用于隐藏软件键盘的 KeyEvent 代码？

Question

当在我的虚拟设备上打开软件键盘时，后退按钮会更改功能以在按下时隐藏键盘 - 它不会像隐藏键盘时那样保持 'KEYCODE_BACK'。

这个 "hide" 按钮是否仍然定义为 KeyEvent，或者我是否需要走不同的路线以便在按下时运行和 activity？

Android Studio 3.0.1

//setup i was hoping to use, but keycode changes whenever keyboard is shown//

public boolean onKeyDown(int keyCode, KeyEvent event){
        if (keyCode == KeyEvent.KEYCODE_BACK)
        {
            checkEmpty();
        }
        return false;
    }

Answer 1

如 CommonsWare 所述，"the system does not pass that event [back button while keyboard is displayed] to the activity. It just collapses the input method editor (soft keyboard)."

所以不，它不会触发 KeyEvent。

用于隐藏软件键盘的 KeyEvent 代码？

KeyEvent code for hiding software keyboard?

java

android

keyboard

keyevent

keycode