Sample - Height animation using ObjectAnimator

MainActivity.java

import android.animation.ObjectAnimator;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.util.Property;
import android.view.View;
import android.view.animation.DecelerateInterpolator;
import android.widget.FrameLayout;

public class MainActivity extends AppCompatActivity {

    // Log tag
    private static final String TAG = "MainActivity";

    boolean isExpanded = true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final FrameLayout headerLayout = (FrameLayout) findViewById(R.id.header);
        headerLayout.setOnClickListener(new View.OnClickListener() {
            @Override public void onClick(View v) {
                animateHeightTo(headerLayout, isExpanded
                        ? (v.getHeight() / 3)
                        : ((View) v.getParent()).getHeight());
                isExpanded = !isExpanded;
            }
        });
    }

    private void animateHeightTo(@NonNull View view, int height) {
        final int currentHeight = view.getHeight();
        ObjectAnimator animator = ObjectAnimator.ofInt(view, new HeightProperty(), currentHeight, height);
        animator.setDuration(300);
        animator.setInterpolator(new DecelerateInterpolator());
        animator.start();
    }

    static class HeightProperty extends Property<View, Integer> {

        public HeightProperty() {
            super(Integer.class, "height");
        }

        @Override public Integer get(View view) {
            return view.getHeight();
        }

        @Override public void set(View view, Integer value) {
            view.getLayoutParams().height = value;
            view.setLayoutParams(view.getLayoutParams());
        }
    }
}