刷新活动而不重新打开吗? [英] Refresh activity without re-opening it?

问题描述

我在应用程序中实现了一个按钮，该按钮使用以下代码清除了所有共享首选项:

I implemented a button in my app that clears all sharedpreferences using this code:

context.getSharedPreferences("bifrostPrefs", 0).edit().clear().commit();

现在的问题是，每当我使用按钮时，我都需要退出活动并重新打开以查看结果.我尝试通过使用以下代码简单地使按钮重新打开活动来解决此问题:

Now the problem is that whenever I use the button, I then need to exit the activity and re-open it to see results. I tried solving this by simply making the button re-open the activity with this code:

Intent reOpen = new Intent (Bifrost.this, Bifrost.class);
startActivity(reOpen);

我的想法似乎很明智，直到我注意到如果我重新打开活动，则需要按两次返回按钮以返回到主要活动.所以我做了一些研究，发现了这段代码:

My idea seemed smart until I noticed that if I re-open the activity, I then need to press the back button twice to get back to main activity. So I did some reserach and found this code:

finish();
startActivity(getIntent());

这现在可以正常工作，活动得到刷新，然后我只需要单击一次后退按钮.但是，还有另一种刷新活动而又不闪烁"进出活动的方法吗?如您所知，每次您打开一个新活动时，它都会闪烁进出，因此应用程序会延迟一秒钟.是否可以通过绕过此方法来刷新活动?

This now works fine, the activity gets refreshed and then I only need to click the back button once. But is there another way to refresh activity without it "flashing" in and out? As you know, everytime you open a new activity, it flashes in and out so the app lags for a second. Is there a way to refresh an activity by bypassing this?

推荐答案

好，最好更新活动的内容，但是如果太复杂，则可以使用以下方法覆盖默认动画:

Well, it would be better to update the content of the activity, but if it's too complicated you can override the default animation with this method :

finish();
overridePendingTransition( 0, 0);
startActivity(getIntent());
overridePendingTransition( 0, 0);

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