igorskh / kt_ping

Ping demo for Android written in Kotlin with configurable size and interval

Ping for Android in Kotlin

Description

This is a demonstration of an ICMP ping application for Android with configurable size and interval. The application executes a system ping process with defined paramteres and uses a simple regex to parse values. Some very basic exceptions handling is implemented.

The figure below shows a screenshot of a simulated run.

Implementation details

The main application logic is located in MainActivity.kt.

Class class PingProcess : Runnable contains a ping thread, it reads parameters from the inputs and forms a string array cmd

val serverAddr = textServer.text.toString()
val size = textSize.text.toString()
val interval = textInterval.text.toString()

val cmd = mutableListOf("ping", "-D")
if (size != "") {
    cmd.addAll(arrayOf("-s", size))
}
if (interval != "") {
    cmd.addAll(arrayOf("-i", interval))
}
cmd.add(serverAddr)

Then, we create a process and initialize buffer reader

val process = Runtime.getRuntime().exec(cmd.toTypedArray())
val stdInput = BufferedReader(InputStreamReader(process.inputStream))

Considering that ping runs indefinetely, we are continiously reading process output until we stop it and send it to the main thread to update the UI

for (l in stdInput.lines()) {
    if (!isThreadRunning) {
        break
    }
    lastPingString = l

    val messagePing = Message()
    messagePing.what = PING
    mHandlerThread.sendMessage(messagePing)
}

Authorship and license

Igor Kim

The repository is distributed under MIT license.