回到previous屏幕，而无需创建新实例 [英] Go back to previous screen without creating new instance

问题描述

作为图像解释，流量是这样的。所以每当上标识的按钮活动用户点击被调用。作为简单的解决方案，我们可以用这种方法...

As explained in image, flow is something like this. So whenever user click on logo button Activity A should be called. As simple solution we can use this method...

Intent intent = new Intent(activity, activityToStart);
startActivity(intent);

但这种活动将创造我的应用程序的新活动。但我需要调用该活动的同一个实例，我们流程图中前进。活动从A到B，然后再打开B能很容易地通过调用完成（）但是从活动C或D，怎么回来到A

But this activity will create a new activity for my app. but I need to call the same instance of the activity as we move forward in flow diagram. from Activity A to B and then again on B can be called easily by callingfinish() but from Activity C or D, how to come back to A.

我运行的想法，但没有得到任何卓见成效。请帮助我，如果你有任何建议或任何地方，我错了。先谢谢了。

I am running out of ideas but not getting any fruitful result. Please help me if you have any suggestion or at any place i am going wrong. Thanks in advance.

推荐答案

要由D回来给A，使用意向的标志。

To Come Back from D to A, use Intent Flags.

Intent intent = new Intent(activity, activityToStart);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
startActivity(intent);

FLAG_ACTIVITY_CLEAR_TOP，会而不是创建新的活动，它会调用堆栈上的活动，并会弹出所有的活动在被调用的活动。

FLAG_ACTIVITY_CLEAR_TOP, will instead of creating new activity, it will invoke the activity on the stack, and will pop all the activities over the activity being invoked.

这篇关于回到previous屏幕，而无需创建新实例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！