android 属性动画抖动,android使用属性动画执行抖动效果

本文介绍两个视觉动画函数:nope和tada,nope通过平滑的往返移动创建视图动画,而tada则涉及缩放和旋转,适用于移动端或UI效果。关键展示了如何使用ObjectAnimator和PropertyValuesHolder创建动态效果。

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public static ObjectAnimator nope(View view) {

int delta = view.getResources().getDimensionPixelOffset(R.dimen.spacing_medium);

PropertyValuesHolder pvhTranslateX = PropertyValuesHolder.ofKeyframe(View.TRANSLATION_X,

Keyframe.ofFloat(0f, 0),

Keyframe.ofFloat(.10f, -delta),

Keyframe.ofFloat(.26f, delta),

Keyframe.ofFloat(.42f, -delta),

Keyframe.ofFloat(.58f, delta),

Keyframe.ofFloat(.74f, -delta),

Keyframe.ofFloat(.90f, delta),

Keyframe.ofFloat(1f, 0f)

);

return ObjectAnimator.ofPropertyValuesHolder(view, pvhTranslateX).

setDuration(500);

}

第二种效果

public static ObjectAnimator tada(View view) {         return tada(view, 1f);     }          public static ObjectAnimator tada(View view, float shakeFactor) {         PropertyValuesHolder pvhScaleX = PropertyValuesHolder.ofKeyframe(View.SCALE_X,                 Keyframe.ofFloat(0f, 1f),                 Keyframe.ofFloat(.1f, .9f),                 Keyframe.ofFloat(.2f, .9f),                 Keyframe.ofFloat(.3f, 1.1f),                 Keyframe.ofFloat(.4f, 1.1f),                 Keyframe.ofFloat(.5f, 1.1f),                 Keyframe.ofFloat(.6f, 1.1f),                 Keyframe.ofFloat(.7f, 1.1f),                 Keyframe.ofFloat(.8f, 1.1f),                 Keyframe.ofFloat(.9f, 1.1f),                 Keyframe.ofFloat(1f, 1f)         );         PropertyValuesHolder pvhScaleY = PropertyValuesHolder.ofKeyframe(View.SCALE_Y,                 Keyframe.ofFloat(0f, 1f),                 Keyframe.ofFloat(.1f, .9f),                 Keyframe.ofFloat(.2f, .9f),                 Keyframe.ofFloat(.3f, 1.1f),                 Keyframe.ofFloat(.4f, 1.1f),                 Keyframe.ofFloat(.5f, 1.1f),                 Keyframe.ofFloat(.6f, 1.1f),                 Keyframe.ofFloat(.7f, 1.1f),                 Keyframe.ofFloat(.8f, 1.1f),                 Keyframe.ofFloat(.9f, 1.1f),                 Keyframe.ofFloat(1f, 1f)         );                  //旋转 //        PropertyValuesHolder pvhRotate = PropertyValuesHolder.ofKeyframe(View.ROTATION, //                Keyframe.ofFloat(0f, 0f), //                Keyframe.ofFloat(.1f, -3f * shakeFactor), //                Keyframe.ofFloat(.2f, -3f * shakeFactor), //                Keyframe.ofFloat(.3f, 3f * shakeFactor), //                Keyframe.ofFloat(.4f, -3f * shakeFactor), //                Keyframe.ofFloat(.5f, 3f * shakeFactor), //                Keyframe.ofFloat(.6f, -3f * shakeFactor), //                Keyframe.ofFloat(.7f, 3f * shakeFactor), //                Keyframe.ofFloat(.8f, -3f * shakeFactor), //                Keyframe.ofFloat(.9f, 3f * shakeFactor), //                Keyframe.ofFloat(1f, 0) //        );         return ObjectAnimator.ofPropertyValuesHolder(view, pvhScaleX, pvhScaleY).                 setDuration(1000);     }

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