/*
* 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.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Typeface;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemSelectedListener;
import java.util.logging.Logger;
public class MyRssReader5 extends Activity implements OnItemSelectedListener {
private ListView mRssList;
private Cursor mCur;
private RssCursorAdapter mAdap;
private WebView mWebView;
private static final int ADD_ELEMENT_REQUEST = 1;
private Logger mLogger = Logger.getLogger(this.getPackageName());
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//
// Load screen layout.
setContentView(R.layout.main_screen2);
// Populate ArrayAdapter and bind it to ListView
mRssList = (ListView)findViewById(R.id.rssListView);
mRssList.setOnItemSelectedListener(this);
mWebView = (WebView)findViewById(R.id.rssWebView);
mCur = managedQuery(RssContentProvider.CONTENT_URI, // Query for all items.
null,
null,
RssContentProvider.DEFAULT_SORT_ORDER);
mAdap = new RssCursorAdapter(
this,
R.layout.list_element, // Our layout resource.
mCur,
new String[]{RssContentProvider.TITLE}, // Columns to retrieve.
new int[]{R.id.list_item}); // IDs of widgets to display
mRssList.setAdapter(mAdap); // the corresponding column.
// 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"));
}
}
//BEGIN_INCLUDE(5_4)
// Listener to listen for list selection changes, and send the new text to
// the web view.
public void onItemSelected(AdapterView parent, View v, int position, long id){
// Need to nest this in a try block because we get called sometimes
// with the index of a recently deleted item.
String content = "";
try{
content = mCur.getString(mCur.getColumnIndex(RssContentProvider.CONTENT));
mLogger.info("MyRssReader5 content string:" + content);
}
catch (Exception e){
// This method is sometimes called after a backing data item
// is deleted. In that case, we don't want to throw an error.
mLogger.warning("MyRssReader5.onItemSelected() couldn't get the content" +
"from the cursor " + e.getMessage());
}
mWebView.loadData(content, "text/html", null);
}
//END_INCLUDE(5_4)
public void onNothingSelected(AdapterView parent){
mWebView.loadData("<html><body><p>No selection chosen</p></body></html>", "text/html", null);
}
// 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
Intent basicStartIntent = new Intent(RssService.class);
startService(basicStartIntent);
break;
case 1: // Stop service
Intent stopIntent = new Intent(RssService.class);
stopService(stopIntent);
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()){
int currentSelectionIndex = mRssList.getSelectedItemIndex();
mLogger.info("MyRssReader5.onOptionsItemSelected(): Deleting list member:" +
mRssList.getSelectedItemIndex());
// Create our content URI by adding the ID of the currently selected item using a
// convenience method.
Long itemID = mAdap.getItemId(currentSelectionIndex);
getContentResolver().delete(RssContentProvider.CONTENT_URI.addId(itemID), null);
}
break;
case 4: // Requery all
Bundle startupVals = new Bundle(1);
startupVals.putBoolean(RssService.REQUERY_KEY, true);
Intent requeryIntent = new Intent(RssService.class);
startService(requeryIntent, startupVals);
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:
ContentValues vals = new ContentValues(5);
vals.put(RssContentProvider.TITLE, data.getStringExtra(RssContentProvider.TITLE));
vals.put(RssContentProvider.URL, data.getStringExtra(RssContentProvider.URL));
vals.put(RssContentProvider.CONTENT, data.getStringExtra(RssContentProvider.CONTENT));
vals.put(RssContentProvider.LAST_UPDATED, data.getIntExtra(RssContentProvider.LAST_UPDATED, 0));
Uri uri = getContentResolver().insert(
RssContentProvider.CONTENT_URI,
vals);
if(uri != null){
// Tell the service to requery the service, then set
// it as the active selection.
Bundle startupVals = new Bundle(1);
startupVals.putString(RssService.RSS_URL, data.getStringExtra("URL"));
Intent startIntent = new Intent(RssService.class);
startIntent.putExtras(startupVals);
startService(startIntent);
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 RssCursorAdapter extends SimpleCursorAdapter {
public RssCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
super(context, layout, c, from, to);
}
// Here's our only important override--returning the list item.
@Override
public View getView(int position, View convertView, ViewGroup parent){
TextView view = (TextView)super.getView(position, convertView, parent);
if(view != null){
// Now get the hasBeenRead value to determine the font.
int hasBeenReadColumnIndex = getCursor().getColumnIndex(RssContentProvider.HAS_BEEN_READ);
boolean hasBeenRead = (getCursor().getInt(hasBeenReadColumnIndex) == 1 ? true : false);
if(! hasBeenRead){
Typeface type = view.getTypeface();
view.setTypeface(Typeface.create(type, Typeface.BOLD_ITALIC));
}
}
return view;
}
}
}