Added basic category functionality.

res/layout/choose_category_dialog.xml

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 	android:layout_width="match_parent"
 	android:layout_height="match_parent">
 	
-	<TextView android:text="Choose category"
+	<ListView android:id="@+id/choose_category_list"
 		android:layout_width="wrap_content"
-		android:layout_height="wrap_content" />
+		android:layout_height="wrap_content">
+	</ListView>
 
-</RelativeLayout>
+</FrameLayout>

res/layout/choose_category_list_row.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	android:orientation="vertical"
+	android:layout_width="wrap_content"
+	android:layout_height="wrap_content"
+	android:paddingTop="3px"
+	android:paddingBottom="3px">
+    
+    <TextView android:id="@+id/choose_category_list_row_text"
+    	android:layout_height="wrap_content" 
+    	android:layout_width="wrap_content" />    
+</FrameLayout>

src/com/studentersamfundet/app/ui/ChooseCategoryDialog.java

@@ -0,0 +1,61 @@
+package com.studentersamfundet.app.ui;
+
+import java.security.InvalidParameterException;
+
+import com.studentersamfundet.app.Event;
+import com.studentersamfundet.app.R;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.AdapterView.OnItemClickListener;
+
+public class ChooseCategoryDialog extends Dialog {
+	private final Callback callback;
+	private String chosenCategory = Event.ALL;
+	
+	public interface Callback {
+		public void run(String ... message);
+	}
+	
+	private class OnDismiss implements OnDismissListener {
+		public void onDismiss(DialogInterface dialog) {
+			callback.run(chosenCategory);
+		}
+	}
+	
+	public ChooseCategoryDialog(Context context, Callback callback) {
+		super(context);
+		
+		if (callback == null)
+			throw new InvalidParameterException("callback is not supposed to be null!");
+		
+		this.callback = callback;
+		
+		setContentView(R.layout.choose_category_dialog);
+    	setTitle("Choose category");
+    	setOnDismissListener(new OnDismiss());
+    	populateList(context);
+	}
+	
+	private void populateList(Context context) {
+		final String[] categories = new String[] {
+			Event.ALL,
+			"film"
+		};
+		
+		ListView list = (ListView)findViewById(R.id.choose_category_list);
+		list.setAdapter(new ArrayAdapter<String>(context, R.layout.choose_category_list_row, R.id.choose_category_list_row_text, categories));
+		list.setOnItemClickListener(new OnItemClickListener() {
+			public void onItemClick(AdapterView<?> parent, View view, int position,
+					long id) {
+				ChooseCategoryDialog.this.chosenCategory = categories[position];
+				ChooseCategoryDialog.this.dismiss();
+			}
+		});
+	}
+}

src/com/studentersamfundet/app/ui/ProgramListActivity.java

@@ -26,6 +26,7 @@ import com.studentersamfundet.app.Event;
 import com.studentersamfundet.app.FeedFetcher;
 import com.studentersamfundet.app.R;
 import com.studentersamfundet.app.XmlParser;
+import com.studentersamfundet.app.ui.ChooseCategoryDialog.Callback;
 
 public class ProgramListActivity extends BaseDnsActivity {
 	public static final String feedURL = "http://studentersamfundet.no/rss/lars_program_feed.php";
@@ -61,8 +62,7 @@ public class ProgramListActivity extends BaseDnsActivity {
             return true;
         
         case R.id.menu_categories:
-        	String category = chooseCategory();
-        	this.createList(category, false);
+        	createCategoryDialog();
         	return true;
             
         default:
@@ -142,12 +142,16 @@ public class ProgramListActivity extends BaseDnsActivity {
     	
     }
     
-    protected String chooseCategory() {
-    	Dialog dialog = new Dialog(this);
-    	dialog.setContentView(R.layout.choose_category_dialog);
+    protected void createCategoryDialog() {
+    	Dialog dialog = new ChooseCategoryDialog(this, new Callback() {
+			public void run(String... message) {
+				if (message.length < 1) 
+					message = new String[] { Event.ALL };
+				
+				ProgramListActivity.this.createList(message[0], false);
+			}
+		});
     	
-    	dialog.setTitle("Choose category");
     	dialog.show();
-    	return Event.ALL;
     }
 }