1+
2+ package com .jty .myutils .base ;
3+
4+ import android .app .Activity ;
5+ import android .app .ActivityManager ;
6+ import android .content .Context ;
7+
8+ import java .util .Stack ;
9+
10+ /**
11+ * activity管理
12+ */
13+ public class AppManager {
14+ private static Stack <Activity > activityStack ;
15+ private volatile static AppManager instance ;
16+
17+ private AppManager () {
18+
19+ }
20+ /**
21+ * 单一实例
22+ */
23+ public static AppManager getAppManager () {
24+ if (instance == null ) {
25+ synchronized (AppManager .class ){
26+ if (instance ==null ){
27+ instance = new AppManager ();
28+ instance .activityStack = new Stack ();
29+ }
30+ }
31+
32+ }
33+ return instance ;
34+ }
35+
36+ /**
37+ * 添加Activity到堆栈
38+ */
39+ public void addActivity (Activity activity ) {
40+ if (activityStack == null ) {
41+ activityStack = new Stack <Activity >();
42+ }
43+ activityStack .add (activity );
44+ }
45+
46+ /**
47+ * 获取当前Activity（堆栈中最后一个压入的）
48+ */
49+ public Activity currentActivity () {
50+ try {
51+ Activity activity = activityStack .lastElement ();
52+ return activity ;
53+ } catch (Exception e ) {
54+ // e.printStackTrace();
55+ return null ;
56+ }
57+ }
58+
59+ /**
60+ * 获取当前Activity的前一个Activity
61+ */
62+ public Activity preActivity () {
63+ int index = activityStack .size () - 2 ;
64+ if (index < 0 ) {
65+ return null ;
66+ }
67+ Activity activity = activityStack .get (index );
68+ return activity ;
69+ }
70+
71+ /**
72+ * 结束当前Activity（堆栈中最后一个压入的）
73+ */
74+ public void finishActivity () {
75+ Activity activity = activityStack .lastElement ();
76+ finishActivity (activity );
77+ }
78+
79+ /**
80+ * 结束指定的Activity
81+ */
82+ public void finishActivity (Activity activity ) {
83+ if (activity != null ) {
84+ activityStack .remove (activity );
85+ activity .finish ();
86+ activity = null ;
87+ }
88+ }
89+
90+ /**
91+ * 移除指定的Activity
92+ */
93+ public void removeActivity (Activity activity ) {
94+ if (activity != null ) {
95+ activityStack .remove (activity );
96+ activity = null ;
97+ }
98+ }
99+
100+ /**
101+ * 结束指定类名的Activity
102+ */
103+ public void finishActivity (Class <?> cls ) {
104+ try {
105+ for (Activity activity : activityStack ) {
106+ if (activity .getClass ().equals (cls )) {
107+ finishActivity (activity );
108+ }
109+ }
110+ } catch (Exception e ) {
111+ e .printStackTrace ();
112+ }
113+
114+ }
115+
116+ /**
117+ * 结束所有Activity
118+ */
119+ public void finishAllActivity () {
120+ for (int i = 0 , size = activityStack .size (); i < size ; i ++) {
121+ if (null != activityStack .get (i )) {
122+ activityStack .get (i ).finish ();
123+ }
124+ }
125+ activityStack .clear ();
126+ }
127+
128+ /**
129+ * 返回到指定的activity
130+ *
131+ * @param cls
132+ */
133+ public void returnToActivity (Class <?> cls ) {
134+ while (activityStack .size () != 0 )
135+ if (activityStack .peek ().getClass () == cls ) {
136+ break ;
137+ } else {
138+ finishActivity (activityStack .peek ());
139+ }
140+ }
141+
142+
143+ /**
144+ * 是否已经打开指定的activity
145+ * @param cls
146+ * @return
147+ */
148+ public boolean isOpenActivity (Class <?> cls ) {
149+ if (activityStack !=null ){
150+ for (int i = 0 , size = activityStack .size (); i < size ; i ++) {
151+ if (cls == activityStack .peek ().getClass ()) {
152+ return true ;
153+ }
154+ }
155+ }
156+ return false ;
157+ }
158+
159+ /**
160+ * 退出应用程序
161+ *
162+ * @param context 上下文
163+ * @param isBackground 是否开开启后台运行
164+ */
165+ public void AppExit (Context context , Boolean isBackground ) {
166+ try {
167+ finishAllActivity ();
168+ ActivityManager activityMgr = (ActivityManager ) context
169+ .getSystemService (Context .ACTIVITY_SERVICE );
170+ activityMgr .restartPackage (context .getPackageName ());
171+ } catch (Exception e ) {
172+
173+ } finally {
174+ // 注意，如果您有后台程序运行，请不要支持此句子
175+ if (!isBackground ) {
176+ System .exit (0 );
177+ }
178+ }
179+ }
180+ }
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