From 8843bcb1ecea5ad0c9fa970faa267ca488de9ad0 Mon Sep 17 00:00:00 2001
From: Zubayer Islam <36497498+zubayer87@users.noreply.github.com>
Date: Mon, 23 Dec 2019 21:29:18 -0500
Subject: [PATCH] Fixed sharedpreferences returns garbage after few runs

Fixed sharedpreferences returns garbage after few runs. It is also mentioned here: https://developer.android.com/reference/android/content/SharedPreferences
"Caution: The preference manager does not currently store a strong reference to the listener. You must store a strong reference to the listener, or it will be susceptible to garbage collection. We recommend you keep a reference to the listener in the instance data of an object that will exist as long as you need the listener."
---
 .../locationupdatesforegroundservice/MainActivity.java | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/LocationUpdatesForegroundService/app/src/main/java/com/google/android/gms/location/sample/locationupdatesforegroundservice/MainActivity.java b/LocationUpdatesForegroundService/app/src/main/java/com/google/android/gms/location/sample/locationupdatesforegroundservice/MainActivity.java
index 5244c7a7..ab5573af 100644
--- a/LocationUpdatesForegroundService/app/src/main/java/com/google/android/gms/location/sample/locationupdatesforegroundservice/MainActivity.java
+++ b/LocationUpdatesForegroundService/app/src/main/java/com/google/android/gms/location/sample/locationupdatesforegroundservice/MainActivity.java
@@ -135,8 +135,14 @@ protected void onCreate(Bundle savedInstanceState) {
     @Override
     protected void onStart() {
         super.onStart();
-        PreferenceManager.getDefaultSharedPreferences(this)
-                .registerOnSharedPreferenceChangeListener(this);
+        
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+        SharedPreferences.OnSharedPreferenceChangeListener listener = new SharedPreferences.OnSharedPreferenceChangeListener() {
+            public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
+                // Implementation
+            }
+        };
+        prefs.registerOnSharedPreferenceChangeListener(listener);
 
         mRequestLocationUpdatesButton = (Button) findViewById(R.id.request_location_updates_button);
         mRemoveLocationUpdatesButton = (Button) findViewById(R.id.remove_location_updates_button);