有一陣子沒有寫程序，連基本的AsyncTask用法都記不清楚了，復(fù)習(xí)一下于是有了下面的圖片加載類。

package com.hitech.download;import java.io.IOException;import org.apache.http.HttPResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.AsyncTask;import android.util.Log;import android.widget.ImageView;public class ImageLoader {    private static final String TAG = "ImageLoader";    private String url = null;    private ImageView imageView = null;    public ImageLoader() {    }    public ImageLoader(String url, ImageView imageView) {        this.url = url;        this.imageView = imageView;    }    public void execute() {        new Loader().execute(new String[] { url });    }    public class Loader extends AsyncTask<String, String, Bitmap> {        @Override        protected void onPreExecute() {            super.onPreExecute();        }        @Override        protected Bitmap doInBackground(String... params) {            HttpClient client = new DefaultHttpClient();            HttpGet request = new HttpGet(params[0]);            Log.e(TAG, params[0]);            try {                HttpResponse response = client.execute(request);                System.out.println(response.getStatusLine().getStatusCode());                if (response.getStatusLine().getStatusCode() == 200) {                    return BitmapFactory.decodeStream(response.getEntity().getContent());                }            } catch (ClientProtocolException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPostExecute(Bitmap bm) {            super.onPostExecute(bm);            // imageView.setImageBitmap(bm);            imageView.setImageBitmap(bm);        }    }}

調(diào)用只需要一行簡(jiǎn)單的代碼就能完成圖片的加載。

new ImageLoader("http://192.168.0.251/welcome.png", imageView1).execute();new ImageLoader("http://192.168.0.251/genymotion.png", imageView2).execute();