amitshekhariitbhu · mohityadav7 · Jun 11, 2025
diff --git a/app/build.gradle b/app/build.gradle
@@ -1,17 +1,16 @@
 plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
-    id 'kotlin-android-extensions'
-    id 'kotlin-kapt'
+    id 'com.google.devtools.ksp'
 }
 
 android {
-    compileSdk 33
+    compileSdk 36
 
     defaultConfig {
         applicationId "me.amitshekhar.learn.kotlin.flow"
-        minSdk 21
-        targetSdk 33
+        minSdk 26
+        targetSdk 36
         versionCode 1
         versionName "1.0"
 
@@ -31,31 +30,36 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    android {
+        buildFeatures {
+            viewBinding true
+        }
+    }
+    namespace "me.amitshekhar.learn.kotlin.flow"
 }
 
 dependencies {
 
-    implementation 'androidx.core:core-ktx:1.9.0'
-    implementation 'androidx.appcompat:appcompat:1.5.1'
-    implementation 'com.google.android.material:material:1.6.1'
-    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
-    implementation "androidx.recyclerview:recyclerview:1.2.1"
+    implementation 'androidx.core:core-ktx:1.16.0'
+    implementation 'androidx.appcompat:appcompat:1.7.1'
+    implementation 'com.google.android.material:material:1.12.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.2.1'
+    implementation "androidx.recyclerview:recyclerview:1.4.0"
     implementation 'com.github.bumptech.glide:glide:4.11.0'
     implementation 'com.squareup.retrofit2:retrofit:2.9.0'
     implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1'
-    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.5.1'
-    implementation "androidx.room:room-runtime:2.4.3"
-    kapt "androidx.room:room-compiler:2.4.3"
-    implementation "androidx.room:room-ktx:2.4.3"
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.9.1'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.9.1'
+    implementation "androidx.room:room-runtime:2.7.1"
+    ksp "androidx.room:room-compiler:2.7.1"
+    implementation "androidx.room:room-ktx:2.7.1"
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation "org.mockito:mockito-core:3.4.6"
-    testImplementation 'androidx.arch.core:core-testing:2.1.0'
-    testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.1'
+    testImplementation 'androidx.arch.core:core-testing:2.2.0'
+    testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.4'
     testImplementation 'app.cash.turbine:turbine:0.11.0'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
-
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
 }
diff --git a/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/base/ApiUserAdapter.kt b/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/base/ApiUserAdapter.kt
@@ -1,35 +1,30 @@
 package me.amitshekhar.learn.kotlin.flow.ui.base
 
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import com.bumptech.glide.Glide
-import kotlinx.android.synthetic.main.item_layout.view.*
-import me.amitshekhar.learn.kotlin.flow.R
 import me.amitshekhar.learn.kotlin.flow.data.model.ApiUser
+import me.amitshekhar.learn.kotlin.flow.databinding.ItemLayoutBinding
 
 class ApiUserAdapter(
     private val users: ArrayList<ApiUser>
 ) : RecyclerView.Adapter<ApiUserAdapter.DataViewHolder>() {
 
-    class DataViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+    class DataViewHolder(private val binding: ItemLayoutBinding) : RecyclerView.ViewHolder(binding.root) {
         fun bind(user: ApiUser) {
-            itemView.textViewUserName.text = user.name
-            itemView.textViewUserEmail.text = user.email
-            Glide.with(itemView.imageViewAvatar.context)
+            binding.textViewUserName.text = user.name
+            binding.textViewUserEmail.text = user.email
+            Glide.with(binding.imageViewAvatar.context)
                 .load(user.avatar)
-                .into(itemView.imageViewAvatar)
+                .into(binding.imageViewAvatar)
         }
     }
 
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
-        DataViewHolder(
-            LayoutInflater.from(parent.context).inflate(
-                R.layout.item_layout, parent,
-                false
-            )
-        )
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DataViewHolder {
+        val binding = ItemLayoutBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+        return DataViewHolder(binding)
+    }
 
     override fun getItemCount(): Int = users.size
 

diff --git a/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/base/UserAdapter.kt b/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/base/UserAdapter.kt
@@ -1,35 +1,30 @@
 package me.amitshekhar.learn.kotlin.flow.ui.base
 
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import com.bumptech.glide.Glide
-import kotlinx.android.synthetic.main.item_layout.view.*
-import me.amitshekhar.learn.kotlin.flow.R
 import me.amitshekhar.learn.kotlin.flow.data.local.entity.User
+import me.amitshekhar.learn.kotlin.flow.databinding.ItemLayoutBinding
 
 class UserAdapter(
     private val users: ArrayList<User>
 ) : RecyclerView.Adapter<UserAdapter.DataViewHolder>() {
 
-    class DataViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+    class DataViewHolder(private val binding: ItemLayoutBinding) : RecyclerView.ViewHolder(binding.root) {
         fun bind(user: User) {
-            itemView.textViewUserName.text = user.name
-            itemView.textViewUserEmail.text = user.email
-            Glide.with(itemView.imageViewAvatar.context)
+            binding.textViewUserName.text = user.name
+            binding.textViewUserEmail.text = user.email
+            Glide.with(binding.imageViewAvatar.context)
                 .load(user.avatar)
-                .into(itemView.imageViewAvatar)
+                .into(binding.imageViewAvatar)
         }
     }
 
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
-        DataViewHolder(
-            LayoutInflater.from(parent.context).inflate(
-                R.layout.item_layout, parent,
-                false
-            )
-        )
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DataViewHolder {
+        val binding = ItemLayoutBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+        return DataViewHolder(binding)
+    }
 
     override fun getItemCount(): Int = users.size
 

diff --git a/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/completion/CompletionActivity.kt b/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/completion/CompletionActivity.kt
@@ -8,26 +8,25 @@ import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
-import kotlinx.android.synthetic.main.activity_long_running_task.*
-import kotlinx.android.synthetic.main.activity_recycler_view.progressBar
 import kotlinx.coroutines.launch
 import me.amitshekhar.learn.kotlin.flow.R
 import me.amitshekhar.learn.kotlin.flow.data.api.ApiHelperImpl
 import me.amitshekhar.learn.kotlin.flow.data.api.RetrofitBuilder
 import me.amitshekhar.learn.kotlin.flow.data.local.DatabaseBuilder
 import me.amitshekhar.learn.kotlin.flow.data.local.DatabaseHelperImpl
-import me.amitshekhar.learn.kotlin.flow.ui.base.ApiUserAdapter
+import me.amitshekhar.learn.kotlin.flow.databinding.ActivityCompletionBinding
 import me.amitshekhar.learn.kotlin.flow.utils.DefaultDispatcherProvider
 import me.amitshekhar.learn.kotlin.flow.ui.base.UiState
 import me.amitshekhar.learn.kotlin.flow.ui.base.ViewModelFactory
 
 class CompletionActivity : AppCompatActivity() {
 
     private lateinit var viewModel: CompletionViewModel
-    private lateinit var adapter: ApiUserAdapter
+    private lateinit var binding: ActivityCompletionBinding
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        binding = ActivityCompletionBinding.inflate(layoutInflater)
         setContentView(R.layout.activity_completion)
         setupViewModel()
         setupObserver()
@@ -39,17 +38,17 @@ class CompletionActivity : AppCompatActivity() {
                 viewModel.uiState.collect {
                     when (it) {
                         is UiState.Success -> {
-                            progressBar.visibility = View.GONE
-                            textView.text = it.data
-                            textView.visibility = View.VISIBLE
+                            binding.progressBar.visibility = View.GONE
+                            binding.textView.text = it.data
+                            binding.textView.visibility = View.VISIBLE
                         }
                         is UiState.Loading -> {
-                            progressBar.visibility = View.VISIBLE
-                            textView.visibility = View.GONE
+                            binding.progressBar.visibility = View.VISIBLE
+                            binding.textView.visibility = View.GONE
                         }
                         is UiState.Error -> {
                             //Handle Error
-                            progressBar.visibility = View.GONE
+                            binding.progressBar.visibility = View.GONE
                             Toast.makeText(this@CompletionActivity, it.message, Toast.LENGTH_SHORT)
                                 .show()
                         }

diff --git a/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/errorhandling/catch/CatchActivity.kt b/app/src/main/java/me/amitshekhar/learn/kotlin/flow/ui/errorhandling/catch/CatchActivity.kt
@@ -1,5 +1,6 @@
 package me.amitshekhar.learn.kotlin.flow.ui.errorhandling.catch
 
+import android.annotation.SuppressLint
 import android.os.Bundle
 import android.view.View
 import android.widget.Toast
@@ -10,14 +11,14 @@ import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
-import kotlinx.android.synthetic.main.activity_recycler_view.*
 import kotlinx.coroutines.launch
 import me.amitshekhar.learn.kotlin.flow.R
 import me.amitshekhar.learn.kotlin.flow.data.api.ApiHelperImpl
 import me.amitshekhar.learn.kotlin.flow.data.api.RetrofitBuilder
 import me.amitshekhar.learn.kotlin.flow.data.local.DatabaseBuilder
 import me.amitshekhar.learn.kotlin.flow.data.local.DatabaseHelperImpl
 import me.amitshekhar.learn.kotlin.flow.data.model.ApiUser
+import me.amitshekhar.learn.kotlin.flow.databinding.ActivityRecyclerViewBinding
 import me.amitshekhar.learn.kotlin.flow.ui.base.ApiUserAdapter
 import me.amitshekhar.learn.kotlin.flow.utils.DefaultDispatcherProvider
 import me.amitshekhar.learn.kotlin.flow.ui.base.UiState
@@ -27,28 +28,30 @@ class CatchActivity : AppCompatActivity() {
 
     private lateinit var viewModel: CatchViewModel
     private lateinit var adapter: ApiUserAdapter
+    private lateinit var binding: ActivityRecyclerViewBinding
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        binding = ActivityRecyclerViewBinding.inflate(layoutInflater)
         setContentView(R.layout.activity_recycler_view)
         setupUI()
         setupViewModel()
         setupObserver()
     }
 
     private fun setupUI() {
-        recyclerView.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
         adapter =
             ApiUserAdapter(
                 arrayListOf()
             )
-        recyclerView.addItemDecoration(
+        binding.recyclerView.addItemDecoration(
             DividerItemDecoration(
-                recyclerView.context,
-                (recyclerView.layoutManager as LinearLayoutManager).orientation
+                binding.recyclerView.context,
+                (binding.recyclerView.layoutManager as LinearLayoutManager).orientation
             )
         )
-        recyclerView.adapter = adapter
+        binding.recyclerView.adapter = adapter
     }
 
     private fun setupObserver() {
@@ -57,17 +60,17 @@ class CatchActivity : AppCompatActivity() {
                 viewModel.uiState.collect {
                     when (it) {
                         is UiState.Success -> {
-                            progressBar.visibility = View.GONE
+                            binding.progressBar.visibility = View.GONE
                             renderList(it.data)
-                            recyclerView.visibility = View.VISIBLE
+                            binding.recyclerView.visibility = View.VISIBLE
                         }
                         is UiState.Loading -> {
-                            progressBar.visibility = View.VISIBLE
-                            recyclerView.visibility = View.GONE
+                            binding.progressBar.visibility = View.VISIBLE
+                            binding.recyclerView.visibility = View.GONE
                         }
                         is UiState.Error -> {
                             //Handle Error
-                            progressBar.visibility = View.GONE
+                            binding.progressBar.visibility = View.GONE
                             Toast.makeText(this@CatchActivity, it.message, Toast.LENGTH_SHORT)
                                 .show()
                         }
@@ -77,6 +80,7 @@ class CatchActivity : AppCompatActivity() {
         }
     }
 
+    @SuppressLint("NotifyDataSetChanged")
     private fun renderList(users: List<ApiUser>) {
         adapter.addData(users)
         adapter.notifyDataSetChanged()

diff --git a/...rc/main/java/me/amitshekhar/learn/kotlin/flow/ui/errorhandling/emitall/EmitAllActivity.kt b/...rc/main/java/me/amitshekhar/learn/kotlin/flow/ui/errorhandling/emitall/EmitAllActivity.kt
@@ -1,5 +1,6 @@
 package me.amitshekhar.learn.kotlin.flow.ui.errorhandling.emitall
 
+import android.annotation.SuppressLint
 import android.os.Bundle
 import android.view.View
 import android.widget.Toast
@@ -10,14 +11,14 @@ import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
-import kotlinx.android.synthetic.main.activity_recycler_view.*
 import kotlinx.coroutines.launch
 import me.amitshekhar.learn.kotlin.flow.R
 import me.amitshekhar.learn.kotlin.flow.data.api.ApiHelperImpl
 import me.amitshekhar.learn.kotlin.flow.data.api.RetrofitBuilder
 import me.amitshekhar.learn.kotlin.flow.data.local.DatabaseBuilder
 import me.amitshekhar.learn.kotlin.flow.data.local.DatabaseHelperImpl
 import me.amitshekhar.learn.kotlin.flow.data.model.ApiUser
+import me.amitshekhar.learn.kotlin.flow.databinding.ActivityRecyclerViewBinding
 import me.amitshekhar.learn.kotlin.flow.ui.base.ApiUserAdapter
 import me.amitshekhar.learn.kotlin.flow.utils.DefaultDispatcherProvider
 import me.amitshekhar.learn.kotlin.flow.ui.base.UiState
@@ -27,27 +28,29 @@ class EmitAllActivity : AppCompatActivity() {
 
     private lateinit var viewModel: EmitAllViewModel
     private lateinit var adapter: ApiUserAdapter
+    private lateinit var binding: ActivityRecyclerViewBinding
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        binding = ActivityRecyclerViewBinding.inflate(layoutInflater)
         setContentView(R.layout.activity_recycler_view)
         setupUI()
         setupViewModel()
         setupObserver()
     }
 
     private fun setupUI() {
-        recyclerView.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
         adapter = ApiUserAdapter(
             arrayListOf()
         )
-        recyclerView.addItemDecoration(
+        binding.recyclerView.addItemDecoration(
             DividerItemDecoration(
-                recyclerView.context,
-                (recyclerView.layoutManager as LinearLayoutManager).orientation
+                binding.recyclerView.context,
+                (binding.recyclerView.layoutManager as LinearLayoutManager).orientation
             )
         )
-        recyclerView.adapter = adapter
+        binding.recyclerView.adapter = adapter
     }
 
     private fun setupObserver() {
@@ -56,17 +59,17 @@ class EmitAllActivity : AppCompatActivity() {
                 viewModel.uiState.collect {
                     when (it) {
                         is UiState.Success -> {
-                            progressBar.visibility = View.GONE
+                            binding.progressBar.visibility = View.GONE
                             renderList(it.data)
-                            recyclerView.visibility = View.VISIBLE
+                            binding.recyclerView.visibility = View.VISIBLE
                         }
                         is UiState.Loading -> {
-                            progressBar.visibility = View.VISIBLE
-                            recyclerView.visibility = View.GONE
+                            binding.progressBar.visibility = View.VISIBLE
+                            binding.recyclerView.visibility = View.GONE
                         }
                         is UiState.Error -> {
                             //Handle Error
-                            progressBar.visibility = View.GONE
+                            binding.progressBar.visibility = View.GONE
                             Toast.makeText(this@EmitAllActivity, it.message, Toast.LENGTH_SHORT)
                                 .show()
                         }
@@ -76,6 +79,7 @@ class EmitAllActivity : AppCompatActivity() {
         }
     }
 
+    @SuppressLint("NotifyDataSetChanged")
     private fun renderList(users: List<ApiUser>) {
         adapter.addData(users)
         adapter.notifyDataSetChanged()