Android 输入框被键盘遮挡-实现整体布局被键盘顶起来

场景： 在弹出的评论列表底部有一个输入框，当键盘弹出的时候输入框会被键盘遮挡一部分

想要实现： 输入框整体被键盘顶起不要被遮挡

代码： 通过监听根 View 的变化 并根据键盘的高度将布局上移

android:windowSoftInputMode="adjustPan"

mFragmentView.getViewTreeObserver().addOnGlobalLayoutListener(mOnGlobalLayoutListener);

private ViewTreeObserver.OnGlobalLayoutListener mOnGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
    public void onGlobalLayout() {
        possiblyResizeChildOfContent();
    }
};
private int mUsableHeightPrevious;

private void possiblyResizeChildOfContent() {
    int usableHeightNow = computeUsableHeight();
    int heightDifference;
    if (usableHeightNow != mUsableHeightPrevious) {
        int usableHeightSansKeyboard = mFragmentView.getRootView().getHeight();
        heightDifference = usableHeightSansKeyboard - usableHeightNow;

        if (heightDifference > 200) {
            // keyboard probably just became visible
            mFragmentView.setPadding(0, 0, 0, heightDifference);
        } else {
            // keyboard probably just became hidden
            mFragmentView.setPadding(0, 0, 0, 0);


        }

        mUsableHeightPrevious = usableHeightNow;
    }
}

private int computeUsableHeight() {
    final Rect rect = new Rect();
    mFragmentView.getWindowVisibleDisplayFrame(rect);
    return rect.bottom - rect.top;
}