Ensure Preference listener is unregistered

Change-Id: I1a4d1e7bc45fc30cb1b63ea6020f0eee6e804333

2 files changed, 9 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 20209b627..2050c7663 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -561,6 +561,9 @@ public final class LatinIME extends InputMethodService implements KeyboardAction
         }
         mSettings.onDestroy();
         unregisterReceiver(mReceiver);
+        if (ProductionFlag.IS_EXPERIMENTAL) {
+            ResearchLogger.getInstance().onDestroy();
+        }
         // TODO: The experimental version is not supported by the Dictionary Pack Service yet.
         if (!ProductionFlag.IS_EXPERIMENTAL) {
             unregisterReceiver(mDictionaryPackInstallReceiver);
diff --git a/java/src/com/android/inputmethod/research/ResearchLogger.java b/java/src/com/android/inputmethod/research/ResearchLogger.java
index 25633d630..b149718bf 100644
--- a/java/src/com/android/inputmethod/research/ResearchLogger.java
+++ b/java/src/com/android/inputmethod/research/ResearchLogger.java
@@ -322,6 +322,12 @@ public class ResearchLogger implements SharedPreferences.OnSharedPreferenceChang
         mMainKeyboardView = null;
     }
 
+    public void onDestroy() {
+        if (mPrefs != null) {
+            mPrefs.unregisterOnSharedPreferenceChangeListener(this);
+        }
+    }
+
     private boolean hasSeenSplash() {
         return mPrefs.getBoolean(PREF_RESEARCH_HAS_SEEN_SPLASH, false);
     }