Added template for RequestQueue singleton

commons/src/main/java/fr/free/nrw/commons/upload/MwVolley.java

@@ -0,0 +1,7 @@
+package fr.free.nrw.commons.upload;
+
+/**
+ * Created by misao on 03-Jan-16.
+ */
+public class MwVolley {
+}

commons/src/main/java/fr/free/nrw/commons/upload/ShareActivity.java

@@ -2,6 +2,8 @@ package fr.free.nrw.commons.upload;
 
 import android.content.*;
 import android.os.*;
+
+import com.android.volley.Response;
 import com.nostra13.universalimageloader.core.ImageLoader;
 import android.net.*;
 import android.support.v4.app.NavUtils;
@@ -10,6 +12,8 @@ import com.actionbarsherlock.view.MenuItem;
 import android.util.Log;
 import android.widget.*;
 
+import org.json.JSONObject;
+
 import fr.free.nrw.commons.*;
 import fr.free.nrw.commons.modifications.CategoryModifier;
 import fr.free.nrw.commons.modifications.TemplateRemoveModifier;
@@ -203,6 +207,13 @@ public  class       ShareActivity
         requestAuthToken();
     }
 
+    private class ResponseListener<T> implements Response.Listener<T>{
+        @Override
+        public void onResponse(T response){
+
+        }
+    }
+
 
     @Override
     protected void onDestroy() {

commons/src/main/java/fr/free/nrw/commons/upload/VolleyRequestQueue.java

@@ -0,0 +1,46 @@
+package fr.free.nrw.commons.upload;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.util.LruCache;
+
+import com.android.volley.Request;
+import com.android.volley.RequestQueue;
+import com.android.volley.toolbox.ImageLoader;
+import com.android.volley.toolbox.Volley;
+
+/**
+ * Created by misao on 03-Jan-16.
+ */
+public class VolleyRequestQueue {
+    private static VolleyRequestQueue mInstance;
+    private RequestQueue mRequestQueue;
+    private ImageLoader mImageLoader;
+    private static Context mContext;
+
+    private VolleyRequestQueue(Context context) {
+        mContext = context;
+        mRequestQueue = getRequestQueue();
+    }
+
+    public static synchronized VolleyRequestQueue getInstance(Context context) {
+        if (mInstance == null) {
+            mInstance = new VolleyRequestQueue(context);
+        }
+        return mInstance;
+    }
+
+    public RequestQueue getRequestQueue() {
+        if (mRequestQueue == null) {
+            // getApplicationContext() is key, it keeps you from leaking the
+            // Activity or BroadcastReceiver if someone passes one in.
+            mRequestQueue = Volley.newRequestQueue(mContext.getApplicationContext());
+        }
+        return mRequestQueue;
+    }
+
+    public <T> void addToRequestQueue(Request<T> req) {
+        getRequestQueue().add(req);
+    }
+    
+}