不能在ImageView上使用setForeground方法 [英] Can't use setForeground method on ImageView

问题描述

我想使用setForeground方法在ImageView的中心显示一个播放"图标，以指示用户按下视频即可播放视频.

I want to use the setForeground method to show a "play" icon in the center of my ImageView to indicate the user that a video will play if they press it.

目前，我遇到了无法解决的错误:

Currently I'm having this error which I cannot solve:

尽管文档说该方法从API 1开始就应该可用.

Although the documentation says the method should be available since API 1:

我正在针对使用23.0.1版构建工具的API 23进行定位和编译.我的目标是最低API 16.

I'm targeting and compiling against API 23 with build tools version 23.0.1. I'm targeting min API 16.

推荐答案

即文档错误. setForeground()存在于API级别1的 FrameLayout 上；自API级别23起仅在 View 上.

That is a documentation bug. setForeground() existed on FrameLayout from API Level 1; it is only on View as of API Level 23.

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