“调用需要API级别23”错误，但是来自API 1的FrameLayout上存在getForeground（） [英] 'Call requires API level 23' error, but getForeground() exists on FrameLayout from API 1
问题描述
摘要
最后，我找到了相关问题， setForeground（）错误地标记为要求ViewGroups上的API 23扩展 FrameLayout 。
新问题
所以我的问题改为如何使用以前版本中的方法，以及为什么会有选择地出现检查错误？
如果我添加了多余的强制转换，错误消息就会消失：
（（FrameLayout）布局）.getForeground（）
但它是访问现在不支持的查看方法。
所以我认为定位以前的API会删除错误消息但我很感激使用这种Framelayout方法的解决方案或线索来解决我的问题：
ANDROID_COMPILE_SDK_VERSION = 23
ANDROID_BUILD_TOOLS_VERSION = 23.0.1
ANDROID_DEFAULT_MIN_SDK_VERSION = 19
ANDROID_DEFAULT_TARGET_SDK_VERSION = 23
解决方法
简而言之，作为解决方法，我将类型更改为 FrameLayout 直接，所以关于API和铸造的警告都消失了，我测试它适用于Android 4.4.4设备和调试，我认为它会崩溃，无论如何它只用于动画，我将在未来修复/替换它。
初步问题
我分叉并自定义了Google示例
但在旧版本上调用新方法检查显示需要API级别23的错误：
我找到了相似的问题，在这种情况下的一个错误，但我认为这不是一个由于原来的错误fork没有显示此错误消息。
我会尝试检测消息第一次出现，但我做了很多更改，所以任何线索都会受到赞赏，谢谢。
最后我找到了相关的问题， setForeground（）错误地标记为需要API 23 for Vie wGroups扩展 FrameLayout 。
问题189041：setForeground（）被错误地标记为要求ViewGroups的API 23（NewApi）扩展FrameLayout
如果你没有扩展 FrameLayout ，文档错误，确实需要API 23。
问题186273：View.setForeground错误的API级别
Summary
Finally, I found the related issue, setForeground() incorrectly flagged as requiring API 23 on ViewGroups extending FrameLayout.
If you are not extending FrameLayout, the documentation is wrong and API 23 is required.
Issue 186273: View.setForeground wrong API level
Updated question
Marked as duplicated of Can't use setForeground method on ImageView by Commonsware and answered by him:
That is a documentation bug. setForeground() existed on FrameLayout from API Level 1; it is only on View as of API Level 23.
In my case the documentation bug is not detected by the inspection in the fork but does it in an integration project, I don't understand it, anyway, this answers my initial question.
But It's not the same case, this code is already extending a Framelayout and using this method, it's not an ImageView, so I suppose the method has been removed in API 23. It doesn't appear in the reference now.
Update: I add a diff report for FrameLayout:
New question
So my question changes to how to use the method in previous versions, and, why does appear the inspection error selectively?
If I add a redundant cast, the error message disappears:
((FrameLayout) layout).getForeground()
But it's accessing the View method that is not supported now.
So I suppose targeting a previous API would remove the error message but I would appreciate a solution to use this Framelayout method or a clue to fix the issue in my case:
ANDROID_COMPILE_SDK_VERSION=23
ANDROID_BUILD_TOOLS_VERSION=23.0.1
ANDROID_DEFAULT_MIN_SDK_VERSION=19
ANDROID_DEFAULT_TARGET_SDK_VERSION=23
Workaround
In short, as a workaround, I changed the type to FrameLayout directly, so warnings about API and casting are gone, and I tested it works on Android 4.4.4 device and debugging, I thought it would crash, anyway it's only used in one animation, and I will fix/replace it in the future.
Initial question
I forked and customised the Google sample android-topeka, and android-studio shows an error that I don't understand about the API level required to use the method getForeground() of the class View in android.view package:
Call requires API level 23 (current min is 19): android.view.View#getForeground
The reference marks the method as added in API level 1, and the documentation (Control+Q) shows the same:
But the Calling new methods on older versions inspection shows an error that API level 23 is required:
I found a similar question, a bug in that case, but I think this is not a bug due to the original fork doesn't show this error message.
I'll try to detect the first time the message appears, but I did a lot of changes so any clue would be appreciated, thanks.
Finally I found the related issue, setForeground() incorrectly flagged as requiring API 23 for ViewGroups extending FrameLayout.
If you are not extending FrameLayout, the documentation is wrong and API 23 is really required.
Issue 186273: View.setForeground wrong API level
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