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Merge pull request #633 from AppDevNext/TimelineActivity
Timeline activity
2 parents e30a9f0 + 5b1f8d4 commit af2c75a

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‎app/src/main/AndroidManifest.xml‎

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<activity android:name="info.appdev.chartexample.GradientActivity" />
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<activity android:name="info.appdev.chartexample.HalfPieChartActivity" />
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<activity android:name="info.appdev.chartexample.SpecificPositionsLineChartActivity" />
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<activity android:name="info.appdev.chartexample.TimeLineActivity" />
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</application>
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</manifest>

‎app/src/main/kotlin/info/appdev/chartexample/DataTools.kt‎

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@@ -13,6 +13,8 @@ import info.appdev.charting.interfaces.dataprovider.LineDataProvider
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import info.appdev.charting.interfaces.datasets.ILineDataSet
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import info.appdev.charting.utils.getSDKInt
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import timber.log.Timber
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import kotlin.math.PI
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import kotlin.math.sin
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class DataTools {
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companion object {
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fun getValues(size: Int) = VAL_102.copyOf(size)
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/**
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* Generates points for n complete sine waves.
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* @param cycles Number of complete sine graphs (n)
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* @param pointsPerCycle Number of data points to generate for each cycle
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*/
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fun generateSineWaves(cycles: Int, pointsPerCycle: Int): List<Double> {
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val totalPoints = cycles * pointsPerCycle
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val stepSize = (2 * PI * cycles) / totalPoints
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return (0 until totalPoints).map { i ->
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sin(i * stepSize)
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}
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}
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fun getMuchValues(size: Int): Array<Double?> {
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var result = VAL_102.copyOf(VAL_102.size)
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while (result.size < size)

‎app/src/main/kotlin/info/appdev/chartexample/TimeLineActivity.kt‎

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package info.appdev.chartexample
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import android.content.Intent
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import android.graphics.Color
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import android.os.Bundle
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import android.view.Menu
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import android.view.MenuItem
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import androidx.core.net.toUri
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import info.appdev.chartexample.DataTools.Companion.generateSineWaves
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import info.appdev.chartexample.databinding.ActivityLinechartNoseekbarBinding
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import info.appdev.chartexample.formatter.UnixTimeAxisValueFormatter
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import info.appdev.chartexample.notimportant.DemoBase
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import info.appdev.charting.components.Description
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import info.appdev.charting.components.Legend.LegendForm
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import info.appdev.charting.components.XAxis.XAxisPosition
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import info.appdev.charting.components.YAxis
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import info.appdev.charting.data.Entry
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import info.appdev.charting.data.LineData
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import info.appdev.charting.data.LineDataSet
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import info.appdev.charting.formatter.IFillFormatter
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import info.appdev.charting.interfaces.dataprovider.LineDataProvider
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import info.appdev.charting.interfaces.datasets.ILineDataSet
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class TimeLineActivity : DemoBase() {
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private lateinit var binding: ActivityLinechartNoseekbarBinding
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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binding = ActivityLinechartNoseekbarBinding.inflate(layoutInflater)
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setContentView(binding.root)
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binding.chart1.setBackgroundColor(Color.WHITE)
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binding.chart1.setDrawGridBackground(true)
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binding.chart1.setDrawBorders(true)
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// no description text
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binding.chart1.description = Description().apply {
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text = "Sinus Time Line"
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}
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binding.chart1.description.isEnabled = true
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binding.chart1.xAxis.apply {
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// enableGridDashedLine(10f, 10f, 0f)
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// this.position = XAxis.XAxisPosition.BOTH_SIDED
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isEnabled = true
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position = XAxisPosition.BOTTOM
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typeface = tfLight
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labelRotationAngle = 45f
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setDrawGridLines(false)
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// granularity = 1f // only intervals of 1 day
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labelCount = 7
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valueFormatter = UnixTimeAxisValueFormatter("yyyy-MM-dd HH:mm:ss")
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}
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// if disabled, scaling can be done on x- and y-axis separately
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binding.chart1.setPinchZoom(false)
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binding.chart1.legend.apply {
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isEnabled = false
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form = LegendForm.LINE
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}
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binding.chart1.axisLeft.apply {
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axisMaximum = 150f
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axisMinimum = -50f
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setDrawAxisLine(true)
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setDrawZeroLine(true)
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setDrawGridLines(true)
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}
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binding.chart1.axisRight.isEnabled = false
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setData(60f, TIME_OFFSET)
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binding.chart1.invalidate()
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}
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@Suppress("SameParameterValue")
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private fun setData(range: Float, timeOffset: Long) {
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val sampleEntries = generateSineWaves(3, 30)
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.mapIndexed { index, data ->
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val valueY = (data.toFloat() * range) + 50
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Entry(timeOffset + index.toFloat() * 1000, valueY)
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}.toMutableList()
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val set1: LineDataSet
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if (binding.chart1.lineData.dataSetCount > 0) {
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set1 = binding.chart1.lineData.getDataSetByIndex(0) as LineDataSet
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set1.entries = sampleEntries
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binding.chart1.lineData.notifyDataChanged()
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binding.chart1.notifyDataSetChanged()
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} else {
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// create a dataset and give it a type
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set1 = LineDataSet(sampleEntries, "DataSet 1")
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set1.axisDependency = YAxis.AxisDependency.LEFT
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set1.color = Color.rgb(255, 241, 46)
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set1.isDrawCirclesEnabled = false
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set1.lineWidth = 2f
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set1.circleRadius = 3f
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set1.fillAlpha = 255
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set1.isDrawFilledEnabled = true
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set1.fillColor = Color.WHITE
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set1.highLightColor = Color.rgb(244, 117, 117)
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set1.isDrawCircleHoleEnabled = false
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set1.fillFormatter = object : IFillFormatter {
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override fun getFillLinePosition(dataSet: ILineDataSet?, dataProvider: LineDataProvider): Float {
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// change the return value here to better understand the effect
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// return 0;
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return binding.chart1.axisLeft.axisMinimum
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}
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}
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val dataSets = ArrayList<ILineDataSet>()
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dataSets.add(set1) // add the data sets
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// create a data object with the data sets
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val data = LineData(dataSets)
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data.setDrawValues(false)
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binding.chart1.setData(data)
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}
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}
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override fun onCreateOptionsMenu(menu: Menu?): Boolean {
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menuInflater.inflate(R.menu.only_github, menu)
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return true
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}
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override fun onOptionsItemSelected(item: MenuItem): Boolean {
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when (item.itemId) {
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R.id.viewGithub -> {
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val i = Intent(Intent.ACTION_VIEW)
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i.data =
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"https://github.com/AppDevNext/AndroidChart/blob/master/app/src/main/java/info/appdev/chartexample/FilledLineActivity.kt".toUri()
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startActivity(i)
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}
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}
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return true
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}
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public override fun saveToGallery() = Unit // Intentionally left empty
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companion object {
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const val TIME_OFFSET = 1767105583L
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}
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}

‎app/src/main/kotlin/info/appdev/chartexample/formatter/UnixTimeAxisValueFormatter.kt‎

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package info.appdev.chartexample.formatter
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import info.appdev.charting.components.AxisBase
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import info.appdev.charting.formatter.IAxisValueFormatter
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import java.text.SimpleDateFormat
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import java.util.Locale
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class UnixTimeAxisValueFormatter(val format: String = "yyyy-MM-dd'T'HH:mm:ss'Z'") : IAxisValueFormatter {
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val sdf = SimpleDateFormat(format, Locale.getDefault())
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override fun getFormattedValue(value: Float, axis: AxisBase?): String {
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return sdf.format(value * 1000L)
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}
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}

‎app/src/main/kotlin/info/appdev/chartexample/notimportant/MainActivity.kt‎

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import info.appdev.chartexample.SpecificPositionsLineChartActivity
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import info.appdev.chartexample.StackedBarActivity
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import info.appdev.chartexample.StackedBarActivityNegative
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import info.appdev.chartexample.TimeLineActivity
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import info.appdev.chartexample.compose.HorizontalBarComposeActivity
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import info.appdev.chartexample.fragments.ViewPagerSimpleChartDemo
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add(ContentItem("Demonstrate and fix issues"))
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add(ContentItem("Gradient", "Show a gradient edge case", GradientActivity::class.java))
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add(ContentItem("Timeline", "Show a time line with Unix timestamp", TimeLineActivity::class.java))
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}
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}
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}

‎screenshotsToCompare9/StartTest_smokeTestStart-43-TimeLineActivity-Timeline-1SampleClick.png‎

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