Task stack management



import android.app.Activity;

import java.util.Stack;


public class CommonActivityManager {


    //Activity堆栈
    private static Stack<Activity> activityStack;
    private static CommonActivityManager instance;
    //事件通知接口
    private Action action;
    private Action removeAction;

    public CommonActivityManager setAction(Action action) {
        this.action = action;
        return this;
    }

    public CommonActivityManager setRemoveAction(Action removeAction) {
        this.removeAction = removeAction;
        return this;
    }

    private CommonActivityManager() {

    }

    /**
     * 单例
     *
     * @return
     */
    public static CommonActivityManager getActivityManager() {
        if (instance == null) {
            instance = new CommonActivityManager();
        }
        return instance;
    }

    /**
     * 关闭最上层的activity
     */
    public void popActivity() {
        Activity activity = activityStack.lastElement();
        if (activity != null) {
            activity.finish();
            activity = null;
        }
    }

    public void removeActivity(Activity activity) {
        if (removeAction != null) {
            String deleteName = activity.getClass().getName();
            activityStack.remove(activity);
            removeAction.removeAction(deleteName);
        }else{
            activityStack.remove(activity);
            activity = null;
        }

    }

 /**
     * 添加指定的activity
     *
     * @param activity
     */
    public void pushActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack<Activity>();
        }
        activityStack.add(activity);
        if (action != null) {
            try {
                action.addAction();
            } catch (Exception e) {
                //ignore
            }
        }
    }

    /**
     * 关闭指定的activity
     *
     * @param activity
     */
    public void popActivity(Activity activity) {
        if (activity != null) {
            activity.finish();
            removeAction();
            activityStack.remove(activity);
            activity = null;
        }
    }

    /**
     * 获取当前的activity
     *
     * @return
     */
    public Activity currentActivity() {

        if (activityStack != null && activityStack.size() != 0) {
            Activity activity = activityStack.lastElement();
            return activity;
        } else {
            return null;
        }

    }

   

    public void removeAction() {
        if (action != null) {
            action = null;
        }
        if(removeAction!=null){
            removeAction=null;
        }
    }

    /**
     * 关闭所有Activity, 除了cls
     *
     * @param cls
     */
    public void popAllActivityExceptOne(Class cls) {
        try {
            for (int i = 0; i < activityStack.size(); i++) {
                Activity activity = activityStack.get(i);

                if (activity == null) {
                    continue;
                }
                if (activity.getClass().equals(cls)) {
                    continue;
                }
                popActivity(activity);
                i--;
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 关闭所有Activity, 除了packageNameClass
     *
     * @param packageNameClass
     */
    public void popAllActivityExceptOne(String packageNameClass) {
        Class<?> aClass = null;
        try {
            for (int i = 0; i < activityStack.size(); i++) {
                Activity activity = activityStack.get(i);

                if (activity == null) {
                    continue;
                }
                if (activity.getClass().getName().equals(packageNameClass)) {
                    continue;
                }
                popActivity(activity);
                i--;
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 关闭指定的两个Activity, 除了cls
     *
     * @param cls1 cls2
     */
    public void popAllActivityExceptTwo(Class cls1, Class cls2) {
        try {
            for (int i = 0; i < activityStack.size(); i++) {
                Activity activity = activityStack.get(i);
                if (activity == null) {
                    continue;
                }
                if (activity.getClass().equals(cls1) || activity.getClass().equals(cls2)) {
                    continue;
                }
                popActivity(activity);
                i--;
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 退出应用
     */
    public void exitApp() {

        try {
            while (true) {
                Activity activity = currentActivity();
                if (activity == null) {
                    break;
                }
                popActivity(activity);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public interface Action<T> {
        void addAction();

        void removeAction(T t);
    }

    public <T> T getActivity(Class<T> t) {
        if (activityStack == null) {
            return null;
        }
        for (Activity activity : activityStack) {
            if (activity.getClass().getName().equals(t.getName())) {
                return (T) activity;
            }
        }
        return null;
    }
}
任务栈是管理Activity的,而每一个Activity的生命周期都是可以被application监听到的,这个可以查看之前的一片关于Activity启动的博客,所以请看下面:
application.registerActivityLifecycleCallbacks(new Application.ActivityLifecycleCallbacks() {
    @Override
    public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
        Activitymanager.getActivityManager().pushActiivty(activity);
    }

    @Override
    public void onActivityStarted(Activity activity) {

    }

    @Override
    public void onActivityResumed(Activity activity) {

    }

    @Override
    public void onActivityPaused(Activity activity) {

    }

    @Override
    public void onActivityStopped(Activity activity) {

    }

    @Override
    public void onActivitySaveInstanceState(Activity activity, Bundle outState) {

    }

    @Override
    public void onActivityDestroyed(Activity activity) {
 Activitymanager.getActivityManager().removeActivity(activity);
    }
});

In this way, all loaded incoming activities can be managed and acquired in a unified manner, including Jar packages or aars.  

 

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Origin blog.csdn.net/lk2021991/article/details/89537393