LottieSample/src/debug/java/com/airbnb/lottie/samples/LottieApplication.java

package com.airbnb.lottie.samples;

import android.app.Application;
import android.support.v4.util.Pair;
import android.view.Gravity;

import com.airbnb.lottie.L;
import com.codemonkeylabs.fpslibrary.FrameDataCallback;
import com.codemonkeylabs.fpslibrary.TinyDancer;

public class LottieApplication extends Application implements ILottieApplication {

    private int droppedFrames;
    private long droppedFramesStartingNs;
    private long currentFrameNs;

    @Override
    public void onCreate() {
        super.onCreate();
        if (L.DBG) {
            TinyDancer.create()
                    .startingGravity(Gravity.TOP|Gravity.END)
                    .startingXPosition(0)
                    .startingYPosition(0)
                    .addFrameDataCallback(new FrameDataCallback() {
                        @Override
                        public void doFrame(long previousFrameNs, long currentFrameNs, int droppedFrames) {
                            LottieApplication.this.droppedFrames += droppedFrames;
                            LottieApplication.this.currentFrameNs = currentFrameNs;
                        }
                    })
                    .show(this);
        }

    }

    @Override
    public void startRecordingDroppedFrames() {
        droppedFrames = 0;
        droppedFramesStartingNs = currentFrameNs;
    }

    @Override
    public Pair<Integer, Long> stopRecordingDroppedFrames() {
        long duration = currentFrameNs - droppedFramesStartingNs;
        Pair<Integer, Long> ret = new Pair<>(droppedFrames, duration);
        droppedFrames = 0;
        return ret;
    }
}