I am struggling to understand how to use dagger dependency injection , in a kotlin architectural component based app. Even after going through many blog posts, docs , I still dont clearly understand field injection, dagger-android . Can anyone suggest any course or material which might help me to get a better understanding of dagger so that I can move fast with my development.

@jw can you convert the above discussion in a blog post?...for reference.

nothing special, I need simple logger consistent with kotlin syntax

Give

Timber

a try

Would like to hear some feedback from you.

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What’s the best way to implement matching strings with typos in Android? Is there a native implementation or 3rd part library?

There are soundex libraries for android, but I'm not aware of anything kotlin specific

I've upgraded to recently released navigation component alpha05 and this error popped up:

Unresolved reference. None of the following candidates is applicable because of receiver type mismatch:
public fun `Activity;`.findNavController(viewId: Int): `NavController;` defined in androidx.navigation
public fun `View;`.findNavController(): `NavController;` defined in androidx.navigation

This means my previously working code doesn't compile anymore on this stuff:

view.setOnClickListener {
    it.findNavController().navigate(somewhere)
}

cause it cant resolve

findNavController()

extension function. I think it's a collision? Checked the source code

package androidx.navigation

import android.view.View
/**
 * Find a [NavController] associated with a [View].
 *
 * Calling this on a View not within a [NavHost] will result in an
 * [IllegalStateException]
 */
fun View.findNavController(): NavController =
        Navigation.findNavController(this)

and

package androidx.navigation
import android.app.Activity
import android.support.annotation.IdRes
/**
 * Find a [NavController] given the id of a View and its containing
 * [Activity].
 *
 * Calling this on a View that is not a [NavHost] or within a [NavHost]
 * will result in an [IllegalStateException]
 */
fun Activity.findNavController(@IdRes viewId: Int): NavController =
        Navigation.findNavController(this, viewId)

these two collide I think and when you

import androidx.navigation.findNavController

it doesn't know which one to import?

quick dumb question please> is there an Android equivalent of ios “page control” please? you know those dots at the bottom of the screen, typically in onboarding, etc.

Exactly, you should worry about design, not about one empty class. Otherwise you should stop using any Lists and especially Maps It is not “a huge overhead” it no practical overhead at all. On your app initialisation even before any UI you create hundreds and thousands classes with state (not just empty, like in you case). Overhead is so small that no reason to worry about it in such case. Spend your time to solve real problems and do real optimisation rather than worry about one global object

Hey What is the best way to deal with button clicks debouncing and Kotlin Android Extensions? Is there any simple way to debounce clicks for whole app?

Did we remember to praise LeakCanary today? https://github.com/square/leakcanary

hey guys, do background limits apply to location in periodic job scheduler, right? docs says it gives me fresh location in background only few times an hours can someone confirm this?

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only one

@louiscad always advocates his "splitties". I find them way cleaner than anko

What does flutter do different that they always wave their 60fps claim?

Anyone using room database in kotlin? How do you clear all tables ?

@Kulwinder Singh i implemented that but getting

java.lang.IllegalStateException: Cannot perform this operation because there is no current transaction.

It run for the first time then crash for second time

fun clearAndResetAllTables(): Boolean {
        if (db== null) return false

        // reset all auto-incrementalValues
        val query = SimpleSQLiteQuery("DELETE FROM sqlite_sequence")

        db!!.beginTransaction()
        return try {
            db!!.clearAllTables()
            db!!.query(query)
            db!!.setTransactionSuccessful()
            true
        } catch (e: Exception){
            false
        } finally {
            db!!.endTransaction()
        }
    }

Anyone here with a good resource to learning clean architecture?

Hi to all, i’m writing library from RecyclerView. Today i released new version. Please, look at this and note, what we think about it. Thanks! https://github.com/mentalstack/recyclerview-extensions

For a template app that has a bunch of product flavors (talking 20+ and increasing), is there a different / more efficient way to manage product flavors instead of having blocks of code for each in the gradle file ?

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private val imageResource: Int? by lazy { arguments?.getInt(ARG) }
//Doesn't work compiler complain it is not integer
imageResource?.let { ivIcon.setImageResource(it) }
//Works
imageResource?.run { ivIcon.setImageResource(this) }

is there a way to use the `@DrawableRes`with delegates? or do I have to lose the perk of using

setImageResource

? Edit: It works with

run

what am I missing here?

Hello, I have a real problem. I have previously used MediatorLiveData to combine results from FCM, Room and Networking in my Repository. It worked well. However, now I want more complexity and some additional bonuses from RxJava. This is why I have decided to use RxJava this time. I can combine Room and Networking with Observable.concatArrayEager(my _observables) or merge them all, but then I can't get the latest one, which in this case what I want. However, I don't now how to do that after FCM pushes value, and how should I notify my main observable after new changes occur? No examples on this issue whatsoever. It is crucial part. I receive FCM in my BroadCastReceiver and then notified my repository's livedata, which notified my MediatorLiveData... How to do that with RxJava? Would really welcome any advice, because it is really important issue.

Hi, how do you deal with

Mockito.any(T::class.java)

return null in Kotlin?

Hi any article or guide to use coroutine with Room database and retrofit with repository pattern?