Add (almost) everything for the ImageViewer activity

Still needs gesture recognition

HW4/res/layout/activity_image_viewer.xml

@@ -1,7 +1,9 @@
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/FrameLayout1"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:background="@color/black"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
@@ -9,43 +11,40 @@
     tools:context=".ImageViewerActivity" >
 
     <ImageView
-        android:id="@+id/imageView1"
+        android:id="@+id/imgViewer"
-        android:layout_width="wrap_content"
+        android:layout_width="fill_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="fill_parent"
-        android:layout_alignParentBottom="true"
+        android:layout_gravity="center_horizontal"
-        android:layout_alignParentLeft="true"
+        android:scaleType="centerInside" />
-        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_gravity="bottom" >
-        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"
-            android:onClick="onClickPrev" />
+            android:text="@string/btnPrev" />
 
         <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"
-            android:onClick="onClickBack" />
+            android:text="@string/btnBack" />
 
         <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"
-            android:onClick="onClickNext" />
+            android:text="@string/btnNext" />
     </LinearLayout>
 
-</RelativeLayout>
+</FrameLayout>

HW4/res/values/colors.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+ <color name="white">#FFFFFF</color>
+ <color name="yellow">#FFFF00</color>
+ <color name="fuchsia">#FF00FF</color>
+ <color name="red">#FF0000</color>
+ <color name="silver">#C0C0C0</color>
+ <color name="gray">#808080</color>
+ <color name="olive">#808000</color>
+ <color name="purple">#800080</color>
+ <color name="maroon">#800000</color>
+ <color name="aqua">#00FFFF</color>
+ <color name="lime">#00FF00</color>
+ <color name="teal">#008080</color>
+ <color name="green">#008000</color>
+ <color name="blue">#0000FF</color>
+ <color name="navy">#000080</color>
+ <color name="black">#000000</color>
+</resources>

HW4/src/com/example/hw4/ImageViewerActivity.java

@@ -1,11 +1,16 @@
 package com.example.hw4;
 
+import java.net.URL;
+
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.app.Activity;
+import android.app.ProgressDialog;
 import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.view.Menu;
 import android.view.View;
+import android.widget.ImageView;
 
 public class ImageViewerActivity extends Activity {
 	
@@ -13,6 +18,8 @@ public class ImageViewerActivity extends Activity {
 	String[] urls;
 	int currentIndex;
 	
+	ProgressDialog dialog;
+
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
@@ -22,6 +29,8 @@ public class ImageViewerActivity extends Activity {
 		urlsId = extras.getInt("urls");
 		urls = getResources().getStringArray(urlsId);
 		currentIndex = extras.getInt("index");
+		
+		displayImage(currentIndex);
 	}
 
 	@Override
@@ -44,30 +53,50 @@ public class ImageViewerActivity extends Activity {
 	}
 	
 	private void displayPrev() {
-		currentIndex -= 1;
+		// Wrapping backwards requires more than just modulo
+		if (currentIndex == 0)
+			currentIndex = urls.length - 1;
+		else
+			currentIndex -= 1;
+		
 		displayImage(currentIndex);
 	}
 	
 	private void displayNext() {
-		currentIndex += 1;
+		currentIndex = (currentIndex + 1) % urls.length;
 		displayImage(currentIndex);
 	}
 	
 	public void displayImage(int indexToDisplay) {
-		
+		ImageView view = (ImageView)findViewById(R.id.imgViewer);
-		
+		view.setImageBitmap(null);
+		new ImageDownloader().execute(urls[indexToDisplay]);
+		dialog = new ProgressDialog(this);
+		dialog.setCancelable(false);
+		dialog.show();
 	}
 	
 	private class ImageDownloader extends AsyncTask<String, Void, Bitmap> {
 		@Override
 		protected Bitmap doInBackground(String... params) {
+			try
+			{
+				URL imageUrl = new URL(params[0]);
+				return BitmapFactory.decodeStream(imageUrl.openStream());
+			}
+			catch(Exception e)
+			{
+				e.printStackTrace();
+			}
+			
 			return null;
 		}
 		
 		@Override
 		protected void onPostExecute(Bitmap result) {
-			// TODO Auto-generated method stub
+			dialog.cancel();
-			super.onPostExecute(result);
+			ImageView view = (ImageView)findViewById(R.id.imgViewer);
+			view.setImageBitmap(result);
 		}
 	}