连网获取图片的小程序

 

这些文件实际存放在电脑的硬盘上，通过tomcat已经做好了映射：参考

package net.blogjava.mobile;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RatingBar;
import android.widget.TextView;

public class Main extends ListActivity
{
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
    
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.menu, menu);//调用第二步中定义的Menu界面描述文件
            return true;

    }
    

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        Intent intent = new Intent(Main.this, Main.class);
        startActivity(intent);                                    
         //close this activity
         finish();
        return true;
    }


    public class ApkListAdapter extends BaseAdapter
    {
        private Context context;
        private LayoutInflater layoutInflater;
        private String inflater = Context.LAYOUT_INFLATER_SERVICE;
        private String rootUrl = "http://192.168.43.62/apk/";
        private String listUrl = rootUrl + "list.txt";
        private List<ImageData> imageDataList = new ArrayList<ImageData>();

        class ImageData
        {
            public String url;
            public String applicationName;
            public float rating;
        }

        private InputStream getNetInputStream(String urlStr)
        {
            try
            {
                URL url = new URL(urlStr);
                URLConnection conn = url.openConnection();
                conn.connect();
                InputStream is = conn.getInputStream();
                return is;
            }
            catch (Exception e)
            {

            }
            return null;
        }

        public ApkListAdapter(Context context)
        {
            this.context = context;
            layoutInflater = (LayoutInflater) context
                    .getSystemService(inflater);
            try
            {
                InputStream is = getNetInputStream(listUrl);
                InputStreamReader isr = new InputStreamReader(is, "GBK");
                BufferedReader br = new BufferedReader(isr);
                String s = null;
                while ((s = br.readLine()) != null)
                {
                    String[] data = s.split(",");
                    if (data.length > 2)
                    {
                        ImageData imageData = new ImageData();
                        imageData.url = data[0];
                        Log.d("aa", imageData.url);
                        imageData.applicationName = data[1];
                        imageData.rating = Float.parseFloat(data[2]);
                        imageDataList.add(imageData);
                    }
                }
                is.close();
            }
            catch (Exception e)
            {
                // TODO: handle exception
            }
        }

        @Override
        public int getCount()
        {
            return imageDataList.size();
        }

        @Override
        public Object getItem(int position)
        {
            return position;
        }

        @Override
        public long getItemId(int position)
        {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent)
        {
            LinearLayout linearLayout = (LinearLayout) layoutInflater.inflate(
                    R.layout.item, null);
            ImageView ivLogo = (ImageView) linearLayout
                    .findViewById(R.id.ivLogo);

            TextView tvApplicationName = ((TextView) linearLayout
                    .findViewById(R.id.tvApplicationName));

            TextView tvRating = (TextView) linearLayout
                    .findViewById(R.id.tvRating);
            RatingBar ratingBar = (RatingBar) linearLayout
                    .findViewById(R.id.ratingbar);

            tvApplicationName
                    .setText(imageDataList.get(position).applicationName);
            tvRating
                    .setText(String.valueOf(imageDataList.get(position).rating));
            ratingBar.setRating(imageDataList.get(position).rating);

            try
            {
                InputStream is = getNetInputStream(rootUrl
                        + imageDataList.get(position).url);
                Bitmap bitmap = BitmapFactory.decodeStream(is);
                is.close();
                ivLogo.setImageBitmap(bitmap);
            }
            catch (Exception e)
            {
            }

            return linearLayout;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        ApkListAdapter apkListAdapter = new ApkListAdapter(this);
        setListAdapter(apkListAdapter);

    }
}

要想实现最终的功能，手机和电脑必须在同一个内网上，手机建立热点，电脑连上。

最终效果：

源码传送门

在台式机上发现

http://219.245.64.92:8080/apk/ 本机IP

http://219.245.64.1:8080/apk/ 都能找到

哈哈，发现最终可能是师兄留下的，原来别人早已干过，惭愧！