Any way to run shell commands on android programmatically?

For Kotlin enthusiasts, you can use the following

fun executeShell() {
    val command: String = "top -n 1"
    try {
        val process: Process = Runtime.getRuntime().exec(command)
        // Read the lines using BufferedReader
        BufferedReader(InputStreamReader(process.inputStream)).forEachLine {
            // Do something on each line read
            Log.d(this::class.java.canonicalName, "$it")
        }
    } catch (e: InterruptedException) {
        Log.w(this::class.java.canonicalName, "Cannot execute command [$command].", e)
    } catch (e: Exception) {
        Log.e(this::class.java.canonicalName, "Cannot execute command [$command].", e)
    }
}

You won't even have to take care of closing the buffer, as forEachLine extension function takes care of it.