安卓kotlin添加按钮点击缩放效果

fun View.zoomDo(scale: Float = 0.95f, duration: Long = 150, isEnable: Boolean = true) {//按钮点击缩放效果
    var starttt = System.currentTimeMillis()
    var chatt = System.currentTimeMillis()

    this.setOnTouchListener { _, event ->
        if (isEnable) {
            when (event.action) {
                MotionEvent.ACTION_DOWN -> {
                    starttt = System.currentTimeMillis()
                    this.animate().scaleX(scale).scaleY(scale).setDuration(duration).start()
                }
                MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
                    chatt = System.currentTimeMillis() - starttt
                    if (chatt > 140)  {
                        this.animate().scaleX(1f).scaleY(1f).setDuration(duration).start()
                    }else{
                        afterUIDo((duration-chatt).toInt()) {
                            this.animate().scaleX(1f).scaleY(1f).setDuration(duration).start()
                        }
                    }
                }
            }
        }
        // 点击事件处理，交给View自身
        this.onTouchEvent(event)
    }
}

v1.zoomDo()

方案解析

判断手指点击接触时间，显示完整缩放效果动画
因为是Kotlin拓展，添加isEnable控制某些情况不出现点击动画