From c213cc0962c13cd8450ea1be89775c40dc7f7f15 Mon Sep 17 00:00:00 2001
From: Alex Ning <chineseperson5@gmail.com>
Date: Wed, 2 Dec 2020 15:20:29 +0800
Subject: [PATCH] Fix some NullPointerException.

---
 .../subreddit/SubredditListingDataSource.java |  2 +-
 .../infinityforreddit/user/ParseUserData.java | 19 ++++++++++---------
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditListingDataSource.java b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditListingDataSource.java
index 3757cde9..a9dad4b7 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditListingDataSource.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditListingDataSource.java
@@ -83,7 +83,7 @@ public class SubredditListingDataSource extends PageKeyedDataSource<String, Subr
         this.params = params;
         this.callback = callback;
 
-        if (params.key.equals("") || params.key.equals("null")) {
+        if (params.key == null || params.key.equals("") || params.key.equals("null")) {
             return;
         }
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/user/ParseUserData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/user/ParseUserData.java
index 8e56b3ab..5416e056 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/user/ParseUserData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/user/ParseUserData.java
@@ -70,28 +70,29 @@ public class ParseUserData {
     private static class ParseUserDataAsyncTask extends AsyncTask<Void, Void, Void> {
         private JSONObject jsonResponse;
         private ParseUserDataListener parseUserDataListener;
-        private boolean parseFailed;
+        private boolean parseFailed = false;
 
         private UserData userData;
 
         ParseUserDataAsyncTask(String response, ParseUserDataListener parseUserDataListener) {
+            this.parseUserDataListener = parseUserDataListener;
             try {
                 jsonResponse = new JSONObject(response);
-                this.parseUserDataListener = parseUserDataListener;
-                parseFailed = false;
             } catch (JSONException e) {
+                parseFailed = true;
                 e.printStackTrace();
-                parseUserDataListener.onParseUserDataFailed();
             }
         }
 
         @Override
         protected Void doInBackground(Void... voids) {
-            try {
-                userData = parseUserDataBase(jsonResponse, true);
-            } catch (JSONException e) {
-                parseFailed = true;
-                e.printStackTrace();
+            if (!parseFailed) {
+                try {
+                    userData = parseUserDataBase(jsonResponse, true);
+                } catch (JSONException e) {
+                    parseFailed = true;
+                    e.printStackTrace();
+                }
             }
             return null;
         }