如何判断一个视图在 Android 屏幕上是否可见? [英] How can you tell if a View is visible on screen in Android?

问题描述

我想检查 ScrollView 中的 View 当前是否在 Android 中可见.我不是在检查它是否被关注，而是检查它当前是否正在显示在屏幕上.View 中是否有一个方法可以告诉我该视图当前是否可见?

I want to check if a View within a ScrollView is currently visible in Android. I am not checking if it is focused on yet but if it is currently being displayed on screen. Is there a method in View that can tell me if the view is currently visible?

推荐答案

这段代码对我有用:

public static boolean isVisible(final View view) {
    if (view == null) {
        return false;
    }
    if (!view.isShown()) {
        return false;
    }
    final Rect actualPosition = new Rect();
    view.getGlobalVisibleRect(actualPosition);
    final Rect screen = new Rect(0, 0, getScreenWidth(), getScreenHeight());
    return actualPosition.intersect(screen);
}

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