团队项目-第一阶段冲刺-6

一、说在前面

1、昨天完成了：

1）历史记录的增删，展示。

2、今天完成了：

1）优化新闻详情界面（原来是用一个简单的textView控件来展示整个新闻文本，没有分段，换行等不美观！）现在改用webView展示新闻文本（实质是一个div）。

3、明天的计划：

1）实现用户对新闻评论的存储，和回显。

二、冲刺成果：

原来和现在对比：

 三、设计思路

1、根据从新闻列表中获取的新闻的url网址，获取到整个新闻的html代码。

2、使用jsoup解析这段html代码找出正文所在的div并使用webView来展示。

四、代码

1、更新后的ui界面

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".NewsActivity">

    <com.me.view.MyImageView
        android:id="@+id/iv_new_dg"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:scaleType="fitXY"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.05" />

    <ScrollView
        android:id="@+id/scrollView2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/iv_new_dg">

        <WebView
            android:id="@+id/wv_zw"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </ScrollView>

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0" >
        <RelativeLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <ListView
                android:id="@+id/comment_list"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="10dp"
                android:layout_marginBottom="50dp" />

            <LinearLayout
                android:id="@+id/rl_enroll"
                android:layout_width="match_parent"
                android:layout_height="60dp"
                android:orientation="horizontal"
                android:layout_alignParentBottom="true"
                android:background="#ffffff">

                <ImageView
                    android:id="@+id/comment"
                    android:layout_width="32dp"
                    android:layout_height="32dp"
                    android:src="@drawable/comment"
                    android:layout_weight="1"
                    android:layout_gravity="center" />

                <ImageView
                    android:id="@+id/chat"
                    android:layout_width="23dp"
                    android:layout_height="23dp"
                    android:src="@drawable/chat"
                    android:layout_weight="1"
                    android:layout_gravity="center"/>
            </LinearLayout>

            <RelativeLayout
                android:id="@+id/rl_comment"
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:background="#ffffff"
                android:visibility="gone"
                android:layout_alignParentBottom="true">

                <View
                    android:layout_width="match_parent"
                    android:layout_height="1dp"
                    android:background="#969696" />

                <TextView
                    android:id="@+id/hide_down"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="隐藏"
                    android:textSize="13sp"
                    android:textColor="#E91E63"
                    android:drawableBottom="@drawable/hide_dowm"
                    android:layout_alignParentLeft="true"
                    android:layout_centerVertical="true"
                    android:layout_marginLeft="10dp"/>
                <View
                    android:layout_width="1dp"
                    android:layout_height="match_parent"
                    android:background="#969696"
                    android:layout_toRightOf="@id/hide_down"
                    android:layout_marginLeft="10dp"/>
                <EditText
                    android:id="@+id/comment_content"
                    android:hint="评论"
                    android:textSize="15sp"
                    android:singleLine="true"
                    android:layout_width="240dp"
                    android:layout_height="match_parent"
                    android:background="@null"
                    android:layout_toRightOf="@id/hide_down"
                    android:layout_marginLeft="20dp"/>

                <Button
                    android:id="@+id/comment_send"
                    android:layout_width="50dp"
                    android:layout_height="35dp"
                    android:layout_margin="5dp"
                    android:text="发送"
                    android:textSize="13sp"
                    android:textColor="#ffffff"
                    android:background="#E91E63"
                    android:layout_alignParentRight="true"
                    android:layout_marginRight="10dp"
                    android:layout_marginLeft="15dp"/>
            </RelativeLayout>
        </RelativeLayout>
    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

2、发送url请求的工具类

package com.me.util;

import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

public class HttpUtil {
    /**
     * 返回json
     *
     * @param setUrl
     * @return
     */
    public static String setUrl(String setUrl) {
        try {
            URL url = new URL(setUrl);
            setUrl = URLEncoder.encode(setUrl, "utf-8");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            conn.setRequestMethod("GET");
//            conn.setRequestProperty("Accept-Encoding", "gzip, deflate, br");
            int responseCode = conn.getResponseCode();
            Log.e("web", responseCode + "aa");
            if (responseCode == HttpURLConnection.HTTP_OK) {
                InputStream inputStream = conn.getInputStream();
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
                BufferedReader reader = new BufferedReader(inputStreamReader);
                StringBuffer stringBuffer = new StringBuffer();
                String string = reader.readLine();
                while (string != null) {
                    stringBuffer.append(string);
                    string = reader.readLine();
                }
                Log.e("web", stringBuffer.toString());
                return stringBuffer.toString();
            } else {
                Log.e("web", responseCode + "aa");
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }

    public static String setUrlT(String setUrl) {
        try {
            URL url = new URL(setUrl);

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            conn.setRequestMethod("GET");
            InputStream inputStream = conn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader reader = new BufferedReader(inputStreamReader);
            StringBuffer stringBuffer = new StringBuffer();
            String string = reader.readLine();
            while (string != null) {
                stringBuffer.append(string);
                string = reader.readLine();
            }
            Log.e("web", stringBuffer.toString());
            return stringBuffer.toString();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }
}

3、相应的逻辑代码：

package com.me.news_2;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.me.adapter.AdapterComment;
import com.me.domain.Comment;
import com.me.domain.New_;
import com.me.domain.News;
import com.me.util.HttpUtil;
import com.me.util.JsoupNewsUtil;
import com.me.view.MyImageView;

import java.util.ArrayList;
import java.util.List;

public class NewsActivity extends AppCompatActivity implements View.OnClickListener{

    private MyImageView imageView;
    private WebView zw;
    private LinearLayout linearLayout;
    private ImageView comment;
    private ImageView chat;
    private TextView hide_down;
    private EditText comment_content;
    private Button comment_send;
    private SentUrlTask sentUrlTask;
    private SentUrlTask_ sentUrlTask_;
    private SentUrlTask_getComment sentUrlTask_getComment;
    private LinearLayout rl_enroll;
    private RelativeLayout rl_comment;

    private ListView comment_list;
    private AdapterComment adapterComment;
    private List<Comment> data;
    private New_ new_2 = new New_();
    private String html;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_news);
        initView();
        action();
    }

    private class SentUrlTask extends AsyncTask<Void,Void,String> {

        private  String url;

        public SentUrlTask(String url) {
            this.url = url;
        }

        @Override
        protected String doInBackground(Void... voids) {
            return HttpUtil.setUrlT(url);
        }

        @Override
        protected void onPostExecute(@NonNull String s) {
            super.onPostExecute(s);
            html = JsoupNewsUtil.zwHtml(s);
            zw.loadData(html,"text/html;charset=utf-8",null);
        }

    }


    public void initView(){
        imageView = findViewById(R.id.iv_new_dg);
        zw = findViewById(R.id.wv_zw);
        linearLayout = findViewById(R.id.linearLayout);
        // 初始化评论列表
        comment_list =  findViewById(R.id.comment_list);
        // 初始化数据
        if (data==null){
            data = new ArrayList<>();
        }
        // 初始化适配器
        adapterComment = new AdapterComment(getApplicationContext(), data);
        // 为评论列表设置适配器
        comment_list.setAdapter(adapterComment);

        comment = findViewById(R.id.comment);
        hide_down =  findViewById(R.id.hide_down);
        comment_content = findViewById(R.id.comment_content);
        comment_send = findViewById(R.id.comment_send);

        rl_enroll =  findViewById(R.id.rl_enroll);
        rl_comment =  findViewById(R.id.rl_comment);
        chat = findViewById(R.id.chat);
        setListener();
    }

    /**
     * 设置监听
     */
    public void setListener(){
        comment.setOnClickListener(this);
        hide_down.setOnClickListener(this);
        comment_send.setOnClickListener(this);
        chat.setOnClickListener(this);
    }


    public void action(){
        Intent intent = getIntent();
        String news = intent.getStringExtra("news");
        Gson gson = new Gson();
        New_ news1 = gson.fromJson(news, New_.class);
        new_2 = news1;
        getComment(new_2.getId());
        if(news1!=null){
            sentUrlTask = new SentUrlTask(news1.getUrl());
            sentUrlTask.execute();
            imageView.setImageURL(news1.getImgsrc());
        }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.comment:
                // 弹出输入法
                InputMethodManager imm = (InputMethodManager) getApplicationContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
                // 显示评论框
                rl_enroll.setVisibility(View.GONE);
                rl_comment.setVisibility(View.VISIBLE);
                break;
            case R.id.hide_down:
                // 隐藏评论框
                rl_enroll.setVisibility(View.VISIBLE);
                rl_comment.setVisibility(View.GONE);
                // 隐藏输入法，然后暂存当前输入框的内容，方便下次使用
                InputMethodManager im = (InputMethodManager)getApplicationContext().getSystemService(Context.INPUT_METHOD_SERVICE);
                im.hideSoftInputFromWindow(comment_content.getWindowToken(), 0);
                break;
            case R.id.comment_send:
                sendComment();
                break;
            case R.id.chat:
                if(View.GONE==comment_list.getVisibility()){
                    comment_list.setVisibility(View.VISIBLE);
//                    linearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,200));
                }else{
                    comment_list.setVisibility(View.GONE);
//                    linearLayout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,60));
                }

            default:
                break;
        }

    }
    /**
     * 发送评论
     */
    public void sendComment() {
        if (comment_content.getText().toString().equals("")) {
            Toast.makeText(getApplicationContext(), "评论不能为空！", Toast.LENGTH_SHORT).show();
        } else {
            sent("笑天",comment_content.getText().toString(),new_2.getId());
            // 生成评论数据

            Comment comment = new Comment();
            comment.setName("笑天" + "：");
            comment.setContent(comment_content.getText().toString());
            adapterComment.addComment(comment);
            // 发送完，清空输入框
            comment_content.setText("");

            Toast.makeText(getApplicationContext(), "评论成功！", Toast.LENGTH_SHORT).show();
        }
    }

    public void sent(String name,String content,int nid){
        sentUrlTask_ = new SentUrlTask_("http://192.168.1.17:8080/NewsApi/news?method=addComment&name="+name+"&content="+content+"&nid="+nid);
//        sentUrlTask = new ListFragment.SentUrlTask("http://192.168.43.243:8080/NewsApi/news?method=allnews");
        sentUrlTask_.execute();
    }
    public void getComment(int nid){
        sentUrlTask_getComment = new SentUrlTask_getComment("http://192.168.1.17:8080/NewsApi/news?method=commentList&nid="+nid);
//        sentUrlTask = new ListFragment.SentUrlTask("http://192.168.43.243:8080/NewsApi/news?method=allnews");
        sentUrlTask_getComment.execute();
    }

    private class SentUrlTask_ extends AsyncTask<Void,Void,String> {

        private  String url;

        public SentUrlTask_(String url) {
            this.url = url;
        }

        @Override
        protected String doInBackground(Void... voids) {
            return HttpUtil.setUrl(url);
        }

        @Override
        protected void onPostExecute(@NonNull String s) {
            super.onPostExecute(s);
//            zw.loadData(html,"text/html;charset=utf-8",null);
        }
    }
    private class SentUrlTask_getComment extends AsyncTask<Void,Void,String> {

        private  String url;

        public SentUrlTask_getComment(String url) {
            this.url = url;
        }

        @Override
        protected String doInBackground(Void... voids) {
            return HttpUtil.setUrl(url);
        }

        @Override
        protected void onPostExecute(@NonNull String s) {
            super.onPostExecute(s);
//            zw.loadData(html,"text/html;charset=utf-8",null);
            Gson gson = new Gson();
//            Toast.makeText(getApplicationContext(), s, Toast.LENGTH_SHORT).show();
            if(!s.equals("")){
                data = gson.fromJson(s,new TypeToken<List<Comment>>(){}.getType());
                adapterComment.setData(data);
            }

        }
    }
}