/*
* 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.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;
import java.util.logging.Logger;
public class MyRssReader2 extends Activity{
private ArrayList<RssItem> mFeeds = null;
ListView mRssList = null;
private Logger mLogger = Logger.getLogger("com.example.codelab.rssexample");
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
// Load screen layout.
setContentView(R.layout.main_screen2);
// Populate our list
mFeeds = initializeList();
mLogger.info("MyRssReader.onCreate-1 mFeeds value:" + mFeeds.size());
// BEGIN_INCLUDE(2_2)
// Populate ArrayAdapter and bind it to ListView
mRssList = (ListView)findViewById(R.id.rssListView);
if(mRssList == null){
// Note: Calling showAlert() would fail here because dialogs opened
// in onCreate won't be displayed properly, if at all.
mLogger.warning("MyRssReader.onCreate-2 -- Couldn't instantiate a ListView!");
}
RssDataAdapter<RssItem> adap = new RssDataAdapter<RssItem>(this, R.layout.add_item, mFeeds);
if(adap == null){
mLogger.warning("MyRssReader.onCreate-3 -- Couldn't instantiate RssDataAdapter!");
}
if(mFeeds == null){
mLogger.warning("MyRssReader.onCreate-4 -- Couldn't instantiate a ListView!");
}
mRssList.setAdapter(adap);
// END_INCLUDE(2_2)
mLogger.info("MyRssReader.onCreate-5 -- Loading preferences.");
// Set the last selected item.
// (icicle is only set if this is being restarted).
if(savedInstanceState != null && savedInstanceState.containsKey("lastIndexItem"))
{
Integer selectedItem = savedInstanceState.getInteger("lastIndexItem");
if(selectedItem >= 0 && selectedItem < mRssList.getChildCount()){
mRssList.setSelection(savedInstanceState.getInteger("lastIndexItem"));
}
mLogger.info("MyRssReader.onCreate-6 -- Last selected item:" + selectedItem);
}
}
// 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, "Start RSS Service", null);
menu.add(0, 1, "Stop RSS Service", null);
menu.add(0, 2, "Add New Feed", null);
menu.add(0, 3, "Delete Feed", null);
menu.add(0, 4, "Update All Feeds", 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){
switch (item.getId()){
case 0:
showAlert(null, "You clicked 'start'!", "ok", null, false, null);
break;
case 1:
showAlert(null, "You clicked stop!", "ok", null, false, null);
break;
case 2:
showAlert(null, "You clicked 'Add'!", "ok", null, false, null);
break;
case 3:
showAlert(null, "You clicked 'Delete'!", "ok", null, false, null);
break;
case 4:
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;
}
// 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.
// BEGIN_INCLUDE(2_3)
private class RssDataAdapter<T> extends ArrayAdapter<T> {
public RssDataAdapter(Context context, int resource, List objects) {
super(context, resource, objects);
}
// END_INCLUDE(2_3)
// Here's our only important override--returning the list item.
@Override
public View getView(int position, View convertView, ViewGroup parent){
TextView view = null;
// Get the item from the underlying array,
// Create a TextView wrapper, and change the typeface, if necessary.
RssItem item = (RssItem)this.getItem(position);
if(item != null)
{
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;
}
}
//BEGIN_INCLUDE(2_1)
// 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://www.theonion.com/content/feeds/daily.", "The Onion"));
list.add(new RssItem("http://feeds.engadget.com/weblogsinc/engadget", "Engadget"));
return list;
}
//END_INCLUDE(2_1)
}
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