gab-stargazer

The Problem in Compose

If you ever use Jetpack Compose, you will probably know how hard it is to use snackbar. Because in Compose, Snackbar require a Host, and a State. Unlike in Android XML, we can just refer any UI part as a snackbar Host, but in Compose, we require specific Component for it so called SnackbarHost which usually placed in a Scaffold Snackbar Slot.

The Solution

In order to solve this problem, we need a way where we can provide Snackbar Host into the Child composable without the need to pass it as a parameter in composable function. Therefore, we're gonna utilize Compose feature, which is Composition Local Provider that was able to provide specific stuff into it's composable Tree, and we're gonna make a custom class to manage this Queue System utilizing Java LinkedList and a Mutex in order to prevent value loss due to concurrency.

The Snackbar Manager

A custom class is required for this in order to make a queue system. Use the code below to achieve the behavior.

gab-stargazer

import android.annotation.SuppressLint
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import androidx.viewbinding.ViewBinding

class DynamicAdapter<T : Any, VB : ViewBinding>(
    private val inflate: (LayoutInflater, ViewGroup, Boolean) -> VB,

gab-stargazer

@Composable
inline fun <reified T> Flow<T>.CollectInLaunchEffect(
    key: Any,
    noinline block: suspend (T) -> Unit
) {
    val lifeCycle = LocalLifecycleOwner.current.lifecycle
    LaunchedEffect(key1 = key) {
        lifeCycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
            this@CollectInLaunchEffect.collectLatest(block)
        }

gab-stargazer

fun main(args: Array<String>) {
    println("Basic Calculator")

    val firstNumber: Number?
    val secondNumber: Number?
    val operation: String?

    while (true) {
        print("Input first Number: ")
        val input = readln()

gab-stargazer

private fun parseHttpError(t: HttpException): String {
        val body = t.response()?.errorBody()
        val gson = Gson()
        val adapter: TypeAdapter<ErrorResponse> = gson.getAdapter(ErrorResponse::class.java)
        return try {
            val error = adapter.fromJson(body?.string())
            "Error ${error.status}: ${error.message}"
        } catch (e: Exception) {
            "Response failed to parse"
        }