feat: update change listener

Author: Rick

app/src/main/java/com/huynn109/increase_decrease_button_demo/MainActivity.kt

@@ -11,8 +11,8 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         val btn = findViewById<IncreaseDecreaseButton>(R.id.inDeButton)
-        btn.onChangeListener {
-            Toast.makeText(this.applicationContext, "$it", Toast.LENGTH_SHORT).show()
+        btn.onChangeListener { number, isIncrease ->
+            Toast.makeText(this.applicationContext, "$number", Toast.LENGTH_SHORT).show()
             Timber.d("onCreate: ${btn.getCurrentNumber()}")
         }
     }

lib/src/main/java/com/huynn109/IncreaseDecreaseButton.kt

@@ -25,7 +25,7 @@ class IncreaseDecreaseButton @JvmOverloads constructor(
     private var decreaseButton: MaterialButton? = null
     private var textViewNumber: MaterialTextView? = null
     private var currentNumber = 0
-    private var onChangeListener: ((number: Int) -> Unit)? = null
+    private var onChangeListener: ((number: Int, isIncrease: Boolean) -> Unit)? = null
 
     init {
         initView()
@@ -41,14 +41,14 @@ class IncreaseDecreaseButton @JvmOverloads constructor(
 
     private fun initEvent() {
         increaseButton?.setOnClickListener {
-            handleOnNumber(++currentNumber)
+            handleOnNumber(++currentNumber, isIncrease = true)
         }
         decreaseButton?.setOnClickListener {
-            handleOnNumber(--currentNumber)
+            handleOnNumber(--currentNumber, isIncrease = false)
         }
     }
 
-    fun onChangeListener(onChangeListener: ((number: Int) -> Unit)?) {
+    fun onChangeListener(onChangeListener: ((number: Int, isIncrease: Boolean) -> Unit)?) {
         this.onChangeListener = onChangeListener
     }
 
@@ -61,11 +61,11 @@ class IncreaseDecreaseButton @JvmOverloads constructor(
         handleViewDecreaseButton()
     }
 
-    private fun handleOnNumber(currentNumber: Int) {
+    private fun handleOnNumber(currentNumber: Int, isIncrease: Boolean) {
         handleViewIncreaseButton()
         handleViewDecreaseButton()
         handleCurrentNumber(currentNumber)
-        onChangeListener?.invoke(currentNumber)
+        onChangeListener?.invoke(currentNumber, isIncrease)
     }
 
     private fun handleCurrentNumber(number: Int) {