Android 监听软键盘收起

最新推荐文章于 2025-07-13 09:48:47 发布

转载最新推荐文章于 2025-07-13 09:48:47 发布 · 1.2k 阅读

本文介绍了一种在Android应用中监听键盘弹出与收起的方法，通过计算屏幕可用高度的变化来判断键盘状态，实现对输入框下方布局的智能调整。

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private int usableHeightPrevious;
private RelativeLayout relativeLayout;
private View mChildOfContent;

relativeLayout = (RelativeLayout) findViewById(R.id.RelativeLayout);
mChildOfContent = relativeLayout.getChildAt(0);
usableHeightPrevious =  computeUsableHeight();
mChildOfContent.getViewTreeObserver()
        .addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                possiblyResizeChildOfContent();
            }});

private void possiblyResizeChildOfContent() {
    int usableHeightNow = computeUsableHeight();
    if (usableHeightNow != usableHeightPrevious) {
        int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
        int heightDifference = usableHeightSansKeyboard - usableHeightNow;
        if (heightDifference > (usableHeightSansKeyboard / 4)) {
     
            L.e("键盘弹出");
        } else {
         
            L.e("键盘收起");
            hideBottomUIMenu();
        }
        mChildOfContent.requestLayout();
        usableHeightPrevious = usableHeightNow;
    }
}


private int computeUsableHeight() {
    Rect r = new Rect();
    mChildOfContent.getWindowVisibleDisplayFrame(r);
    return (r.bottom - r.top);}

https://www.jianshu.com/p/dbd26e8c0439