1.统一应用程序中所有的Activity的栈管理
涉及到activity的添加、删除指定、删除当前、删除所有、返回栈大小的方法
public class AppManager {
private Stack<Activity> activityStack = new Stack<>();
//设置当前类是单例的
private static AppManager appManager = new AppManager();
private AppManager(){}
public static AppManager getInstance(){
return appManager;
}
public void addActivity(Activity activity){
activityStack.add(activity);
}
public void removeActivity(Activity activity){
for(int i = activityStack.size() - 1; i >= 0 ; i--) {
if(activityStack.get(i).getClass().equals(activity.getClass())){
activity.finish();
activityStack.remove(i);
break;
}
}
}
public void removeCurrent(){
// Activity activity = activityStack.get(activityStack.size() - 1);
Activity activity = activityStack.lastElement();
activity.finish();
activityStack.remove(activity);
}
public void removeAll(){
for(int i = activityStack.size() - 1; i >= 0 ; i--) {
activityStack.get(i).finish();
activityStack.remove(i);
}
}
public int size(){
return activityStack.size();
}
}
2.在MainActivity中，将当前的Activity添加到栈管理中：
protected void onCreate(Bundle savedInstanceState) {
//将当前的Activity添加到栈管理中
AppManager.getInstance().addActivity(this);
}