Android获取网络上的网页代码

╰+攻爆jí腚メ 2022-08-05 13:14 174阅读 0赞

public void showhtml(View v) {
            String path = pathText.getText().toString();
            try {
                String html = HtmlService.getHtml(path);
                textView.setText(html);
            } catch (Exception e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), R.string.error, Toast.LENGTH_LONG).show();
            }
        }

以下是编写的HTMLService网页代码的业务类

package com.zhoujn.internet.service;
    
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    
    import com.wangjialin.internet.utils.StreamTool;
    
    public class HtmlService {
        
        /**
         * 获取网页源码
         * @param path 网页路径
         * @return
         */
        public static String getHtml(String path) throws Exception {
            HttpURLConnection conn = (HttpURLConnection)new URL(path).openConnection();
            conn.setConnectTimeout(5000);
            conn.setRequestMethod("GET");
            if(conn.getResponseCode() == 200){
                InputStream inStream = conn.getInputStream();
                byte[] data = StreamTool.read(inStream);
                return new String(data);
            }
            return null;
        }
    }

编写把流转化为数组的工具类：StreamTool

package com.zhoujn.internet.utils;
    
    import java.io.ByteArrayOutputStream;
    import java.io.InputStream;
    
    public class StreamTool {
        
    
        /**
         * 从流中读取数据
         * @param inStream
         * @return
         */
        public static byte[] read(InputStream inStream) throws Exception{
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len = 0;
            while( (len = inStream.read(buffer)) != -1){
                outputStream.write(buffer, 0, len);
            }
            inStream.close();
            return outputStream.toByteArray();
        }
    
    
    }

注意，需要配置AndroidManifest.xml  
因为要访问网络，所以需要加入网络访问权限,

<uses-permission android:name="android.permission.INTERNET"/>