draw function is not working as planed activate_btn "touched" just work when activate other action

app/src/main/java/com/example/acapendulum20/canvas/CanvasPendulum.kt

@@ -2,6 +2,7 @@ package com.example.acapendulum20.canvas
 
 import android.content.Context
 import android.graphics.Canvas
+import android.graphics.Color
 import android.graphics.Paint
 import android.util.AttributeSet
 import android.view.View
@@ -11,32 +12,48 @@ class CanvasPendulum @JvmOverloads constructor(
 ) : View(context, attrs, defStyleAttr) {
 
 
-    val paint: Paint = Paint()
-    lateinit var canvas: Canvas
+    private val paint: Paint = Paint()
+    private lateinit var canvas: Canvas
+    private var pendulumLineStopX = 200f
+    private var pendulumLineStopY = 600f
+    //var pendulumOnMove = false
+
+
+
 
     override fun onDraw(canvas: Canvas?) {
         super.onDraw(canvas)
 
+        paint.style = Paint.Style.STROKE
+        //paint.strokeWidth = 10f
+        //canvas?.drawCircle(500f, 700f, 70f, paint)
+        paint.strokeWidth = 9f
+        canvas?.drawLine(455f,0f,500f, 630f,paint)
+
         //if canvas not NULL then this canvas = it
         canvas?.let {
             this.canvas = it
         }
-
     }
 
-    fun drawPendulum() {
+    fun startPendulum() {
+        //pendulumOnMove = false
         paint.style = Paint.Style.STROKE
-        paint.strokeWidth = 10f
-        canvas.drawCircle(500f, 700f, 70f, paint)
+        //paint.strokeWidth = 10f
+        //canvas.drawCircle(200f, 700f, 70f, paint)// cx&cy -> Variable
         paint.strokeWidth = 9f
-        canvas.drawLine(455f,0f,500f, 630f,paint)
+        canvas.drawColor(Color.WHITE)
+        canvas.drawLine(455f,0f,pendulumLineStopX, pendulumLineStopY,paint) //stopX&stopY -> Variable
+        println("excess to startPendulum function")
     }
 
     fun stopDrawingPendulum() {
-        canvas.drawCircle(400f, 300f, 70f, paint)
+        //canvas.drawCircle(400f, 300f, 70f, paint)
+        //pendulumOnMove = false
+        //canvas.drawColor(Color.WHITE)
+        //canvas.drawLine(455f,0f,500f, 630f,paint) //stopX&stopY -> Variable
+        println("excess to stopDrawingPendulum function")
     }
-
-
 }
 
 

app/src/main/java/com/example/acapendulum20/fragments/pendulum/PendulumFragment.kt

@@ -1,6 +1,6 @@
 package com.example.acapendulum20.fragments.pendulum
 
-import android.graphics.Canvas
+import android.annotation.SuppressLint
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.MotionEvent
@@ -8,58 +8,53 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Button
 import androidx.fragment.app.Fragment
-import androidx.lifecycle.ViewModelProvider
 import com.example.acapendulum20.R
 import com.example.acapendulum20.canvas.CanvasPendulum
-import com.google.android.material.canvas.CanvasCompat
-import kotlinx.android.synthetic.main.fragment_pendulum.view.*
 
 
 class PendulumFragment : Fragment() {
 
+    @SuppressLint("ClickableViewAccessibility")
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
         // Inflate the layout for this fragment
         val view = inflater.inflate(R.layout.fragment_pendulum, container, false)
-        val mCanvasPendulum: CanvasPendulum
-        mCanvasPendulum = view.findViewById(R.id.canvasContainer)!!
+        val mCanvasPendulum: CanvasPendulum = view.findViewById(R.id.canvasContainer)!!
 
         //activate the magnet
         val button = view.findViewById<Button>(R.id.activate_btn)
 
-        /*
-        button.setOnClickListener{
-            mCanvasPendulum.drawBob()
-            mCanvasPendulum.drawLine()
-        }*/
 
-            button.setOnTouchListener { v, event ->
-            val action = event.action
-            when(action){
+        //button.setOnClickListener{
+        //    mCanvasPendulum.startPendulum()
+        //}
+
+
+        button.setOnTouchListener { _, event ->
+            when (event.action) {
 
                 MotionEvent.ACTION_DOWN -> {
-                    mCanvasPendulum.drawPendulum()
+                    println("button gedrückt")
+                    mCanvasPendulum.startPendulum()
                 }
 
-                MotionEvent.ACTION_MOVE -> { }
+                //MotionEvent.ACTION_MOVE -> {}
 
                 MotionEvent.ACTION_UP -> {
+                    println("button losgelassen")
                     mCanvasPendulum.stopDrawingPendulum()
                 }
 
-                MotionEvent.ACTION_CANCEL -> {
-
-                }
+                //MotionEvent.ACTION_CANCEL -> { }
 
-                else ->{
-
-                }
+                //else -> {}
             }
             true
         }
 
+
         //System.currentTimeMillis()
         //System.nanoTime()
 

build.gradle

@@ -10,8 +10,8 @@ buildscript {
 }
 
 plugins {
-    id 'com.android.application' version '7.1.3' apply false
-    id 'com.android.library' version '7.1.3' apply false
+    id 'com.android.application' version '7.2.0' apply false
+    id 'com.android.library' version '7.2.0' apply false
     id 'org.jetbrains.kotlin.android' version '1.6.21' apply false
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Tue Apr 19 09:09:32 CEST 2022
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME