ImageLoader加载图片

1.配置ImageLoader,在清单文件中配置App的name

package com.jingle.imageloaderstudy.app;

import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;

import android.app.Application;
import android.content.res.Configuration;
import android.util.Log;

public class MyApp extends Application {
    public static ImageLoader imgLoader;

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        Log.i("yy", "app create!!!");

        //1.未缓存图片
        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
                getApplicationContext())
                .threadPriority(Thread.NORM_PRIORITY - 2)
                .denyCacheImageMultipleSizesInMemory()
                .tasksProcessingOrder(QueueProcessingType.LIFO).build();
        imgLoader = ImageLoader.getInstance();
        imgLoader.init(config);
    }

}

2.加载网络图片

package com.jingle.imageloaderstudy.activity;

import com.jingle.imageloaderstudy.R;
import com.jingle.imageloaderstudy.app.MyApp;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {
    private ImageView img;

    String uri = "http://img13.360buyimg.com/da/jfs/t790/337/331050216/13395/5d79dbdb/55152d13Na6544d7d.jpg";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.i("yy", "activity create");
        initImg();
        initBtnLoadImg();
    }

    private void initImg() {
        img = (ImageView) findViewById(R.id.img);
    }

    private void initBtnLoadImg() {
        Button btn = (Button) findViewById(R.id.btn);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                LoadImg();
            }
        });
    }

    private void LoadImg() {
        img.setBackground(null);
        MyApp.imgLoader.displayImage(uri, img);

    }

}