Android活动工具类

import android.app.Activity;

import java.util.ArrayList;
import java.util.List;

//活动汇总管理
public class ActivityCollector {
    public static List<Activity> activities = new ArrayList<Activity>();

    //添加活动
    public static void addActivity(Activity activity) {
        activities.add(activity);
    }

    //移除活动
    public static void removeActivity(Activity activity) {
        activities.remove(activity);
    }

    //关闭所有活动
    public static void finishAll() {
        for (Activity activity : activities) {
            if (!activity.isFinishing()) {
                activity.finish();
            }
        }
    }

}

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

//重写Activity基本类
public class BaseActivity extends Activity {
    @Override

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //显示父类名称
        Log.d("woider", getClass().getSimpleName());
        //添加至活动中心
        ActivityCollector.addActivity(this);
    }
    protected void onDestroy(){
        super.onDestroy();
        //从活动中心移除
        ActivityCollector.removeActivity(this);
    }

}