PR

app/build.gradle

@@ -4,13 +4,13 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 33
     buildToolsVersion "30.0.3"
 
     defaultConfig {
         applicationId "otus.homework.customview"
         minSdkVersion 23
-        targetSdkVersion 30
+        targetSdkVersion 33
         versionCode 1
         versionName "1.0"
 
@@ -42,4 +42,5 @@ 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:2.8.9'
 }

app/src/main/AndroidManifest.xml

@@ -10,7 +10,8 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.CustomView">
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/assets/payload.json

@@ -0,0 +1,114 @@
+[
+  {
+    "id": 1,
+    "name": "Азбука Вкуса",
+    "amount": 1580,
+    "category": "Продукты",
+    "time": 1623318531
+  },
+  {
+    "id": 2,
+    "name": "Ригла",
+    "amount": 4990,
+    "category": "Здоровье",
+    "time": 1623322251
+  },
+  {
+    "id": 3,
+    "name": "Пятерочка",
+    "amount": 129,
+    "category": "Продукты",
+    "time": 1623322371
+  },
+  {
+    "id": 4,
+    "name": "Truffo",
+    "amount": 4541,
+    "category": "Кафе и рестораны",
+    "time": 1623326031
+  },
+  {
+    "id": 5,
+    "name": "Simple Wine",
+    "amount": 1600,
+    "category": "Алкоголь",
+    "time": 1623329631
+  },
+  {
+    "id": 6,
+    "name": "Азбука Вкуса Экспресс",
+    "amount": 1841,
+    "category": "Доставка еды",
+    "time": 1623322371
+  },
+  {
+    "id": 7,
+    "name": "Uber",
+    "amount": 369,
+    "category": "Транспорт",
+    "time": 1623416031
+  },
+  {
+    "id": 8,
+    "name": "Метро",
+    "amount": 100,
+    "category": "Транспорт",
+    "time": 1623416211
+  },
+  {
+    "id": 9,
+    "name": "Стоматология",
+    "amount": 8000,
+    "category": "Здоровье",
+    "time": 1623419811
+  },
+  {
+    "id": 10,
+    "name": "Пятерочка",
+    "amount": 809,
+    "category": "Продукты",
+    "time": 1623419934
+  },
+  {
+    "id": 11,
+    "name": "Бассейн",
+    "amount": 1000,
+    "category": "Спорт",
+    "time": 1623419934
+  },
+  {
+    "id": 12,
+    "name": "Uber",
+    "amount": 389,
+    "category": "Транспорт",
+    "time": 1623419934
+  },
+  {
+    "id": 13,
+    "name": "Стоматология",
+    "amount": 3000,
+    "category": "Здоровье",
+    "time": 1623419811
+  },
+  {
+    "id": 14,
+    "name": "Стоматология",
+    "amount": 1250,
+    "category": "Здоровье",
+    "time": 1623419811
+  },
+  {
+    "id": 15,
+    "name": "Стоматология",
+    "amount": 1500,
+    "category": "Здоровье",
+    "time": 1623419811
+  },
+  {
+    "id": 15,
+    "name": "Стоматология",
+    "amount": 1500,
+    "category": "Здоровье",
+    "time": 1623419811
+  }
+]

app/src/main/java/otus/homework/customview/BarChartView.kt

@@ -0,0 +1,126 @@
+package otus.homework.customview
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.RectF
+import android.util.AttributeSet
+import android.view.View
+import kotlin.math.min
+
+class BarChartView @JvmOverloads constructor (
+    context: Context,
+    attrs: AttributeSet? = null,
+) : View(context, attrs) {
+
+    private val list = ArrayList<PayLoadModel>()
+    private var maxValue = 0
+    private var barWidth = context.dpToPixels(50)
+    private var paintBaseFill : Paint = Paint()
+    private var paintText : Paint = Paint()
+    private var threshold: Int = Int.MAX_VALUE
+    private var paintStroke : Paint = Paint()
+    private val rect = RectF()
+    private val textAmountSize: Float = context.spToPixels(12)
+    private var wSize: Int = 0
+
+    companion object {
+        private const val DEFAULT_MARGIN_BAR_X = 30
+        private const val DEFAULT_MARGIN_TEXT_BOTTOM_Y = 30
+        private const val DEFAULT_MARGIN_TEXT_TOP_Y = 60
+    }
+
+    init {
+        val typedArray = context.obtainStyledAttributes(attrs, R.styleable.BarChartView)
+        val baseColor: Int =
+            typedArray.getColor(
+                R.styleable.BarChartView_baseColor, Color.parseColor("#1A237E"))
+        val threshold = typedArray.getInt(R.styleable.BarChartView_threshold, Int.MAX_VALUE)
+        val barWidth =
+            typedArray.getDimension(
+                R.styleable.BarChartView_barWidth, barWidth)
+        typedArray.recycle()
+        setup(baseColor, threshold, barWidth)
+    }
+
+    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+        val wMode = MeasureSpec.getMode(widthMeasureSpec)
+        wSize = MeasureSpec.getSize(widthMeasureSpec)
+        val hSize = MeasureSpec.getSize(heightMeasureSpec)
+
+        when (wMode) {
+            MeasureSpec.EXACTLY -> setMeasuredDimension(wSize, hSize)
+            MeasureSpec.AT_MOST -> {
+                val newW = Integer.min((list.size * barWidth).toInt(), wSize)
+                setMeasuredDimension(newW, hSize)
+            }
+            MeasureSpec.UNSPECIFIED -> setMeasuredDimension((list.size * barWidth).toInt(), hSize)
+        }
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        super.onDraw(canvas)
+
+        if (list.size == 0) return
+
+        val widthPerView = width.toFloat() / list.size
+        var currentX = 0f
+        val heightWithMargin = (height - 200)
+        val heightPerValue = heightWithMargin.toFloat() / maxValue
+
+        for (item in list) {
+            val barX = currentX + DEFAULT_MARGIN_BAR_X
+            val barY =
+                min((heightWithMargin - heightPerValue * item.amount) + DEFAULT_MARGIN_TEXT_TOP_Y,
+                    heightWithMargin.toFloat())
+            rect.set(
+                barX,
+                barY,
+                (currentX + widthPerView),
+                heightWithMargin.toFloat(),
+            )
+            canvas.drawRect(rect, paintBaseFill)
+            canvas.drawRect(rect, paintStroke)
+            canvas.drawText(item.amount.toString(), barX, barY - DEFAULT_MARGIN_TEXT_BOTTOM_Y, paintText)
+            currentX += widthPerView
+        }
+
+        canvas.drawLine(
+            DEFAULT_MARGIN_BAR_X.toFloat(),
+            heightWithMargin.toFloat(),
+            width.toFloat() + 100,
+            heightWithMargin.toFloat() , paintStroke)
+    }
+
+    fun setValues(values : List<PayLoadModel>) {
+        list.clear()
+        list.addAll(values)
+        maxValue = list.maxOf { it.amount }
+
+        requestLayout()
+        invalidate()
+    }
+
+    private fun setup(baseColor: Int, threshold : Int, barWidth : Float) {
+
+        paintBaseFill = Paint().apply {
+            color = baseColor
+            style = Paint.Style.FILL
+        }
+
+        paintText = Paint().apply {
+            color = baseColor
+            style = Paint.Style.FILL
+            textSize = textAmountSize
+        }
+
+        paintStroke = Paint().apply {
+            color = Color.BLACK
+            style = Paint.Style.STROKE
+            strokeWidth = 2.0f
+        }
+        this.threshold = threshold
+        this.barWidth = barWidth
+    }
+}

app/src/main/java/otus/homework/customview/BaseChartState.kt

@@ -0,0 +1,8 @@
+package otus.homework.customview
+
+import android.os.Parcelable
+import android.view.View
+
+class BaseChartState(
+    private val superSavedState: Parcelable?,
+    val dataList: List<PayLoadModel>): View.BaseSavedState(superSavedState), Parcelable

app/src/main/java/otus/homework/customview/BaseValueModel.kt

@@ -0,0 +1,3 @@
+package otus.homework.customview
+
+abstract class BaseValueModel

app/src/main/java/otus/homework/customview/Extensions.kt

@@ -0,0 +1,20 @@
+package otus.homework.customview
+
+import android.content.Context
+import android.graphics.Canvas
+import android.text.StaticLayout
+import android.util.TypedValue
+import androidx.core.graphics.withTranslation
+
+
+fun Context.dpToPixels(dp: Int) = dp * this.resources.displayMetrics.density
+
+fun Context.spToPixels(sp: Int) =
+    TypedValue.applyDimension(
+        TypedValue.COMPLEX_UNIT_SP, sp.toFloat(), this.resources.displayMetrics)
+
+fun StaticLayout.draw(canvas: Canvas, x: Float, y: Float) {
+    canvas.withTranslation(x, y) {
+        draw(this)
+    }
+}

app/src/main/java/otus/homework/customview/FileUtils.kt

@@ -0,0 +1,24 @@
+package otus.homework.customview
+
+import android.content.Context
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+
+class FileUtils {
+
+    object AssetsLoader {
+
+        fun loadTextFromAsset(context: Context, file: String): String {
+            return context.assets.open(file).bufferedReader().use { reader ->
+                reader.readText()
+            }
+        }
+
+        fun getDataFromText(text: String): List<PayLoadModel> {
+            val listPayLoadModelType = object : TypeToken<List<PayLoadModel>>() {}.type
+            val payloads: List<PayLoadModel> = Gson().fromJson(text, listPayLoadModelType)
+            return payloads
+        }
+
+    }
+}