Android Question Has anyone also seen the "Non-SDK interfaces usage" warning?

[fredo]

Our apps are regularly tested for problems in the "Firebase Test Lab".

Today was the first time a warning "Non-SDK interfaces usage" was issued:

Spoiler: Same in textform:

Non-SDK interfaces usage

Your app uses 16 non-SDK interfaces, which are incompatible with Android P+. Sample of used non-SDK interfaces:

Landroid/graphics/drawable/GradientDrawable$GradientState;->mSolidColors:Landroid/content/res/ColorStateList;

Landroid/hardware/input/InputManager;->INJECT_INPUT_EVENT_MODE_WAIT_FOR_FINISH:I

Landroid/hardware/input/InputManager;->getInstance()Landroid/hardware/input/InputManager;

Landroid/hardware/input/InputManager;->injectInputEvent(Landroid/view/InputEvent;I)Z

Landroid/os/Message;->flags:I

Landroid/os/Message;->recycleUnchecked()V

Landroid/os/Message;->when:J

Landroid/os/MessageQueue;->mMessages:Landroid/os/Message;

Landroid/os/MessageQueue;->next()Landroid/os/Message;

Landroid/view/View;->mAccessibilityDelegate:Landroid/view/View$AccessibilityDelegate;

Landroid/view/ViewConfiguration;->getDoubleTapMinTime()I

Landroid/view/WindowManagerGlobal;->getInstance()Landroid/view/WindowManagerGlobal;

Landroid/view/WindowManagerGlobal;->mParams:Ljava/util/ArrayList;

Landroid/view/WindowManagerGlobal;->mViews:Ljava/util/ArrayList;

Landroid/widget/AbsListView;->mFastScroll:Landroid/widget/FastScroller;

Ljava/nio/Buffer;->address:J

A first search led to this

However, due to a lack of background knowledge, no need for action could be derived from this.


Can anyone with certainty say what the necessary steps will be?




​

 

[Erel]

The Message and MessageQueue calls are related to DoEvents and Msgbox. They are indeed based on reflection but they do work on Android P.
I'm using an Android P device for several months now. I don't think that this report is accurate.

If you call Msbox on an Android P device then you will see these messages in the unfiltered logs:

Accessing hidden method Landroid/os/MessageQueue;->next()Landroid/os/Message; (light greylist, reflection)
Accessing hidden field Landroid/os/Message;->when:J (light greylist, reflection)
Accessing hidden field Landroid/os/Message;->flags:I (light greylist, reflection)
Accessing hidden method Landroid/os/Message;->recycleUnchecked()V (light greylist, reflection)

light greylist methods will work properly: https://developer.android.com/preview/restrictions-non-sdk-interfaces

With that said, you should avoid using modal dialogs or calling DoEvents: DoEvents deprecated and async dialogs

I think that the other methods from this report are also considered light greylist. The best option is to test it on an Android P device.

 

[fredo]

Thanks for the detailed feedback.
An "Accessing hidden" filter in Android Device Monitor's LogCat will help us to identify possible upcoming problems on "28+" devices.