Add a comment for setAdditionalInputMethodSubtypes
Change-Id: I3a19471b80a6f8a68473cba6f0fc934bd052af10
diff --git a/core/java/android/view/inputmethod/InputMethodManager.java b/core/java/android/view/inputmethod/InputMethodManager.java
index da5baf8..302be57 100644
--- a/core/java/android/view/inputmethod/InputMethodManager.java
+++ b/core/java/android/view/inputmethod/InputMethodManager.java
@@ -1583,6 +1583,14 @@
/**
* Set additional input method subtypes. Only a process which shares the same uid with the IME
* can add additional input method subtypes to the IME.
+ * Please note that a subtype's status is stored in the system.
+ * For example, enabled subtypes are remembered by the framework even after they are removed
+ * by using this method. If you re-add the same subtypes again,
+ * they will just get enabled. If you want to avoid such conflicts, for instance, you may
+ * want to create a "different" new subtype even with the same locale and mode,
+ * by changing its extra value. The different subtype won't get affected by the stored past
+ * status. (You may want to take a look at {@link InputMethodSubtype#hashCode()} to refer
+ * to the current implementation.)
* @param imiId Id of InputMethodInfo which additional input method subtypes will be added to.
* @param subtypes subtypes will be added as additional subtypes of the current input method.
* @return true if the additional input method subtypes are successfully added.