ssid: String, pwd: String): Boolean {
//      之前的写法是之前有连接的话先断连，后来发现小米华为这种一旦断连会特别积极的重连，导致指定的wifi抢不到
//      试过之后发现可以不用断，就注释掉了，直接走下面的代码进行连接
//        如果已经连上wifi了
//        if(NetworkUtils.isWifiConnected()) {直接忘掉
//            if(!wifiManager.removeNetwork(wifiManager.connectionInfo.networkId)) {忘不掉，至少尝试断连
//                wifiManager.disconnect()断连在某些手机依然可能会失败，或者返回true其实没断掉，或者断掉了立马又被重连。。等等
//            }
//        }//在扫描到的wifi中找ssid也就是wifi名相同的，如果没有说明没搜到，那么连不了，等下一次吧val scanResult = wifiManager.scanResults.singleOrNull { it.SSID == ssid }if (scanResult == null) {return false} else {//如果找到了wifi了，从配置表中搜索该wifi的配置config，也就是以前有没有连接过var success = false//注意configuredNetworks中的ssid，系统源码中加上了双引号，这里比对的时候要去掉val config = wifiManager.configuredNetworks.singleOrNull { it.SSID.replace("\"", "") == ssid }if (config != null) {//如果找到了，那么直接连接，不要调用wifiManager.addNetwork  这个方法会更改config的！
//                val netId = wifiManager.addNetwork(config)success = wifiManager. enableNetwork(config.networkId,true)} else {// 没找到的话，就创建一个新的配置，然后正常的addNetWork、enableNetwork即可val padWifiNetwork = createWifiConfig(scanResult.SSID, pwd, getCipherType(scanResult.capabilities))val netId = wifiManager.addNetwork(padWifiNetwork)success = wifiManager. enableNetwork(netId,true)}LogUtils.d("连接${scanResult.SSID}...$success")return success}}fun isConnected(ssid: String): Boolean {return if (wifiManager.isWifiEnabled) {wifiManager.connectionInfo.ssid.replace("\"", "") == ssid} else {false}}private fun createWifiConfig(ssid: String, password: String, type: WifiCapability): WifiConfiguration {//初始化WifiConfigurationval config = WifiConfiguration()config.allowedAuthAlgorithms.clear()config.allowedGroupCiphers.clear()config.allowedKeyManagement.clear()config.allowedPairwiseCiphers.clear()config.allowedProtocols.clear()//指定对应的SSIDconfig.SSID = "\"" + ssid + "\""//如果之前有类似的配置val tempConfig = wifiManager.configuredNetworks.singleOrNull { it.SSID == "\"$ssid\"" }if (tempConfig != null) {//则清除旧有配置  不是自己创建的network 这里其实是删不掉的wifiManager.removeNetwork(tempConfig.networkId)wifiManager.saveConfiguration()}//不需要密码的场景if (type == WifiCapability.WIFI_CIPHER_NO_PASS) {config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)//以WEP加密的场景} else if (type == WifiCapability.WIFI_CIPHER_WEP) {config.hiddenSSID = trueconfig.wepKeys[0] = "\"" + password + "\""config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN)config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED)config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)config.wepTxKeyIndex = 0//以WPA加密的场景，自己测试时，发现热点以WPA2建立时，同样可以用这种配置连接} else if (type == WifiCapability.WIFI_CIPHER_WPA) {config.preSharedKey = "\"" + password + "\""config.hiddenSSID = trueconfig.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}return config}fun getCipherType(capabilities: String): WifiCapability {return if (capabilities.contains("WEB")) {WifiCapability.WIFI_CIPHER_WEP} else if (capabilities.contains("PSK")) {WifiCapability.WIFI_CIPHER_WPA} else if (capabilities.contains("WPS")) {WifiCapability.WIFI_CIPHER_NO_PASS} else {WifiCapability.WIFI_CIPHER_NO_PASS}}fun getDhcpInfo(): String {val dhcpInfo = wifiManager.dhcpInforeturn intIP2StringIP(dhcpInfo.serverAddress)}fun intIP2StringIP(ip: Int): String {return (ip and 0xFF).toString() + "." +(ip shr 8 and 0xFF) + "." +(ip shr 16 and 0xFF) + "." +(ip shr 24 and 0xFF)}
}enum class WifiCapability {WIFI_CIPHER_WEP, WIFI_CIPHER_WPA, WIFI_CIPHER_NO_PASS
}
}
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