《移动云计算编程》实验四.docx

成都工业学院计算机工程学院移动云计算编程技术实验报告实验名称实验四 制作一个简易版的新闻应用实验时间2016.4.14学生姓名王亮班级1305022学号32指导教师杨雅志批阅教师成绩一、实验目的回顾前面所学的Fragment知识，通过这个这个实验来做到灵活运用Fragment知识。二、实验要求熟悉Fragment的生命周期。了解当前Activtity怎么根据当前屏幕的大小来加载不同的布局文件。三、实验原理Android中根据屏幕大小的不同来加载不同的布局文件四、实验过程1.创建工程a)Projectname：fragmentpracticeb)Packagename：com.example.fragmentpracticec)Activityname：MainActivityd)Applicationname：fragmentpracticee)MinSDKVersion：32编辑布局文件在res目录下新建一个/fragmentpractice/res/layout-sw600dp目录在该目录下新建一个activity_main.xml布局文件在layout目录下新建一个同名的activity_main.xml布局文件新建一个News类package com.example.fragmentpractice;public class News private String title;private String content;public String getTitle() return title;public void setTitle(String title) this.title = title;public String getContent() return content;public void setContent(String content) this.content = content;新建一个NewsAdapter类package com.example.fragmentpractice;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.TextView;public class NewsAdapter extends ArrayAdapter private int resourceId;public NewsAdapter(Context context, int textViewResourceId, List objects) super(context, textViewResourceId, objects);resourceId = textViewResourceId;Overridepublic View getView(int position, View convertView, ViewGroup parent) News news = getItem(position);View view;if (convertView = null) view = LayoutInflater.from(getContext().inflate(resourceId, null); else view = convertView;TextView newsTitleText = (TextView) view.findViewById(R.id.news_title);newsTitleText.setText(news.getTitle();return view;新建一个NewsContentActivity类package com.example.fragmentpractice;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.view.Window;public class NewsContentActivity extends Activity public static void actionStart(Context context, String newsTitle,String newsContent) Intent intent = new Intent(context, NewsContentActivity.class);intent.putExtra(news_title, newsTitle);intent.putExtra(news_content, newsContent);context.startActivity(intent);Overrideprotected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.news_content);String newsTitle = getIntent().getStringExtra(news_title);String newsContent = getIntent().getStringExtra(news_content);NewsContentFragment newsContentFragment = (NewsContentFragment) getFragmentManager().findFragmentById(R.id.news_content_fragment);newsContentFragment.refresh(newsTitle, newsContent);新建NewsContentFragment类package com.example.fragmentpractice;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class NewsContentFragment extends Fragment private View view;Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) view = inflater.inflate(R.layout.news_content_frag, container, false);return view;public void refresh(String newsTitle, String newsContent) View visibilityLayout = view.findViewById(R.id.visibility_layout);visibilityLayout.setVisibility(View.VISIBLE);TextView newsTitleText = (TextView) view.findViewById(R.id.news_title);TextView newsContentText = (TextView) view.findViewById(R.id.news_content);newsTitleText.setText(newsTitle);newsContentText.setText(newsContent);新建NewsTitleFragment类package com.example.fragmentpractice;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;public class NewsTitleFragment extends Fragment implements OnItemClickListener private ListView newsTitleListView;private List newsList;private NewsAdapter adapter;private boolean isTwoPane;Overridepublic void onAttach(Activity activity) super.onAttach(activity);newsList = getNews();adapter = new NewsAdapter(activity, R.layout.news_item, newsList);Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) View view = inflater.inflate(R.layout.news_title_frag, container, false);newsTitleListView = (ListView) view.findViewById(R.id.news_title_list_view);newsTitleListView.setAdapter(adapter);newsTitleListView.setOnItemClickListener(this);return view;Overridepublic void onActivityCreated(Bundle savedInstanceState) super.onActivityCreated(savedInstanceState);if (getActivity().findViewById(R.id.news_content_layout) != null) isTwoPane = true; else isTwoPane = false;Overridepublic void onItemClick(AdapterView parent, View view, int position,long id) News news = newsList.get(position);if (isTwoPane) NewsContentFragment newsContentFragment = (NewsContentFragment) getFragmentManager().findFragmentById(R.id.news_content_fragment);newsContentFragment.refresh(news.getTitle(), news.getContent(); else NewsContentActivity.actionStart(getActivity(), news.getTitle(),news.getContent();private List getNews() List newsList = new ArrayList();News news1 = new News();news1.setTitle(Succeed in College as a Learning Disabled Student);news1.setContent