如何在 Android 中重新启动 Activity [英] How to restart Activity in Android

问题描述

如何重新启动 Android Activity?我尝试了以下操作，但 Activity 只是退出.

How do I restart an Android Activity? I tried the following, but the Activity simply quits.

public static void restartActivity(Activity act){

        Intent intent=new Intent();
        intent.setClass(act, act.getClass());
        act.startActivity(intent);
        act.finish();

}

推荐答案

我的主题切换器是这样处理的:

I did my theme switcher like this:

Intent intent = getIntent();
finish();
startActivity(intent);

基本上，我首先调用 finish()，并且我使用与此活动开始时完全相同的意图.这似乎可以解决问题?

Basically, I'm calling finish() first, and I'm using the exact same intent this activity was started with. That seems to do the trick?

更新:正如下面 Ralf 所指出的，Activity.recreate() 是 API 11 及更高版本的方法.如果您在 API11+ 环境中，这是更可取的.如果您使用的是 API 10 或更低版本，您仍然可以检查当前版本并调用上面的代码片段.(请不要忘记为 Ralf 的回答点赞！)

UPDATE: As pointed out by Ralf below, Activity.recreate() is the way to go in API 11 and beyond. This is preferable if you're in an API11+ environment. You can still check the current version and call the code snippet above if you're in API 10 or below. (Please don't forget to upvote Ralf's answer!)

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