Fix autoCapitalize bitmask collision with numeric inputType flags

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.kt

@@ -117,6 +117,7 @@ public open class ReactEditText public constructor(context: Context) : AppCompat
   private var listeners: CopyOnWriteArrayList<TextWatcher>?
 
   public var stagedInputType: Int
+  internal var stagedAutoCapitalize: Int = UNSET_AUTO_CAPITALIZE
   public var submitBehavior: String? = null
   public var dragAndDropFilter: List<String>? = null
 
@@ -1222,6 +1223,7 @@ public open class ReactEditText public constructor(context: Context) : AppCompat
 
   public companion object {
     public val DEBUG_MODE: Boolean = ReactBuildConfig.DEBUG && false
+    internal const val UNSET_AUTO_CAPITALIZE: Int = -1
 
     private val keyListener: KeyListener = QwertyKeyListener.getInstanceForFullKeyboard()
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.kt

@@ -718,7 +718,9 @@ public open class ReactTextInputManager public constructor() :
       }
     }
 
-    updateStagedInputTypeFlag(view, AUTOCAPITALIZE_FLAGS, autoCapitalizeValue)
+    // Deferred to onAfterUpdateTransaction() so we can reconcile with the resolved
+    // keyboard type — AUTOCAPITALIZE_FLAGS collides with numeric inputType flags.
+    view.stagedAutoCapitalize = autoCapitalizeValue
   }
 
   @ReactProp(name = "keyboardType")
@@ -882,6 +884,7 @@ public open class ReactTextInputManager public constructor() :
   override fun onAfterUpdateTransaction(view: ReactEditText) {
     super.onAfterUpdateTransaction(view)
     view.maybeUpdateTypeface()
+    reconcileAutoCapitalize(view)
     view.commitStagedInputType()
   }
 
@@ -1129,6 +1132,25 @@ public open class ReactTextInputManager public constructor() :
 
     private const val IME_ACTION_ID = 0x670
 
+    // AUTOCAPITALIZE_FLAGS (0x7000) shares bit positions with TYPE_NUMBER_FLAG_SIGNED
+    // (0x1000) and TYPE_NUMBER_FLAG_DECIMAL (0x2000). We apply autocapitalize here
+    // after all props are set so the resolved input class determines whether the
+    // flags are meaningful.
+    private fun reconcileAutoCapitalize(view: ReactEditText) {
+      val autoCapValue = view.stagedAutoCapitalize
+      if (autoCapValue == ReactEditText.UNSET_AUTO_CAPITALIZE) return
+
+      val inputClass = view.stagedInputType and InputType.TYPE_MASK_CLASS
+      if (inputClass == InputType.TYPE_CLASS_TEXT) {
+        updateStagedInputTypeFlag(view, AUTOCAPITALIZE_FLAGS, autoCapValue)
+      } else {
+        // Only strip 0x4000 (CAP_SENTENCES) — 0x1000/0x2000 are valid numeric flags
+        // (SIGNED/DECIMAL) and must not be cleared.
+        view.stagedInputType =
+            view.stagedInputType and InputType.TYPE_TEXT_FLAG_CAP_SENTENCES.inv()
+      }
+    }
+
     // Sets the correct password type, since numeric and text passwords have different types
     private fun checkPasswordType(view: ReactEditText) {
       if (

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/views/textinput/ReactTextInputPropertyTest.kt

@@ -125,6 +125,65 @@ class ReactTextInputPropertyTest {
     assertThat(view.inputType and InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS).isZero
   }
 
+  @Test
+  fun testAutoCapitalizeDoesNotStripNumericFlags() {
+    val numericTypeFlags =
+        (InputType.TYPE_CLASS_NUMBER or
+            InputType.TYPE_NUMBER_FLAG_DECIMAL or
+            InputType.TYPE_NUMBER_FLAG_SIGNED)
+
+    manager.updateProperties(view, buildStyles("keyboardType", "numeric"))
+    assertThat(view.inputType and numericTypeFlags).isEqualTo(numericTypeFlags)
+
+    manager.updateProperties(
+        view,
+        buildStyles("autoCapitalize", InputType.TYPE_TEXT_FLAG_CAP_SENTENCES),
+    )
+    assertThat(view.inputType and InputType.TYPE_NUMBER_FLAG_SIGNED).isNotZero
+    assertThat(view.inputType and InputType.TYPE_NUMBER_FLAG_DECIMAL).isNotZero
+  }
+
+  @Test
+  fun testAutoCapitalizeAndNumericKeyboardInSameTransaction() {
+    val numericTypeFlags =
+        (InputType.TYPE_CLASS_NUMBER or
+            InputType.TYPE_NUMBER_FLAG_DECIMAL or
+            InputType.TYPE_NUMBER_FLAG_SIGNED)
+
+    manager.updateProperties(
+        view,
+        buildStyles(
+            "autoCapitalize",
+            InputType.TYPE_TEXT_FLAG_CAP_SENTENCES,
+            "keyboardType",
+            "numeric",
+        ),
+    )
+    assertThat(view.inputType and numericTypeFlags).isEqualTo(numericTypeFlags)
+    assertThat(view.inputType and InputType.TYPE_TEXT_FLAG_CAP_SENTENCES).isZero
+  }
+
+  @Test
+  fun testAutoCapitalizeReappliesWhenKeyboardTypeChangesFromNumericToText() {
+    // CAP_SENTENCES (0x4000) doesn't share a bit position with any numeric flag,
+    // unlike CAP_WORDS (0x2000) / CAP_CHARACTERS (0x1000).
+    manager.updateProperties(
+        view,
+        buildStyles(
+            "autoCapitalize",
+            InputType.TYPE_TEXT_FLAG_CAP_SENTENCES,
+            "keyboardType",
+            "numeric",
+        ),
+    )
+    assertThat(view.inputType and InputType.TYPE_MASK_CLASS).isEqualTo(InputType.TYPE_CLASS_NUMBER)
+    assertThat(view.inputType and InputType.TYPE_TEXT_FLAG_CAP_SENTENCES).isZero
+
+    manager.updateProperties(view, buildStyles("keyboardType", "default"))
+    assertThat(view.inputType and InputType.TYPE_MASK_CLASS).isEqualTo(InputType.TYPE_CLASS_TEXT)
+    assertThat(view.inputType and InputType.TYPE_TEXT_FLAG_CAP_SENTENCES).isNotZero
+  }
+
   @Test
   fun testPlaceholder() {
     manager.updateProperties(view, buildStyles())