add statistics for bottle and sleep events

app/build.gradle.kts

@@ -60,4 +60,5 @@ dependencies {
     androidTestImplementation(libs.androidx.ui.test.junit4)
     debugImplementation(libs.androidx.ui.tooling)
     debugImplementation(libs.androidx.ui.test.manifest)
+    implementation(libs.mpandroidchart.vv310)
 }

app/src/main/AndroidManifest.xml

@@ -30,6 +30,10 @@
             android:name=".SettingsActivity"
             android:label="@string/settings_title"
             android:theme="@style/Theme.LunaTracker"/>
+        <activity
+            android:name=".StatisticsActivity"
+            android:label="@string/statistics_title"
+            android:theme="@style/Theme.LunaTracker"/>
     </application>
 
 </manifest>

app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt

@@ -6,6 +6,7 @@ import android.content.DialogInterface
 import android.content.Intent
 import android.os.Bundle
 import android.os.Handler
+import android.text.Editable
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
@@ -50,6 +51,8 @@ class MainActivity : AppCompatActivity() {
         const val TAG = "MainActivity"
         const val UPDATE_EVERY_SECS: Long = 30
         const val DEBUG_CHECK_LOGBOOK_CONSISTENCY = false
+        // list of all events
+        var allEvents = arrayListOf<LunaEvent>()
     }
 
     var logbook: Logbook? = null
@@ -145,7 +148,8 @@ class MainActivity : AppCompatActivity() {
         if (logbook == null)
             Log.w(TAG, "showLogbook(): logbook is null!")
 
-        setListAdapter(logbook?.logs ?: arrayListOf())
+        allEvents = logbook?.logs ?: arrayListOf()
+        setListAdapter(allEvents)
     }
 
     override fun onStart() {
@@ -192,10 +196,6 @@ class MainActivity : AppCompatActivity() {
         super.onStop()
     }
 
-    fun getAllEvents(): ArrayList<LunaEvent> {
-        return logbook?.logs ?: arrayListOf()
-    }
-
     fun addBabyBottleEvent(event: LunaEvent) {
         setToPreviousQuantity(event)
         askBabyBottleContent(event, true) {
@@ -363,7 +363,7 @@ class MainActivity : AppCompatActivity() {
     }
 
     fun saveEvent(event: LunaEvent) {
-        if (!getAllEvents().contains(event)) {
+        if (!allEvents.contains(event)) {
             // new event
             logEvent(event)
         }
@@ -387,9 +387,7 @@ class MainActivity : AppCompatActivity() {
         val durationTextView = dialogView.findViewById<TextView>(R.id.dialog_date_duration)
         val durationNowButton = dialogView.findViewById<Button>(R.id.dialog_date_duration_now)
         val datePicker = dialogView.findViewById<TextView>(R.id.dialog_date_picker)
-        val durationMinus15Button = dialogView.findViewById<Button>(R.id.dialog_date_duration_minus15)
         val durationMinus5Button = dialogView.findViewById<Button>(R.id.dialog_date_duration_minus5)
-        val durationPlus15Button = dialogView.findViewById<Button>(R.id.dialog_date_duration_plus15)
         val durationPlus5Button = dialogView.findViewById<Button>(R.id.dialog_date_duration_plus5)
 
         val currentDurationTextColor = durationTextView.currentTextColor
@@ -428,10 +426,8 @@ class MainActivity : AppCompatActivity() {
             onDateChange(pickedDateTime.time.time / 1000)
         }
 
-        durationMinus15Button.setOnClickListener { adjust(-15) }
         durationMinus5Button.setOnClickListener { adjust(-5) }
         durationPlus5Button.setOnClickListener { adjust(5) }
-        durationPlus15Button.setOnClickListener { adjust(15) }
 
         durationNowButton.setOnClickListener {
             val now = Calendar.getInstance().time.time / 1000
@@ -561,7 +557,7 @@ class MainActivity : AppCompatActivity() {
 
         val nextTextView = dialogView.findViewById<TextView>(R.id.notes_template_next)
         val prevTextView = dialogView.findViewById<TextView>(R.id.notes_template_prev)
-        val templates = getAllEvents().filter { it.type == event.type }.distinctBy { it.notes.trim() }.sortedBy { it.time }
+        val templates = allEvents.filter { it.type == event.type }.distinctBy { it.notes }.sortedBy { it.time }
 
         fun updateContent(current: LunaEvent) {
             val prevEvent = getPreviousSameEvent(current, templates)
@@ -616,7 +612,7 @@ class MainActivity : AppCompatActivity() {
         updateContent(event)
 
         d.setPositiveButton(android.R.string.ok) { dialogInterface, i ->
-            val notes = notesET.text.toString()
+            val notes = notesET.text.toString().trim()
 
             if (useQuantity) {
                 val quantity = qtyET.text.toString().toIntOrNull()
@@ -667,7 +663,7 @@ class MainActivity : AppCompatActivity() {
     }
 
     fun setToPreviousQuantity(event: LunaEvent) {
-        val prev = getPreviousSameEvent(event, getAllEvents())
+        val prev = getPreviousSameEvent(event, allEvents)
         if (prev != null) {
             event.quantity = prev.quantity
         }
@@ -704,6 +700,12 @@ class MainActivity : AppCompatActivity() {
     fun showEventDetailDialog(originalEvent: LunaEvent) {
         val event = LunaEvent(originalEvent)
 
+        fun eventValuesChanged(): Boolean {
+            return (event.time != originalEvent.time
+                || event.quantity != originalEvent.quantity
+                || event.notes != originalEvent.notes)
+        }
+
         // Do not update list while the detail is shown, to avoid changing the object below while it is changed by the user
         pauseLogbookUpdate = true
 
@@ -721,17 +723,59 @@ class MainActivity : AppCompatActivity() {
         emojiTextView.text = event.getTypeEmoji(this)
         descriptionTextView.text = event.getTypeDescription(this)
 
+        d.setView(dialogView)
+
+        d.setNeutralButton(R.string.dialog_event_detail_delete_button) { dialogInterface, i ->
+            deleteEvent(originalEvent)
+            dialogInterface.dismiss()
+        }
+
+        d.setNegativeButton(R.string.dialog_event_detail_save_button) { dialogInterface, i ->
+            if (eventValuesChanged()) {
+                originalEvent.time = event.time
+                originalEvent.quantity = event.quantity
+                originalEvent.notes = event.notes
+                saveEvent(originalEvent)
+            }
+
+            dialogInterface.dismiss()
+        }
+
+        d.setPositiveButton(R.string.dialog_event_detail_close_button) { dialogInterface, i ->
+            dialogInterface.dismiss()
+        }
+
+        val alertDialog = d.create()
+        alertDialog.show()
+
+        alertDialog.getButton(DialogInterface.BUTTON_NEUTRAL).setTextColor(
+            ContextCompat.getColor(this, R.color.danger)
+        )
+
+        alertDialog.setOnDismissListener {
+            // Resume logbook update
+            pauseLogbookUpdate = false
+        }
+
         val updateValues = {
             quantityTextView.text = NumericUtils(this).formatEventQuantity(event)
             notesTextView.text = event.notes
-            if (event.type == LunaEvent.TYPE_SLEEP) {
+            if (event.type == LunaEvent.TYPE_SLEEP && event.quantity > 0) {
                 dateEndTextView.text = DateUtils.formatDateTime(event.time + event.quantity)
                 dateEndTextView.visibility = View.VISIBLE
+            } else {
+                dateEndTextView.visibility = View.GONE
+            }
+
+            alertDialog.getButton(DialogInterface.BUTTON_NEGATIVE).visibility = if (eventValuesChanged()) {
+                View.VISIBLE
+            } else {
+                View.GONE
             }
         }
         updateValues()
 
-        val pickedTime = datePickerHelper(event.time, dateTextView, { newTime: Long ->
+        datePickerHelper(event.time, dateTextView, { newTime: Long ->
             event.time = newTime
             updateValues()
         })
@@ -757,40 +801,6 @@ class MainActivity : AppCompatActivity() {
             }
         }
 
-        d.setView(dialogView)
-
-        d.setNeutralButton(R.string.dialog_event_detail_delete_button) { dialogInterface, i ->
-            deleteEvent(originalEvent)
-            dialogInterface.dismiss()
-        }
-
-        d.setPositiveButton(R.string.dialog_event_detail_close_button) { dialogInterface, i ->
-            event.time = pickedTime.time.time / 1000
-
-            if (event.time != originalEvent.time
-                    || event.quantity != originalEvent.quantity
-                    || event.notes != originalEvent.notes) {
-                originalEvent.time = event.time
-                originalEvent.quantity = event.quantity
-                originalEvent.notes = event.notes
-                saveEvent(originalEvent)
-            }
-
-            dialogInterface.dismiss()
-        }
-
-        val alertDialog = d.create()
-        alertDialog.show()
-
-        alertDialog.getButton(DialogInterface.BUTTON_NEUTRAL).setTextColor(
-            ContextCompat.getColor(this, R.color.danger)
-        )
-
-        alertDialog.setOnDismissListener {
-            // Resume logbook update
-            pauseLogbookUpdate = false
-        }
-
         // show optional signature
         if (event.signature.isNotEmpty()) {
             val signatureTextEdit = dialogView.findViewById<TextView>(R.id.dialog_event_detail_type_signature)
@@ -798,8 +808,6 @@ class MainActivity : AppCompatActivity() {
             signatureTextEdit.visibility = View.VISIBLE
         }
 
-        val allEvents = getAllEvents()
-
         // create link to prevent event of the same type
         val previousTextView = dialogView.findViewById<TextView>(R.id.dialog_event_previous)
         val previousEvent = getPreviousSameEvent(event, allEvents)
@@ -1219,6 +1227,16 @@ class MainActivity : AppCompatActivity() {
                 addPlainEvent(LunaEvent(LunaEvent.TYPE_BATH))
                 dismiss()
             }
+            contentView.findViewById<View>(R.id.button_statistics).setOnClickListener {
+                if (logbook != null && !pauseLogbookUpdate) {
+                    val i = Intent(applicationContext, StatisticsActivity::class.java)
+                    i.putExtra("LOOGBOOK_NAME", logbook!!.name)
+                    startActivity(i)
+                } else {
+                    Toast.makeText(applicationContext, "No logbook selected!", Toast.LENGTH_SHORT).show()
+                }
+                dismiss()
+            }
         }.also { popupWindow ->
             popupWindow.setOnDismissListener({
                 Handler(mainLooper).postDelayed({

app/src/main/java/it/danieleverducci/lunatracker/StatisticsActivity.kt

@@ -0,0 +1,375 @@
+package it.danieleverducci.lunatracker
+
+import android.graphics.Color
+import android.os.Bundle
+import android.util.Log
+import android.view.View
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import android.widget.Spinner
+import android.widget.TextView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.github.mikephil.charting.charts.BarChart
+import com.github.mikephil.charting.data.BarData
+import com.github.mikephil.charting.data.BarDataSet
+import com.github.mikephil.charting.data.BarEntry
+import com.github.mikephil.charting.formatter.ValueFormatter
+import com.github.mikephil.charting.interfaces.datasets.IBarDataSet
+import it.danieleverducci.lunatracker.entities.LunaEvent
+import utils.DateUtils.Companion.formatTimeDuration
+import utils.NumericUtils
+import java.util.Calendar
+import java.util.Date
+import kotlin.math.max
+import kotlin.math.min
+
+class StatisticsActivity :  AppCompatActivity() {
+    lateinit var barChart: BarChart
+    lateinit var noDataTextView: TextView
+    lateinit var eventTypeSelection: Spinner
+    lateinit var dataTypeSelection: Spinner
+    lateinit var timeRangeSelection: Spinner
+
+    // default selection
+    var eventTypeSelectionValue = "BOTTLE"
+    var dataTypeSelectionValue = "AMOUNT"
+    var timeRangeSelectionValue = "DAY"
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContentView(R.layout.activity_statistics)
+
+        val logbookName = intent.getStringExtra("LOOGBOOK_NAME")
+        if (logbookName == null) {
+            finish()
+            return
+        }
+
+        noDataTextView = findViewById(R.id.no_data)
+
+        barChart = findViewById(R.id.bar_chart)
+        barChart.setBackgroundColor(Color.WHITE)
+        barChart.description.text = "$logbookName"
+        barChart.setDrawValueAboveBar(false)
+
+        barChart.axisLeft.setAxisMinimum(0F)
+        barChart.axisLeft.setDrawGridLines(false)
+        barChart.axisLeft.setDrawLabels(false)
+
+        barChart.axisRight.setDrawGridLines(false)
+        barChart.axisRight.setDrawLabels(false)
+
+        barChart.xAxis.setDrawGridLines(true)
+        barChart.xAxis.setDrawLabels(true)
+        barChart.xAxis.setDrawAxisLine(false)
+
+        eventTypeSelection = findViewById(R.id.type_selection)
+        dataTypeSelection = findViewById(R.id.data_selection)
+        timeRangeSelection = findViewById(R.id.time_selection)
+
+        setupSpinner(eventTypeSelectionValue,
+            R.id.type_selection,
+            R.array.StatisticsTypeLabels,
+            R.array.StatisticsTypeValues,
+            object : SpinnerItemSelected {
+                override fun call(newValue: String?) {
+                    if (newValue != null) {
+                        eventTypeSelectionValue = newValue
+                        //Log.d("event", "new value: $newValue")
+                        updateGraph()
+                    }
+                }
+            }
+        )
+
+        setupSpinner(dataTypeSelectionValue,
+            R.id.data_selection,
+            R.array.StatisticsDataLabels,
+            R.array.StatisticsDataValues,
+            object : SpinnerItemSelected {
+                override fun call(newValue: String?) {
+                    if (newValue != null) {
+                        dataTypeSelectionValue = newValue
+                        //Log.d("event", "new value: $newValue")
+                        updateGraph()
+                    }
+                }
+            }
+        )
+
+        setupSpinner(timeRangeSelectionValue,
+            R.id.time_selection,
+            R.array.StatisticsTimeLabels,
+            R.array.StatisticsTimeValues,
+            object : SpinnerItemSelected {
+                override fun call(newValue: String?) {
+                    if (newValue != null) {
+                        timeRangeSelectionValue = newValue
+                        //Log.d("event", "new value: $newValue")
+                        updateGraph()
+                    }
+                }
+            }
+        )
+
+       updateGraph()
+    }
+
+    fun updateGraph() {
+        val eventType = when (eventTypeSelectionValue) {
+            "BOTTLE" -> LunaEvent.TYPE_BABY_BOTTLE
+            "SLEEP" -> LunaEvent.TYPE_SLEEP
+            else -> {
+                Log.e(TAG, "unhandled eventTypeSelectionValue: $eventTypeSelectionValue")
+                return
+            }
+        }
+        val allEvents = MainActivity.allEvents.filter { it.type == eventType }.sortedBy { it.time }
+
+        val values = ArrayList<BarEntry>()
+        val labels = ArrayList<String>()
+
+        val unixToSpan  = when (timeRangeSelectionValue) {
+            "DAY" -> { unix: Long -> unixToDays(unix) }
+            "WEEK" -> { unix: Long -> unixToWeeks(unix) }
+            "MONTH" -> { unix: Long -> unixToMonths(unix) }
+            else -> {
+                Log.e(TAG, "Invalid timeRangeSelectionValue: $timeRangeSelectionValue")
+                return
+            }
+        }
+
+        val spanToUnix = when (timeRangeSelectionValue) {
+            "DAY" -> { span: Int -> daysToUnix(span) }
+            "WEEK" -> { span: Int -> weeksToUnix(span) }
+            "MONTH" -> { span: Int ->  monthsToUnix(span) }
+            else -> {
+                Log.e(TAG, "Invalid timeRangeSelectionValue: $timeRangeSelectionValue")
+                return
+            }
+        }
+
+        fun spanToLabel(span: Int): String {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(1000 * spanToUnix(span))
+            val year = dateTime.get(Calendar.YEAR)
+            val month = dateTime.get(Calendar.MONTH) + 1 // month starts at 0
+            val week = dateTime.get(Calendar.WEEK_OF_YEAR)
+            val day = dateTime.get(Calendar.DAY_OF_MONTH)
+            return when (timeRangeSelectionValue) {
+                "DAY" -> "$day/$month/$year"
+                "WEEK" -> "$week/$year"
+                "MONTH" -> "$month/$year"
+                else -> {
+                    Log.e(TAG, "Invalid timeRangeSelectionValue: $timeRangeSelectionValue")
+                    "?"
+                }
+            }
+        }
+
+        if (allEvents.isNotEmpty()) {
+            barChart.visibility = View.VISIBLE
+            noDataTextView.visibility = View.GONE
+
+            // unix time span of all events
+            val startUnix = allEvents.minOf { it.getStartTime() }
+            val endUnix = allEvents.maxOf { it.getEndTime() }
+
+            // convert to days, weeks or months
+            val startSpan = unixToSpan(startUnix)
+            val endSpan = unixToSpan(endUnix)
+
+            //Log.d(TAG, "startUnix: $startUnix (${Date(1000 * startUnix)}), startSpan: $startSpan (${Date(1000 * spanToUnix(startSpan))}), endUnix: $endUnix (${Date(1000 * endUnix)}), endSpan: $endSpan (${Date(1000 * spanToUnix(endSpan))})")
+            for (span in startSpan..endSpan) {
+                values.add(BarEntry(values.size.toFloat(), 0F))
+                labels.add(spanToLabel(span))
+            }
+
+            for (event in allEvents) {
+                if (dataTypeSelectionValue == "AMOUNT") {
+                    if (eventTypeSelectionValue == "SLEEP") {
+                        // a sleep event can span to another day
+                        // distribute sleep time over the days
+                        val startUnix = event.getStartTime()
+                        val endUnix = event.getEndTime()
+                        val begIndex = unixToSpan(startUnix)
+                        val endIndex = unixToSpan(endUnix)
+                        var mid = startUnix
+
+                        //Log.d(TAG, "startUnix: ${Date(startUnix * 1000)}, endUnix: ${Date(endUnix * 1000)}, begIndex: $begIndex, endIndex: $endIndex (index diff: ${endIndex - begIndex})")
+                        for (i in begIndex..endIndex) {
+                            val spanBegin = spanToUnix(i)
+                            val spanEnd =  spanToUnix(i + 1)
+                            //Log.d(TAG, "mid: ${Date(mid * 1000)}, spanBegin: ${Date(spanBegin * 1000)}, spanEnd: ${Date(spanEnd * 1000)}, endUnix: ${Date(endUnix * 1000)}")
+                            val beg = max(mid, spanBegin)
+                            val end = min(endUnix, spanEnd)
+                            val index = i - startSpan
+                            val duration = end - beg
+                            //Log.d(TAG, "[$index] beg: ${Date(beg * 1000)}, end: ${Date(end * 1000)}, ${formatTimeDuration(this, duration)}")
+
+                            values[index].y += duration
+                            mid = end
+                        }
+                    } else {
+                        val index = unixToSpan(event.time) - startSpan
+                        //Log.d(TAG, "[${index}] ${event.quantity}")
+                        values[index].y += event.quantity
+                    }
+                } else {
+                    val index = unixToSpan(event.time) - startSpan
+                    values[index].y += 1
+                }
+            }
+        } else {
+            barChart.visibility = View.GONE
+            noDataTextView.visibility = View.VISIBLE
+        }
+
+        barChart.xAxis.setLabelCount(min(values.size, 24))
+
+        val set1 = BarDataSet(values, "")
+
+        set1.setDrawValues(true)
+        set1.setDrawIcons(false)
+
+        val dataSets = ArrayList<IBarDataSet?>()
+        dataSets.add(set1)
+
+        val data = BarData(dataSets)
+
+        data.setValueFormatter(object : ValueFormatter() {
+            override fun getFormattedValue(value: Float): String {
+                //Log.d(TAG, "getFormattedValue ${dataTypeSelectionValue} ${eventTypeSelectionValue}")
+                return when (dataTypeSelectionValue) {
+                    "EVENT" -> value.toInt().toString()
+                    "AMOUNT" -> when (eventTypeSelectionValue) {
+                        "BOTTLE" -> NumericUtils(applicationContext).formatEventQuantity(LunaEvent.TYPE_BABY_BOTTLE, value.toInt())
+                        "SLEEP" -> NumericUtils(applicationContext).formatEventQuantity(LunaEvent.TYPE_SLEEP, value.toInt())
+                        else -> {
+                            Log.e(TAG, "unhandled eventTypeSelectionValue: $eventTypeSelectionValue")
+                            value.toInt().toString()
+                        }
+                    } else -> {
+                        Log.e(TAG, "unhandled dataTypeSelectionValue: $dataTypeSelectionValue")
+                        value.toInt().toString()
+                    }
+                }
+            }
+        })
+
+        barChart.xAxis.valueFormatter = object: ValueFormatter() {
+            override fun getFormattedValue(value: Float): String {
+                return labels.getOrElse(value.toInt(), {"?"})
+            }
+        }
+
+        data.setValueTextSize(12f)
+        barChart.setData(data)
+        barChart.invalidate()
+    }
+
+    private interface SpinnerItemSelected {
+        fun call(newValue: String?)
+    }
+
+    private fun setupSpinner(
+        currentValue: String,
+        spinnerId: Int,
+        arrayId: Int,
+        arrayValuesId: Int,
+        callback: SpinnerItemSelected
+    ) {
+        val arrayValues = resources.getStringArray(arrayValuesId)
+        val spinner = findViewById<Spinner>(spinnerId)
+        val spinnerAdapter =
+            ArrayAdapter.createFromResource(this, arrayId, R.layout.statistics_spinner_item) //android.R.layout.simple_spinner_item) //android.R.layout.simple_list_item_single_choice) //R.layout.spinner_item_settings)
+
+        spinner.adapter = spinnerAdapter
+        spinner.setSelection(arrayValues.indexOf(currentValue))
+        spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
+            var check = 0
+            override fun onItemSelected(parent: AdapterView<*>?, view: View?, pos: Int, id: Long) {
+                if (pos >= arrayValues.size) {
+                    Toast.makeText(
+                        this@StatisticsActivity,
+                        "pos out of bounds: $arrayValues", Toast.LENGTH_SHORT
+                    ).show()
+                    return
+                }
+                if (check++ > 0) {
+                    callback.call(arrayValues[pos])
+                }
+            }
+
+            override fun onNothingSelected(parent: AdapterView<*>?) {
+                // ignore
+            }
+        }
+    }
+
+    companion object {
+        const val TAG = "StatisticsActivity"
+
+        fun unixToMonths(seconds: Long): Int {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(seconds * 1000)
+            val years = dateTime.get(Calendar.YEAR)
+            val months = dateTime.get(Calendar.MONTH)
+            return 12 * years + months
+        }
+
+        fun monthsToUnix(months: Int): Long {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(0)
+            dateTime.set(Calendar.YEAR, months / 12)
+            dateTime.set(Calendar.MONTH, months % 12)
+            //Calendar.MONTH_OF_YEAR?
+            dateTime.set(Calendar.HOUR, 0)
+            dateTime.set(Calendar.MINUTE, 0)
+            dateTime.set(Calendar.SECOND, 0)
+            return dateTime.time.time / 1000
+        }
+
+        fun unixToWeeks(seconds: Long): Int {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(seconds * 1000)
+            val years = dateTime.get(Calendar.YEAR)
+            val weeks = dateTime.get(Calendar.WEEK_OF_YEAR)
+            return 52 * years + weeks
+        }
+
+        fun weeksToUnix(weeks: Int): Long {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(0)
+            dateTime.set(Calendar.YEAR, weeks / 52)
+            dateTime.set(Calendar.WEEK_OF_YEAR, weeks % 52)
+            dateTime.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY)
+            dateTime.set(Calendar.HOUR, 0)
+            dateTime.set(Calendar.MINUTE, 0)
+            dateTime.set(Calendar.SECOND, 0)
+            return dateTime.time.time / 1000
+        }
+
+        fun unixToDays(seconds: Long): Int {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(seconds * 1000)
+            val years = dateTime.get(Calendar.YEAR)
+            val days = dateTime.get(Calendar.DAY_OF_YEAR)
+            return 365 * years + days
+        }
+
+        // convert from days to Date
+        fun daysToUnix(days: Int): Long {
+            val dateTime = Calendar.getInstance()
+            dateTime.time = Date(0)
+            dateTime.set(Calendar.YEAR, days / 365)
+            dateTime.set(Calendar.DAY_OF_YEAR, days % 365)
+            dateTime.set(Calendar.HOUR, 0)
+            dateTime.set(Calendar.MINUTE, 0)
+            dateTime.set(Calendar.SECOND, 0)
+            return dateTime.time.time / 1000
+        }
+    }
+}

app/src/main/java/it/danieleverducci/lunatracker/adapters/LunaEventRecyclerAdapter.kt

@@ -59,7 +59,7 @@ class LunaEventRecyclerAdapter: RecyclerView.Adapter<LunaEventRecyclerAdapter.Lu
             LunaEvent.TYPE_CUSTOM -> item.notes
             else -> item.getTypeDescription(context)
         }
-        holder.time.text = DateUtils.formatTimeAgo(context, item.time)
+        holder.time.text = DateUtils.formatTimeAgo(context, item.getEndTime())
         var quantityText = numericUtils.formatEventQuantity(item)
 
         // if the event is weight, show difference with the last one

app/src/main/java/it/danieleverducci/lunatracker/entities/LunaEvent.kt

@@ -94,6 +94,18 @@ class LunaEvent: Comparable<LunaEvent> {
         this.quantity = quantity
     }
 
+    fun getStartTime(): Long {
+        return time
+    }
+
+    fun getEndTime(): Long {
+        return if (type == TYPE_SLEEP) {
+            time + quantity
+        } else {
+            time
+        }
+    }
+
     fun getTypeEmoji(context: Context): String {
         return context.getString(
             when (type) {

app/src/main/java/utils/NumericUtils.kt

@@ -63,28 +63,31 @@ class NumericUtils (val context: Context) {
     }
 
     fun formatEventQuantity(event: LunaEvent): String {
+        return formatEventQuantity(event.type, event.quantity)
+    }
+
+    fun formatEventQuantity(type: String, quantity: Int): String {
         val formatted = StringBuilder()
-        if (event.quantity > 0) {
+        if (quantity > 0) {
-            formatted.append(when (event.type) {
+            formatted.append(when (type) {
                 LunaEvent.TYPE_TEMPERATURE ->
-                    (event.quantity / 10.0f).toString()
+                    (quantity / 10.0f).toString()
                 LunaEvent.TYPE_DIAPERCHANGE_POO,
                 LunaEvent.TYPE_DIAPERCHANGE_PEE,
                 LunaEvent.TYPE_PUKE -> {
                     val array = context.resources.getStringArray(R.array.AmountLabels)
-                    return array.getOrElse(event.quantity) {
+                    return array.getOrElse(quantity) {
-                        Log.e("NumericUtils", "Invalid index ${event.quantity}")
+                        Log.e("NumericUtils", "Invalid index $quantity")
                         return ""
                     }
                 }
-                LunaEvent.TYPE_SLEEP -> formatTimeDuration(context, event.quantity.toLong())
+                LunaEvent.TYPE_SLEEP -> formatTimeDuration(context, quantity.toLong())
-                else ->
+                else -> quantity
-                    event.quantity
             })
 
             formatted.append(" ")
             formatted.append(
-                when (event.type) {
+                when (type) {
                     LunaEvent.TYPE_BABY_BOTTLE -> measurement_unit_liquid_base
                     LunaEvent.TYPE_WEIGHT -> measurement_unit_weight_base
                     LunaEvent.TYPE_MEDICINE -> measurement_unit_weight_tiny
@@ -93,7 +96,7 @@ class NumericUtils (val context: Context) {
                 }
             )
         } else {
-            formatted.append(when (event.type) {
+            formatted.append(when (type) {
                 LunaEvent.TYPE_SLEEP -> "💤" // baby is sleeping
                 else -> ""
             })

app/src/main/res/layout/activity_statistics.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="10dp">
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="1">
+
+        <com.github.mikephil.charting.charts.HorizontalBarChart
+            android:id="@+id/bar_chart"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+
+        <TextView
+            android:id="@+id/no_data"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:visibility="gone"
+            android:gravity="center"
+            android:text="No Data"/>
+
+    </FrameLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_weight="0"
+        android:layout_marginTop="10dp"
+        android:orientation="horizontal">
+
+        <Spinner
+            android:id="@+id/type_selection"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1" />
+
+        <Spinner
+            android:id="@+id/data_selection"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"/>
+
+        <Spinner
+            android:id="@+id/time_selection"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"/>
+
+    </LinearLayout>
+
+</LinearLayout>

app/src/main/res/layout/dialog_edit_duration.xml

@@ -22,13 +22,6 @@
         android:layout_marginHorizontal="10dp"
         android:orientation="horizontal">
 
-        <Button
-            android:id="@+id/dialog_date_duration_minus15"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="-15"/>
-
         <Button
             android:id="@+id/dialog_date_duration_minus5"
             android:layout_width="wrap_content"
@@ -50,13 +43,6 @@
             android:layout_weight="1"
             android:text="+5"/>
 
-        <Button
-            android:id="@+id/dialog_date_duration_plus15"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="+15"/>
-
     </LinearLayout>
 
     <TextView

app/src/main/res/layout/dialog_event_details.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent"

app/src/main/res/layout/more_events_popup.xml

@@ -10,10 +10,21 @@
         android:layout_height="wrap_content"
         android:orientation="vertical">
 
+            <TextView
+                android:id="@+id/button_statistics"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_marginTop="10dp"
+                android:padding="10dp"
+                android:background="@drawable/dropdown_list_item_background"
+                style="@style/OverflowMenuText"
+                android:text="📊 Statistics"/>
+
             <TextView
                 android:id="@+id/button_medicine"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
+                android:layout_marginTop="10dp"
                 android:padding="10dp"
                 android:background="@drawable/dropdown_list_item_background"
                 style="@style/OverflowMenuText"

app/src/main/res/layout/statistics_spinner_item.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView  
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent" 
+    android:layout_height="wrap_content"
+    android:textSize="20sp"
+    android:gravity="center"
+    android:padding="5dip" />

app/src/main/res/values/arrays.xml

@@ -6,4 +6,37 @@
         <item>@string/amount_normal</item>
         <item>@string/amount_plenty</item>
     </string-array>
+
+    <string-array name="StatisticsTypeLabels">
+        <item>Bottle</item>
+        <item>Sleep</item>
+    </string-array>
+
+    <string-array name="StatisticsTypeValues">
+        <item>BOTTLE</item>
+        <item>SLEEP</item>
+    </string-array>
+
+    <string-array name="StatisticsDataLabels">
+        <item>Event</item>
+        <item>Amount</item>
+    </string-array>
+
+    <string-array name="StatisticsDataValues">
+        <item>EVENT</item>
+        <item>AMOUNT</item>
+    </string-array>
+
+    <string-array name="StatisticsTimeLabels">
+        <item>Day</item>
+        <item>Week</item>
+        <item>Month</item>
+    </string-array>
+
+    <string-array name="StatisticsTimeValues">
+        <item>DAY</item>
+        <item>WEEK</item>
+        <item>MONTH</item>
+    </string-array>
+
 </resources>

app/src/main/res/values/strings.xml

@@ -77,6 +77,8 @@
     <string name="no_connection_go_to_settings">Settings</string>
     <string name="no_connection_retry">Retry</string>
 
+    <string name="statistics_title">Statistics</string>
+
     <string name="settings_title">Settings</string>
     <string name="settings_signature">Signature</string>
     <string name="settings_signature_desc">Attach a signature to each event you create and for others to see. Useful if multiple people add events.</string>
@@ -132,7 +134,8 @@
     <string name="row_luna_event_time">Time</string>
 
     <string name="dialog_event_detail_title">Event detail</string>
-    <string name="dialog_event_detail_close_button">OK</string>
+    <string name="dialog_event_detail_close_button">Close</string>
+    <string name="dialog_event_detail_save_button">Save</string>
     <string name="dialog_event_detail_delete_button">Delete</string>
     <string name="dialog_event_detail_quantity">Quantity</string>
     <string name="dialog_event_detail_notes">Notes</string>

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-agp = "8.13.0"
+agp = "8.12.0"
 kotlin = "2.0.0"
 coreKtx = "1.10.1"
 junit = "4.13.2"
@@ -9,6 +9,8 @@ lifecycleRuntimeKtx = "2.6.1"
 activityCompose = "1.8.0"
 composeBom = "2024.04.01"
 appcompat = "1.7.0"
+mpandroidchart = "v4.2.2"
+mpandroidchartVersion = "v3.1.0"
 recyclerview = "1.3.2"
 material = "1.12.0"
 
@@ -30,6 +32,8 @@ androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit
 androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
 androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
 material = { group = "com.google.android.material", name = "material", version.ref = "material" }
+mpandroidchart = { module = "com.github.PhilJay:MPAndroidChart", version.ref = "mpandroidchart" }
+mpandroidchart-vv310 = { module = "com.github.PhilJay:MPAndroidChart", version.ref = "mpandroidchartVersion" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }

settings.gradle.kts

@@ -16,7 +16,7 @@ dependencyResolutionManagement {
     repositories {
         google()
         mavenCentral()
-        maven(url = "https://jitpack.io")
+        maven(url = uri("https://jitpack.io"))
     }
 }