activity_setting: fine tune layout style

For multiple users it helps to
keep track about who did what.

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

@@ -41,7 +41,6 @@ import okio.IOException
 import org.json.JSONException
 import utils.DateUtils
 import utils.NumericUtils
-import java.text.DateFormat
 import java.util.Calendar
 import java.util.Date
 
@@ -58,6 +57,7 @@ class MainActivity : AppCompatActivity() {
     lateinit var buttonsContainer: ViewGroup
     lateinit var recyclerView: RecyclerView
     lateinit var handler: Handler
+    var signature = ""
     var savingEvent = false
     val updateListRunnable: Runnable = Runnable {
         if (logbook != null && !pauseLogbookUpdate)
@@ -169,6 +169,8 @@ class MainActivity : AppCompatActivity() {
             logbookRepo = FileLogbookRepository()
         }
 
+        signature = settingsRepository.loadSignature()
+
         val noBreastfeeding = settingsRepository.loadNoBreastfeeding()
         findViewById<View>(R.id.layout_nipples).visibility = when (noBreastfeeding) {
             true -> View.GONE
@@ -340,7 +342,6 @@ class MainActivity : AppCompatActivity() {
     fun showEventDetailDialog(event: LunaEvent, items: ArrayList<LunaEvent>) {
         // Do not update list while the detail is shown, to avoid changing the object below while it is changed by the user
         pauseLogbookUpdate = true
-        val dateFormat = DateFormat.getDateTimeInstance()
         val d = AlertDialog.Builder(this)
         d.setTitle(R.string.dialog_event_detail_title)
         val dialogView = layoutInflater.inflate(R.layout.dialog_event_detail, null)
@@ -352,8 +353,9 @@ class MainActivity : AppCompatActivity() {
 
         val currentDateTime = Calendar.getInstance()
         currentDateTime.time = Date(event.time * 1000)
+
         val dateTextView = dialogView.findViewById<TextView>(R.id.dialog_event_detail_type_date)
-        dateTextView.text = String.format(getString(R.string.dialog_event_detail_datetime_icon), dateFormat.format(currentDateTime.time))
+        dateTextView.text = String.format(getString(R.string.dialog_event_detail_datetime_icon), DateUtils.formatDateTime(event.time))
         dateTextView.setOnClickListener {
             // Show datetime picker
             val startYear = currentDateTime.get(Calendar.YEAR)
@@ -366,11 +368,9 @@ class MainActivity : AppCompatActivity() {
                 TimePickerDialog(this, { _, hour, minute ->
                     val pickedDateTime = Calendar.getInstance()
                     pickedDateTime.set(year, month, day, hour, minute)
-                    currentDateTime.time = pickedDateTime.time
-                    dateTextView.text = String.format(getString(R.string.dialog_event_detail_datetime_icon), dateFormat.format(currentDateTime.time))
-
                     // Save event and move it to the right position in the logbook
-                    event.time = currentDateTime.time.time / 1000 // Seconds since epoch
+                    event.time = pickedDateTime.time.time / 1000 // Seconds since epoch
+                    dateTextView.text = String.format(getString(R.string.dialog_event_detail_datetime_icon), DateUtils.formatDateTime(event.time))
                     logbook?.sort()
                     recyclerView.adapter?.notifyDataSetChanged()
                     saveLogbook()
@@ -389,6 +389,13 @@ class MainActivity : AppCompatActivity() {
             pauseLogbookUpdate = false
         })
 
+        // show optional signature
+        if (event.signature.isNotEmpty()) {
+            val signatureTextEdit = dialogView.findViewById<TextView>(R.id.dialog_event_detail_type_signature)
+            signatureTextEdit.text =  String.format(getString(R.string.dialog_event_detail_signature), event.signature)
+            signatureTextEdit.visibility = View.VISIBLE
+        }
+
         // create next/previous links to events of the same type
 
         val previousTextView = dialogView.findViewById<TextView>(R.id.dialog_event_previous)
@@ -638,6 +645,8 @@ class MainActivity : AppCompatActivity() {
     fun logEvent(event: LunaEvent) {
         savingEvent(true)
 
+        event.signature = signature
+
         setLoading(true)
         logbook?.logs?.add(0, event)
         recyclerView.adapter?.notifyItemInserted(0)

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

@@ -2,6 +2,7 @@ package it.danieleverducci.lunatracker
 
 import android.os.Bundle
 import android.view.View
+import android.widget.EditText
 import android.widget.RadioButton
 import android.widget.TextView
 import android.widget.Toast
@@ -24,6 +25,7 @@ open class SettingsActivity : AppCompatActivity() {
     protected lateinit var textViewWebDAVPass: TextView
     protected lateinit var progressIndicator: LinearProgressIndicator
     protected lateinit var switchNoBreastfeeding: SwitchMaterial
+    protected lateinit var textViewSignature: EditText
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -36,6 +38,7 @@ open class SettingsActivity : AppCompatActivity() {
         textViewWebDAVPass = findViewById(R.id.settings_data_webdav_pass)
         progressIndicator = findViewById(R.id.progress_indicator)
         switchNoBreastfeeding = findViewById(R.id.switch_no_breastfeeding)
+        textViewSignature = findViewById(R.id.settings_signature)
 
         findViewById<View>(R.id.settings_save).setOnClickListener({
             validateAndSave()
@@ -52,12 +55,14 @@ open class SettingsActivity : AppCompatActivity() {
         val dataRepo = settingsRepository.loadDataRepository()
         val webDavCredentials = settingsRepository.loadWebdavCredentials()
         val noBreastfeeding = settingsRepository.loadNoBreastfeeding()
+        val signature = settingsRepository.loadSignature()
 
         when (dataRepo) {
             LocalSettingsRepository.DATA_REPO.LOCAL_FILE -> radioDataLocal.isChecked = true
             LocalSettingsRepository.DATA_REPO.WEBDAV -> radioDataWebDAV.isChecked = true
         }
 
+        textViewSignature.setText(signature)
         switchNoBreastfeeding.isChecked = noBreastfeeding
 
         if (webDavCredentials != null) {
@@ -156,6 +161,7 @@ open class SettingsActivity : AppCompatActivity() {
             else LocalSettingsRepository.DATA_REPO.LOCAL_FILE
         )
         settingsRepository.saveNoBreastfeeding(switchNoBreastfeeding.isChecked)
+        settingsRepository.saveSignature(textViewSignature.text.toString())
         settingsRepository.saveWebdavCredentials(
             textViewWebDAVUrl.text.toString(),
             textViewWebDAVUser.text.toString(),

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

@@ -55,6 +55,12 @@ class LunaEvent: Comparable<LunaEvent> {
         set(value) {
             jo.put("notes", value)
         }
+    var signature: String
+        get(): String = jo.optString("signature")
+        set(value) {
+            if (value.isNotEmpty())
+                jo.put("signature", value)
+        }
 
     constructor(jo: JSONObject) {
         this.jo = jo

app/src/main/java/it/danieleverducci/lunatracker/repository/LocalSettingsRepository.kt

@@ -14,6 +14,7 @@ class LocalSettingsRepository(val context: Context) {
         const val SHARED_PREFS_DAV_USER = "webdav_user"
         const val SHARED_PREFS_DAV_PASS = "webdav_password"
         const val SHARED_PREFS_NO_BREASTFEEDING = "no_breastfeeding"
+        const val SHARED_PREFS_SIGNATURE = "signature"
     }
     enum class DATA_REPO {LOCAL_FILE, WEBDAV}
     val sharedPreferences: SharedPreferences
@@ -30,6 +31,14 @@ class LocalSettingsRepository(val context: Context) {
         return sharedPreferences.getInt(SHARED_PREFS_BB_CONTENT, 1)
     }
 
+    fun saveSignature(content: String) {
+        sharedPreferences.edit { putString(SHARED_PREFS_SIGNATURE, content) }
+    }
+
+    fun loadSignature(): String {
+        return sharedPreferences.getString(SHARED_PREFS_SIGNATURE, "") ?: ""
+    }
+
     fun saveNoBreastfeeding(content: Boolean) {
         sharedPreferences.edit { putBoolean(SHARED_PREFS_NO_BREASTFEEDING, content) }
     }

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

@@ -1,12 +1,17 @@
 package utils
 
 import android.content.Context
+import android.os.Build
 import android.text.format.DateFormat
 import it.danieleverducci.lunatracker.R
 import java.util.Date
 
 class DateUtils {
     companion object {
+        /**
+         * Format time duration in seconds as e.g. "2 hours, 1 min".
+         * Used for the duration to the next/previous event in the event details dialog.
+         */
         fun formatTimeDuration(context: Context, secondsDiff: Long): String {
             var seconds = secondsDiff
 
@@ -65,7 +70,8 @@ class DateUtils {
         }
 
         /**
-         * Formats the provided unix timestamp in a string like "3 hours, 26 minutes ago)
+         * Formats the provided unix timestamp in a string like "3 hours, 26 minutes ago".
+         * Used for the event list.
          */
         fun formatTimeAgo(context: Context, unixTime: Long): String {
             val secondsDiff = (System.currentTimeMillis() / 1000) - unixTime
@@ -100,5 +106,21 @@ class DateUtils {
             }
             return formattedTime.toString()
         }
+
+        /**
+         * Format time as localized string without seconds. E.g. "Sept 18, 2025, 03:36 PM".
+         * Used in the event detail dialog.
+         */
+        fun formatDateTime(unixTime: Long): String {
+            val date = Date(unixTime * 1000)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                val dateFormat = android.icu.text.DateFormat.getDateTimeInstance(android.icu.text.DateFormat.RELATIVE_SHORT, android.icu.text.DateFormat.SHORT)
+                return dateFormat.format(date)
+            } else {
+                // fallback
+                val dateFormat = java.text.DateFormat.getDateTimeInstance()
+                return dateFormat.format(date)
+            }
+        }
     }
 }

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

@@ -119,12 +119,33 @@
                 android:visibility="invisible"/>
         </RadioGroup>
 
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textStyle="bold"
+            android:text="@string/settings_signature" />
+
+        <EditText
+            android:id="@+id/settings_signature"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="20dp"
+            android:layout_marginTop="5dp"
+            android:inputType="textEmailAddress"
+            android:background="@drawable/textview_background"/>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="30dp"
+            android:layout_marginTop="5dp"
+            android:text="@string/settings_signature_desc"/>
+
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="horizontal"
-            android:layout_marginTop="5dp"
-            android:layout_marginEnd="30dp">
+            android:layout_marginTop="20dp">
 
             <TextView
                 android:layout_width="0dp"
@@ -135,8 +156,9 @@
 
             <com.google.android.material.switchmaterial.SwitchMaterial
                 android:id="@+id/switch_no_breastfeeding"
-                android:layout_width="0dp"
+                android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_marginEnd="20dp"
                 android:layout_weight="1" />
 
         </LinearLayout>
@@ -145,6 +167,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginStart="30dp"
+            android:layout_marginTop="5dp"
             android:text="@string/settings_no_breastfeeding_desc"/>
 
         <LinearLayout

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

@@ -61,6 +61,14 @@
 
     </ScrollView>
 
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:id="@+id/dialog_event_detail_type_signature"
+        android:layout_marginBottom="5dp"
+        android:visibility="gone"/>
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"

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

@@ -78,6 +78,8 @@
     <string name="no_connection_retry">Retry</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>
     <string name="settings_storage">Choose where to save data</string>
     <string name="settings_storage_local">On device</string>
     <string name="settings_storage_local_desc">Most privacy-friendly solution: data doesn\'t leave your device</string>
@@ -129,6 +131,7 @@
     <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>
+    <string name="dialog_event_detail_signature">by %s</string>
 
     <string name="dialog_add_logbook_title">Add logbook</string>
     <string name="dialog_add_logbook_logbookname">👶 Logbook name</string>