random shots

app/src/main/AndroidManifest.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="ru.panorobot.airshot">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Airshot"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/ru/panorobot/airshot/Draw2D.kt

@@ -0,0 +1,69 @@
+//https://developer.alexanderklimov.ru/android/simplepaint.php
+
+package ru.panorobot.airshot
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.view.View
+import kotlin.random.Random
+
+class Draw2D(context: Context?) : View(context) {
+    private val paint: Paint = Paint()
+    private val shots:Shots = Shots()
+
+    override fun setOnClickListener(l: OnClickListener?) {
+        super.setOnClickListener(l)
+        invalidate()
+    }
+
+    override fun onDraw(canvas: Canvas?) {
+        super.onDraw(canvas)
+        val screenWidth: Int = getWidth()
+        val screenHeight: Int = getHeight()
+
+        drawTarget(canvas)
+        shots.draw(canvas,screenWidth, screenHeight)
+
+    }
+
+
+    private fun drawTarget(canvas: Canvas?) {
+        paint.apply {
+            style = Paint.Style.FILL // стиль Заливка
+            color = Color.WHITE // закрашиваем холст белым цветом
+        }
+        canvas?.drawPaint(paint)
+
+        paint.apply {
+            isAntiAlias = true
+            color = Color.BLACK
+        }
+
+        val screenWidth: Int = getWidth()
+        val screenHeight: Int = getHeight()
+        val centerX = width / 2
+        val centerY = height / 2
+
+        var radiusSun: Int = (screenWidth + screenHeight) / 30
+        canvas!!.drawCircle(centerX.toFloat(), centerY.toFloat(), radiusSun.toFloat(), paint)
+
+        paint.apply {
+            style = Paint.Style.STROKE
+        }
+        var radius = radiusSun * 2
+        canvas!!.drawCircle(centerX.toFloat(), centerY.toFloat(), radius.toFloat(), paint)
+
+        radius = radiusSun * 3
+        canvas!!.drawCircle(centerX.toFloat(), centerY.toFloat(), radius.toFloat(), paint)
+
+        radius = radiusSun * 4
+        canvas!!.drawCircle(centerX.toFloat(), centerY.toFloat(), radius.toFloat(), paint)
+
+        radius = radiusSun * 5
+        canvas!!.drawCircle(centerX.toFloat(), centerY.toFloat(), radius.toFloat(), paint)
+    }
+
+
+}

app/src/main/java/ru/panorobot/airshot/MainActivity.kt

@@ -0,0 +1,13 @@
+package ru.panorobot.airshot
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class MainActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+//        setContentView(R.layout.activity_main)
+        val draw2D = Draw2D(this)
+        setContentView(draw2D)
+    }
+}

app/src/main/java/ru/panorobot/airshot/Shot.kt

@@ -0,0 +1,6 @@
+package ru.panorobot.airshot
+
+class Shot(x: Int = 0, y: Int = 0) {
+    var x = x
+    var y = y
+}

app/src/main/java/ru/panorobot/airshot/Shots.kt

@@ -0,0 +1,45 @@
+package ru.panorobot.airshot
+
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import kotlin.random.Random
+
+class Shots {
+    private var arrayOfShots: Array<Shot> = arrayOf(
+        Shot(50,70),
+        Shot(200,100),
+        Shot(50,50),
+        Shot(70,300),
+        Shot(10,20),
+    )
+
+    private fun randomizeShots(screenWidth: Int, screenHeight: Int){
+        for (shot in arrayOfShots) {
+            shot.x = Random.nextInt(0, screenWidth)
+            shot.y = Random.nextInt(0, screenHeight)
+        }
+    }
+
+    fun draw(canvas: Canvas?, screenWidth: Int, screenHeight: Int){
+        val paint: Paint = Paint()
+        paint.apply {
+            style = Paint.Style.FILL // стиль Заливка
+            color = Color.WHITE // белая кайма вокруг
+        }
+
+        randomizeShots(screenWidth, screenHeight)
+        for (shot in arrayOfShots){
+            val x = shot.x
+            val y = shot.y
+            var radius: Int = (screenWidth + screenHeight) / 100
+            canvas!!.drawCircle(x.toFloat(), y.toFloat(), radius.toFloat(), paint)
+
+            paint.apply {
+                color = Color.BLACK // закрашиваем холст белым цветом
+            }
+            radius = (screenWidth + screenHeight) / 120
+            canvas.drawCircle(x.toFloat(), y.toFloat(), radius.toFloat(), paint)
+        }
+    }
+}

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

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>