[FEAT] Add timeline widget for android

android/app/build.gradle.kts

@@ -80,13 +80,17 @@ android {
     kotlinOptions {
         jvmTarget = "17"
     }
+    buildFeatures {
+        viewBinding = true
+    }
 }
 
 flutter {
     source = "../.."
 }
 
 dependencies {
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test:runner:1.6.2")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.6.1")

android/app/src/main/AndroidManifest.xml

@@ -1,49 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
+
+    <!--
+     io.flutter.app.FlutterApplication is an android.app.Application that
          calls FlutterMain.startInitialization(this); in its onCreate method.
          In most cases you can leave this as-is, but you if you want to provide
          additional functionality it is fine to subclass or reimplement
-         FlutterApplication and put your custom class here. -->
-    <uses-permission
-        android:name="android.permission.INTERNET"/>
+         FlutterApplication and put your custom class here.
+    -->
+    <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
-        android:maxSdkVersion="28"/>
-    <uses-permission
-        android:name="android.permission.READ_EXTERNAL_STORAGE"/>
-    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+        android:maxSdkVersion="28" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
     <application
         android:name="${applicationName}"
-        android:label="OTL"
-        android:icon="@mipmap/ic_launcher"
         android:allowBackup="true"
-        android:fullBackupContent="true">
+        android:fullBackupContent="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="OTL">
+        <receiver
+            android:name=".TimetableWidget"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/timetable_widget_info" />
+        </receiver>
+        <receiver
+            android:name=".NextLectureWidget"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/next_lecture_widget_info" />
+        </receiver>
+
         <activity
             android:name=".MainActivity"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:exported="true"
+            android:hardwareAccelerated="true"
             android:launchMode="singleTop"
             android:screenOrientation="portrait"
             android:theme="@style/LaunchTheme"
-            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
-            android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize"
-            android:exported="true">
+            android:windowSoftInputMode="adjustResize">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-         <service
-        android:name="com.kuku.channel_talk_flutter.PushInterceptService"
-        android:exported="true"
-         >
+
+        <service
+            android:name="com.kuku.channel_talk_flutter.PushInterceptService"
+            android:exported="true">
             <intent-filter>
-                <action android:name="com.google.firebase.MESSAGING_EVENT"/>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
             </intent-filter>
         </service>
-        <!-- Don't delete the meta-data below.
-             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <!--
+ Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java
+        -->
         <meta-data
             android:name="flutterEmbedding"
-            android:value="2"/>
+            android:value="2" />
     </application>
+
 </manifest>

android/app/src/main/java/org/sparcs/otlplus/NextLectureWidget.kt

@@ -0,0 +1,48 @@
+package org.sparcs.otlplus
+
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.widget.RemoteViews
+import org.sparcs.otlplus.api.NextLectureData
+
+/**
+ * Implementation of App Widget functionality.
+ */
+
+class NextLectureWidget : AppWidgetProvider() {
+    override fun onUpdate(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetIds: IntArray
+    ) {
+        // There may be multiple widgets active, so update all of them
+        for (appWidgetId in appWidgetIds) {
+            updateNextLectureWidget(context, appWidgetManager, appWidgetId)
+        }
+    }
+
+    override fun onEnabled(context: Context) {
+        // Enter relevant functionality for when the first widget is created
+    }
+
+    override fun onDisabled(context: Context) {
+        // Enter relevant functionality for when the last widget is disabled
+    }
+}
+
+internal fun updateNextLectureWidget(
+    context: Context,
+    appWidgetManager: AppWidgetManager,
+    appWidgetId: Int
+) {
+    // Construct the RemoteViews object
+    RemoteViews(context.packageName, R.layout.next_lecture_widget).let {
+        it.setTextViewText(R.id.nextLectureDate, NextLectureData.nextLectureDate)
+        it.setTextViewText(R.id.nextLectureName, NextLectureData.nextLectureName)
+        it.setTextViewText(R.id.nextLecturePlace, NextLectureData.nextLecturePlace)
+        it.setTextViewText(R.id.nextLectureProfessor, NextLectureData.nextLectureProfessor)
+        // Instruct the widget manager to update the widget
+        appWidgetManager.updateAppWidget(appWidgetId, it)
+    }
+}

android/app/src/main/java/org/sparcs/otlplus/TimetableWidget.kt

@@ -0,0 +1,112 @@
+package org.sparcs.otlplus
+
+import android.annotation.SuppressLint
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.util.TypedValue
+import android.widget.RemoteViews
+import org.sparcs.otlplus.api.Lecture
+import org.sparcs.otlplus.api.LocalTime
+import org.sparcs.otlplus.api.TimetableData
+import org.sparcs.otlplus.api.WeekDays
+import org.sparcs.otlplus.constants.BlockColor
+
+val timeTableColumns = listOf(
+    R.id.time_table_column_1,
+    R.id.time_table_column_2,
+    R.id.time_table_column_3,
+    R.id.time_table_column_4,
+    R.id.time_table_column_5,
+)
+
+data class TimeTableElement(
+    val length: Float,
+    val lecture: Lecture?
+)
+
+/**
+ * Implementation of App Widget functionality.
+ */
+class TimetableWidget : AppWidgetProvider() {
+    override fun onUpdate(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetIds: IntArray
+    ) {
+        // There may be multiple widgets active, so update all of them
+        for (appWidgetId in appWidgetIds) {
+            updateTimetableWidget(context, appWidgetManager, appWidgetId)
+        }
+    }
+
+    override fun onEnabled(context: Context) {
+        // Enter relevant functionality for when the first widget is created
+    }
+
+    override fun onDisabled(context: Context) {
+        // Enter relevant functionality for when the last widget is disabled
+    }
+}
+
+@SuppressLint("NewApi")
+internal fun updateTimetableWidget(
+    context: Context,
+    appWidgetManager: AppWidgetManager,
+    appWidgetId: Int
+) {
+    val views = RemoteViews(context.packageName, R.layout.timetable_widget)
+
+    for (timetableColumn in timeTableColumns) {
+        views.removeAllViews(timetableColumn)
+    }
+
+    val weekTimetable = createTimeTable(TimetableData.lectures)
+
+    for ((weekday, dayTimetable) in weekTimetable.withIndex()) {
+        for (timeTableElement in dayTimetable) {
+            val blockView = when(timeTableElement.lecture) {
+                null -> RemoteViews(context.packageName, R.layout.blank_view)
+                else -> RemoteViews(context.packageName, BlockColor.getLayout(timeTableElement.lecture)).apply {
+                    setTextViewText(R.id.timetable_block_lecture_name, timeTableElement.lecture.name)
+                }
+            }
+
+            blockView.setViewLayoutHeight(
+                R.id.timetable_block_root,
+                timeTableElement.length * 36,
+                TypedValue.COMPLEX_UNIT_DIP)
+
+            views.addView(timeTableColumns[weekday], blockView)
+        }
+    }
+
+    // Instruct the widget manager to update the widget
+    appWidgetManager.updateAppWidget(appWidgetId, views)
+}
+
+fun createTimeTable(lectures: List<Lecture>): List<List<TimeTableElement>> {
+    val timetable = List(5) { mutableListOf<TimeTableElement>() }
+
+    for (dayIndex in WeekDays.entries.toTypedArray().indices) {
+        val day = WeekDays.entries[dayIndex]
+
+        val dailyLectures = lectures.flatMap { lecture ->
+            lecture.timeBlocks.filter { it.weekday == day }.map { it to lecture }
+        }.sortedBy { it.first.start.hoursFloat }
+
+        var currentTime = LocalTime(9, 0)
+
+        for ((timeBlock, lecture) in dailyLectures) {
+            if (timeBlock.start.hoursFloat > currentTime.hoursFloat) {
+                val freeTimeLength = timeBlock.start.hoursFloat - currentTime.hoursFloat
+                timetable[dayIndex].add(TimeTableElement(freeTimeLength, null))
+            }
+            val lectureLength = timeBlock.end.hoursFloat - timeBlock.start.hoursFloat
+            timetable[dayIndex].add(TimeTableElement(lectureLength, lecture))
+            currentTime = timeBlock.end
+        }
+    }
+
+    return timetable
+}

android/app/src/main/java/org/sparcs/otlplus/api/Lecture.kt

@@ -0,0 +1,31 @@
+package org.sparcs.otlplus.api
+
+enum class WeekDays {
+    Mon,
+    Tue,
+    Wed,
+    Thu,
+    Fri,
+}
+
+data class LocalTime(
+    val hours: Int,
+    val minutes: Int,
+) {
+    val hoursFloat: Float
+        get() = hours + minutes / 60f
+}
+
+data class TimeBlock(
+    val weekday: WeekDays,
+    val start: LocalTime,
+    val end: LocalTime
+)
+
+data class Lecture(
+    val name: String,
+    val timeBlocks: List<TimeBlock>,
+    val place: String,
+    val professor: String,
+    val course: Int,
+)

android/app/src/main/java/org/sparcs/otlplus/api/NextLectureData.kt

@@ -0,0 +1,15 @@
+package org.sparcs.otlplus.api
+
+object NextLectureData { // TODO: Get data using api
+    val nextLectureDate
+        get() = "다음주 월요일"
+
+    val nextLectureName
+        get() = "일반물리학"
+
+    val nextLecturePlace
+        get() = "(E11)창의학습관 311"
+
+    val nextLectureProfessor
+        get() = "김교수"
+}

android/app/src/main/java/org/sparcs/otlplus/api/TimetableData.kt

@@ -0,0 +1,43 @@
+package org.sparcs.otlplus.api
+
+object TimetableData {
+    val lectures: List<Lecture>
+        get() = listOf(
+            Lecture(
+                name = "프로그래밍 기초",
+                place = "(E11)창의학습관 308",
+                professor = "김교수",
+                timeBlocks = listOf(
+                    TimeBlock(
+                        weekday = WeekDays.Mon,
+                        start = LocalTime(9, 0),
+                        end = LocalTime(12, 0),
+                    ),
+                    TimeBlock(
+                        weekday = WeekDays.Wed,
+                        start = LocalTime(10, 30),
+                        end = LocalTime(12, 0),
+                    ),
+                ),
+                course = 317
+            ),
+            Lecture(
+                name = "지속가능 사회 인프라 시스템과 환경의 이해",
+                place = "(E11) 창의학습관 208",
+                professor = "김교수",
+                timeBlocks = listOf(
+                    TimeBlock(
+                        weekday = WeekDays.Mon,
+                        start = LocalTime(16, 0),
+                        end = LocalTime(17, 30),
+                    ),
+                    TimeBlock(
+                        weekday = WeekDays.Wed,
+                        start = LocalTime(16, 0),
+                        end = LocalTime(17, 30),
+                    ),
+                ),
+                course = 100
+            )
+        )
+}