新闻客户端

来源：互联网发布：苹果5s怎么用4g网络编辑：程序博客网时间：2024/05/17 04:25
实现结果
新建的各界面
代码如下：activity_main.xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="cn.edu.bzu.news.MainActivity">    <FrameLayout        android:layout_width="match_parent"        android:layout_height="match_parent">        <LinearLayout            android:id="@+id/loading"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:gravity="center"            android:orientation="vertical"            android:visibility="invisible">            <ProgressBar                android:layout_width="wrap_content"                android:layout_height="wrap_content" />            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="正在加载信息..." />        </LinearLayout>        <ListView            android:id="@+id/lv_news"            android:layout_width="match_parent"            android:layout_height="match_parent" />    </FrameLayout></RelativeLayout>news_item.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="65dp">    <com.loopj.android.image.SmartImageView        android:id="@+id/siv_icon"        android:layout_width="80dp"        android:layout_height="60dp"        android:scaleType="centerCrop"        android:src="@mipmap/ic_launcher"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"/>    <TextView        android:id="@+id/tv_title"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="5dp"        android:layout_marginTop="10dp"        android:layout_toRightOf="@id/siv_icon"        android:ellipsize="end"        android:maxLength="20"        android:singleLine="true"        android:text="我是标题"        android:textColor="#000000"        android:textSize="18sp" />    <TextView        android:id="@+id/tv_description"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@id/tv_title"        android:layout_marginLeft="5dp"        android:layout_marginTop="5dp"        android:layout_toRightOf="@id/siv_icon"        android:ellipsize="end"        android:maxLength="16"        android:maxLines="1"        android:text="我是描述"        android:textColor="#99000000"        android:textSize="14sp" />    <TextView        android:id="@+id/tv_type"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_alignParentRight="true"        android:layout_marginBottom="5dp"        android:layout_marginRight="10dp"        android:text="评论"        android:textColor="#99000000"        android:textSize="12sp" /></RelativeLayout>MainActivitypackage cn.edu.bzu.anew;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.Toast;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.AsyncHttpResponseHandler;import java.io.UnsupportedEncodingException;import java.util.List;import cn.edu.bzu.anew.Tools.JsonParse;import cn.edu.bzu.anew.adapter.NewsAdapter;import cn.edu.bzu.anew.entity.NewsInfo;public class MainActivity extends AppCompatActivity {    private ListView lvNews;    private List<NewsInfo>  newsInfos;    private LinearLayout loading;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lvNews=(ListView)findViewById(R.id.lv_news);        loading=(LinearLayout)findViewById(R.id.loading);        fillData();    }    private  void  fillData(){        AsyncHttpClient client =new  AsyncHttpClient();        client.get("http://10.3.24.161:8080/NewsInfo.json",new AsyncHttpResponseHandler(){            @Override            public void onSuccess(int i, org.apache.http.Header[] headers, byte[] bytes) {                try{                    String json=new String(bytes,"utf-8");                    newsInfos= JsonParse.getNewsInfo(json);                    if(newsInfos==null){                        Toast.makeText(MainActivity.this,"解析失败", Toast.LENGTH_LONG).show();                    }else{                        loading .setVisibility(View.INVISIBLE);                        lvNews.setAdapter(new NewsAdapter(MainActivity.this,newsInfos));                    }                } catch (UnsupportedEncodingException e) {                    e.printStackTrace();                }            }            @Override            public void onFailure(int i, org.apache.http.Header[] headers, byte[] bytes, Throwable throwable) {            }        } );    }}NewsAdapterpackage cn.edu.bzu.anew.adapter;import android.content.Context;import android.support.annotation.NonNull;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.TextView;import com.loopj.android.image.SmartImageView;import java.util.List;import cn.edu.bzu.anew.R;import cn.edu.bzu.anew.entity.NewsInfo;public class NewsAdapter extends ArrayAdapter<NewsInfo>{    public NewsAdapter(Context context, List<NewsInfo> objects) {        super(context, R.layout.news_item, objects);    }    @NonNull    @Override    public View getView(int position, View convertView, ViewGroup parent) {        NewsInfo newsinfo= getItem(position);        View view=null;        viewHolder viewHolder;        if(convertView==null){            view=LayoutInflater.from(getContext()).inflate(R.layout.news_item,null);            viewHolder=new viewHolder();            viewHolder.siv= (SmartImageView) view.findViewById(R.id.siv_icon);            viewHolder.tv_title= (TextView) view.findViewById(R.id.tv_title);            viewHolder.tv_description= (TextView) view.findViewById(R.id.tv_description);            viewHolder.tv_type= (TextView) view.findViewById(R.id.tv_type);            view.setTag(viewHolder);        }else{            view=convertView;            viewHolder=(viewHolder) view.getTag();        }        viewHolder.siv.setImageUrl(newsinfo.getIcon());        viewHolder.tv_title.setText(newsinfo.getTitle());        viewHolder.tv_description.setText(newsinfo.getDescription());        viewHolder.tv_type.setText(newsinfo.getType()+"");        return view;    }    class viewHolder{        TextView tv_title;        TextView tv_description;        TextView  tv_type;        SmartImageView siv;    }}NewsInfopackage cn.edu.bzu.anew.entity;public class NewsInfo {    private  String icon;    private  String title;    private  String description;    private  int type;    private  long comment;    public NewsInfo(String icon, String title, String description, int type, long comment) {        this.icon = icon;        this.title = title;        this.description = description;        this.type = type;        this.comment = comment;    }    public String getIcon() {        return icon;    }    public void setIcon(String icon) {        this.icon = icon;    }    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public String getDescription() {        return description;    }    public void setDescription(String description) {        this.description = description;    }    public int getType() {        return type;    }    public void setType(int type) {        this.type = type;    }    public long getComment() {        return comment;    }    public void setComment(long comment) {        this.comment = comment;    }}
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