Custom view

app/build.gradle

@@ -1,6 +1,7 @@
 plugins {
     id 'com.android.application'
     id 'kotlin-android'
+    id 'kotlin-parcelize'
 }
 
 android {
@@ -42,4 +43,7 @@ dependencies {
     testImplementation 'junit:junit:4.+'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+
+    implementation 'com.google.code.gson:gson:2.8.5'
+    implementation 'com.jakewharton.threetenabp:threetenabp:1.3.0'
 }

app/src/main/AndroidManifest.xml

@@ -10,7 +10,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.CustomView">
-        <activity android:name=".MainActivity">
+        <activity android:name=".views.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/otus/homework/customview/models/Models.kt

@@ -0,0 +1,74 @@
+package otus.homework.customview.models
+
+import android.graphics.Color
+import android.os.Parcelable
+import androidx.annotation.ColorInt
+import kotlinx.parcelize.IgnoredOnParcel
+import kotlinx.parcelize.Parcelize
+import otus.homework.customview.utils.ColorGenerator
+
+data class Expenditure(
+    val id: Int,
+    val name: String,
+    val amount: Float,
+    val category: String,
+    val time: Long
+)
+
+@Parcelize
+data class PieChartSegment(
+    val id: Int,
+    val name: String,
+    val amount: Float,
+    val category: String,
+    val startAngle: Float,
+    val endAngle: Float,
+    val percentageOfMaximum: Float,
+    @ColorInt val color: Int
+): Parcelable {
+
+    @IgnoredOnParcel
+    val segmentAngle = endAngle - startAngle
+}
+
+@Parcelize
+data class LinearChartPoint(
+    val id: Int,
+    val name: String,
+    val amount: Float,
+    val category: String,
+    val time: Long,
+    val dayInMonth: Int
+) : Parcelable {
+
+    fun mapExpenditureCategory() = when (category) {
+        "Продукты" -> ExpenditureCategory.PRODUCTS
+        "Здоровье" -> ExpenditureCategory.HEALTH
+        "Кафе и рестораны" -> ExpenditureCategory.EATING_OUT
+        "Алкоголь" -> ExpenditureCategory.ALCOHOL
+        "Доставка еды" -> ExpenditureCategory.DELIVERY
+        "Транспорт" -> ExpenditureCategory.TRANSPORT
+        "Спорт" -> ExpenditureCategory.SPORT
+        else -> throw IllegalArgumentException("Error while parsing unknown category: $category")
+    }
+}
+
+@Parcelize
+enum class ExpenditureCategory : Parcelable {
+    PRODUCTS, HEALTH, EATING_OUT, ALCOHOL, DELIVERY, TRANSPORT, SPORT;
+
+    @ColorInt
+    fun getChartColor(): Int {
+        return when (this) {
+            PRODUCTS -> Color.rgb(38, 50, 124)
+            HEALTH -> Color.rgb(100, 188, 223)
+            EATING_OUT -> Color.rgb(230, 197, 87)
+            TRANSPORT -> Color.rgb(202, 58, 46)
+            else -> ColorGenerator.generateColor()
+        }
+    }
+}
+
+enum class Chart {
+    PIE, LINEAR
+}

app/src/main/java/otus/homework/customview/utils/ColorGenerator.kt

@@ -0,0 +1,14 @@
+package otus.homework.customview.utils
+
+import android.graphics.Color
+import androidx.annotation.ColorInt
+import java.util.*
+
+object ColorGenerator {
+
+    @ColorInt
+    fun generateColor(): Int {
+        val rnd = Random()
+        return Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256))
+    }
+}

app/src/main/java/otus/homework/customview/utils/Extention.kt

@@ -0,0 +1,11 @@
+package otus.homework.customview.utils
+
+import android.content.res.Resources
+import android.util.TypedValue
+
+val Number.toPx
+    get() = TypedValue.applyDimension(
+        TypedValue.COMPLEX_UNIT_DIP,
+        this.toFloat(),
+        Resources.getSystem().displayMetrics
+    )