android - 如何检测按钮上的连续多次点击 - 就像android开发者选项

Question

我想实现与开发者选项的 android 设置应用程序类似的行为。我的意思是当用户连续点击一个按钮 7 次并且每次点击之间有一个小的延迟时，将出现一个弹出窗口要求他在应用程序中启用隐藏功能。

我怎样才能实现这种行为？

Answer 1

我是基于看门狗的概念开发的。如果 TimerWatchDog 的实例没有在指定的时间内刷新，它就会完成这项工作。 ContinuousClicksHandler 使用 TimerWatchDog 的实例并计算点击次数。

用法:

val clicksCount = 7
val maxInterval = 1000L

val continuousClicksHandler = ContinuousClicksHandler(clicksCount, maxInterval)

continuousClicksHandler.registerCallback(object : ContinuousClicksHandler.ContinuousClicksCallback {

    override fun onContinuousClicksSuccessful() {
        println("onContinuousClicksSuccessful!")
    }

    override fun onContinuousClicksFailed() {
        println("onContinuousClicksFailed!")
    }

})

button.setOnClickListener {
    val count = continuousClicksHandler.click()
    showToast("Needs ${clicksCount - count} more clicks to succeed!")
}

ContinuousClicksHandler.kt

/**
 * @author aminography
 */
class ContinuousClicksHandler(
    private val clicksCount: Int,
    maxInterval: Long
) {

    private var callback: ContinuousClicksCallback? = null
    private val timerWatchDog = TimerWatchDog(maxInterval)
    private var currentClicks = 0

    fun click(): Int {
        if (++currentClicks == clicksCount) {
            timerWatchDog.cancel()
            currentClicks = 0
            callback?.onContinuousClicksSuccessful()
        } else {
            timerWatchDog.refresh {
                currentClicks = 0
                callback?.onContinuousClicksFailed()
            }
        }
        return currentClicks
    }

    fun registerCallback(callback: ContinuousClicksCallback) {
        this.callback = callback
    }

    interface ContinuousClicksCallback {

        fun onContinuousClicksSuccessful()

        fun onContinuousClicksFailed()
    }

}

TimerWatchDog.kt

import java.util.*

/**
 * @author aminography
 */
class TimerWatchDog(private val timeout: Long) {

    private var timer: Timer? = null

    fun refresh(job: () -> Unit) {
        timer?.cancel()
        timer = Timer()
        timer?.schedule(object : TimerTask() {
            override fun run() = job.invoke()
        }, timeout)
    }

    fun cancel() = timer?.cancel()

}