从 xml 资源加载后更新/更改 Android 中的动画

发布于 2025-01-05 18:15:37 字数 940 浏览 0 评论 0原文

从xml加载后如何更新java代码中的动画属性？

我有一个在 xml 中定义的雨滴动画。

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android"  
    android:shareInterpolator="false">
  <translate android:fromYDelta="10%p" 
    android:toYDelta="70%p"
    android:duration="2000" 
    android:repeatCount="1"
    />
   <scale
    android:interpolator="@android:anim/accelerate_decelerate_interpolator"
    android:fromXScale="1.2"
    android:toXScale=".5"
    android:fromYScale="1.2"
    android:toYScale="0.5"
    android:pivotX="50%"
    android:pivotY="50%"
    android:fillAfter="false"
    android:duration="2000" />

加载此动画后，

 rainDropAnimation =AnimationUtils.loadAnimation(this, R.anim.cloud_fall_down);

我如何更改动画的 fromYDelta ？基本上我有一些云在屏幕上移动。如果用户点击云，我想显示下雨。我不想为不同的雨滴图像提供太多的动画资源，单个动画将满足所有需要更改起点的水滴突出

原文

How can i update attribute of animation in java code after loading from xml?

I have a rain drop fall animation defined in xml.

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android"  
    android:shareInterpolator="false">
  <translate android:fromYDelta="10%p" 
    android:toYDelta="70%p"
    android:duration="2000" 
    android:repeatCount="1"
    />
   <scale
    android:interpolator="@android:anim/accelerate_decelerate_interpolator"
    android:fromXScale="1.2"
    android:toXScale=".5"
    android:fromYScale="1.2"
    android:toYScale="0.5"
    android:pivotX="50%"
    android:pivotY="50%"
    android:fillAfter="false"
    android:duration="2000" />

after loading this animation

 rainDropAnimation =AnimationUtils.loadAnimation(this, R.anim.cloud_fall_down);

how can i change fromYDelta of animation?
basically i have some cloud moving on screen. i wants to show rain if user tap on a cloud. and i don't want to have to many animation resource for different rain drop image,a single animation will serve all drop juts need to change starting point

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