超簡單的android 流星雨動畫 流星動畫

1、直接看效果

2、佈局文件

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:background="@mipmap/bg"
    android:orientation="vertical"
    tools:context=".MainActivity">


    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/dot"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.711" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/dot"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.273"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.947" />

   

</androidx.constraintlayout.widget.ConstraintLayout>

2、代碼實現

        val animator = ValueAnimator.ofInt(-2000, 100)
        animator.duration = 2000
        animator.repeatCount = -1
        animator.addUpdateListener { animation ->
            val value = animation.animatedValue as Int
            Log.e("ddd", "onCreate: $value")
            imageView1.x = value.toFloat() + 600
            imageView1.y = -value.toFloat()
            
            imageView2.x = value.toFloat() + 1600
            imageView2.y = -value.toFloat()
        }

        imageView1.setOnClickListener {
            animator.start()
        }