Android Kotlin计算速度(时间)

所以…我已经在这个已经2天了,这让我疯狂。

我正在尝试使这个布局工作。 它应该是时间和/或速度计算器。 我一次尝试一个,但是2天后这个进展不顺利。

override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_running_calculator) var distanceView = findViewById<NumberPicker>(R.id.distanceTxtField) as TextView var timeView = findViewById<NumberPicker>(R.id.timeTxtField) as TextView var paceView = findViewById<NumberPicker>(R.id.paceTxtField) as TextView var calculateBtn = findViewById<Button>(R.id.calculateBtn) var resultView = findViewById<TextView>(R.id.textView5) 

// …………

  fun calculationPaceKm () { var stringArray = timeView.text.toString().split(":") var total = stringArray[0].toDouble() total += (stringArray[1].toDouble() / 60 ) var distanceValue = distanceView.text.toString().toDouble() var resultPaceKm = ((distanceValue / total) * 1.37).toDouble() var resultFormatPaceMiles = "%.1f pace".format(resultPaceKm) resultView.setText(resultFormatPaceMiles.toString())} kmBtn.setOnClickListener{ calculationPaceKm() } 

我不知道该怎么走…我已经得到了非常非常奇怪的结果,没有任何工作:/

谢谢

=======================

编辑

所以我编辑了我的问题,所以你可以看看我有什么。 这几乎是你给我的,但有一些调整。 我注意到它不能正确地转换我的距离,我不知道为什么。 假设我将7.37公里换算成里程。 它应该给我4.58里程,但我得到4.35里程,就好像我乘以0.59,而不是我。 我乘以0.621371

 class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val time = findViewById<NumberPicker>(R.id.time) as TextView val distance = findViewById<NumberPicker>(R.id.distance) as TextView val pace = findViewById<NumberPicker>(R.id.pace) as TextView calculate.setOnClickListener { when { time.text.isEmpty() && (distance.text.isNotEmpty() && pace.text.isNotEmpty()) -> calculatePace(null, distance.text.toString(), pace.text.toString()) distance.text.isEmpty() && (time.text.isNotEmpty() && pace.text.isNotEmpty()) -> calculatePace(time.text.toString(), null, pace.text.toString()) pace.text.isEmpty() && (time.text.isNotEmpty() && distance.text.isNotEmpty()) -> calculatePace(time.text.toString(), distance.text.toString(), null) else -> { Toast.makeText(this, "Please check all fields", Toast.LENGTH_SHORT).show() } } } } fun Double.format(digits: Int) = java.lang.String.format("%.${digits}f", this) @SuppressLint("SetTextI18n") private fun calculatePace(time: String?, distance: String?, pace: String?) { // KM Distance and KM Pace Button if (kmDistanceRadioBtn.isChecked && kmPaceRadioBtn.isChecked) when { // TIME: To calculate your time, fill in your distance and pace time == null -> { val calculatedTime = distance!!.toLong() * timeToSeconds(pace.toString()) result.text = "The runner's time is ${secondsToTime(calculatedTime)}" } // DISTANCE: To calculate your distance, fill in your time and pace distance == null -> { val calculatedDistance = (timeToSeconds(time).toDouble().div(timeToSeconds (pace.toString()).toDouble())).format(2) result.text = "Distance is $calculatedDistance KM" } // PACE: To calculate your pace, fill in your time and distance pace == null -> { // Calculate Pace val calculatedPace: Long = timeToSeconds(time).toLong() / distance.toLong() Log.i("PaceSeconds", calculatedPace.toString() + secondsToTime(calculatedPace)) result.text = "The runner's pace in KM is ${secondsToTime(calculatedPace)}" } } // Miles Distance and Miles Pace Button else if (milesDistanceRadioBtn.isChecked && milesPaceRadioBtn.isChecked) when { // TIME: To calculate your time, fill in your distance and pace time == null -> { val calculatedTime = distance!!.toLong() * timeToSeconds(pace.toString()) result.text = "The runner's time is ${secondsToTime(calculatedTime)}" } // DISTANCE: To calculate your distance, fill in your time and pace distance == null -> { val calculatedDistance = (timeToSeconds(time).toDouble().div(timeToSeconds (pace.toString()).toDouble())).format(2) result.text = "Distance is $calculatedDistance Miles" } // PACE: To calculate your pace, fill in your time and distance pace == null -> { // Calculate Pace val calculatedPace: Long = timeToSeconds(time).toLong() / distance.toLong() Log.i("PaceSeconds", calculatedPace.toString() + secondsToTime(calculatedPace)) result.text = "The runner's pace in miles is ${secondsToTime(calculatedPace)}" } // KM Distance and Miles Pace Button } else if(kmDistanceRadioBtn.isChecked && milesPaceRadioBtn.isChecked) { when { // TIME: To calculate your time, fill in your distance and pace time == null -> { val calculatedTime = distance!!.toLong() * timeToSeconds(pace.toString()) result.text = "The runner's time is ${secondsToTime(calculatedTime)}" } // DISTANCE: To calculate your distance, fill in your time and pace distance == null -> { val calculatedDistance = (timeToSeconds(time).div(timeToSeconds (pace.toString())) * 0.621371).format(2) result.text = "Distance is $calculatedDistance Miles" } // PACE: To calculate your pace, fill in your time and distance pace == null -> { // Calculate Pace val calculatedPace: Long = timeToSeconds(time).toLong() / distance.toLong() Log.i("PaceSeconds", calculatedPace.toString() + secondsToTime(calculatedPace)) result.text = "The runner's pace in miles is ${secondsToTime(calculatedPace)}" } } // Miles Distance and KM Pace Button } else if(milesDistanceRadioBtn.isChecked && kmPaceRadioBtn.isChecked) { when { // TIME: To calculate your time, fill in your distance and pace time == null -> { val calculatedTime = distance!!.toLong() * timeToSeconds(pace.toString()) result.text = "The runner's time is ${secondsToTime(calculatedTime)}" } // DISTANCE: To calculate your distance, fill in your time and pace distance == null -> { val calculatedDistance = (timeToSeconds(time).div(timeToSeconds (pace.toString())) * 0.621371).format(2) result.text = "Distance is $calculatedDistance Miles" } // PACE: To calculate your pace, fill in your time and distance pace == null -> { // Calculate Pace val calculatedPace: Long = timeToSeconds(time).toLong() / distance.toLong() Log.i("PaceSeconds", calculatedPace.toString() + secondsToTime(calculatedPace)) result.text = "The runner's pace in miles is ${secondsToTime(calculatedPace)}" } } } else{ Toast.makeText(this, "Please choose one unit", Toast.LENGTH_SHORT).show() } } // Convert Time to Seconds @SuppressLint("SimpleDateFormat") private fun timeToSeconds(time: String): Long { val dateFormat = SimpleDateFormat("mm:ss") val reference = dateFormat.parse("00:00") val date = dateFormat.parse(time) return (date.time - reference.time) / 1000L } // Convert Seconds to Time private fun secondsToTime(seconds: Long): String { val hours = seconds / 3600 val minutes = (seconds % 3600) / 60 val seconds = seconds % 60 return String.format("%02d:%02d",minutes, seconds) }} 

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MainActivity.kt

  package com.example.wave18.pacecalculator import android.annotation.SuppressLint import android.os.Bundle import android.support.v7.app.AppCompatActivity import android.util.Log import android.view.View import android.widget.TextView import kotlinx.android.synthetic.main.activity_main.* import java.text.SimpleDateFormat class MainActivity : AppCompatActivity() { // Regex for Checking Input time Format val regex = Regex("^([0-1]\\d|2[0-3]):([0-5]\\d):([0-5]\\d)\$") override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val time = findViewById<View>(R.id.time) as TextView val distance = findViewById<View>(R.id.distance) as TextView val pace = findViewById<View>(R.id.pace) as TextView calculate.setOnClickListener { when { time.text.isEmpty() && (distance.text.isNotEmpty() && pace.text.isNotEmpty()) -> { if (regex.matches(pace.text)) { calculatePace(null, distance.text.toString(), pace.text.toString()) } else { // SHOW ERROR } } distance.text.isEmpty() && (time.text.isNotEmpty() && pace.text.isNotEmpty()) -> calculatePace(time.text.toString(), null, pace.text.toString()) pace.text.isEmpty() && (time.text.isNotEmpty() && distance.text.isNotEmpty()) -> calculatePace(time.text.toString(), distance.text.toString(), null) else -> { Log.i("Error", "Something wrong You need to enter / empty values") } } } } @SuppressLint("SetTextI18n") private fun calculatePace(time: String?, distance: String?, pace: String?) { when { // TIME: To calculate your time, fill in your distance and pace time == null -> { val calulatedTime = distance!!.toLong() * timeToSeconds(pace.toString()) result.text = "The runner's time is ${secondsToTime(calulatedTime)}" } // DISTANCE: To calculate your distance, fill in your time and pace distance == null -> { val calculatedDistance = timeToSeconds(time).toDouble().div(timeToSeconds(pace.toString())) result.text = "Distance is $calculatedDistance KM" } // PACE: To calculate your pace, fill in your time and distance pace == null -> { // Calculate Pace val calculatedPace: Long = timeToSeconds(time).toLong() / distance.toLong() Log.i("PaceSeconds", calculatedPace.toString() + secondsToTime(calculatedPace)) result.text = "The runner's pace is ${secondsToTime(calculatedPace)}" } } } // Convert Time to Seconds @SuppressLint("SimpleDateFormat") private fun timeToSeconds(time: String): Long { val dateFormat = SimpleDateFormat("HH:mm:ss") val reference = dateFormat.parse("00:00:00") val date = dateFormat.parse(time) val seconds = (date.time - reference.time) / 1000L return seconds } // Convert Seconds to Time private fun secondsToTime(seconds: Long): String { val hours = seconds / 3600 val minutes = (seconds % 3600) / 60 val seconds = seconds % 60 val timeString = String.format("%02d:%02d:%02d", hours, minutes, seconds) return timeString } } 

activity_main.xml中

 <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.wave18.pacecalculator.MainActivity"> <EditText android:id="@+id/time" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="107dp" android:layout_marginStart="62dp" android:layout_marginTop="87dp" android:ems="10" android:inputType="textPersonName" android:text="01:10:10" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <EditText android:id="@+id/distance" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="106dp" android:layout_marginStart="63dp" android:layout_marginTop="28dp" android:ems="10" android:inputType="textPersonName" android:text="10" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/time" /> <EditText android:id="@+id/pace" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="107dp" android:layout_marginStart="62dp" android:layout_marginTop="25dp" android:ems="10" android:inputType="textPersonName" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/distance" /> <TextView android:id="@+id/result" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginEnd="24dp" android:layout_marginStart="24dp" android:layout_marginTop="53dp" android:text="TextView" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/pace" /> <Button android:id="@+id/calculate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="165dp" android:layout_marginStart="131dp" android:layout_marginTop="61dp" android:text="Button" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/result" /> </android.support.constraint.ConstraintLayout> 
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