dialog旋转动画效果

参考这篇文章:https://blog.csdn.net/student9128/article/details/77324498

自己定义一个旋转的类。

/**
 * An animation that rotates the view on the Y axis between two specified angles.
 * This animation also adds a translation on the Z axis (depth) to improve the effect.
 */
public class Rotate3dAnimation extends Animation {
    private final float mFromDegrees;
    private final float mToDegrees;
    private final float mCenterX;
    private final float mCenterY;
    private final float mDepthZ;
    private final boolean mReverse;
    private Camera mCamera;

    /**
     * Creates a new 3D rotation on the Y axis. The rotation is defined by its
     * start angle and its end angle. Both angles are in degrees. The rotation
     * is performed around a center point on the 2D space, definied by a pair
     * of X and Y coordinates, called centerX and centerY. When the animation
     * starts, a translation on the Z axis (depth) is performed. The length
     * of the translation can be specified, as well as whether the translation
     * should be reversed in time.
     *
     * @param fromDegrees the start angle of the 3D rotation //起始角度
     * @param toDegrees the end angle of the 3D rotation //结束角度
     * @param centerX the X center of the 3D rotation //x中轴线
     * @param centerY the Y center of the 3D rotation //y中轴线
     * @param reverse true if the translation should be reversed, false otherwise//是否反转
     */
    public Rotate3dAnimation(float fromDegrees, float toDegrees,
            float centerX, float centerY, float depthZ, boolean reverse) {
        mFromDegrees = fromDegrees;
        mToDegrees = toDegrees;
        mCenterX = centerX;
        mCenterY = centerY;
        mDepthZ = depthZ;//Z轴移动的距离，这个来影响视觉效果，可以解决flip animation那个给人看似放大的效果
        mReverse = reverse;
    }

    @Override
    public void initialize(int width, int height, int parentWidth, int parentHeight) {
        super.initialize(width, height, parentWidth, parentHeight);
        mCamera = new Camera();
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        final float fromDegrees = mFromDegrees;
        float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);

        final float centerX = mCenterX;
        final float centerY = mCenterY;
        final Camera camera = mCamera;

        final Matrix matrix = t.getMatrix();

        Log.i("interpolatedTime", interpolatedTime+"");
        camera.save();
        if (mReverse) {
            camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
        } else {
            camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
        }
        camera.rotateY(degrees);
        camera.getMatrix(matrix);
        camera.restore();

        matrix.preTranslate(-centerX, -centerY);
        matrix.postTranslate(centerX, centerY);
    }
}

下面这个是调用的方式

@BindView(R.id.dialog_container) LinearLayout container;
@BindView(R.id.dialog_info) LinearLayout dialogInfo;
@BindView(R.id.dialog_input) LinearLayout dialogInput;

/**翻转动画*/
private boolean isOpen = false;
private int centerX;
private int centerY;
private int depthZ = 700;
/**修改此处可以改变距离来达到你满意的效果*/
private int duration = 300;
/**动画时间*/
private Rotate3dAnimation openAnimation;
private Rotate3dAnimation closeAnimation;





private void startAnimation() {
        //接口回调传递参数
        centerX = container.getWidth() / 2;
        centerY = container.getHeight() / 2;
        if (openAnimation == null) {
            initOpenAnim();
            initCloseAnim();
        }
        //用作判断当前点击事件发生时动画是否正在执行
        if (openAnimation.hasStarted() && !openAnimation.hasEnded()) {
            return;
        }
        if (closeAnimation.hasStarted() && !closeAnimation.hasEnded()) {
            return;
        }
        //判断动画执行
        if (isOpen) {
            container.startAnimation(openAnimation);
        } else {
            container.startAnimation(closeAnimation);
        }
        isOpen = !isOpen;
    }

    /**
     *注意旋转角度
     */
    private void initOpenAnim() {
        //从0到90度，顺时针旋转视图，此时reverse参数为true，达到90度时动画结束时视图变得不可见，
        openAnimation = new Rotate3dAnimation(0, 90, centerX, centerY, depthZ, true);
        openAnimation.setDuration(duration);
        openAnimation.setFillAfter(true);
        openAnimation.setInterpolator(new AccelerateInterpolator());
        openAnimation.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {}
            @Override
            public void onAnimationRepeat(Animation animation) {}
            @Override
            public void onAnimationEnd(Animation animation) {
                dialogInfo.setVisibility(View.GONE);
                dialogInput.setVisibility(View.VISIBLE);
                //从270到360度，顺时针旋转视图，此时reverse参数为false，达到360度动画结束时视图变得可见
                Rotate3dAnimation rotateAnimation = new Rotate3dAnimation(270, 360, centerX, centerY, depthZ, false);
                rotateAnimation.setDuration(duration);
                rotateAnimation.setFillAfter(true);
                rotateAnimation.setInterpolator(new DecelerateInterpolator());
                container.startAnimation(rotateAnimation);
            }
        });
    }


    private void initCloseAnim() {
        closeAnimation = new Rotate3dAnimation(360, 270, centerX, centerY, depthZ, true);
        closeAnimation.setDuration(duration);
        closeAnimation.setFillAfter(true);
        closeAnimation.setInterpolator(new AccelerateInterpolator());
        closeAnimation.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {}
            @Override
            public void onAnimationRepeat(Animation animation) {}
            @Override
            public void onAnimationEnd(Animation animation) {
                dialogInput.setVisibility(View.VISIBLE);
                dialogInfo.setVisibility(View.GONE);
                Rotate3dAnimation rotateAnimation = new Rotate3dAnimation(90, 0, centerX, centerY, depthZ, false);
                rotateAnimation.setDuration(duration);
                rotateAnimation.setFillAfter(true);
                rotateAnimation.setInterpolator(new DecelerateInterpolator());
                container.startAnimation(rotateAnimation);
            }
        });
    }