Android爬虫更新UI界面

Android爬虫详细代码加具体解释如下：

package com.example.pachong;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {
    
    

    Handler handler;

    TextView textView;


    private void clic(){
    
    
        //使用handler进行更新视图
        handler = new Handler() {
    
    
            @Override
            public void handleMessage(Message msg) {
    
    
                super.handleMessage(msg);
                Bundle bundle = msg.getData();//将msg转换为数据类型
                String color = bundle.getString("color");//msg可能有多个，这是为了获取特定关键词所对应的数据
                textView.setText(color);//赋值

            }
        };


        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
    
    
            @Override
            public void onClick(View v) {
    
    
                new Thread(new Runnable() {
    
    
                    @Override
                    public void run() {
    
    

                        Document doc = null;
                        try {
    
    
                             doc = Jsoup.connect("https://www.baidu.com/").get();
                        } catch (IOException e) {
    
    
                            e.printStackTrace();
                        }

                        Message msg = new Message();
                        Bundle bundle = new Bundle();
                        bundle.putString("color", doc.html());//爬取网页，并将网页数据赋值给bundle
                        msg.setData(bundle);//将数据赋值给msg，以便后续处理数据
                        handler.sendMessage(msg);//将msg传递handler来处理
                    }
                }).start();
            }
        });
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView=findViewById(R.id.text);
        clic();

}}