FrameData

public @NonNull FrameData copy()

Utility method which makes a copy of the items in this object (including copying the items in states into a new List). This is used internally to create a copy to pass along to listeners to avoid having a reference to the internally-mutable FrameData object.

public final long getFrameDurationUiNanos()

The time spent in the UI portion of this frame (in nanoseconds). This is essentially the time spent on the UI thread to draw this frame, but does not include any time spent on the RenderThread.

public final long getFrameStartNanos()

These backing fields are used to enable mutation of an existing FrameData object, to avoid allocating a new object on every frame for sending out to listeners.

public final @NonNull List<@NonNull StateInfo> getStates()

The UI/app state during this frame. This is the information set by the app, or by other library code, that can be analyzed later to determine the UI state that was current when jank occurred.

public final boolean isJank()

Whether this frame was determined to be janky, meaning that its duration exceeds the duration determined by the system to indicate jank (@see JankStats.jankHeuristicMultiplier).