调用硬件后退按钮编程？

问题描述

我知道，一个可以覆盖在Android上的后退按钮功能，但我不知道是否有一种方法或什么我可以调用，将在功能上做同样的事情为pressing硬件按钮。

I know that one can overwrite the Back Button functionality in Android, but I was wondering if there was a method or anything I could call that would functionally do the same thing as pressing the hardware button.

推荐答案

您可以发送后退按钮preSS到系统中像这样

You can send the back button press to the system like this

this.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_BACK));

或者你也可以覆盖后退按钮preSS和呼叫

Or you can override the back button press and call

finish();

您的活动。基本上做同样的事情作为一般的后退按钮。

on your Activity. That basically does the same thing as the generic back button.

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