1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.example.android.newsreader;
18
19import android.content.res.Configuration;
20import android.os.Bundle;
21import android.support.v4.app.FragmentActivity;
22
23/**
24 * Activity that displays a particular news article onscreen.
25 *
26 * This activity is started only when the screen is not large enough for a two-pane layout, in
27 * which case this separate activity is shown in order to display the news article. This activity
28 * kills itself if the display is reconfigured into a shape that allows a two-pane layout, since
29 * in that case the news article will be displayed by the {@link NewsReaderActivity} and this
30 * Activity therefore becomes unnecessary.
31 */
32public class ArticleActivity extends FragmentActivity {
33    // The news category index and the article index for the article we are to display
34    int mCatIndex, mArtIndex;
35
36    /**
37     * Sets up the activity.
38     *
39     * Setting up the activity means reading the category/article index from the Intent that
40     * fired this Activity and loading it onto the UI. We also detect if there has been a
41     * screen configuration change (in particular, a rotation) that makes this activity
42     * unnecessary, in which case we do the honorable thing and get out of the way.
43     */
44    @Override
45    protected void onCreate(Bundle savedInstanceState) {
46        super.onCreate(savedInstanceState);
47        mCatIndex = getIntent().getExtras().getInt("catIndex", 0);
48        mArtIndex = getIntent().getExtras().getInt("artIndex", 0);
49
50        // If we are in two-pane layout mode, this activity is no longer necessary
51        if (getResources().getBoolean(R.bool.has_two_panes)) {
52            finish();
53            return;
54        }
55
56        // Place an ArticleFragment as our content pane
57        ArticleFragment f = new ArticleFragment();
58        getSupportFragmentManager().beginTransaction().add(android.R.id.content, f).commit();
59
60        // Display the correct news article on the fragment
61        NewsArticle article = NewsSource.getInstance().getCategory(mCatIndex).getArticle(mArtIndex);
62        f.displayArticle(article);
63    }
64}
65