沿 Android 路径动画 ImageView [英] Animate ImageView along Path Android

问题描述

我在互联网上搜索了这个，但没有成功.我需要沿路径为 ImageView 设置动画.我使用以下方法创建了一个路径:

I searched all over Internet for this with no success. I need to Animate an ImageView along a Path. I have created a Path using:

Path path = new Path()    
path.moveTo(0, 0);
path.lineTo(184,776);
path.lineTo(184,780);
path.lineTo(184,790);
path.lineTo(184,810);
path.lineTo(230, 900);

ImageView img = new ImageView(this);

有什么办法可以沿路径移动 img 吗?谢谢大家

Is there any way I can move img along path? Thank you all

推荐答案

以下是我使用的动画师:

Here are the animators I use:

目的:沿着路径路径"移动视图视图"

Purpose: Move View "view" along Path "path"

v21+:

ValueAnimator pathAnimator = ObjectAnimator.ofFloat(view, "x", "y", path)

v11+:

ValueAnimator pathAnimator = ValueAnimator.ofFloat(0.0f, 1.0f);

pathAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
float[] point = new float[2];

@Override
    public void onAnimationUpdate(ValueAnimator animation) {
        float val = animation.getAnimatedFraction();
        PathMeasure pathMeasure = new PathMeasure(path, true);
        pathMeasure.getPosTan(pathMeasure.getLength() * val, point, null);
        view.setX(point[0]);
        view.setY(point[1]);
    }
});

同:Android，沿路径移动位图?

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