use fresco to load notes images.

  this caches the images, thus removes all the stutter and lag.
  'special portion of memory' == #somuchwin

  lots of of love to @facebook

Author: championswimmer

app/build.gradle

@@ -47,6 +47,7 @@ dependencies {
     compile 'com.parse.bolts:bolts-android:1.1.4'
     compile 'com.facebook.android:facebook-android-sdk:3.21.1'
     compile 'com.koushikdutta.ion:ion:2.0.5'
+    compile 'com.facebook.fresco:fresco:0.4.0+'
     compile 'com.google.android.gms:play-services:6.5.87'
     compile 'com.android.support:palette-v7:21.0.0'
 }

app/libs/nineoldandroids-2.4.0.jar

@@ -15,6 +15,20 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+
+## - - - Facebook - - - ##
 -keep class com.facebook.** {
    *;
-}
+}
+
+## - - - Fresco - - - ##
+# Keep our interfaces so they can be used by other ProGuard rules.
+# See http://sourceforge.net/p/proguard/bugs/466/
+-keep,allowobfuscation @interface com.facebook.common.internal.DoNotStrip
+# Do not strip any method/class that is annotated with @DoNotStrip
+-keep @com.facebook.common.internal.DoNotStrip class *
+-keepclassmembers class * {
+@com.facebook.common.internal.DoNotStrip *;
+}
+-dontwarn okio.**
+-dontwarn javax.annotation.**

app/proguard-rules.pro

@@ -7,6 +7,7 @@
 import android.support.v7.app.ActionBarActivity;
 import android.util.Log;
 
+import com.facebook.drawee.backends.pipeline.Fresco;
 import com.parse.Parse;
 import com.parse.ParseACL;
 import com.parse.ParseFacebookUtils;
@@ -29,6 +30,7 @@ public void onCreate() {
         ParseACL defaultACL = new ParseACL();
         ParseFacebookUtils.initialize(getResources().getString(R.string.facebook_app_id));
         ParseTwitterUtils.initialize("FfUOeQ5OBuv0qOkdHbfXCrwdk", "xQmFnUSii54eS3iUrl0uIrxfeL4EfIdFc6iyoHUDgSIVGDbauD");
+        Fresco.initialize(this);
     }
 
     public static void setCustomTheme(ActionBarActivity actionBarActivity, int primary, int secondary){

app/src/main/java/in/tosc/studddin/ApplicationWrapper.java

@@ -1,12 +1,14 @@
 package in.tosc.studddin.fragments.notes;
 
 import android.content.Context;
+import android.net.Uri;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
+import com.facebook.drawee.view.SimpleDraweeView;
 import com.parse.GetDataCallback;
 import com.parse.ParseException;
 import com.parse.ParseFile;
@@ -56,12 +58,9 @@ public void onBindViewHolder(ViewHolder holder, final int position) {
 
         holder.topicNameTxtView.setText(notesTopicName.get(position));
 
-        holder.notesImage.setParseFile(notesFirstImage.get(position).get(0));
-        holder.notesImage.loadInBackground(new GetDataCallback() {
-            @Override
-            public void done(byte[] bytes, ParseException e) {
-            }
-        });
+        Uri notesThumbUri = Uri.parse(notesFirstImage.get(position).get(0).getUrl());
+
+        holder.notesImage.setImageURI(notesThumbUri);
 
         holder.itemView.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -85,14 +84,14 @@ public int getItemCount() {
 
     public static class ViewHolder extends RecyclerView.ViewHolder {
         public TextView  topicNameTxtView;
-        public ParseImageView notesImage;
+        public SimpleDraweeView notesImage;
 
 
         public ViewHolder(View itemView) {
             super(itemView);
 
             topicNameTxtView = (TextView) itemView.findViewById(R.id.notes_gridview_topicname);
-            notesImage = (ParseImageView) itemView.findViewById(R.id.notes_gridview_image_view);
+            notesImage = (SimpleDraweeView) itemView.findViewById(R.id.notes_gridview_image_view);
 
         }
 

app/src/main/java/in/tosc/studddin/fragments/notes/NotesCustomGridViewAdapter.java

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 
 <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:fresco="http://schemas.android.com/apk/res-auto"
     android:orientation="horizontal"
     android:layout_width="match_parent"
     xmlns:card_view="http://schemas.android.com/apk/res-auto"
@@ -15,12 +16,10 @@
         android:layout_height="match_parent"
         >
 
-        <com.parse.ParseImageView
+        <com.facebook.drawee.view.SimpleDraweeView
             android:id="@+id/notes_gridview_image_view"
             android:layout_width="match_parent"
             android:layout_height="200dp"
-            android:layout_centerHorizontal="true"
-            android:layout_alignParentTop="true"
             android:scaleType="fitXY"/>