1 files changed, 6 insertions, 0 deletions
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);
     }