Android View 从左下角放大出场

最新推荐文章于 2025-09-30 07:28:33 发布

原创最新推荐文章于 2025-09-30 07:28:33 发布 · 1.8k 阅读

CC 4.0 BY-SA版权

本文介绍了一种使用Java实现的视图动画效果，包括如何更改视图的旋转中心，并通过ObjectAnimator实现缩放动画。该动画分为三个阶段：初始放大、轻微收缩及最终恢复原状。

中心点更改为左下角：
mGenderSelectorLinearLayout.setPivotX(0);
mGenderSelectorLinearLayout.setPivotY(mGenderSelectorLinearLayout.getHeight());

中心点更改为左上角：
mGenderSelectorLinearLayout.setPivotX(0);

mGenderSelectorLinearLayout.setPivotY(0);

中心点更改为右上角：

mGenderSelectorLinearLayout.setPivotX(mGenderSelectorLinearLayout.getWidth()); mGenderSelectorLinearLayout.setPivotY(0);

中心点更改为右下角：

mGenderSelectorLinearLayout.setPivotX(mGenderSelectorLinearLayout.getWidth());
mGenderSelectorLinearLayout.setPivotY(mGenderSelectorLinearLayout.getHeight());

动画：

public void showGenderSelectorAnimation() {
    if (mGenderSelectorLinearLayout == null) {return;}
    mGenderSelectorLinearLayout.post(new Runnable() {
        @Override
        public void run() {
            mGenderSelectorLinearLayout.setPivotX(0);
            mGenderSelectorLinearLayout.setPivotY(mGenderSelectorLinearLayout.getHeight());
            ObjectAnimator scaleX = ObjectAnimator.ofFloat(mGenderSelectorLinearLayout, "scaleX", 0.0f, 1.05f);
            ObjectAnimator scaleY = ObjectAnimator.ofFloat(mGenderSelectorLinearLayout, "scaleY", 0.0f, 1.05f);
            AnimatorSet set = new AnimatorSet();
            set.play(scaleX).with(scaleY);
            set.setDuration(330);
            set.start();
            set.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    super.onAnimationEnd(animation);
                    if (mGenderSelectorLinearLayout == null) {
                        return;
                    }
                    ObjectAnimator scaleX2 = ObjectAnimator.ofFloat(mGenderSelectorLinearLayout, "scaleX", 1.05f, 0.98f);
                    ObjectAnimator scaleY2 = ObjectAnimator.ofFloat(mGenderSelectorLinearLayout, "scaleY", 1.05f, 0.98f);
                    AnimatorSet set2 = new AnimatorSet();
                    set2.play(scaleX2).with(scaleY2);
                    set2.setDuration(150);
                    set2.start();
                    set2.addListener(new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationEnd(Animator animation) {
                            super.onAnimationEnd(animation);
                            if (mGenderSelectorLinearLayout == null) {
                                return;
                            }
                            ObjectAnimator scaleX3 = ObjectAnimator.ofFloat(mGenderSelectorLinearLayout, "scaleX", 0.98f, 1.0f);
                            ObjectAnimator scaleY3 = ObjectAnimator.ofFloat(mGenderSelectorLinearLayout, "scaleY", 0.98f, 1.0f);
                            AnimatorSet set3 = new AnimatorSet();
                            set3.play(scaleX3).with(scaleY3);
                            set3.setDuration(300);
                            set3.start();
                        }
                    });
                }
            });
        }
    });
}