C# DispatchKeyEvent未在我的视图上触发

我需要在CustomView中截获物理密钥事件，因此我写了以下内容：

   public class CustomView : View
   {
        public override bool DispatchKeyEvent(KeyEvent e)
        {
            return base.DispatchKeyEvent(e);
        }
    }

我不知道为什么当我按下任何键时从不调用DispatchKeyEvent

我怎样才能让它工作

注意：似乎在活动中重写相同的方法是可行的，但我需要在我的CustomView中执行此操作。

一旦您的CustomView被聚焦并且FocusableInTouchMode=true，您就可以捕获KeyEvent。从DispatchEvent源代码中，我们可以看到：

@Override
public boolean dispatchKeyEvent(KeyEvent event) {

    if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
            == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
        // If this ViewGroup is focused and its size has been set(has border),pass the KeyEvent to the view

        if (super.dispatchKeyEvent(event)) {
            return true;
        }
    } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
            == PFLAG_HAS_BOUNDS) {
        //If this ViewGroup has a focused child,and the child has a size
        if (mFocused.dispatchKeyEvent(event)) { 
            return true; 
           // We can see that only the child is focused it can be catch the key event
        }
    }

    if (mInputEventConsistencyVerifier != null) {
        mInputEventConsistencyVerifier.onUnhandledEvent(event, 1);
    }
    return false;
}

因此，customView必须聚焦于能够捕获KeyEvent

若要解决此问题，请将此代码添加到customView：

---

关键事件似乎已由活动处理，因此无法传递到视图。您的Customview必须聚焦，然后关键事件才能从活动传递到Customview。确定！它起作用了！现在我有了按键代码，但是我怎么才能得到我按下的正确的键盘字母呢？结果是按西班牙语键ñI得到Keycode.AltLeft。有没有办法拿到真正的钥匙？我的意思是，关注关键地图？我创建了一个单独的问题来更好地解释它：当视图处于活动状态时，您还需要请求焦点

public GameView(Context context, IAttributeSet attrs, int defStyle) : base(context, attrs, defStyle)
{
     //Set whether this view can receive the focus
     this.Focusable = true;

    //When a view is focusable, it may not want to take focus when in touch mode.
    //For example, a button would like focus when the user is navigating via a D-pad
    //so that the user can click on it, but once the user starts touching the screen,
    //the button shouldn't take focus
     this.FocusableInTouchMode = true;
}

//Returns whether this View is able to take focus
public override bool IsFocused => true;