Homework / recyclerView

app/build.gradle

@@ -4,12 +4,12 @@ plugins {
 }
 
 android {
-    compileSdk 32
+    compileSdk 33
 
     defaultConfig {
         applicationId "otus.gpb.recyclerview"
         minSdk 23
-        targetSdk 32
+        targetSdk 33
         versionCode 1
         versionName "1.0"
 
@@ -29,6 +29,9 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 dependencies {
@@ -37,7 +40,6 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.google.android.material:material:1.7.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
-    testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+
+    implementation deps.recyclerview
 }

app/src/main/AndroidManifest.xml

@@ -22,6 +22,9 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <meta-data
+            android:name="preloaded_fonts"
+            android:resource="@array/preloaded_fonts" />
     </application>
 
 </manifest>

app/src/main/java/otus/gpb/recyclerview/ChatItem.kt

@@ -0,0 +1,18 @@
+package otus.gpb.recyclerview
+
+data class ChatItem(
+    val id: Int,
+    val userName: String,
+    val lastMessage: String,
+    val date: String,
+    val avatar: String? = null,
+    val isMuted: Boolean = false,
+    val isVerified: Boolean = false,
+    val isScam: Boolean = false,
+    val isLastMessageMine: Boolean = false,
+    val isMessageDelivered: Boolean = false,
+    val isMessageRead:Boolean = false,
+    val unreadMessageCount: Int = 0
+) {
+    var onClickListener: ((item: ChatItem) -> Unit)? = null
+}

app/src/main/java/otus/gpb/recyclerview/MainActivity.kt

@@ -1,12 +1,108 @@
 package otus.gpb.recyclerview
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.PagerSnapHelper
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.snackbar.Snackbar
+import otus.gpb.recyclerview.adapter.ChatListAdapter
+import otus.gpb.recyclerview.adapter.OnInteractionListener
+import otus.gpb.recyclerview.adapter.Stubs
+import otus.gpb.recyclerview.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
 
+    private lateinit var binding: ActivityMainBinding
+
+    private val chatAdapter: ChatListAdapter by lazy {
+        ChatListAdapter(object : OnInteractionListener {
+            override fun onBindingClick(item: ChatItem, itemPosition: Int) {
+                chatAdapter.addItem(item.copy(id = ++Stubs.id))
+            }
+        })
+    }
+    private lateinit var touchHelperCallBack: ItemTouchHelper.Callback
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        //due to onStart calls many times, and onCreate calls once,
+        // all entities that required to be instantiated ONCE go to onCreate
+
+        val listToSubmit = Stubs.stubItems.onEach { item ->
+            item.onClickListener = {
+                Toast.makeText(
+                    this,
+                    getString(R.string.last_message, item.userName, item.lastMessage),
+                    Toast.LENGTH_SHORT
+                ).show()
+            }
+        }
+
+        val layoutManager = LinearLayoutManager(binding.recyclerView.context)
+        binding.recyclerView.apply {
+            this.layoutManager = layoutManager
+            adapter = chatAdapter
+            addItemDecoration(MyDecoration(this.context))
+
+            addOnScrollListener(MyPageScrollListener(layoutManager).apply {
+                setOnLoadMoreListener {
+                    chatAdapter.addItems(listToSubmit)
+
+                    Toast.makeText(
+                        this@MainActivity,
+                        "Items count now is ${chatAdapter.itemCount}",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
+            }
+            )
+        }
+        chatAdapter.submitList(listToSubmit)
+
+        touchHelperCallBack = getTouchHelperCallback()
+        val itemTouchHelper = ItemTouchHelper(touchHelperCallBack)
+        itemTouchHelper.attachToRecyclerView(binding.recyclerView)
+
+        val snapHelper = PagerSnapHelper()
+        snapHelper.attachToRecyclerView(binding.recyclerView)
+    }
+
+    private fun getTouchHelperCallback(): ItemTouchHelper.Callback {
+        val touchHelperCallBack = object : MyTouchHelperCallBack(binding.recyclerView.context) {
+            override fun onMove(
+                recyclerView: RecyclerView,
+                viewHolder: RecyclerView.ViewHolder,
+                target: RecyclerView.ViewHolder
+            ): Boolean {
+                chatAdapter.swapItem(viewHolder.adapterPosition, target.adapterPosition)
+                return true
+            }
+
+            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+                val position = viewHolder.adapterPosition
+                val item = chatAdapter.currentList[position]
+
+                chatAdapter.removeItem(position)
+
+                val snackBar = Snackbar.make(
+                    viewHolder.itemView,
+                    "Item was removed from the list.",
+                    Snackbar.LENGTH_LONG
+                )
+                snackBar.setAction("RESTORE") {
+                    chatAdapter.restoreItem(item, position)
+                }
+                snackBar.setActionTextColor(getColor(R.color.blue_400))
+                snackBar.show()
+            }
+        }
+        return touchHelperCallBack
     }
 }