Main4Activity.java

package com.example.ipcplayer.thread;

import com.example.ipcplayer.R;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.widget.ImageView;
public class Main4Activity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main1);
            loadImage4("http://www.baidu.com/img/baidu_logo.gif", R.id.imageview1);
            loadImage4("http://www.chinatelecom.com.cn/images/logo_new.gif",
                            R.id.imageview2);
            loadImage4("http://cache.soso.com/30d/img/web/logo.gif",
                            R.id.imageview3);
            loadImage4("http://csdnimg.cn/www/images/csdnindex_logo.gif",
                            R.id.imageview4);
            loadImage4("http://images.cnblogs.com/logo_small.gif",
                            R.id.imageview5);
    }

    private AsyncImageLoader3 asyncImageLoader3 = new AsyncImageLoader3();

    // 引入线程池，并引入内存缓存功能,并对外部调用封装了接口，简化调用过程
    private void loadImage4(final String url, final int id) {
            // 如果缓存过就会从缓存中取出图像，ImageCallback接口中方法也不会被执行
            Drawable cacheImage = asyncImageLoader3.loadDrawable(url,
                            new AsyncImageLoader3.ImageCallback() {
                                    // 请参见实现：如果第一次加载url时下面方法会执行
                                    public void imageLoaded(Drawable imageDrawable) {
                                            ((ImageView) findViewById(id))
                                                            .setImageDrawable(imageDrawable);
                                    }
                            });
            if (cacheImage != null) {
                    ((ImageView) findViewById(id)).setImageDrawable(cacheImage);
            }
    }

}