Image View onclick on Kotlin

Question

I create a function to make the image view zoom able when clicked, but i have some trouble when copying the code from java activity to kotlin language. The ofFloat code is showing red underline and i don't know how to fix it. I already try to fix it but still not working for me. I'm a newbie in kotlin

and this is my code

@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
private fun zoomImageFromThumb(thumbView: View, imageResId: Int) {
    if (mCurrentAnimator != null) {
        mCurrentAnimator!!.cancel()
    }

    val expandedImageView = activity.findViewById<View>(
            R.id.expanded_image) as ImageView
    expandedImageView.setImageResource(imageResId)

    val startBounds = Rect()
    val finalBounds = Rect()
    val globalOffset = Point()

    thumbView.getGlobalVisibleRect(startBounds)
    activity.findViewById<View>(R.id.container)
            .getGlobalVisibleRect(finalBounds, globalOffset)
    startBounds.offset(-globalOffset.x, -globalOffset.y)
    finalBounds.offset(-globalOffset.x, -globalOffset.y)

    val startScale: Float
    if (finalBounds.width().toFloat() / finalBounds.height() > startBounds.width().toFloat() / startBounds.height()) {
        // Extend start bounds horizontally
        startScale = startBounds.height().toFloat() / finalBounds.height()
        val startWidth = startScale * finalBounds.width()
        val deltaWidth = (startWidth - startBounds.width()) / 2
        startBounds.left -= deltaWidth.toInt()
        startBounds.right += deltaWidth.toInt()
    } else {
        // Extend start bounds vertically
        startScale = startBounds.width().toFloat() / finalBounds.width()
        val startHeight = startScale * finalBounds.height()
        val deltaHeight = (startHeight - startBounds.height()) / 2
        startBounds.top -= deltaHeight.toInt()
        startBounds.bottom += deltaHeight.toInt()
    }

    thumbView.alpha = 0f
    expandedImageView.visibility = View.VISIBLE

    expandedImageView.pivotX = 0f
    expandedImageView.pivotY = 0f

    // scale properties (X, Y, SCALE_X, and SCALE_Y).
    val set = AnimatorSet()
    set
            .play(ObjectAnimator.ofFloat<View>(expandedImageView, View.X,
                    startBounds.left, finalBounds.left))
            .with(ObjectAnimator.ofFloat<View>(expandedImageView, View.Y,
                    startBounds.top, finalBounds.top))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_X,
                    startScale, 1f)).with(ObjectAnimator.ofFloat(expandedImageView,
            View.SCALE_Y, startScale, 1f))
    set.duration = mShortAnimationDuration.toLong()
    set.interpolator = DecelerateInterpolator()
    set.addListener(object : AnimatorListenerAdapter() {
        override fun onAnimationEnd(animation: Animator) {
            mCurrentAnimator = null
        }

        override fun onAnimationCancel(animation: Animator) {
            mCurrentAnimator = null
        }
    })
    set.start()
    mCurrentAnimator = set

    expandedImageView.setOnClickListener {
        if (mCurrentAnimator != null) {
            mCurrentAnimator!!.cancel()
        }

        // back to their original values.
        val set = AnimatorSet()
        set.play(ObjectAnimator
                .ofFloat<View>(expandedImageView, View.X, startBounds.left))
                .with(ObjectAnimator
                        .ofFloat<View>(expandedImageView,
                                View.Y, startBounds.top))
                .with(ObjectAnimator
                        .ofFloat(expandedImageView,
                                View.SCALE_X, startScale))
                .with(ObjectAnimator
                        .ofFloat(expandedImageView,
                                View.SCALE_Y, startScale))
        set.duration = mShortAnimationDuration.toLong()
        set.interpolator = DecelerateInterpolator()
        set.addListener(object : AnimatorListenerAdapter() {
            override fun onAnimationEnd(animation: Animator) {
                thumbView.alpha = 1f
                expandedImageView.visibility = View.GONE
                mCurrentAnimator = null
            }

            override fun onAnimationCancel(animation: Animator) {
                thumbView.alpha = 1f
                expandedImageView.visibility = View.GONE
                mCurrentAnimator = null
            }
        })
        set.start()
        mCurrentAnimator = set
    }
}

Answer 1

Convert your Rect's bound values from int to float. You are passing startBounds top, left, etc. in your ObjectAnimator.ofFloat method which are int values. But ofFloat method only takes float values.

Just use toFloat() to convert int to float:

ObjectAnimator.ofFloat<View>(expandedImageView, View.X,
                startBounds.left, finalBounds.left.toFloat())