Question

我的布局文件中定义了一个按钮。单击该按钮时，我将为其分配动画，如下所示：

   Animation animation = new RotateAnimation(0.0f, 360.0f,
                    Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
                    0.5f);
            animation.setRepeatCount(-1);
            animation.setDuration(2000);
mybutton.setAnimation(animation);

到目前为止，一切正常。但是，当我在按钮定义中专门为我的按钮android:background="@null"设置任何背景时会出现问题。

有关如何解决此问题的任何想法？谢谢。

Answer 1

我刚刚在我的项目中试过这个，它适用于带背景的按钮。

private ObjectAnimator rotationAnimator;

以及控制动画的功能

private void startAnimation(int animationDuration) {

    if (rotationAnimator == null || !rotationAnimator.isRunning()) {
        // You can tweak this to your needs
        Keyframe kf0 = Keyframe.ofFloat(0f, 0f);
        Keyframe kf2 = Keyframe.ofFloat(0.5f, 180f);
        Keyframe kf1 = Keyframe.ofFloat(1f, 360f);

        PropertyValuesHolder pvhRotation = PropertyValuesHolder.ofKeyframe("rotation", kf0, kf1, kf2);
        rotationAnimator = ObjectAnimator.ofPropertyValuesHolder(your_button_here, pvhRotation);
        rotationAnimator.setRepeatCount(ObjectAnimator.INFINITE);
        rotationAnimator.setInterpolator(new LinearInterpolator());
        rotationAnimator.setDuration(animationDuration);
        rotationAnimator.start();
    }
    else {
        Log.d("Animation", "I am already running!");
    }
}

private void stopAnimation() {
    if (rotationAnimator != null) {
        rotationAnimator.cancel();
        rotationAnimator = null;
    }
}

private boolean getAnimationRunning() {
    return rotationAnimator != null && rotationAnimator.isRunning();
}

动画不适用于带背景的按钮

1 个答案: