Android Activity栈管理 制定关闭某一个Activity,关闭所有Activit

api :打开新的activity 关闭之前所有activity。

intent intent = new intent(this, loginactivity.class);
intent.setflags(intent.flag_activity_clear_task | intent.flag_activity_new_task);
startactivity(intent);

自己管理: 将activity放入集合进行管理

/**  
 * activity管理类  
 *
 */ 
public class appmanager { 
 
 private static stack activitystack; 
 
 private static appmanager instance; 
 
 private appmanager() { 
 } 
 
 /**  
  * 单一实例  
  */ 
 public static appmanager getappmanager() { 
  if (instance == null) { 
instance = new appmanager(); 
  } 
  return instance; 
 } 
 
 /**  
  * 添加activity到堆栈  
  */ 
 public void addactivity(activity activity) { 
  if (activitystack == null) { 
activitystack = new stack(); 
  } 
  activitystack.add(activity); 
 } 
 
 /**  
  * 获取当前activity（堆栈中最后一个压入的）  
  */ 
 public activity currentactivity() { 
  activity activity = activitystack.lastelement(); 
  return activity; 
 } 
 
 /**  
  * 结束当前activity（堆栈中最后一个压入的）  
  */ 
 public void finishactivity() { 
  activity activity = activitystack.lastelement(); 
  finishactivity(activity); 
 } 
 
 /**  
  * 结束指定的activity  
  */ 
 public void finishactivity(activity activity) { 
  if (activity != null) { 
activitystack.remove(activity); 
activity.finish(); 
activity = null; 
  } 
 } 
 
 /**  
  * 结束指定类名的activity  
  */ 
 public void finishactivity(class cls) { 
  for (activity activity : activitystack) { 
if (activity.getclass().equals(cls)) { 
 finishactivity(activity); 
} 
  } 
 } 
 
 /**  
  * 结束所有activity  
  */ 
 public void finishallactivity() { 
  for (int i = 0, size = activitystack.size(); i < size; i++) { 
if (null != activitystack.get(i)) { 
 activitystack.get(i).finish(); 
} 
  } 
  activitystack.clear(); 
 } 
 
 /**  
  * 退出应用程序  
  */ 
 @suppresswarnings("deprecation") 
 public void appexit(context context) { 
  try { 
finishallactivity(); 
activitymanager activitymanager = (activitymanager) context.getsystemservice(context.activity_service); 
activitymanager.restartpackage(context.getpackagename()); 
system.exit(0); 
  } catch (exception e) { 
e.printstacktrace(); 
  } 
 } 
}