首先要获取 WifiManager，后面的所有操作基本上都要用到。
val wifiManager = getSystemService(Context.WIFI_SERVICE) as WifiManager
打开关闭WIFI
打开或者关闭WIFI直接调用 WifiManager.isWifiEnabled = true / false 就可以了，但是要监听操作结果的话，有两种方法，一个是监听广播，一个是写循环主动查询，我个人觉得还是主动查询可靠点，下面是我封装的方法：
/**
* 异步打开、关闭wifi，并回调。10秒超时。
* @param enabled 打开/关闭 WIFI。
* @param callback 结果回调，success：打开/关闭成功。UI线程回调。
*/
private fun WifiManager.enable(enabled: Boolean, callback: (success: Boolean) -> Unit) {
GlobalScope.launch(Dispatchers.IO) {
// 当前状态一致，直接回调
if (isWifiEnabled == enabled) {
GlobalScope.launch(Dispatchers.Main) { callback.invoke(true) }
return@launch
}
isWifiEnabled = enabled
repeat(10) {
delay(1000)
// 当前状态一致，直接回调
if (isWifiEnabled == enabled) {
GlobalScope.launch(Dispatchers.Main) { callback.invoke(true) }
return@launch
}
}
GlobalScope.launch(Dispatchers.Main) { callback.invoke(false) }
}
}
// 这样调用即可
wifiManager.enable(isChecked) { success ->
// 直接用 wifiManager.isWifiEnabled 判断更可靠点
if (wifiManager.isWifiEnabled) {
// WIFI 已打开
} else {
// WIFI 已关闭
}
}
扫描WIFI
扫描结果通过 wifiManager.scanResults 获取，但是获取到的可能是以前的扫描结果，所以我们要等收到广播后再获取结果。
// 广播接收器
private val receiver = object : BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
if (intent?.action == WifiManager.SCAN_RESULTS_AVAILABLE_ACTION) {
wifiManager.scanResults.filter {
!TextUtils.isEmpty(it.SSID)
}.forEach {scanResult->
LogUtils.d(TAG, scanResult)
// 展示列表
}
}
}
}
// 注册广播
registerReceiver(receiver, IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION))
// 扫描
wifiManager.startScan()
// 注销广播
unregisterReceiver(receiver)
连接WIFI
连接WIFI要调用好几个接口，首先要根据帐号密码生成WifiConfiguration，然后addNetwork(config)，返回-1表示失败，addNetwork只是把配置添加到配置列表，还需要调用 enableNetwork(networkId, true)才是真正的连接WIFI，最后调用saveConfiguration保存一下。操作结果依然是通过广播接收。
1、生成WifiConfiguration比较复杂，这里写了个独立的方法，代码是网上的稍作修改了。
// 获取已经存在的SSID对应的配置
private fun WifiManager.getConfiguredNetwork(ssid: String): WifiConfiguration? {
configuredNetworks.forEach {
if (it.SSID == "\"$ssid\"") return it
}
return null
}
private fun WifiManager.createWifiConfiguration(ssid: String, password: String, scanResult: ScanResult? = null): WifiConfiguration {
// 判断是否已经存在
val config = getConfiguredNetwork(ssid)
if (config != null) {
LogUtils.d(TAG, "已经存在 $ssid 执行移除操作")
val successful = removeNetwork(config.networkId)
LogUtils.d(TAG, "移除操作 ${if (successful) "成功" else "失败"}")
}
val capabilities = scanResult?.capabilities ?: "wpa"
return WifiConfiguration().apply {
allowedAuthAlgorithms.clear()
allowedGroupCiphers.clear()
allowedKeyManagement.clear()
allowedPairwiseCiphers.clear()
allowedProtocols.clear()
SSID = "\"" + ssid + "\""
when {
capabilities.contains("wep", ignoreCase = true) -> {
hiddenSSID = true
wepKeys[0] = "\"" + password + "\""
allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED)
allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP)
allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP)
allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40)
allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104)
allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)
wepTxKeyIndex = 0
}
capabilities.contains("psk", ignoreCase = true) -> {
preSharedKey = "\"" + password + "\""
hiddenSSID = true
allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN)
allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP)
allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK)
allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP)
allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP)
allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP)
status = WifiConfiguration.Status.ENABLED
}
else -> {
// 没有密码
allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)
}
}
}
}
2、连接
// 这里增加个变量多重判断一下
private var enableNetworkSuccessful = false
private fun connect() {
val ssid = et_name.text.toString()
val password = et_password.text.toString()
val config = wifiManager.createWifiConfiguration(ssid, password, wifiWrapper?.wifi)
LogUtils.d(TAG, "创建 WifiConfiguration：$config")
val networkId = wifiManager.addNetwork(config)
LogUtils.d(TAG, "addNetwork 返回：$networkId")
enableNetworkSuccessful = wifiManager.enableNetwork(networkId, true)
LogUtils.d(TAG, "enableNetwork 返回：$enableNetworkSuccessful")
if (enableNetworkSuccessful) {
val successful = wifiManager.saveConfiguration()
LogUtils.d(TAG, "saveConfiguration 返回：$successful")
}
}
3、监听结果
private val receiver = object : BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
when (intent?.action) {
WifiManager.SUPPLICANT_STATE_CHANGED_ACTION -> {
LogUtils.i(TAG, "收到广播：SUPPLICANT_STATE_CHANGED_ACTION")
val error = intent.getIntExtra(WifiManager.EXTRA_SUPPLICANT_ERROR, 123)
if (WifiManager.ERROR_AUTHENTICATING == error) {
LogUtils.e(TAG, "密码错误")
ToastUtils.show("密码错误")
progressDialog.dismiss()
}
}
WifiManager.NETWORK_STATE_CHANGED_ACTION -> {
LogUtils.i(TAG, "收到广播：NETWORK_STATE_CHANGED_ACTION")
try {
val info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO) as? NetworkInfo
LogUtils.i(TAG, "EXTRA_NETWORK_INFO=$info")
when (info?.state) {
NetworkInfo.State.CONNECTING -> ToastUtils.show("正在连接...")
NetworkInfo.State.CONNECTED -> {
// 连接成功
if (enableNetworkSuccessful) {
LogUtils.i(TAG, "CONNECTED")
ToastUtils.show("连接成功")
successful = true
progressDialog.dismiss()
dismiss()
}
}
else -> Unit
}
} catch (e: Exception) {
LogUtils.printStackTrace(e)
}
}
}
}
}
// 注册广播
registerReceiver(receiver, IntentFilter().apply {
addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION)
addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION)
})
// 注销广播
unregisterReceiver(receiver)
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