我希望晶圆厂旋转每次我点击它。但经过尝试，我达到了旋转的效果。但我的问题是它只工作一次。i、 应用程序启动时出错。请帮帮我，我是这方面的初学者。下面是我使用的完整代码。
活动\u main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".MainActivity">

    <com.google.android.material.bottomappbar.BottomAppBar
        android:id="@+id/bottom_app_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:gravity="bottom"
        android:backgroundTint="@color/design_default_color_background"
        app:fabCradleMargin="15dp"
        app:menu="@menu/app_bar_layout"
        app:fabCradleVerticalOffset="20dp"
        app:fabCradleRoundedCornerRadius="40dp"/>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab_generate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:backgroundTint="#1D6837"
        android:src="@drawable/generate"
        app:layout_anchor="@id/bottom_app_bar"
        android:contentDescription="generate"
        android:clickable="true"
        app:fabCustomSize="80dp"
        app:maxImageSize="45dp"
        android:layout_marginBottom="20dp"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

主活动.java

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.OvershootInterpolator;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import static androidx.core.view.ViewCompat.animate;

public class MainActivity extends AppCompatActivity {

    private FloatingActionButton generateFab;

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

        generateFab = findViewById(R.id.fab_generate);

        generateFab.setOnClickListener ( new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final OvershootInterpolator interpolator = new OvershootInterpolator();
                animate(generateFab).
                        setInterpolator(interpolator).
                        setListener(null).
                        rotation(360f).
                        withLayer().
                        setDuration(300).
                        withStartAction(null).
                        start();

            }

        });
    }
}

基本上，我将onclicklistener添加到oncreate方法内的浮动操作按钮中