android-属性动画2

tea9

发布于 2022-07-16 16:31:59

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发布于 2022-07-16 16:31:59

文章被收录于专栏：tea9的博客

http://blog.csdn.net/yegongheng/article/details/38435553 #######ObjectAnimator ofFloat 对象，属性名（对象存在get set的属性），变化的范围

一组属性动画

ImageView imageView= (ImageView) findViewById(R.id.img);
//旋转360度
ObjectAnimator.ofFloat(imageView,"rotation",0f,360f).setDuration(1000).start();
//x坐标变换
ObjectAnimator.ofFloat(imageView,"translationX",0f,200f).setDuration(1000).start();
//y坐标变换
ObjectAnimator.ofFloat(imageView,"translationY",0f,200f).setDuration(1000).start();

一组属性动画常见的属性

PropertyValuesHolder p1=PropertyValuesHolder.ofFloat("rotation",0f,360f);
PropertyValuesHolder p2=PropertyValuesHolder.ofFloat("translationX",0f,200f);
PropertyValuesHolder p3=PropertyValuesHolder.ofFloat("translationY",0f,200f);
ObjectAnimator.ofPropertyValuesHolder(imageView,p1,p2,p3).setDuration(1000).start();

用AnimatorSet 执行一组动画可以设置执行顺序

ObjectAnimator oa1=ObjectAnimator.ofFloat(imageView,"rotation",0f,360f);
ObjectAnimator oa2=ObjectAnimator.ofFloat(imageView,"translationX",0f,200f);
ObjectAnimator oa3=ObjectAnimator.ofFloat(imageView,"translationY",0f,200f);
AnimatorSet set=new AnimatorSet();
//一起执行
//set.playTogether(oa1,oa2,oa3);
//依次执行
//set.playSequentially(oa1,oa2,oa3);
//3  2一起执行
set.play(oa2).with(oa3);
//执行完 2在执行1
set.play(oa1).after(oa2);
set.setDuration(1000);
set.start();

#######动画的监听（监听动画的开始结束取消 …）

ObjectAnimator objectAnimator=ObjectAnimator.ofFloat(v,"alpha",0f,1f);
//全部重写
objectAnimator.addListener(new Animator.AnimatorListener() {
    @Override
    public void onAnimationStart(Animator animation) {

    }

    @Override
    public void onAnimationEnd(Animator animation) {
        Toast.makeText(AnimationListenEventActivity.this,"anim end",Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onAnimationCancel(Animator animation) {

    }

    @Override
    public void onAnimationRepeat(Animator animation) {

    }
});


//按 需求重写
objectAnimator.addListener(new AnimatorListenerAdapter() {
    @Override
    public void onAnimationEnd(Animator animation) {
        super.onAnimationEnd(animation);
        Toast.makeText(AnimationListenEventActivity.this,"anim stop",Toast.LENGTH_SHORT).show();
    }
});
objectAnimator.setDuration(1000);
objectAnimator.start();

两种方式第一种实例化 AnimatorListener 需要重写所有监听第二种实例化 AnimatorListenerAdapter 需要哪个监听就重写哪个

#######valueAnimator

Valueanimator实现的定时器 5秒内从0走到100 在onAnimationUpdate给button重新赋值

final Button button=(Button)v;
ValueAnimator valueAnimator=ValueAnimator.ofInt(0,100);
valueAnimator.setDuration(5000);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator animation) {
        //获取每次修改的值
        Integer value= (Integer) animation.getAnimatedValue();
        button.setText(""+value);
    }
});

valueAnimator.start();

代码 https://github.com/shaomiao/PropertyAnimationDemo

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