如何从其他活动转到已经存在的活动 [英] How to go to an already existing activity from a different one

问题描述

首先，我是Android编程的新手.我有一个很简单的问题，在任何地方都找不到答案.

To start off I am new to Android programming. I have a pretty straight forward question and I couldn't find an answer anywhere.

说我有2个分别称为A和B的Activity，并且都开始使用，如何在不声明Activity的新实例且不点击后退按钮的情况下切换Activity .在两个Activity中，我对另一个都有全局引用.如何使用setVisible()方法?文档似乎并没有使我明白这一点.

Say I have 2 Activitys called A and B and both getting started, how do i switch the Activitys without declaring a new instance of the Activitys and without hitting the back button. in both Activitys I have a global reference to the other one. do I use the setVisible() method? the documentations didn't seem to clear me up about this.

谢谢.

推荐答案

我使用setVisible方法吗?

do i use the setVisible method?

不.那只会在膨胀的Views/layouts上起作用.在正常情况下，调用layout不在堆栈顶部的任何layout都不可见.

No. That will only work on inflated Views/layouts. The layout that is in whichever Activity is not on the top of the stack will not be visible to call this method on, under normal circumstances.

在您的onClick()

Intent i = new Intent(CurrentActivityName.this, NextActivityName.class);
i.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
startActivity(i);

意图标志

来自文档

如果在传递给Context.startActivity()的Intent中进行设置，则此标志将使已启动的活动(如果已在运行中)置于其任务的历史记录堆栈的最前面.

If set in an Intent passed to Context.startActivity(), this flag will cause the launched activity to be brought to the front of its task's history stack if it is already running.

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