Currently, while you can use your computer’s Internet connection in the emulator, it’s not reliable to use it for simulating Wi-Fi. The WifiManager gets confused when you switch/want to test your connectivity state. Even in Android 1.5, there were some problems with it (Issue 2571 – android), and while you can use your Internet for … Read more
String ip; try { Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); while (interfaces.hasMoreElements()) { NetworkInterface iface = interfaces.nextElement(); // filters out 127.0.0.1 and inactive interfaces if (iface.isLoopback() || !iface.isUp()) continue; Enumeration<InetAddress> addresses = iface.getInetAddresses(); while(addresses.hasMoreElements()) { InetAddress addr = addresses.nextElement(); ip = addr.getHostAddress(); System.out.println(iface.getDisplayName() + ” ” + ip); } } } catch (SocketException e) { throw new … Read more
You can solve this by setting captive_portal_detection_enabled to 0 (false). What’s actually happening is that by default, everytime you connect to a wifi, the FW will test against a server (typically google) to see if it’s a captive wifi (needs login). So if your wifi is not connected to google, this check will fail. After … Read more
The Short Answer At least one app is repeatedly querying WiFi for signal strength, and it’s chewing up a lot of battery life. The Longer Answer 1. What is RSSI RSSI stands for Received Signal Strength Indication. It is a measure of the power present in a wireless signal. RSSI queries are made each time … Read more
Please refer to Android 6.0 Changes. To provide users with greater data protection, starting in this release, Android removes programmatic access to the device’s local hardware identifier for apps using the Wi-Fi and Bluetooth APIs. The WifiInfo.getMacAddress() and the BluetoothAdapter.getAddress() methods now return a constant value of 02:00:00:00:00:00. To access the hardware identifiers of nearby … Read more
Using the code that Apple has provided here Reachability *reachability = [Reachability reachabilityForInternetConnection]; [reachability startNotifier]; NetworkStatus status = [reachability currentReachabilityStatus]; if(status == NotReachable) { //No internet } else if (status == ReachableViaWiFi) { //WiFi } else if (status == ReachableViaWWAN) { //3G }
A connect failed: ECONNREFUSED (Connection refused) most likely means that there is nothing listening on that port AND that IP address. Possible explanations include: the service has crashed or hasn’t been (successfully!) started, your client is trying to connect using the wrong IP address or port, your client is trying to connect using a DNS … Read more
First, run ‘adb connect ip:port’, like adb connect <phone-ip-address>, from console/terminal (with your IP address and port of cause). This makes adb service to connect to your device via network. Port 5555 is used by default if no port number is specified. Then check that device is correctly connected: run adb devices from console/terminal (make … Read more
Starting with Android 4.4 you can print documents from a device to a hardware printer via wifi. Android apps can now print any type of content over Wi-Fi or cloud-hosted services such as Google Cloud Print. In print-enabled apps, users can discover available printers, change paper sizes, choose specific pages to print, and print almost … Read more
To be able to control wireless drivers from userspace, some IPC communication processes between kernel and userspace are used. At first ioctl with vendor dependent APIs was used. In 1996, Jean Tourrilhes creates wireless extensions (WE or WEXT). The Wireless Extension (WE) is a generic API allowing a driver to expose to the user space … Read more