如何在应用程序打开时获取键盘高度

Question

我使用了下面的代码来获取键盘高度。

view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect rect = new Rect();
                view.getWindowVisibleDisplayFrame(rect);

                int screenHeight = view.getRootView().getHeight();
                int keyboardHeight = screenHeight - rect.bottom;
                if(keyboardHeight != 0){
                    if(orientation == Configuration.ORIENTATION_LANDSCAPE)
                        AppConfig.landscapeKeyboardHeight = keyboardHeight;
                    else if(orientation == Configuration.ORIENTATION_PORTRAIT)
                        AppConfig.portraitKeyboardHeight = keyboardHeight;
                }
            }
        });

但这只在应用程序至少第一次打开键盘时才会给出高度。我想要键盘的高度，甚至在它第一次打开之前。有什么方法可以做到这一点吗？提前谢谢...

Answer 1

我以前也遇到过同样的问题，因为显示一些对话框时需要获得键盘的高度。你可以用下面的方法来解决这个问题。

rootView = getWindow().getDecorView().getRootView();
rootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            Rect rect = new Rect();
            rootView.getWindowVisibleDisplayFrame(rect);

            int screenHeight = rootView.getHeight();
            int keyboardHeight = screenHeight - (rect.bottom - rect.top);

            if(keyboardHeight > screenHeight / 3){
                keyboardActive = true;
                Log.d("Keyboard", "Active");

            }
            else{
                keyboardActive = false;
                Log.d("Keyboard", "Not Active");
            }
        }
    });