Android Network Tools 
Disappointed by the lack of good network apis in android / java I developed a collection of handy networking tools for everyday android development.
- Port Scanning
- Subnet Device Finder (discovers devices on local network)
- Ping
- Wake-On-Lan
- & More :)
General info
Sample app
The sample app is published on Google play to allow you to quickly and easier test the library. Enjoy! And please do feedback to us if your tests produce different results.
Usage
Add as dependency
This library is not yet released in Maven Central, until then you can add as a library module or use JitPack.io
add remote maven url
repositories {
maven {
url "https://jitpack.io"
}
}
then add a library dependency. Remember to check for latest release here
dependencies {
compile 'com.github.stealthcopter:AndroidNetworkTools:0.3.0'
}
Add permission
Requires internet permission (obviously...)
<uses-permission android:name="android.permission.INTERNET" />Port Scanning
A simple java based TCP port scanner, fast and easy to use. By default it will try and guess the best timeout and threads to use while scanning depending on if the address looks like localhost, local network or remote. You can override these yourself by calling setNoThreads() and setTimeoutMillis()
// Synchronously
ArrayList<Integer> openPorts = PortScan.onAddress("192.168.0.1").setPort(21).doScan();
// Asynchronously
PortScan.onAddress("192.168.0.1").setTimeOutMillis(1000).setPortsAll().doScan(new PortScan.PortListener() {
@Override
public void onResult(int portNo, boolean open) {
if (open) // Stub: found open port
}
@Override
public void onFinished(ArrayList<Integer> openPorts) {
// Stub: Finished scanning
}
}
);
Subnet Devices
Finds devices that respond to ping that are on the same subnet as the current device. You can set the timeout for the ping with setTimeOutMillis() [default 2500] and the number of threads with setNoThreads() [default 255]
// Asynchronously
SubnetDevices.fromLocalAddress().findDevices(new SubnetDevices.OnSubnetDeviceFound() {
@Override
public void onDeviceFound(Device device) {
// Stub: Found subnet device
}
@Override
public void onFinished(ArrayList<Device> devicesFound) {
// Stub: Finished scanning
}
}
);
Ping
Uses the native ping binary if available on the device (some devices come without it) and falls back to a TCP request on port 7 (echo request) if not.
// Synchronously
PingResult pingResult = Ping.onAddress("192.168.0.1").setTimeOutMillis(1000).doPing();
// Asynchronously
Ping.onAddress("192.168.0.1").setTimeOutMillis(1000).setTimes(5).doPing(new Ping.PingListener() {
@Override
public void onResult(PingResult pingResult) {
...
}
}
);
Note: If we do have to fall back to using TCP port 7 (the java way) to detect devices we will find significantly less than with the native ping binary. If this is an issue you could consider adding a ping binary to your application or device so that it is always available.
Note: If you want a more advanced portscanner you should consider compiling nmap into your project and using that instead.
Wake-On-Lan
Sends a Wake-on-Lan packet to the IP / MAC address
String ipAddress = "192.168.0.1";
String macAddress = "01:23:45:67:89:ab";
WakeOnLan.sendWakeOnLan(ipAddress, macAddress);
Misc
Other useful methods:
String ipAddress = "192.168.0.1";
String macAddress = ARPInfo.getMacFromArpCache(ipAddress);
Building
It's a standard gradle project.
Contributing
I welcome pull requests, issues and feedback.
- Fork it
- Create your feature branch (git checkout -b my-new-feature)
- Commit your changes (git commit -am 'Added some feature')
- Push to the branch (git push origin my-new-feature)
- Create new Pull Request