ДЗ к уроку про Custom View

app/build.gradle

@@ -1,6 +1,7 @@
 plugins {
     alias(libs.plugins.androidApplication)
     alias(libs.plugins.kotlinAndroid)
+    id 'kotlin-parcelize'
 }
 
 android {

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

@@ -1,11 +1,44 @@
 package otus.homework.customview
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import org.json.JSONArray
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        val pieChart = findViewById<ViraPieChartView>(R.id.pieChart)
+
+        pieChart.setOnSectorClickListener { category ->
+            Toast.makeText(this, category, Toast.LENGTH_SHORT).show()
+        }
+
+        val entries = loadEntriesFromRaw(R.raw.payload_7)
+        pieChart.setData(entries)
+    }
+
+    private fun loadEntriesFromRaw(rawResId: Int): List<ViraPieChartView.Entry> {
+        val json = resources.openRawResource(rawResId).bufferedReader().use { it.readText() }
+        val array = JSONArray(json)
+        val result = ArrayList<ViraPieChartView.Entry>(array.length())
+
+        for (i in 0 until array.length()) {
+            val obj = array.getJSONObject(i)
+            val amount = obj.optLong("amount", 0L)
+            if (amount <= 0L) continue
+
+            result.add(
+                ViraPieChartView.Entry(
+                    name = obj.optString("name", ""),
+                    category = obj.optString("category", ""),
+                    time = obj.optLong("time", 0L),
+                    amount = amount,
+                )
+            )
+        }
+        return result
     }
 }

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

@@ -0,0 +1,22 @@
+package otus.homework.customview
+
+import android.content.Context
+import android.util.TypedValue
+
+object ViewUtils {
+    fun dp(context: Context, value: Float): Int {
+        return TypedValue.applyDimension(
+            TypedValue.COMPLEX_UNIT_DIP,
+            value,
+            context.resources.displayMetrics,
+        ).toInt()
+    }
+
+    fun sp(context: Context, value: Float): Float {
+        return TypedValue.applyDimension(
+            TypedValue.COMPLEX_UNIT_SP,
+            value,
+            context.resources.displayMetrics,
+        )
+    }
+}