/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.codelab.rssexample;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MyRssReader3 extends Activity{
private ArrayList<RssItem> mFeeds;
ListView mRssList;
ArrayAdapter mAdap;
private static final int ADD_ELEMENT_REQUEST = 1;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
// Load screen layout.
setContentView(R.layout.main_screen2);
// Populate our list
mFeeds = initializeList();
// Populate ArrayAdapter and bind it to ListView
mRssList = (ListView)findViewById(R.id.rssListView);
mAdap = new RssDataAdapter<RssItem>(this, R.layout.list_element, mFeeds);
mRssList.setAdapter(mAdap);
// Set the last selected item.
// (icicle is only set if this is being restarted).
if(savedInstanceState != null && savedInstanceState.containsKey("lastIndexItem"))
mRssList.setSelection(savedInstanceState.getInteger("lastIndexItem"));
}
// Store our state before we are potentially bumped from memory.
// We'd like to store the current ListView selection.
@Override
protected void onSaveInstanceState(Bundle outState){
int index = mRssList.getSelectedItemIndex();
if(index > -1){
outState.putInteger("lastIndexItem", index);
}
}
// Add our initial menu options. We will tweak this menu when it's loaded swap out
// "start service" or "stop service", depending on whether the service is currently running.
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Always call the superclass implementation to
// provide standard items.
super.onCreateOptionsMenu(menu);
menu.add(0, 0, R.string.menu_option_start, null);
menu.add(0, 1, R.string.menu_option_stop, null);
menu.add(0, 2, R.string.menu_option_add, null);
menu.add(0, 3, R.string.menu_option_delete, null);
menu.add(0, 4, R.string.menu_option_update, null);
return true;
}
// Toggle out start service/stop service depending on whether the service is running.
@Override
public boolean onPrepareOptionsMenu(Menu menu){
return true;
}
// Handle our menu clicks.
@Override
public boolean onOptionsItemSelected(Menu.Item item){
super.onOptionsItemSelected(item);
switch (item.getId()){
case 0: // Start service
showAlert(null, "You clicked 'start'!", "ok", null, false, null);
break;
case 1: // Stop service
showAlert(null, "You clicked stop!", "ok", null, false, null);
break;
case 2: // Add Item
Intent addIntent = new Intent(AddRssItem.class);
// Use an ID so that if we create a "remove item" form we
// can tell which form is returning a value.
startActivityForResult(addIntent, ADD_ELEMENT_REQUEST);
break;
case 3: // Delete item.
if(mRssList.hasFocus()){
Object selectedItem = mRssList.getSelectedItem();
mAdap.removeObject(mRssList.getSelectedItem());
}
break;
case 4: // Update all
showAlert(null, "You clicked 'Update'!", "ok", null, false, null);
break;
default:
showAlert(null, "I have no idea what you clicked!", "ok", null, false, null);
break;
}
return true;
}
// Called by the "Add RSS Item" floating screen when it closes.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if(resultCode == RESULT_OK){
switch (requestCode){
case ADD_ELEMENT_REQUEST:
RssItem newIt = new RssItem(
data.getStringExtra("url").toString(),
data.getStringExtra("title").toString());
mAdap.addObject(newIt);
mRssList.setSelection(mRssList.getCount() - 1);
break;
default:
break;
}
}
}
// Our private ArrayAdapter implementation that returns a bold TextView for
// RSS items that are unread, or a normal TextView for items that have been read.
private class RssDataAdapter<T> extends ArrayAdapter<T> {
public RssDataAdapter(Context context, int resource, List objects) {
super(context, resource, objects);
}
// Here's our only important override--returning the list item.
@Override
public View getView(int position, View convertView, ViewGroup parent){
// Get the item from the underlying array,
// Create a TextView wrapper, and change the typeface, if necessary.
RssItem item = (RssItem)this.getItem(position);
TextView view = new TextView(parent.getContext());
view.setText(item.toString());
if(! item.hasBeenRead){
Typeface type = view.getTypeface();
view.setTypeface(Typeface.create(type, Typeface.BOLD_ITALIC));
}
return view;
}
}
// Method to initialize our list of RSS items.
private ArrayList<RssItem> initializeList(){
ArrayList<RssItem> list = new ArrayList<RssItem>();
list.add(new RssItem("http://www.sciam.com/xml/sciam.xml", "Scientific American"));
list.add(new RssItem("http://newsrss.bbc.co.uk/rss/newsonline_world_edition/front_page/rss.xml", "BBC"));
list.add(new RssItem("http://feeds.theonion.com/theonion/daily", "The Onion"));
list.add(new RssItem("http://feeds.engadget.com/weblogsinc/engadget", "Engadget"));
return list;
}
}
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