diff --git a/HW4/res/layout/activity_image_viewer.xml b/HW4/res/layout/activity_image_viewer.xml
index ff51088..e4a7da6 100644
--- a/HW4/res/layout/activity_image_viewer.xml
+++ b/HW4/res/layout/activity_image_viewer.xml
@@ -8,9 +8,44 @@
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context=".ImageViewerActivity" >
 
-    <TextView
+    <ImageView
+        android:id="@+id/imageView1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/hello_world" />
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentRight="true"
+        android:layout_alignParentTop="true" />
+
+    <LinearLayout
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true" >
+
+        <Button
+            android:id="@+id/btnPrev"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/btnPrev"
+            android:onClick="onClickPrev" />
+
+        <Button
+            android:id="@+id/btnBack"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/btnBack"
+            android:onClick="onClickBack" />
+
+        <Button
+            android:id="@+id/btnNext"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/btnNext"
+            android:onClick="onClickNext" />
+    </LinearLayout>
 
 </RelativeLayout>
diff --git a/HW4/res/values/strings.xml b/HW4/res/values/strings.xml
index d9f1f71..1dbdf22 100644
--- a/HW4/res/values/strings.xml
+++ b/HW4/res/values/strings.xml
@@ -213,4 +213,10 @@
 
     <string name="hello_world">Hello world!</string>
 
+    <string name="btnPrev">Previous</string>
+
+    <string name="btnBack">Back</string>
+
+    <string name="btnNext">Next</string>
+
 </resources>
\ No newline at end of file
diff --git a/HW4/src/com/example/hw4/ImageViewerActivity.java b/HW4/src/com/example/hw4/ImageViewerActivity.java
index 427bc60..7131563 100644
--- a/HW4/src/com/example/hw4/ImageViewerActivity.java
+++ b/HW4/src/com/example/hw4/ImageViewerActivity.java
@@ -1,15 +1,27 @@
 package com.example.hw4;
 
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.app.Activity;
+import android.graphics.Bitmap;
 import android.view.Menu;
+import android.view.View;
 
 public class ImageViewerActivity extends Activity {
+	
+	int urlsId;
+	String[] urls;
+	int currentIndex;
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_image_viewer);
+		
+		Bundle extras = getIntent().getExtras();
+		urlsId = extras.getInt("urls");
+		urls = getResources().getStringArray(urlsId);
+		currentIndex = extras.getInt("index");
 	}
 
 	@Override
@@ -18,5 +30,35 @@ public class ImageViewerActivity extends Activity {
 		getMenuInflater().inflate(R.menu.image_viewer, menu);
 		return true;
 	}
+	
+	public void onClickPrev(View v) {
+		
+	}
+		
+	public void onClickNext(View v) {
+		
+	}
+	
+	public void onClickBack(View v) {
+		finish();
+	}
+	
+	public void displayImage(int indexToDisplay) {
+		
+		
+	}
+	
+	private class ImageDownloader extends AsyncTask<String, Void, Bitmap> {
+		@Override
+		protected Bitmap doInBackground(String... params) {
+			return null;
+		}
+		
+		@Override
+		protected void onPostExecute(Bitmap result) {
+			// TODO Auto-generated method stub
+			super.onPostExecute(result);
+		}
+	}
 
 }