I use Code A to draw a text with Compose, and I can use either Code B or Code C to get the height of the string.
I hope to get the width of the String var label="Hello, world!", how can I do ?
Code A
val paintText = TextPaint().also {
it.isAntiAlias = true
it.color = Color.Red.toArgb()
it.textSize = 30f
}
var label="Hello, world!"
it.nativeCanvas.drawText( label, x, y, paintText )
Code B
val fontHeight = paintText.textSize
Code C
val fm= paintText.fontMetrics
val fontHeight: Float = fm.descent - fm.ascent
Related
I want to do calculations with numbers separated by thousands (comma), and the result will be formatted in thousands separated (comma) as well. Example:
var editText1 = **12,520.00**
var editText2 = **52,345.00**
var result = **64,825.00**
//
var editText1 = **12,520**
var editText2 = **52,345**
var result = **64,825.00**
=====================================
I just tried to format the result according to the separation in thousands (comma) of the values that I would receive.
//formats
decimalSymbols = DecimalFormatSymbols(Locale.US)
format="##,###.##"
decimal = DecimalFormat(format, decimalSymbols)
decimal.roundingMode = RoundingMode.CEILING
//Variables that will receive the values
val prov = profit.text.toString().toDouble()
val cust = costs.text.toString().toDouble()
val amort = amortizacoes.text.toString().toDouble()
val jur = interest.text.toString().toDouble()
//Formatting the result in BigDecimal
result val = (prov - cost - amort - jur) * 0.32
val parsed = BigDecimal(result)
val formatResult = decimal.format(parsed)
tax.setText(formatResult.toString())
Simply remove all commas from the string value:
value= value.replace(",", "")
Do your calculations
And finally, you can use format to decorate and show them with commas, with:
"%,d".format(value)
Tested with JVM and Kotlin v1.8.0.
Here is the playground link: https://pl.kotl.in/pXpev-dei
Code snippet, pasted here:
fun main() {
var editText1 = "12,520.00";
var editText2 = "52,345.00";
// var result = **64,825.00**
editText1 = editText1.replace(",","");
editText2 = editText2.replace(",","");
var resDouble = editText1.toDouble() * editText2.toDouble();
val res = "%,f".format(resDouble)
println(res)
}
In Barchart show x values from column belongs to one label more than 2 two but should be one.
viewModel.reportMounthData.observe(this, Observer { reportModelList->
val barChart = binding.idBarChartMounth
barChart.setScaleEnabled(false)
val entries: ArrayList<BarEntry> = ArrayList()
var i=0
reportModelList.forEach { reportModel->
entries.add(BarEntry(reportModel.YigilganBonus.toFloat(), i))
i++
}
val bardataset = BarDataSet(entries, "Oylik maoshlar miqdori")
val labels = ArrayList<String>()
reportModelList.sortedBy { it.oy }.forEach { reportModel ->
labels.add(mounthSalary(reportModel.oy))
}
val data = BarData(labels, bardataset)
barChart.data = data // set the data and list of labels into chart
barChart.setDescription("\uD83D\uDEE0 Oylik maosh statistikasi") // set the description
// bardataset.setColors(ColorTemplate.COLORFUL_COLORS)
barChart.animateY(2500)
})
enter image description here
it works perfectly until the values reach 6. If there are more than 6, a defect may occur naturally. they said that the main reason for this is that it will not fit on the screen
Halo i am trying to create barchart using MPAndroid Library but icant how to use it when i send json from php
echo json_encode($output);
and the output contain 2 data that is hari and total_jual
$rowdata[]=array('hari'=>$row['hari'],
'total_jual'=>$row['total_jual']);
in android studio i am using volley to catch jason
for(i in 0 until arr.length()){
val obj = arr.getJSONObject(i)
dataListPenjualan.add(
ClassPenjualan(
obj.getString("hari").toString(),
obj.getString("total_jual").toString()
)
)
val entries = ArrayList<BarEntry>()
val barDataSet = BarDataSet(entries, "Cells")
val labels = ArrayList<String>()
labels.add(dataListPenjualan[i].hari)
//barDataSet.setColors(ColorTemplate.COLORFUL_COLORS)
barDataSet.color = resources.getColor(R.color.black)
chartPemasukan.animateY(5000)
}
the data i catch using volley i send it into class
this is my class
data class ClassPenjualan (val hari:String,
val totalPenjualan:String)
how can i create barchart using data i catch from php. I already try to search but many explanation is in java.
this is what i try
val entries = ArrayList<BarEntry>()
entries.add(BarEntry(dataListPenjualan[i].hari.toFloat(), i))
val barDataSet = BarDataSet(entries, "Cells")
val labels = ArrayList<String>()
labels.add(dataListPenjualan[i].hari)
val data = BarData(labels, barDataSet)
chartPemasukan.data = data // set the data and list of lables into chart
chartPemasukan.setDescription("Set Bar Chart Description") // set the description
//barDataSet.setColors(ColorTemplate.COLORFUL_COLORS)
barDataSet.color = resources.getColor(R.color.black)
chartPemasukan.animateY(5000)
Your code entries.add(BarEntry(dataListPenjualan[i].hari.toFloat(), i)) is wrong.
just try entries.add(BarEntry(i,dataListPenjualan[i].hari.toFloat()))
below code is my demo
val values = ArrayList<BarEntry>()
var i = 0
while (i < xValueCount) {
val yValue = (Math.random() * (100)).toFloat()
values.add(BarEntry(i.toFloat(), yValue))
i++
}
val set1: BarDataSet
if (chart.data != null &&
chart.data.dataSetCount > 0) {
set1 = chart.data.getDataSetByIndex(0) as BarDataSet
set1.values = values
chart.data.notifyDataChanged()
chart.notifyDataSetChanged()
} else {
set1 = BarDataSet(values, "speed")
//绘制图标
set1.setDrawIcons(false)
//绘制数值
set1.setDrawValues(false)
set1.color = ContextCompat.getColor(mContext, getBarHighColorByDataType(false))
set1.highLightColor = ContextCompat.getColor(mContext, getBarHighColorByDataType(true))
set1.highLightAlpha = 255
val dataSets = ArrayList<IBarDataSet>()
dataSets.add(set1)
val data = BarData(dataSets)
data.setValueTextSize(10f)
//barWith = 柱宽度/（柱宽度+旁边一处空白宽度）
data.barWidth = when (dataType) {
0 -> 0.37f
1 -> 0.52f
2 -> 0.3f
else -> 0.43f
}
chart.data = data
}
I have an MPAndroidChart line chart that shows dates on the xaxis & weights on the yaxis. As it is, the data points along the xaxis are all evenly spaced, but I'd like to make them relative to the time period between each weight entry. Try as I might, I can't find anything in the MPAndroidChart documentation that describes how to do this, or if it's even supported. Can anyone point me in the right direction here?
Here is the code to create the chart (with the result being even spacing):
private fun loadChart(weightList: List<FormattedWeight>) {
if (weightList.isEmpty()) { return }
val weights = ArrayList<Entry>()
val dates = ArrayList<Date>()
for (i in weightList.indices) {
val weight = weightList[i]
weights.add(Entry(i.toFloat(), weight.Weight!!.toFloat()))
dates.add(weight.WeightDate!!)
}
val dataSet = LineDataSet(weights, "Weights")
dataSet.mode = LineDataSet.Mode.LINEAR
val xaxis = binding.weightChart.xAxis
xaxis.granularity=2f
dataSet.color = Color.BLUE
dataSet.setCircleColor(Color.BLUE)
xaxis.position = XAxis.XAxisPosition.BOTTOM
xaxis.valueFormatter = object : ValueFormatter() {
private val mFormat = SimpleDateFormat.getDateInstance(SimpleDateFormat.SHORT)
override fun getFormattedValue(value: Float): String {
return try {
mFormat.format(dates[value.toInt()])
} catch (e: Exception) {
""
}
}
}
binding.weightChart.data = LineData(dataSet)
binding.weightChart.description.isEnabled = false
binding.weightChart.legend.isEnabled = false
binding.weightChart.invalidate()
binding.weightChart.moveViewToX(weights[weights.size - 1].y)
}
Even spacing
Relative spacing
I figured out that the xaxis spacing is set in
Entry(float x, float y)
If you set the x parameter to evenly incremented numbers (eg: 1, 2, 3...) you will get evenly spaced data points. However if you set them to varying increments (eg: 1, 1.3, 2.2...), you'll get relative spacing. So here's the code I used to achieve this:
val spacing = calcRelativeSpacing(weightList)
for (i in weightList.indices) {
val weight = weightList[i]
weights.add(Entry(spacing[i], weight.Weight!!.toFloat()))
dates.add(weight.WeightDate!!)
}
Note the call to calcRelativeSpacing(weightList):
private fun calcRelativeSpacing(entries: List<FormattedWeight>): ArrayList<Float> {
val startDate = Instant(entries.get(0).WeightDate)
val endDate = Instant(entries.get(entries.lastIndex).WeightDate)
val days = Days.daysBetween(startDate, endDate).days
val dayInterval = (days / entries.size).toFloat()
val spacing = ArrayList<Float>()
spacing.add(1f)
for (i in 1 until entries.size) {
spacing.add(spacing[i-1] + (Days.daysBetween(Instant(entries.get(i-1).WeightDate), Instant(entries.get(i).WeightDate)).days / dayInterval))
}
return spacing
}
The result:
I've created a Fragment to hold a BarChart and a ScrollPane - the end result will be a scrollable histogram.
I'm creating these new fragments in a seperate modal using the openModal method.
The problem that i'm having is that the BarChart doesn't seem to be updating when I call my loadData method, as shown below:
class Histogram : Fragment() {
override val root = vbox{
hgrow = Priority.ALWAYS
vgrow = Priority.ALWAYS
style{
minWidth = 1280.px
minHeight = 180.px
}
hbox{
hgrow = Priority.ALWAYS
}
}
private val bar = ScrollBar()
private var barChart = barchart("bar", CategoryAxis(), NumberAxis()){
barGap = 0.0
categoryGap = -1.0
hgrow = Priority.ALWAYS
vgrow = Priority.ALWAYS
style{
minWidth = 640.px
minHeight = 240.px
maxHeight = 480.px
}
isLegendVisible = false
}
private val s = XYChart.Series<String, Number>()
init{
root.add(barChart)
root.add(bar)
}
fun loadData(h: AlignmentHistogram){
s.data.add(XYChart.Data<String, Number>("asd", 2))
barChart.title = h.rname
/* for(i in 0..MAX_DATASET_SIZE){
if(i > h.histogram.size){
break
}
val data = XYChart.Data<String, Int>((h.firstPosition + i + 1).toString(), (h.histogram[i]))
println(data)
s.data.add(data)
}*/
s.data.add(XYChart.Data<String, Number>("asasdd", 5))
s.name = h.rname
barChart.data.add(s)
}
}
AlignmentHistogram is just a POJO with the data for the histogram and a few other details.
I'm calling the fragment with the following code:
val stage = Stage()
stage.title = "${pointer.rname} - ${selectedFile.file.name}"
val view = Histogram()
view.loadData(h)
val parent = StackPane()
stage.scene = Scene(parent, 1280.0, 360.0)
view.openModal(StageStyle.UTILITY, Modality.NONE, false, stage, false, true)
The result of this is just an empty histogram in a new modal, despite calling barChart.data.add(s)
Any ideas? Thanks in advance!
Nevermind, I solved it by passing the POJO in as the scope and putting the set-up code into the init block.
This article helped with the scope part:
Tornadofx - How to pass parameter to Fragment on every instance