FrameMetricsAggregator

public class FrameMetricsAggregator
extends Object

java.lang.Object
   ↳ androidx.core.app.FrameMetricsAggregator


This class can be used to record and return data about per-frame durations. It returns those results in an array per metric type, with the results indicating how many samples were recorded for each duration value. The details of the durations data are described in getMetrics().

For more information on the various metrics tracked, see the documentation for the FrameMetrics API added in API 24 as well as the GPU Profiling guide.

Summary

Constants

int ANIMATION_DURATION

A flag indicating that the metrics should track the animation duration.

int ANIMATION_INDEX

The index in the metrics array where the data for ANIMATION_DURATION is stored.

int COMMAND_DURATION

A flag indicating that the metrics should track the command duration.

int COMMAND_INDEX

The index in the metrics array where the data for SYNC_DURATION is stored.

int DELAY_DURATION

A flag indicating that the metrics should track the delay duration.

int DELAY_INDEX

The index in the metrics array where the data for DELAY_DURATION is stored.

int DRAW_DURATION

A flag indicating that the metrics should track the draw duration.

int DRAW_INDEX

The index in the metrics array where the data for DRAW_DURATION is stored.

int EVERY_DURATION

A flag indicating that the metrics should track all durations.

int INPUT_DURATION

A flag indicating that the metrics should track the input duration.

int INPUT_INDEX

The index in the metrics array where the data for INPUT_DURATION is stored.

int LAYOUT_MEASURE_DURATION

A flag indicating that the metrics should track the layout duration.

int LAYOUT_MEASURE_INDEX

The index in the metrics array where the data for LAYOUT_MEASURE_DURATION is stored.

int SWAP_DURATION

A flag indicating that the metrics should track the swap duration.

int SWAP_INDEX

The index in the metrics array where the data for COMMAND_DURATION is stored.

int SYNC_DURATION

A flag indicating that the metrics should track the sync duration.

int SYNC_INDEX

The index in the metrics array where the data for SYNC_DURATION is stored.

int TOTAL_DURATION

A flag indicating that the metrics should track the total duration.

int TOTAL_INDEX

The index in the metrics array where the data for TOTAL_DURATION is stored.

Public constructors

FrameMetricsAggregator()

Constructs a FrameMetricsAggregator object that will track TOTAL_DURATION metrics.

FrameMetricsAggregator(int metricTypeFlags)

Constructs a FrameMetricsAggregator object that will track the metrics specified bty metricTypeFlags, which is a value derived by OR'ing together metrics constants such as TOTAL_DURATION to specify all metrics that should be tracked.

Public methods

void add(Activity activity)

Starts recording frame metrics for the given activity.

SparseIntArray[] getMetrics()

Returns the currently-collected metrics in an array of SparseIntArray objects.

SparseIntArray[] remove(Activity activity)

Stops recording metrics for activity and returns the collected metrics so far.

SparseIntArray[] reset()

Resets the metrics data and returns the currently-collected metrics.

SparseIntArray[] stop()

Stops recording metrics for all Activities currently being tracked.

Inherited methods

Constants

ANIMATION_DURATION

public static final int ANIMATION_DURATION

A flag indicating that the metrics should track the animation duration. This flag may be OR'd with the other flags here when calling FrameMetricsAggregator(int) to indicate all of the metrics that should be tracked for that activity.

Constant Value: 256 (0x00000100)

ANIMATION_INDEX

public static final int ANIMATION_INDEX

The index in the metrics array where the data for ANIMATION_DURATION is stored.

See also:

Constant Value: 8 (0x00000008)