Added gallery function

HW4/res/layout/activity_gallery.xml

@@ -10,9 +10,18 @@
     <GridView
         android:id="@+id/gallery"
         android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_margin="5dp"
+        android:layout_weight="1"
+        android:columnWidth="50dp"
+        android:numColumns="4" />
+
+    <Button
+        android:id="@+id/buttonExit"
+        android:layout_width="fill_parent"
         android:layout_height="wrap_content"
-        android:numColumns="4" >
-    </GridView>
+        android:layout_gravity="bottom"
+        android:text="@string/exit_button_text" />
 
 </LinearLayout>
 

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

@@ -7,19 +7,45 @@ package com.example.hw4;
  * GalleryActivity.java
  */
 
+import java.net.URL;
+import java.util.ArrayList;
+
+import com.example.hw4.MainActivity.Holder;
+
 import android.app.Activity;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
+import android.view.View.OnClickListener;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.Button;
 import android.widget.GridView;
+import android.widget.ImageView;
+import android.widget.TextView;
 import android.widget.Toast;
+import android.widget.AdapterView.OnItemClickListener;
 
 public class GalleryActivity extends Activity 
 {
 	GridView gallery;
-	int thumbsId;
+	ImageView imageView;
+	Button exitButton;
+	String[] thumbUrls;
+	ArrayList<Bitmap> thumbs;
+	ImageAdapter imageAdapter;
+	Intent imageViewerIntent;
+	ProgressDialog progress;
+	int photosId;
 	
 	@Override
 	protected void onCreate(Bundle savedInstanceState) 
@@ -27,8 +53,29 @@ public class GalleryActivity extends Activity
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_gallery);
 		
-		thumbsId = getIntent().getExtras().getInt("thumbsId");
-		Toast.makeText(getApplicationContext(), thumbsId, Toast.LENGTH_LONG).show();
+		imageViewerIntent = new Intent(this, ImageViewerActivity.class);
+		thumbUrls = getResources().getStringArray(getIntent().getExtras().getInt("thumbsId"));
+		photosId = getIntent().getExtras().getInt("photosId");
+		gallery = (GridView)findViewById(R.id.gallery);
+		exitButton = (Button)findViewById(R.id.buttonExit);
+		thumbs = new ArrayList<Bitmap>();
+		
+		progress = new ProgressDialog(this);
+		progress.setMessage("Loading...");
+		progress.setCancelable(false);
+		progress.show();
+		
+		for(String url: thumbUrls)
+		{
+			new DownloadThumbs().execute(url);
+		}
+		
+		exitButton.setOnClickListener(new OnClickListener(){
+			@Override
+			public void onClick(View v) {
+				finish();
+			}
+		});
 	}
 
 	@Override
@@ -39,15 +86,105 @@ public class GalleryActivity extends Activity
 		return true;
 	}
 
+	private class DownloadThumbs extends AsyncTask<String, Void, Bitmap>
+	{
+
 		@Override
-	public boolean onOptionsItemSelected(MenuItem item) {
-		// Handle action bar item clicks here. The action bar will
-		// automatically handle clicks on the Home/Up button, so long
-		// as you specify a parent activity in AndroidManifest.xml.
-		int id = item.getItemId();
-		if (id == R.id.action_settings) {
-			return true;
+		protected Bitmap doInBackground(String... url) 
+		{
+			Bitmap image = null;
+			
+			try
+			{
+				URL imageUrl = new URL(url[0]);
+				image = BitmapFactory.decodeStream(imageUrl.openStream());
+			}
+			catch(Exception e)
+			{
+				e.printStackTrace();
+			}
+			return image;
+		}
+		
+		@Override
+		protected void onPostExecute(Bitmap result)
+		{
+			if(result != null)
+			{
+				thumbs.add(result);
+			}
+			else
+			{
+				thumbs.add(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
+			}
+			
+			if(thumbs.size() >= thumbUrls.length)
+			{
+				imageAdapter = new ImageAdapter(gallery.getContext());
+				gallery.setAdapter(imageAdapter);
+				
+				gallery.setOnItemClickListener(new OnItemClickListener()
+				{
+					@Override
+					public void onItemClick(AdapterView<?> parent, View view,
+							int position, long id) 
+					{
+						imageViewerIntent.putExtra("urls", (int)photosId);
+						imageViewerIntent.putExtra("index", (int)position);
+						startActivity(imageViewerIntent);
+					}
+				});
+				progress.dismiss();
+			}
+		}
+	}
+	
+	public class ImageAdapter extends BaseAdapter
+	{
+		private Context context;
+		
+		public ImageAdapter(Context context)
+		{
+			this.context = context;
+		}
+		
+		@Override
+		public int getCount() 
+		{
+			return thumbs.size();
+		}
+
+		@Override
+		public Object getItem(int position)//no purpose.
+		{
+			return position;
+		}
+
+		@Override
+		public long getItemId(int position)//no purpose. only to fill the requirement of needing the method.
+		{
+			return position;
+		}
+
+		@Override
+		public View getView(int position, View convertView, ViewGroup parent) 
+		{
+			ImageView imageView;
+			View vi = convertView;
+			
+			if(vi == null)
+			{
+				imageView = new ImageView(getBaseContext());
+				//imageView.setLayoutParams(new GridView.LayoutParams(50,50));
+				imageView.setPadding(5, 5, 5, 5);
+			}
+			else
+			{
+				imageView = (ImageView)vi;
+			}
+			
+			imageView.setImageBitmap(thumbs.get(position));
+			return imageView;
 		}
-		return super.onOptionsItemSelected(item);
 	}
 }

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

@@ -41,6 +41,7 @@ public class MainActivity extends Activity {
 	}; 
 	int[] imageNames = {R.string.label_uncc, R.string.label_sports, R.string.label_ifest, R.string.label_commencement};
 	int[] thumbNames = {R.array.uncc_thumbs, R.array.football_thumbs, R.array.ifest_thumbs, R.array.commencement_thumbs};
+	int[] photoNames = {R.array.uncc_photos, R.array.football_photos, R.array.ifest_photos, R.array.commencement_photos};
 	ArrayList<Bitmap> bitmapList = new ArrayList<Bitmap>();
 	ArrayList<String> bitmapNames = new ArrayList<String>();
 	int downloadProgress;
@@ -125,8 +126,9 @@ public class MainActivity extends Activity {
 					public void onItemClick(AdapterView<?> parent, View view,
 							int position, long id) 
 					{
-						//Send intent with R.array.label
-						galleryIntent.putExtra("thumbsId", (Integer)(imageAdapter.getItem(position)));
+						//Send intent with thumbs and photos id
+						galleryIntent.putExtra("thumbsId", thumbNames[position]);
+						galleryIntent.putExtra("photosId", photoNames[position]);
 						startActivity(galleryIntent);
 					}
 				});