private val ACTION_INSTALL_COMPLETE = "com.example.myapplication.INSTALL_COMPLETE"

    @Throws(IOException::class)
    fun installPackage(context: Context, inputStream: InputStream) {
        val packageInstaller = context.packageManager.packageInstaller
        packageInstaller.registerSessionCallback(object : PackageInstaller.SessionCallback() {
            override fun onProgressChanged(sessionId: Int, progress: Float) {
                Log.d("installPackage", "onProgressChanged, progress: $progress")
            }

            override fun onActiveChanged(sessionId: Int, active: Boolean) {
                Log.d("installPackage", "onActiveChanged, active: $active")
            }

            override fun onFinished(sessionId: Int, success: Boolean) {
                Log.d("installPackage", "onFinished")
            }

            override fun onBadgingChanged(sessionId: Int) {
                Log.d("installPackage", "onBadgingChanged")
            }

            override fun onCreated(sessionId: Int) {
                Log.d("installPackage", "onCreated")
            }

        })
        val sessionId = packageInstaller.createSession(SessionParams(SessionParams.MODE_FULL_INSTALL))
        val session = packageInstaller.openSession(sessionId)
        val sizeBytes: Long = 0
        var out: OutputStream? = null
        out = session.openWrite("my_app_session", 0, sizeBytes)
        var total = 0
        val buffer = ByteArray(65536)
        var c: Int
        while (inputStream.read(buffer).also { c = it } != -1) {
            total += c
            out.write(buffer, 0, c)
        }
        session.fsync(out)
        inputStream.close()
        out.close()

        session.commit(createIntentSender(this, sessionId))
        session.close()
    }

    private fun createIntentSender(context: Context, sessionId: Int): IntentSender {
        val pendingIntent = PendingIntent.getBroadcast(
                context,
                sessionId,
                Intent(ACTION_INSTALL_COMPLETE),
                0)
        return pendingIntent.intentSender
    }

class Receiver : BroadcastReceiver() {
        override fun onReceive(context: Context?, intent: Intent?) {
            Log.d("onReceive", "$intent, context: $context")
        }
}