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/* * Copyright 2013 The Android Open Source Project */*from w ww .j a v a 2 s .c o m*/ * 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.xyzreader.cpfinal; import android.content.Intent; import android.content.res.Configuration; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import com.example.xyzreader.cpfinal.dummy.DummyContent; /** * An activity representing a list of Articles. This activity has different * presentations for handset and tablet-size devices. On handsets, the activity * presents a list of items, which when touched, lead to a * {@link ArticleDetailActivity} representing item details. On tablets, the * activity presents the list of items and item details side-by-side using two * vertical panes. * <p/> * The activity makes heavy use of fragments. The list of items is a * {@link ArticleListFragment} and the item details (if present) is a * {@link ArticleDetailFragment}. * <p/> * This activity also implements the required * {@link ArticleListFragment.Callbacks} interface to listen for item * selections. */ public class ArticleListActivity extends ActionBarActivity implements ArticleListFragment.Callbacks { /** * Whether or not the activity is in two-pane mode, i.e. running on a tablet * device. */ private boolean mTwoPane; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_article_list); if (findViewById(R.id.article_detail_container) != null) { // The detail container view will be present only in the // large-screen layouts (res/values-large and // res/values-sw600dp). If this view is present, then the // activity should be in two-pane mode. mTwoPane = true; // In two-pane mode, list items should be given the // 'activated' state when touched. ((ArticleListFragment) getSupportFragmentManager() .findFragmentById(R.id.article_list)) .setActivateOnItemClick(true); } if (savedInstanceState == null && mTwoPane) { Bundle arguments = new Bundle(); arguments.putString(ArticleDetailFragment.ARG_ITEM_ID, DummyContent.ITEMS.get(0).id); ArticleDetailFragment fragment = new ArticleDetailFragment(); fragment.setArguments(arguments); getSupportFragmentManager().beginTransaction() .replace(R.id.article_detail_container, fragment).commit(); } } /** * Callback method from {@link ArticleListFragment.Callbacks} indicating * that the item with the given ID was selected. */ @Override public void onItemSelected(String id) { if (mTwoPane) { // In two-pane mode, show the detail view in this activity by // adding or replacing the detail fragment using a // fragment transaction. Bundle arguments = new Bundle(); arguments.putString(ArticleDetailFragment.ARG_ITEM_ID, id); ArticleDetailFragment fragment = new ArticleDetailFragment(); fragment.setArguments(arguments); getSupportFragmentManager().beginTransaction() .replace(R.id.article_detail_container, fragment).commit(); } else { // In single-pane mode, simply start the detail activity // for the selected item ID. Intent detailIntent = new Intent(this, ArticleDetailActivity.class); detailIntent.putExtra(ArticleDetailFragment.ARG_ITEM_ID, id); startActivity(detailIntent); } } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); } }