MainActivity.java
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
News.java
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;
}
}
NewsContentActivity.java
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class NewsContentActivity extends AppCompatActivity {
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);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.news_content);
String newsTitle = getIntent().getStringExtra("news_title");
String newsContent = getIntent().getStringExtra("news_content");
NewsContentFragment newsContentFragment = (NewsContentFragment)
getSupportFragmentManager().findFragmentById(R.id.news_content_fragment);
newsContentFragment.refresh(newsTitle,newsContent);
}
}
NewsContentFragment.java
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import org.w3c.dom.Text;
/**
* Created by 13178 on 2018-6-14.
*/
public class NewsContentFragment extends Fragment {
private View view;
@Override
public 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);
}
}
NewsTitleFragment.java
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
/**
* Created by 13178 on 2018-6-14.
*/
public class NewsTitleFragment extends Fragment {
private boolean isTwoPace;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState){
View view = inflater.inflate(R.layout.news_title_frag,container,false);
RecyclerView newsTitleRecyclerView = (RecyclerView) view.findViewById(R.id.news_title_recycler_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
newsTitleRecyclerView.setLayoutManager(layoutManager);
NewsAdapter adapter = new NewsAdapter(getNews());
newsTitleRecyclerView.setAdapter(adapter);
return view;
}
private List<News> getNews() {
List<News> newsList = new ArrayList<>();
for(int i = 0 ;i<50;i++){
News news = new News();
news.setTitle("这是第新闻标题"+i);
news.setContent(getRandomLengthContent("这是第新闻"+ i +". "));
newsList.add(news);
}
return newsList;
}
private String getRandomLengthContent(String s) {
Random random = new Random();
int length = random.nextInt(20)+1;
StringBuilder builder = new StringBuilder();
for(int i=0;i<length;i++){
builder.append(s);
}
return builder.toString();
}
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
if(getActivity().findViewById(R.id.news_content_layout)!=null) {
isTwoPace = true;
}else{
isTwoPace = false;
}
}
class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder>{
private List<News> mNewsList;
class ViewHolder extends RecyclerView.ViewHolder{
TextView newsTitleText;
public ViewHolder(View itemView) {
super(itemView);
newsTitleText= (TextView) itemView.findViewById(R.id.news_title);
}
}
public NewsAdapter(List<News> newsList){
mNewsList = newsList;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.news_item,parent,false);
final ViewHolder holder = new ViewHolder(view);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
News news = mNewsList.get(holder.getAdapterPosition());
if(isTwoPace){
NewsContentFragment newsContentFragment = (NewsContentFragment)
getFragmentManager().findFragmentById(R.id.news_content_fragment);
newsContentFragment.refresh(news.getTitle(),news.getContent());
}else{
NewsContentActivity.actionStart(getActivity(),news.getTitle(),news.getContent());
}
}
});
return holder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
News news = mNewsList.get(position);
holder.newsTitleText.setText(news.getTitle());
}
@Override
public int getItemCount() {
return mNewsList.size();
}
}
}
activity_main.xml中
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/news_title_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/news_title_fragment"
android:name="com.ldxiaofeng.android.fragmentpractice.NewsTitleFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
news_content.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/news_content_fragment"
android:name="com.ldxiaofeng.android.fragmentpractice.NewsContentFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
news_content_frag.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/visibility_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:visibility="invisible">
<TextView
android:id="@+id/news_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:padding="10dp"
android:textSize="20sp"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#000"/>
<TextView
android:id="@+id/news_content"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:padding="15sp"
android:textSize="18sp"/>
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:background="#000"/>
</RelativeLayout>
news_item.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/news_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLines="1"
android:ellipsize="end"
android:textSize="18sp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingBottom="15dp"
android:paddingTop="15dp"/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#000"/>
</RelativeLayout>
news_title_frag.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/news_title_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>