连接到 Wifi Android 问
Connect To Wifi Android Q
我正在尝试使用以下代码连接到 wifi
val specifier = WifiNetworkSpecifier.Builder()
.setSsid(machineID).build()
val networkRequest = NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.setNetworkSpecifier(specifier)
.build()
val connectivityManager = context.applicationContext
.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
connectivityManager?.requestNetwork(networkRequest,object:ConnectivityManager.NetworkCallback(){
override fun onUnavailable() {
callback.onWifiConnected(WifiConstant.WIFI_IP_ADDRESS_INVALID)
}
override fun onAvailable(network: Network) {
val wifiInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
if (wifiInfo.isConnected)
callback.onWifiConnected("${getWifiManager()?.connectionInfo?.ipAddress!!}")
else
callback.onWifiConnected(WifiConstant.WIFI_IP_ADDRESS_INVALID)
}
})
但我总是在这一行遇到运行时错误
val specifier = WifiNetworkSpecifier.Builder()
错误如下：
2019-09-25 13:49:00.718 28556-28556/com.aloha.asiaiot E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.aloha.asiaiot, PID: 28556
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/net/wifi/WifiNetworkSpecifier$Builder;
at com.aloha.asiaiot.common.util.wifi.WifiConnectionManager.connectToWifi(WifiConnectionManager.kt:77)
at com.aloha.asiaiot.connectivity.devicescan.data.DeviceScanNetworkRepository.connectToWifi(DeviceScanNetworkRepository.kt:48)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanRepository.connectToWifi(DeviceScanRepository.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanUseCase.connectToWifi(DeviceScanUseCase.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.presentation.viewmodel.DeviceScanViewModel.connectToWifi(DeviceScanViewModel.kt:41)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.connectToGateway(DeviceScanFragment.kt:139)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.access$connectToGateway(DeviceScanFragment.kt:29)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment$onActivityCreated.onClick(DeviceScanFragment.kt:72)
at android.view.View.performClick(View.java:7339)
at android.widget.TextView.performClick(TextView.java:14221)
at android.view.View.performClickInternal(View.java:7305)
at android.view.View.access00(View.java:846)
at android.view.View$PerformClick.run(View.java:27787)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7058)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.net.wifi.WifiNetworkSpecifier$Builder" on path: DexPathList[[zip file "/data/app/com.aloha.asiaiot-k57tcS1ybEKsaCIu13TJnw==/base.apk"],nativeLibraryDirectories=[/data/app/com.aloha.asiaiot-k57tcS1ybEKsaCIu13TJnw==/lib/arm64, /system/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at com.aloha.asiaiot.common.util.wifi.WifiConnectionManager.connectToWifi(WifiConnectionManager.kt:77)
at com.aloha.asiaiot.connectivity.devicescan.data.DeviceScanNetworkRepository.connectToWifi(DeviceScanNetworkRepository.kt:48)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanRepository.connectToWifi(DeviceScanRepository.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanUseCase.connectToWifi(DeviceScanUseCase.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.presentation.viewmodel.DeviceScanViewModel.connectToWifi(DeviceScanViewModel.kt:41)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.connectToGateway(DeviceScanFragment.kt:139)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.access$connectToGateway(DeviceScanFragment.kt:29)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment$onActivityCreated.onClick(DeviceScanFragment.kt:72)
at android.view.View.performClick(View.java:7339)
at android.widget.TextView.performClick(TextView.java:14221)
at android.view.View.performClickInternal(View.java:7305)
at android.view.View.access00(View.java:846)
at android.view.View$PerformClick.run(View.java:27787)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7058)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
2019-09-25 13:49:00.747 28556-28556/com.aloha.asiaiot
我也尝试使用以下代码来解决较低的 SDK 问题：
if (Build.VERSION.SDK_INT< Build.VERSION_CODES.Q) {
val wifiConfiguration = WifiConfiguration()
wifiConfiguration.SSID = String.format("\"%s\"", machineID)
wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)
wifiConfiguration.status = WifiConfiguration.Status.ENABLED
wifiConfiguration.priority = 40
val wifiManager = getWifiManager()
val netID = wifiManager?.addNetwork(wifiConfiguration)!!
wifiManager.disconnect()
wifiManager.enableNetwork(netID,true)
wifiManager.reconnect()
if (isWifiConnected(machineID))
callback.onWifiConnected("${wifiManager.dhcpInfo.ipAddress}")
else
callback.onWifiConnected(WifiConstant.WIFI_IP_ADDRESS_INVALID)
}
在我的 isWifiConnected 下面：
private fun isWifiConnected (machineID: String) : Boolean{
if (getWifiManager()?.isWifiEnabled!!) {
val wifiInfo = getWifiManager()?.connectionInfo
if (wifiInfo?.ssid==machineID)
return true
}
return false
}
但是在这部分我总是报错:
wifiManager.disconnect()
wifiManager.enableNetwork(netID,true)
wifiManager.reconnect()
根据文档，它说：
This method was deprecated in API level 29.
a) See WifiNetworkSpecifier.Builder#build() for new mechanism to trigger connection to a Wi-Fi network. b) See addNetworkSuggestions(java.util.List), removeNetworkSuggestions(java.util.List) for new API to add Wi-Fi networks for consideration when auto-connecting to wifi. Compatibility Note: For applications targeting Build.VERSION_CODES.Q or above, this API will always return false.
我正在使用 OS 版本 9 在真实设备中进行测试。但是代码 运行 在模拟器中没问题。请告知可能的原因是什么。感谢您的帮助。
class 已添加到 Api 级别 29，因此如果您在 android Pie 上进行测试，它将无法运行。您需要包装您的代码以检查构建版本并将其仅应用于 android 10+.
这是我的代码：
val wifiManager = applicationContext.getSystemService(WIFI_SERVICE) as WifiManager?
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
try {
val wifiConfig = WifiConfiguration()
wifiConfig.SSID = "\"" + yourSsid + "\""
wifiConfig.preSharedKey = "\"" + password + "\""
val netId = wifiManager!!.addNetwork(wifiConfig)
wifiManager.disconnect()
wifiManager.enableNetwork(netId, true)
wifiManager.reconnect()
if (isWifiConnected("\"" + deviceId + "\"")) {
doSomethingHere()
}
} catch (e: Exception) {
e.printStackTrace()
}
} else {
val wifiNetworkSpecifier = WifiNetworkSpecifier.Builder()
.setSsid( yourSsid!! )
.setWpa2Passphrase(password)
.build()
val networkRequest = NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.setNetworkSpecifier(wifiNetworkSpecifier)
.build()
connectivityManager = Boron.instance.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
networkCallback = object : ConnectivityManager.NetworkCallback() {
override fun onUnavailable() {
super.onUnavailable()
}
override fun onLosing(network: Network, maxMsToLive: Int) {
super.onLosing(network, maxMsToLive)
}
override fun onAvailable(network: Network) {
super.onAvailable(network)
connectivityManager?.bindProcessToNetwork(network)
}
override fun onLost(network: Network) {
super.onLost(network)
}
}
connectivityManager?.requestNetwork(networkRequest,networkCallback)
}
然后在onDestroy
connectivityManager?.unregisterNetworkCallback(networkCallback)
需要权限：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-feature android:name="android.permission.WRITE_SETTINGS"
android:required="false"/>
我正在尝试使用以下代码连接到 wifi
val specifier = WifiNetworkSpecifier.Builder()
.setSsid(machineID).build()
val networkRequest = NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.setNetworkSpecifier(specifier)
.build()
val connectivityManager = context.applicationContext
.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
connectivityManager?.requestNetwork(networkRequest,object:ConnectivityManager.NetworkCallback(){
override fun onUnavailable() {
callback.onWifiConnected(WifiConstant.WIFI_IP_ADDRESS_INVALID)
}
override fun onAvailable(network: Network) {
val wifiInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
if (wifiInfo.isConnected)
callback.onWifiConnected("${getWifiManager()?.connectionInfo?.ipAddress!!}")
else
callback.onWifiConnected(WifiConstant.WIFI_IP_ADDRESS_INVALID)
}
})
但我总是在这一行遇到运行时错误
val specifier = WifiNetworkSpecifier.Builder()
错误如下：
2019-09-25 13:49:00.718 28556-28556/com.aloha.asiaiot E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.aloha.asiaiot, PID: 28556
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/net/wifi/WifiNetworkSpecifier$Builder;
at com.aloha.asiaiot.common.util.wifi.WifiConnectionManager.connectToWifi(WifiConnectionManager.kt:77)
at com.aloha.asiaiot.connectivity.devicescan.data.DeviceScanNetworkRepository.connectToWifi(DeviceScanNetworkRepository.kt:48)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanRepository.connectToWifi(DeviceScanRepository.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanUseCase.connectToWifi(DeviceScanUseCase.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.presentation.viewmodel.DeviceScanViewModel.connectToWifi(DeviceScanViewModel.kt:41)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.connectToGateway(DeviceScanFragment.kt:139)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.access$connectToGateway(DeviceScanFragment.kt:29)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment$onActivityCreated.onClick(DeviceScanFragment.kt:72)
at android.view.View.performClick(View.java:7339)
at android.widget.TextView.performClick(TextView.java:14221)
at android.view.View.performClickInternal(View.java:7305)
at android.view.View.access00(View.java:846)
at android.view.View$PerformClick.run(View.java:27787)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7058)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.net.wifi.WifiNetworkSpecifier$Builder" on path: DexPathList[[zip file "/data/app/com.aloha.asiaiot-k57tcS1ybEKsaCIu13TJnw==/base.apk"],nativeLibraryDirectories=[/data/app/com.aloha.asiaiot-k57tcS1ybEKsaCIu13TJnw==/lib/arm64, /system/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at com.aloha.asiaiot.common.util.wifi.WifiConnectionManager.connectToWifi(WifiConnectionManager.kt:77)
at com.aloha.asiaiot.connectivity.devicescan.data.DeviceScanNetworkRepository.connectToWifi(DeviceScanNetworkRepository.kt:48)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanRepository.connectToWifi(DeviceScanRepository.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.domain.DeviceScanUseCase.connectToWifi(DeviceScanUseCase.kt:18)
at com.aloha.asiaiot.connectivity.devicescan.presentation.viewmodel.DeviceScanViewModel.connectToWifi(DeviceScanViewModel.kt:41)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.connectToGateway(DeviceScanFragment.kt:139)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment.access$connectToGateway(DeviceScanFragment.kt:29)
at com.aloha.asiaiot.connectivity.devicescan.presentation.DeviceScanFragment$onActivityCreated.onClick(DeviceScanFragment.kt:72)
at android.view.View.performClick(View.java:7339)
at android.widget.TextView.performClick(TextView.java:14221)
at android.view.View.performClickInternal(View.java:7305)
at android.view.View.access00(View.java:846)
at android.view.View$PerformClick.run(View.java:27787)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7058)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
2019-09-25 13:49:00.747 28556-28556/com.aloha.asiaiot
我也尝试使用以下代码来解决较低的 SDK 问题：
if (Build.VERSION.SDK_INT< Build.VERSION_CODES.Q) {
val wifiConfiguration = WifiConfiguration()
wifiConfiguration.SSID = String.format("\"%s\"", machineID)
wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)
wifiConfiguration.status = WifiConfiguration.Status.ENABLED
wifiConfiguration.priority = 40
val wifiManager = getWifiManager()
val netID = wifiManager?.addNetwork(wifiConfiguration)!!
wifiManager.disconnect()
wifiManager.enableNetwork(netID,true)
wifiManager.reconnect()
if (isWifiConnected(machineID))
callback.onWifiConnected("${wifiManager.dhcpInfo.ipAddress}")
else
callback.onWifiConnected(WifiConstant.WIFI_IP_ADDRESS_INVALID)
}
在我的 isWifiConnected 下面：
private fun isWifiConnected (machineID: String) : Boolean{
if (getWifiManager()?.isWifiEnabled!!) {
val wifiInfo = getWifiManager()?.connectionInfo
if (wifiInfo?.ssid==machineID)
return true
}
return false
}
但是在这部分我总是报错:
wifiManager.disconnect()
wifiManager.enableNetwork(netID,true)
wifiManager.reconnect()
根据文档，它说：
This method was deprecated in API level 29. a) See WifiNetworkSpecifier.Builder#build() for new mechanism to trigger connection to a Wi-Fi network. b) See addNetworkSuggestions(java.util.List), removeNetworkSuggestions(java.util.List) for new API to add Wi-Fi networks for consideration when auto-connecting to wifi. Compatibility Note: For applications targeting Build.VERSION_CODES.Q or above, this API will always return false.
我正在使用 OS 版本 9 在真实设备中进行测试。但是代码 运行 在模拟器中没问题。请告知可能的原因是什么。感谢您的帮助。
class 已添加到 Api 级别 29，因此如果您在 android Pie 上进行测试，它将无法运行。您需要包装您的代码以检查构建版本并将其仅应用于 android 10+.
这是我的代码：
val wifiManager = applicationContext.getSystemService(WIFI_SERVICE) as WifiManager?
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
try {
val wifiConfig = WifiConfiguration()
wifiConfig.SSID = "\"" + yourSsid + "\""
wifiConfig.preSharedKey = "\"" + password + "\""
val netId = wifiManager!!.addNetwork(wifiConfig)
wifiManager.disconnect()
wifiManager.enableNetwork(netId, true)
wifiManager.reconnect()
if (isWifiConnected("\"" + deviceId + "\"")) {
doSomethingHere()
}
} catch (e: Exception) {
e.printStackTrace()
}
} else {
val wifiNetworkSpecifier = WifiNetworkSpecifier.Builder()
.setSsid( yourSsid!! )
.setWpa2Passphrase(password)
.build()
val networkRequest = NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.setNetworkSpecifier(wifiNetworkSpecifier)
.build()
connectivityManager = Boron.instance.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
networkCallback = object : ConnectivityManager.NetworkCallback() {
override fun onUnavailable() {
super.onUnavailable()
}
override fun onLosing(network: Network, maxMsToLive: Int) {
super.onLosing(network, maxMsToLive)
}
override fun onAvailable(network: Network) {
super.onAvailable(network)
connectivityManager?.bindProcessToNetwork(network)
}
override fun onLost(network: Network) {
super.onLost(network)
}
}
connectivityManager?.requestNetwork(networkRequest,networkCallback)
}
然后在onDestroy connectivityManager?.unregisterNetworkCallback(networkCallback)
需要权限：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-feature android:name="android.permission.WRITE_SETTINGS"
android:required="false"/>