Actually added validation now to remaining background tasks lol

app/src/main/java/uprrp/tania/networking/FetchAssessment.java

         this.myCallBack = callback;
     }
 
+    private boolean validInputs(String... strings) {
+
+        if(strings.length != 1) {
+            Log.e(TAG, "Invalid string array length!");
+            return false;
+        }
+
+        String deviceToken = strings[0];
+
+        if(deviceToken == null) {
+            Log.e(TAG, "Encountered null device token!");
+            return false;
+        }
+
+        return true;
+
+    }
+
     @Override
-    protected JSONObject doInBackground(String... deviceTokenArray) {
-        String deviceToken = deviceTokenArray[0]; // array will only ever contain a single element
+    protected JSONObject doInBackground(String... strings) {
+
+        // Validation
+        if(!validInputs(strings)) {
+            Log.e(TAG, "Invalid inputs given!");
+            return null;
+        }
+
+        // Extract variables
+        String deviceToken = strings[0];
 
         try {
 

app/src/main/java/uprrp/tania/networking/FetchUserStatus.java

         this.myCallBack = callback;
     }
 
+    private boolean validInputs(String... strings) {
+
+        if(strings.length != 1) {
+            Log.e(TAG, "Invalid string array length!");
+            return false;
+        }
+
+        String deviceToken = strings[0];
+
+        if(deviceToken == null) {
+            Log.e(TAG, "Encountered null device token!");
+            return false;
+        }
+
+        return true;
+
+    }
+
     @Override
-    protected JSONArray doInBackground(String... deviceTokenArray) {
-        String deviceToken = deviceTokenArray[0]; // array will only ever contain a single element
+    protected JSONArray doInBackground(String... strings) {
+
+        // Validation
+        if(!validInputs(strings)) {
+            Log.e(TAG, "Invalid inputs given!");
+            return null;
+        }
+
+        // Extract variables
+        String deviceToken = strings[0];
 
         try {
 

app/src/main/java/uprrp/tania/networking/SendAnswers.java

         this.myCallback = callback;
     }
 
+    private boolean validInputs(AnsweredAssessmentModel... answeredAssessments) {
+
+        if(answeredAssessments.length != 1) {
+            Log.e(TAG, "Invalid array length!");
+            return false;
+        }
+
+        AnsweredAssessmentModel assessment = answeredAssessments[0];
+
+        if(assessment == null) {
+            Log.e(TAG, "Encountered null assessment!");
+            return false;
+        }
+
+        return true;
+
+    }
+
     // TODO: instead of making a normal POST request with
     //  the body data=<uglyJSON>, we should just send the JSON itself
     //  This is adding unnecessary layers of complexity when decoding AND encoding
     @Override
     protected String doInBackground(AnsweredAssessmentModel... answeredAssessments) {
 
+        // Validation
+        if(!validInputs(answeredAssessments)) {
+            Log.e(TAG, "Invalid inputs given!");
+            return null;
+        }
+
+        // Extract variables
         AnsweredAssessmentModel answeredAssessment = answeredAssessments[0]; // array will only ever contain a single element
 
         try {

app/src/main/java/uprrp/tania/networking/SendWithdrawal.java

         this.myCallback = callback;
     }
 
+    private boolean validInputs(String... strings) {
+
+        if(strings.length != 1) {
+            Log.e(TAG, "Invalid string array length!");
+            return false;
+        }
+
+        String deviceToken = strings[0];
+
+        if(deviceToken == null) {
+            Log.e(TAG, "Encountered null device token!");
+            return false;
+        }
+
+        return true;
+
+    }
+
     // TODO: instead of making a normal POST request with
     //  the body data=<JSON>, we should just send the JSON itself
     //  This is adding unnecessary layers of complexity when decoding AND encoding
         }
     */
     @Override
-    protected String doInBackground(String... deviceTokenArray) {
+    protected String doInBackground(String... strings) {
+
+        // Validation
+        if(!validInputs(strings)) {
+            Log.e(TAG, "Invalid inputs given!");
+            return null;
+        }
 
-        String deviceToken = deviceTokenArray[0]; // array will only ever contain one element
+        // Extract variables
+        String deviceToken = strings[0];
 
         try {