新闻案例

最新推荐文章于 2025-08-12 18:00:54 发布

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最新推荐文章于 2025-08-12 18:00:54 发布

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文章标签： android 新闻应用

本文链接：https://blog.youkuaiyun.com/qq_37738170/article/details/72842279

本文介绍了一个简单的新闻应用开发实例，包括应用结构、Activity配置、数据加载和服务交互等内容。该应用利用AsyncHttpClient进行网络请求，并使用XML解析技术处理数据。

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.edu.bzu.news">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity><!-- ATTENTION: This was auto-generated to add Google Play services to your project for
     App Indexing.  See https://g.co/AppIndexing/AndroidStudio for more information. -->
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
    </application>

</manifest>

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package cn.edu.bzu.news;

import android.graphics.Color;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.appindexing.Thing;
import com.google.android.gms.common.api.GoogleApiClient;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestHandle;
import com.loopj.android.image.SmartImageView;

import org.apache.http.Header;

import java.io.ByteArrayInputStream;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private ListView lv_news;
    private LinearLayout loading;
    private List<NewsInfo> newsInfos;
    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    private GoogleApiClient client;

    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    public Action getIndexApiAction() {
        Thing object = new Thing.Builder()
                .setName("Main Page") // TODO: Define a title for the content shown.
                // TODO: Make sure this auto-generated URL is correct.
                .setUrl(Uri.parse("http://[ENTER-YOUR-URL-HERE]"))
                .build();
        return new Action.Builder(Action.TYPE_VIEW)
                .setObject(object)
                .setActionStatus(Action.STATUS_TYPE_COMPLETED)
                .build();
    }

    @Override
    public void onStart() {
        super.onStart();

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client.connect();
        AppIndex.AppIndexApi.start(client, getIndexApiAction());
    }

    @Override
    public void onStop() {
        super.onStop();

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        AppIndex.AppIndexApi.end(client, getIndexApiAction());
        client.disconnect();
    }

    private class NewsAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            return newsInfos.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View view = View.inflate(MainActivity.this, R.layout.news_item, null);
            SmartImageView siv = (SmartImageView) view.findViewById(R.id.siv_icon);
            TextView tv_title = (TextView) view.findViewById(R.id.tv_title);
            TextView tv_description = (TextView) view.findViewById(R.id.tv_description);
            TextView tv_type = (TextView) view.findViewById(R.id.tv_type);
            NewsInfo newsInfo = newsInfos.get(position);
            siv.setImageUrl(newsInfo.getIconPath(), R.drawable.ab, R.drawable.ic_launcher);
            tv_title.setText(newsInfo.getTitle());
            tv_description.setText(newsInfo.getdescroption());
            int type = newsInfo.gettype();
            switch (type) {
                case 1:
                    tv_type.setText("评论：" + newsInfo.getComment());
                    break;
                case 2:
                    tv_type.setTextColor(Color.RED);
                    tv_type.setText("专题：");
                    break;
                case 3:
                    tv_type.setTextColor(Color.BLUE);
                    tv_type.setText("LIVE");
                    break;
            }
            return view;
        }
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv_news = (ListView) findViewById(R.id.lv_news);
        loading = (LinearLayout) findViewById(R.id.loading);
        fillData2();
        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
    }

    private void fillData2() {
        AsyncHttpClient asynHttpClient = new AsyncHttpClient();
        RequestHandle requestHandle = asynHttpClient.get(getString(R.string.serverurl), new AsyncHttpResponseHandler() {
            public void onSuccess(String Content) {

                byte[] bytes = Content.getBytes();
                ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
                newsInfos = NewsInfoService.getNewsInfos(bais);
                if (newsInfos == null) {
                    Toast.makeText(MainActivity.this, "解析失败",Toast.LENGTH_LONG).show();
                } else {
                    loading.setVisibility(View.INVISIBLE);
                    lv_news.setAdapter(new NewsAdapter());
                }
            }

            @Override
            public void onSuccess(int i, Header[] headers, byte[] bytes) {

            }

            @Override
            public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {
                int error;
                Header[] content;
                Toast.makeText(MainActivity.this, "请求失败", Toast.LENGTH_LONG).show();
            }
        });
    }
}

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package cn.edu.bzu.news;

import android.widget.TextView;

/**
 * Created by 牵爱看海 on 2017/5/30.
 */
public class NewsInfo {
    private String iconPath;
    private String title;
    private String description;
    private int type;
    private long comment;

    public String getIconPath() {
        return iconPath;
    }

    public void setIconPath(String iconPath) {
        this.iconPath = iconPath;
    }

    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;
    }

    public int  getdescroption() {
        this.description = description;
        return 0;
    }

    public int gettype() {
        this.type=type;
        return 0;
    }
}

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package cn.edu.bzu.news;

import android.util.Xml;

import org.xmlpull.v1.XmlPullParser;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by 牵爱看海 on 2017/5/30.
 */
public class NewsInfoService {
    public static List<NewsInfo> getNewsInfos(InputStream is) {
        XmlPullParser parser = Xml.newPullParser();
        try {
            parser.setInput(is,"utf-8");
            int type =parser.getEventType();
            List<NewsInfo> newsInfos=null;
            NewsInfo newsInfo=null;
            while (type!=XmlPullParser.END_DOCUMENT){
                switch (type){
                    case XmlPullParser.START_TAG:
                        if("news".equals(parser.getName())){
                            newsInfo= new NewsInfo();
                        }else if("newsInfo".equals(parser.getName())){
                            newsInfo=new NewsInfo();
                        }else if("icon".equals(parser.getName())){
                            String icon=parser.nextText();
                            newsInfo.setIconPath(icon);
                        }else  if("title".equals(parser.getName())){
                            String title=parser.nextText();
                            newsInfo.setTitle(title);
                        }else if("content".equals(parser.getName())){
                            String decription=parser.nextText();
                            newsInfo.setDescription(decription);

                        }else if("type".equals(parser.getName())){
                            String newstype=parser.nextText();
                            newsInfo.setType(Integer.parseInt(newstype));
                        }else if("comment".equals(parser.getName())){
                            String comment = parser.nextText();
                            newsInfo.setComment(Long.parseLong(comment));
                        }
                        break;
                    case XmlPullParser.END_TAG:
                        if ("newsInfo".equals(parser.getName())){
                            newsInfos.add(newsInfo);
                            newsInfo=null;
                        }
                        break;
                }
                type=parser.next();
            }
            return newsInfos;

        } catch (Exception e) {
            e.printStackTrace();
        }


        return null;
    }
}

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package cn.edu.bzu.news;

import android.content.Context;
import android.support.test.InstrumentationRegistry;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

/**
 * Instrumentation test, which will execute on an Android device.
 *
 * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
 */
@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
    @Test
    public void useAppContext() throws Exception {
        // Context of the app under test.
        Context appContext = InstrumentationRegistry.getTargetContext();

        assertEquals("cn.edu.bzu.news", appContext.getPackageName());
    }
}

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<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <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>
</LinearLayout>

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<?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"></com.loopj.android.image.SmartImageView>
    <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_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_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>

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<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">
    <newsInfo>
        <icon>http://172.16.25.13:8080/img/a.jpg</icon>
        <title>科技温暖世界</title>
        <content>进入一个更有爱的领域</content>
        <type>1</type>
    </newsInfo>
    <newsInfo>
        <icon>http://172.16.25.13:8080/img/a.jpg</icon>
        <title>《神武》</title>
        <content>新美术资源盘点，视觉新体验</content>
        <type>2</type>
        <comment>35</comment>
    </newsInfo>
    <newsInfo>
        <icon>http://172.16.25.13:8080/img/a.jpg</icon>
        <title>南北车正式公布合并</title>
        <content>南北车将于今日正式公布合并</content>
        <type>3</type>
        <comment>2</comment>
    </newsInfo>
    <newsInfo>
        <icon>http://172.16.25.13:8080/img/a.jpg</icon>
        <title>北京拟推医生电子注册</title>
        <content>突破多点执业“限制”</content>
        <type>1</type>
        <comment>25</comment>
    </newsInfo>
    <newsInfo>
        <icon>http://172.16.25.13:8080/img/a.jpg</icon>
        <title>风力发电进校园</title>
        <content>风力发电普进校园</content>
        <type>2</type>
        <comment>26</comment>
    </newsInfo>
    <newsInfo>
        <icon>http://172.16.25.13:8080/img/a.jpg</icon>
        <title>地球一小时</title>
        <content>地球熄灯一小时</content>
        <type>1</type>
        <comment>23</comment>
    </newsInfo>
</LinearLayout>

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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B6</color>
    <color name="colorPrimaryDark">#393E9E</color>
    <color name="colorAccent">#FF40</color>
</resources>

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<resources>
    <string name="app_name">News</string>
    <string name="serverurl" />
</resources>

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<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>