Android(安卓)新闻显示界面且适应平板

界面

1.activity_main.xml

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/news_title_layout">    <fragment        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/news_title_fragment"        android:name="com.example.ken.fragmentbestpractice.NewsTitleFragment"/>FrameLayout>

2.平板模式下的activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:orientation="horizontal"    android:layout_width="match_parent"    android:layout_height="match_parent">    <fragment        android:layout_width="0dp"        android:layout_weight="1"        android:layout_height="match_parent"        android:name="com.example.ken.fragmentbestpractice.NewsTitleFragment"        android:id="@+id/news_title_fragment" />    <FrameLayout        android:layout_width="0dp"        android:layout_height="match_parent"        android:id="@+id/news_content_layout"        android:layout_weight="3">        <fragment            android:layout_width="match_parent"            android:layout_height="match_parent"            android:id="@+id/news_content_fragment"            android:name="com.example.ken.fragmentbestpractice.NewsContentFragment"/>    FrameLayout>LinearLayout>

3.news_item.xml

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:id="@+id/news_title"    android:singleLine="true"    android:ellipsize="end"    android:textSize="18sp"    android:paddingLeft="10dp"    android:paddingRight="10dp"    android:paddingTop="15dp"    android:paddingBottom="15dp"    />

4.news_title_frag.xml

<?xml version="1.0" encoding="utf-8"?><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:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/news_title_recycler_view"/>LinearLayout>

5.news_content.xml

<?xml version="1.0" encoding="utf-8"?><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:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/news_content_fragment"        android:name="com.example.ken.fragmentbestpractice.NewsContentFragment"/>LinearLayout>

6.news_content_frag.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/visibility_layout"        android:orientation="vertical"        android:visibility="invisible">        <TextView            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:id="@+id/news_title"            android:gravity="center"            android:padding="10dp"            android:textSize="20sp"/>        <View            android:layout_width="match_parent"            android:layout_height="1dp"            android:background="#000" />        <TextView            android:layout_width="match_parent"            android:layout_height="0dp"            android:layout_weight="1"            android:id="@+id/news_content"            android:padding="15dp"            android:textSize="18sp"/>    LinearLayout>    <View        android:layout_width="1dp"        android:layout_height="match_parent"        android:layout_alignParentLeft="true"        android:background="#000" />RelativeLayout>

JAVA

1.MainActivity.java

package com.example.ken.fragmentbestpractice;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);    }}

2.News.java

package com.example.ken.fragmentbestpractice;public class News {    private String title;    private String content;    public String getTitle() {        return title;    }    public String getContent() {        return content;    }    public void setTitle(String title){        this.title = title;    }    public void setContent(String content) {        this.content = content;    }}

3.NewsContentActivity.java

package com.example.ken.fragmentbestpractice;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);    }}

4.NewsContentFrag.java

package com.example.ken.fragmentbestpractice;import android.os.Bundle;import android.support.annotation.NonNull;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class NewsContentFragment extends Fragment {    private View view;    @Nullable    @Override    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        view = inflater.inflate(R.layout.news_content_frag, container, false);        return view;    }    public void refresh(String newsTitle, String newsContent){        View visibilityLayoyt = view.findViewById(R.id.visibility_layout);        visibilityLayoyt.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);    }}

5.NewsTitleFragment.java

package com.example.ken.fragmentbestpractice;import android.os.Bundle;import android.support.annotation.NonNull;import android.support.annotation.Nullable;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.LinearLayout;import android.widget.TextView;import java.util.ArrayList;import java.util.List;import java.util.Random;public class NewsTitleFragment extends Fragment {    private boolean isTwoPane;    @Nullable    @Override    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable 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 getNews(){        List newsList = new ArrayList<>();        for (int i =0; i<=50; i++){            News news = new News();            news.setTitle("This is news title " + i);            news.setContent(getRandomLengthContent("This is news content" + i));            newsList.add(news);        }        return newsList;    }    private String getRandomLengthContent(String content){        Random random = new Random();        int length = random.nextInt(20) + 1;        StringBuilder builder = new StringBuilder();        for (int i = 0; i<=length;i++){            builder.append(content);        }        return builder.toString();    }    @Override    public void onActivityCreated(@Nullable Bundle savedInstanceState) {        super.onActivityCreated(savedInstanceState);        if (getActivity().findViewById(R.id.news_content_layout) != null){            isTwoPane = true;        }else{            isTwoPane = false;        }    }    class NewsAdapter extends RecyclerView.Adapter{        private List mNewsList;        class ViewHolder extends RecyclerView.ViewHolder{            TextView newsTitleText;            public ViewHolder(View view){                super(view);                newsTitleText = (TextView) view.findViewById(R.id.news_title);            }        }        public NewsAdapter(List newsList){            mNewsList = newsList;        }        @NonNull        @Override        public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {            View view = LayoutInflater.from(viewGroup.getContext())                    .inflate(R.layout.news_item, viewGroup,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(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());                    }                }            });            return holder;        }        @Override        public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {            News news = mNewsList.get(i);            viewHolder.newsTitleText.setText(news.getTitle());        }        @Override        public int getItemCount() {            return mNewsList.size();        }    }}

手机的实现效果是这样的：

转载于:https://www.cnblogs.com/KEN-zj/p/9286051.html

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