Updated on 2026-08-14

app/src/main/java/com/tangem/AppController.java

@@ -2,9 +2,21 @@ package com.tangem;
 
 import android.app.Application;
 import android.support.v7.app.AppCompatDelegate;
+import android.text.TextUtils;
+
+import com.android.volley.Request;
+import com.android.volley.RequestQueue;
+import com.android.volley.VolleyLog;
+import com.android.volley.toolbox.Volley;
 
 public class AppController extends Application {
-    private static final String TAG = "." + AppController.class.getSimpleName();
+
+    public static final String TAG = "fragment." + AppController.class.getSimpleName();
+
+    /**
+     * Global request queue for Volley
+     */
+    private RequestQueue mRequestQueue;
 
     /**
      * A singleton instance of the application class for easy access in other places
@@ -22,20 +34,64 @@ public class AppController extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
-        // init the singleton
+        // initialize the singleton
         sInstance = this;
     }
 
     /**
-     * @return singleton instance
+     * @return SeoPult singleton instance
      */
     public static synchronized AppController getInstance() {
         return sInstance;
     }
 
-    @Override
-    public void onTerminate() {
-        super.onTerminate();
+    /**
+     * @return The Volley Request queue, the queue will be created if it is null
+     */
+    public RequestQueue getRequestQueue() {
+        // lazy initialize the request queue, the queue instance will be created when it is accessed for the first time
+        if (mRequestQueue == null)
+            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
+
+        return mRequestQueue;
+    }
+
+    /**
+     * Adds the specified request to the global queue, if tag is specified
+     * then it is used else Default TAG is used.
+     *
+     * @param req
+     * @param tag
+     */
+    public <T> void addToRequestQueue(Request<T> req, String tag) {
+        // set the default tag if tag is empty
+        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
+        VolleyLog.d("Adding request to queue: %s", req.getUrl());
+        getRequestQueue().add(req);
+    }
+
+    /**
+     * Adds the specified request to the global queue using the Default TAG.
+     *
+     * @param req
+     */
+    public <T> void addToRequestQueue(Request<T> req) {
+        // set the default tag if tag is empty
+        req.setTag(TAG);
+
+        getRequestQueue().add(req);
+    }
+
+    /**
+     * Cancels all pending requests by the specified TAG, it is important
+     * to specify a TAG so that the pending/ongoing requests can be cancelled.
+     *
+     * @param tag
+     */
+    public void cancelPendingRequests(Object tag) {
+        if (mRequestQueue != null) {
+            mRequestQueue.cancelAll(tag);
+        }
     }
 
 }