MyApplication.java

package com.txsc.supplier;

import java.util.Stack;

import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;

import android.app.Activity;
import android.app.Application;
import android.content.Context;

/**
 * 初始化Activity栈，图片加载
 * 
 * @author linshao
 * 
 */
public class MyApplication extends Application {

	private static Stack<Activity> activityStack;
	private static MyApplication singleton;

	@Override
	public void onCreate() {
		super.onCreate();
		initImageLoader(this);
		singleton = this;
	}

	/*
	 * 初始化图片加载
	 */
	public static void initImageLoader(Context context) {
		ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
				context).threadPriority(Thread.NORM_PRIORITY - 2)
				.denyCacheImageMultipleSizesInMemory()
				.diskCacheFileNameGenerator(new Md5FileNameGenerator())
				.diskCacheSize(50 * 1024 * 1024) // 50 Mb
				.tasksProcessingOrder(QueueProcessingType.LIFO).build();
		ImageLoader.getInstance().init(config);
	}

	public static MyApplication getInstance() {
		return singleton;
	}

	/*
	 * 加入栈
	 */
	public void addActivity(Activity paramActivity) {
		if (activityStack == null)
			activityStack = new Stack<Activity>();
		activityStack.add(paramActivity);
	}

	/*
	 * 清空栈
	 */
	public void finishAllActivity() {
		try {
			for (Activity activity : activityStack) {
				if (activity != null)
					activity.finish();
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			System.exit(0);
		}
	}

}