如果XML中ImageView并不是在第一层第一个所导致的崩溃问题

[GitJoBo]

PhotoViewer的findImageView函数
private fun findImageView(group: ViewGroup): ImageView? {
for (i in 0 until group.childCount) {
return when {
group.getChildAt(i) is ImageView -> group.getChildAt(i) as ImageView
group.getChildAt(i) is ViewGroup -> findImageView(group.getChildAt(i) as ViewGroup)
else -> throw RuntimeException("未找到ImageView")
}
}
return null
}

只会判断第一个view，for循环是没用的

[GitJoBo]

这是修复后可用的函数
private fun findImageView(group: ViewGroup): ImageView? {
for (i in 0 until group.childCount) {
val child = group.getChildAt(i)
if (child is ImageView) {
return child
} else if (child is ViewGroup) {
val result = findImageView(child)
if (result != null) {
return result
}
}
}
throw RuntimeException("未找到ImageView")
}