切换到其它界面再切换回来后，点击按钮，面板不显示

[lyzyjoyo]

切换到其它界面再切换回来后，点击按钮，面板不显示。 经过排查，发现是KeyboardUtil中的这段代码引起的：

if(!isOverlayLayoutDisplayHContainStatusBar) {
    // in case of the keyboard is hiding, the display height of the
    // action-bar-overlay-layout would be possible equal to the screen height.

    // and if isOverlayLayoutDisplayHContainStatusBar has already been true, the
    // display height of action-bar-overlay-layout must include the height of the
    // status bar always.
    isOverlayLayoutDisplayHContainStatusBar =
            overlayLayoutDisplayHeight == screenHeight;
}

if (!isOverlayLayoutDisplayHContainStatusBar) {
    // In normal case, we need to plus the status bar height manually.
    displayHeight = overlayLayoutDisplayHeight + statusBarHeight;
} else {
    // In some case(such as Samsung S7 edge), the height of the
    // action-bar-overlay-layout display bound already included the height of the
    // status bar, in this case we doesn't need to plus the status bar height
    // manually.
    displayHeight = overlayLayoutDisplayHeight;
}

因为切换到其它界面再切换回来后isOverlayLayoutDisplayHContainStatusBar为true，displayHeight = overlayLayoutDisplayHeight，导致后面的运算：isKeyboardShowing = actionBarOverlayLayoutHeight > displayHeight中的isKeyboardShowing结果为true，表示键盘显示，但是其实键盘没有显示。

而调用面板KPSwitchPanelLinearLayout的setVisibility(View.VISIBLE)方法的时候，调用了KPSwitchPanelLayoutHandler的filterSetVisibility方法，filterSetVisibility方法里面有一段代码：

if (isKeyboardShowing() && visibility == View.VISIBLE) {
    return true;
}

isKeyboardShowing()为true，导致跳过了KPSwitchPanelLinearLayout的super.setVisibility()方法，所以面板不显示。

目前我的解决方法是去掉if(!isOverlayLayoutDisplayHContainStatusBar)这个判断，让每次计算displayHeight前都给isOverlayLayoutDisplayHContainStatusBar重新赋值。 @Jacksgong，您看下有没有更好的解决方法。