通过ActivityManager 管理activity

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package com.nodepp.smartplug.activity;import android.app.Activity;import android.content.Context;import android.os.*;import android.os.Process;import android.util.Log;import java.util.ArrayList;import java.util.Iterator;import java.util.Stack;/** * Created by yuyue on 2016/8/5. * 管理activity */public class ActivityManager {        private static Stack<Activity> activityStack;        private static ActivityManager instance;        private ActivityManager() {        }        public static ActivityManager getAppManager() {            if(instance == null) {                instance = new ActivityManager();            }            return instance;        }        public void addActivity(Activity activity) {            if(activityStack == null) {                activityStack = new Stack();            }            Log.i("appmanager", "******************" + activityStack.size());            if(activityStack.size() > 0) {                Activity act = (Activity)activityStack.lastElement();                Log.i("appmanager", "******************" + act.getClass());                if(act != null && act.getClass().equals(activity.getClass())) {                    this.finishLastActivity();                }            }            activityStack.add(activity);        }        public Activity currentActivity() {            Activity activity = (Activity)activityStack.lastElement();            return activity;        }        public void finishActivity() {            Activity activity = (Activity)activityStack.lastElement();            this.finishActivity(activity);        }        public void finishActivity(Activity activity) {            if(activity != null) {                this.removeActivityStack(activity);                activity.finish();                activity = null;            }        }        public void removeActivityStack(Activity activity) {            activityStack.remove(activity);        }        public void finishLastActivity() {            Activity activity = (Activity)activityStack.lastElement();            if(activity != null) {                activityStack.remove(activity);                activity.finish();                activity = null;            }        }        public void finishActivity(Class<?> cls) {            Iterator i$ = activityStack.iterator();            while(i$.hasNext()) {                Activity activity = (Activity)i$.next();                if(activity.getClass().equals(cls)) {                    this.finishActivity(activity);                }            }        }        public void finishAllActivity() {            int i = 0;            for(int size = activityStack.size(); i < size; ++i) {                if(null != activityStack.get(i)) {                    ((Activity)activityStack.get(i)).finish();                }            }            activityStack.clear();        }        public void AppExit(Context context) {            try {                this.finishAllActivity();                System.exit(0);                android.os.Process.killProcess(Process.myPid());            } catch (Exception var3) {                ;            }        }        public void getActivity(Activity activity) {            if(activity != null) {                activityStack.remove(activity);                activity.finish();                activity = null;            }        }        public Activity getActivity(Class<?> cls) {            Iterator i$ = activityStack.iterator();            Activity activity;            do {                if(!i$.hasNext()) {                    return null;                }                activity = (Activity)i$.next();            } while(!activity.getClass().equals(cls));            return activity;        }        public void goToActivity(Activity activity) {            int flag = -1;            ArrayList activities = new ArrayList();            Iterator i = activityStack.iterator();            Activity act;            while(i.hasNext()) {                act = (Activity)i.next();                if(flag == 0) {                    ++flag;                }                if(flag > 0) {                    activities.add(act);                }                if(flag == -1 && act.getClass().equals(activity.getClass())) {                    flag = 0;                }            }            for(int var6 = activities.size() - 1; var6 > -1; --var6) {                act = (Activity)activities.get(var6);                activityStack.remove(act);                act.finish();                act = null;            }        }        public void goToActivity(Class<?> cls) {            int flag = -1;            ArrayList activities = new ArrayList();            Iterator i = activityStack.iterator();            Activity act;            while(i.hasNext()) {                act = (Activity)i.next();                Log.i("goToActivity","goToActivity=="+act.getClass());                if(flag >= 0) {                    ++flag;                }                if(flag > 0) {                    activities.add(act);                }                if(flag == -1) {                    Log.i("activity.getClass()", act.getClass().toString());                    if(act.getClass().equals(cls)) {                        flag = 0;                    }                }            }            for(int var6 = activities.size() - 1; var6 > -1; --var6) {                act = (Activity)activities.get(var6);                Log.i("activity.getClass() => ", act.getClass().toString());                activityStack.remove(act);                act.finish();                act = null;            }        }        public int getActivityCount() {            return activityStack.size();        }    }
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