101 lines
3.5 KiB
Kotlin
101 lines
3.5 KiB
Kotlin
package com.danilafe.fencelessgrazing
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import android.os.Bundle
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import android.view.LayoutInflater
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import android.view.View
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import android.view.ViewGroup
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import android.widget.Toast
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import androidx.fragment.app.Fragment
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import com.android.volley.RequestQueue
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import com.android.volley.Response
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import com.android.volley.toolbox.Volley
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import com.danilafe.fencelessgrazing.model.CollarDistance
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import com.danilafe.fencelessgrazing.requests.DistanceTraveledRequest
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import com.github.mikephil.charting.charts.BarChart
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import com.github.mikephil.charting.data.BarData
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import com.github.mikephil.charting.data.BarDataSet
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import com.github.mikephil.charting.data.BarEntry
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import com.github.mikephil.charting.formatter.IndexAxisValueFormatter
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import com.github.mikephil.charting.utils.ColorTemplate
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/**
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* One of the tabs from the [StatisticsActivity]. Contains the graph
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* of the distance traveled by each animal, retrieved via the [DistanceTraveledRequest]
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* from the API.
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*/
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class DistanceTraveledGraph() : Fragment() {
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/**
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* The BarChart used to display the distance data.
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*/
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private lateinit var distanceTraveledChart: BarChart
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/**
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* The Volley queue used for making API requests.
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*/
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private lateinit var queue : RequestQueue
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override fun onCreateView(
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inflater: LayoutInflater,
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container: ViewGroup?,
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savedInstanceState: Bundle?
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): View? {
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val view = inflater.inflate(R.layout.distance_traveled_layoyt, container, false)
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distanceTraveledChart = view.findViewById(R.id.distanceTraveledChart)
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return view
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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queue = Volley.newRequestQueue(requireActivity().applicationContext)
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setupChart()
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triggerRefresh()
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}
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/**
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* Send the API request to retrieve updated distance data.
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*/
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private fun triggerRefresh() {
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val activity = requireActivity()
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val sharedPrefs = activity.getSharedPreferences("FencelessGrazing", 0)
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val token = sharedPrefs.getString("token", null)!!
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val request = DistanceTraveledRequest(activity.getString(R.string.apiUrl), token,
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Response.Listener {
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updateChartData(it)
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},
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Response.ErrorListener {
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Toast.makeText(activity, "Failed to retrieve distance traveled!", Toast.LENGTH_SHORT).show()
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}
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)
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queue.add(request)
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}
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/**
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* Updates the [distanceTraveledChart] with newly retrieved distance data.
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*/
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private fun updateChartData(distances: List<CollarDistance>) {
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val entries = mutableListOf<BarEntry>()
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val labels = distances.map { c -> c.name }
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distances.forEachIndexed { i, v ->
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entries.add(BarEntry(i.toFloat(), v.distance))
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}
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val dataSet = BarDataSet(entries, "Distance Traveled")
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dataSet.colors = ColorTemplate.PASTEL_COLORS.toList()
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val data = BarData(dataSet)
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data.barWidth = 0.9f
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distanceTraveledChart.data = data
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distanceTraveledChart.xAxis.valueFormatter = IndexAxisValueFormatter(labels)
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}
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/**
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* Configure the [distanceTraveledChart] with the proper visual settings.
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*/
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private fun setupChart() {
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distanceTraveledChart.legend.textSize = 20.0f
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distanceTraveledChart.setFitBars(true)
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distanceTraveledChart.xAxis.granularity = 1.0f
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distanceTraveledChart.xAxis.isGranularityEnabled = true
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distanceTraveledChart.invalidate()
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}
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} |