yoonseopshin / CustomSpeedLinearLayoutManager

Created February 4, 2025 14:28

Sample for RecyclerView smooth scroll animation speed and offset.

	class CustomSpeedLinearLayoutManager(
	context: Context,
	private val offsetProvider: (position: Int) -> Int
	) : LinearLayoutManager(context) {

	override fun smoothScrollToPosition(recyclerView: RecyclerView, state: RecyclerView.State, position: Int) {
	val viewHolder = recyclerView.findViewHolderForAdapterPosition(position)?.itemView
	val itemHeight = viewHolder?.height ?: 0

	// just sample value, speed up if viewholder's height is long enough.

yoonseopshin / color-blender-rgba.kt

Last active July 16, 2022 07:27

Color blender(RGBA)

	data class RGBA(var red: Long = 0, var green: Long = 0, var blue: Long = 0, var alpha: Double = 0.0)

	fun main() {
	// rgba-order
	val base = RGBA(124, 77, 255, 0.06)
	val added = RGBA(255, 255, 255, 0.06)

	val mix = RGBA()
	// alpha
	mix.alpha = 1 - (1 - added.alpha) * (1 - base.alpha)

yoonseopshin / README.md

Created July 16, 2022 06:48 — forked from lopspower/README.md

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

yoonseopshin / AndroidRsaCipherHelper.kt

Created March 17, 2022 05:32 — forked from FrancescoJo/AndroidRsaCipherHelper.kt

Android RSA cipher helper with system generated key. No more static final String key in our class - an approach which is very vulnerable to reverse engineering attack.

	import android.os.Build
	import android.security.KeyPairGeneratorSpec
	import android.security.keystore.KeyGenParameterSpec
	import android.security.keystore.KeyProperties
	import android.util.Base64
	import timber.log.Timber
	import java.math.BigInteger
	import java.security.GeneralSecurityException
	import java.security.KeyPairGenerator
	import java.security.KeyStore

yoonseopshin / SecureSharedPreferences.kt

Created March 17, 2022 05:32 — forked from FrancescoJo/SecureSharedPreferences.kt

A SharedPreferences wrapper implementation with encryption/decryption, using CipherHelper implementation.

	import android.content.SharedPreferences

	/**
	* A [android.content.SharedPreferences] wrapper that helps easy reading/writing values.
	*
	* @author Francesco Jo([email protected])
	* @since 22 - Mar - 2018
	*/
	class SecureSharedPreferences(private val sharedPref: SharedPreferences) {
	fun contains(key: String) = sharedPref.contains(key)

yoonseopshin / WorkManagerDataExtension.kt

Created March 15, 2022 12:29

WorkManager serialization extension (Parcelable, Serializable)

	package com.andevapps.ontv.extension

	import android.os.Parcel
	import android.os.Parcelable
	import androidx.work.Data
	import java.io.*

	fun Data.Builder.putParcelable(key: String, parcelable: Parcelable): Data.Builder {
	val parcel = Parcel.obtain()
	try {

yoonseopshin / ItemDecorationWithoutLastItem.kt

Created February 13, 2022 10:10

Add RecyclerView divider without last item

	import android.graphics.Canvas
	import android.graphics.drawable.Drawable
	import androidx.recyclerview.widget.RecyclerView

	class ItemDecorationWithoutLastItem(private val divider: Drawable) : RecyclerView.ItemDecoration() {

	override fun onDrawOver(c: Canvas, parent: RecyclerView, state: RecyclerView.State) {
	super.onDrawOver(c, parent, state)
	val left = parent.paddingLeft
	val right = parent.width - parent.paddingRight

yoonseopshin / FlowExt.kt

Created December 19, 2021 11:54

Lifecycle flow extension

	fun <T> ComponentActivity.collectLatestLifecycleFlow(flow: Flow<T>, collect: suspend (T) -> Unit) {
	lifecycleScope.launch {
	repeatOnLifecycle(Lifecycle.State.STARTED) {
	flow.collectLatest(collect)
	}
	}
	}

yoonseopshin / OnThrottleClickListener.kt

Last active December 19, 2021 10:17

Android throttle click extension implementation (for single click)

	class OnThrottleClickListener(
	private val dispatcher: CoroutineDispatcher,
	private val onClickListener: View.OnClickListener,
	private val interval: Long,
	) : View.OnClickListener {

	private var isClickable = true

	override fun onClick(view: View) {
	if (isClickable) {

yoonseopshin / Preference.kt

Created October 14, 2021 06:32

Preference Usage

	import android.content.SharedPreferences
	import kotlinx.coroutines.Dispatchers
	import kotlinx.coroutines.GlobalScope
	import kotlinx.coroutines.InternalCoroutinesApi
	import kotlinx.coroutines.channels.Channel
	import kotlinx.coroutines.flow.Flow
	import kotlinx.coroutines.flow.FlowCollector
	import kotlinx.coroutines.launch
	import kotlinx.coroutines.withContext
	import kotlin.properties.ReadWriteProperty

Yoonseop Shin yoonseopshin

Hexadecimal color code for transparency

How to set transparency with hex value ?

Download This sample on Google Play Store