Android通过访问网页查看网页源码实例详解

Android通过访问网页查看网页源码

1.添加网络权限

2.获取网络中网页的数据

/**    * 获取网页HTML源代码    * @param path 网页路径    */   public static String getHtml(String path) throws Exception {     URL url=new URL(path);     HttpURLConnection conn=(HttpURLConnection)url.openConnection();     conn.setConnectTimeout(5000);     conn.setRequestMethod("GET");     if(conn.getResponseCode()==200){       InputStream inStream=conn.getInputStream();       byte[] data=read(inStream);       String html=new String(data,"UTF-8");       return html;     }     return null;   }    /**    * 读取流中的数据    */   public static byte[] read(InputStream inputStream) throws IOException {     ByteArrayOutputStream outputStream=new ByteArrayOutputStream();     byte[] b=new byte[1024];     int len=0;     while((len=inputStream.read(b))!=-1){       outputStream.write(b);     }     inputStream.close();     return outputStream.toByteArray();   }

3.处理查看网页源码的控制

public class HtmlViewActivity extends Activity {    private EditText pathText;   private TextView codeView;   @Override   public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.main);     pathText=(EditText) findViewById(R.id.pagepath);//网页路径     codeView=(TextView)findViewById(R.id.codeView);//显示获得的源码     Button button=(Button) findViewById(R.id.button);//查看按钮     button.setOnClickListener(new ButtonClickListener());//按钮事件   }   /**    * 查看按钮处理事件    */   private final class ButtonClickListener implements View.OnClickListener{     @Override     public void onClick(View v) {       String path=pathText.getText().toString();       try {         String html=PageService.getHtml(path);         codeView.setText(html);       } catch (Exception e) {         e.printStackTrace();         Toast.makeText(getApplicationContext(), R.string.error, 1);       }     }   } }

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