如何在没有按钮的android studio中来回淡入淡出

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha
        android:fromAlpha="0.0"
        android:toAlpha="1.0"
        android:duration="1000" />
    <alpha
        android:fromAlpha="1.0"
        android:toAlpha="0.0"
        android:duration="1000"
        android:startOffset="2000" />
</set>

import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private View view;

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

        view = findViewById(R.id.view);

        Animation animation = AnimationUtils.loadAnimation(this, R.anim.fade);
        view.startAnimation(animation);
    }
}