import android.animation.ValueAnimator;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        final TextView tv = (TextView) findViewById(R.id.tv_values);

        ValueAnimator va =  ValueAnimator.ofInt(0,100);

        va.setDuration(15000);

        va.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

            @Override

            public void onAnimationUpdate(ValueAnimator animation) {

                Integer value = (Integer) animation.getAnimatedValue();

                tv.setText(""+value);

            }

        });

        va.start();

    }

}