java - 为什么我运行它时显示 Hello World？

Question

package com.FlickrView;

import android.app.Activity;
import android.os.Bundle;
import java.net.*;
import java.io.*;

public class FlickrView extends Activity {

     /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        try {
            URL flickr = new URL("http://api.flickr.com/services/feeds/photos_public.gne?id=39350419@N06&lang=en-us&format=rss_200");
            URLConnection flickrConnect = flickr.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(flickrConnect.getInputStream()));
            String inputLine;
            while ((inputLine = in.readLine()) != null) 
                System.out.println(inputLine);
            in.close();
        } 
        catch (MalformedURLException e) {
          System.out.println("Unable to load URL");
          e.printStackTrace();
        } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
     }
}

Answer 1

因为您的 GUI 文件中有 Hello, World。查看 res/layout/main.xml 和 res/values/strings.xml。当你传入R.layout.main(一个int)时，相应的 View 会从main.xml中加载，这依赖于strings.xml。