premiere page mais crash

.idea/gradle.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>

.idea/misc.xml

-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">

app/src/main/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://schemas.android.com/tools" >
 
     <application
         android:allowBackup="true"
@@ -11,10 +11,16 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.LeBonCoin"
-        tools:targetApi="31">
+        tools:targetApi="31" >
+        <activity
+            android:name=".galerie"
+            android:exported="false" />
+        <activity
+            android:name=".ajout"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
-            android:exported="true">
+            android:exported="true" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/example/leboncoin/MainActivity.kt

 package com.example.leboncoin
 
-import androidx.appcompat.app.AppCompatActivity
+import android.content.Intent
 import android.os.Bundle
+import android.widget.Button
+import android.widget.EditText
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
-    override fun onCreate(savedInstanceState: Bundle?) {
+    public override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        val l1 = LinearLayout(this)
+        l1.orientation = LinearLayout.VERTICAL
+        val t1 = TextView(this)
+        t1.text = "Bienvenue sur LeBonCoin!"
+        l1.addView(t1)
+
+        val t = EditText(this)
+        val b = Button(this)
+        b.text = "Acceder à la galerie"
+        b.height = 200
+
+        b.setOnClickListener {
+            val lancementSecondeActivite = Intent(
+                this@MainActivity,
+                galerie::class.java
+            )
+
+            startActivity(lancementSecondeActivite)
+        }
+        val c = Button(this)
+        c.text = "Ajouter un truc"
+        c.height = 200
+        c.setOnClickListener {
+            val lancementTroisiemeActivite = Intent(
+                this@MainActivity,
+                ajout::class.java
+            )
+
+            startActivity(lancementTroisiemeActivite)
+        }
+
+        l1.addView(t)
+        l1.addView(b)
+        l1.addView(c)
+        setContentView(l1)
+
     }
 }
\ No newline at end of file

app/src/main/java/com/example/leboncoin/ajout.kt

+package com.example.leboncoin
+
+import android.hardware.Sensor
+import android.hardware.SensorManager
+import android.os.Bundle
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+
+class ajout : AppCompatActivity() {
+    public override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val l1 = LinearLayout(this)
+        l1.orientation = LinearLayout.VERTICAL
+        val t1 = TextView(this)
+        t1.text = "Bienvenue sur LeBonCoin!"
+        l1.addView(t1)
+        setContentView(l1)
+    }
+}

app/src/main/java/com/example/leboncoin/galerie.kt

+package com.example.leboncoin
+
+import android.os.Bundle
+
+
+import android.app.Activity
+import android.hardware.Sensor
+import android.hardware.SensorEvent
+import android.hardware.SensorEventListener
+import android.hardware.SensorManager
+import android.util.Log
+import android.widget.EditText
+import android.widget.LinearLayout
+
+class galerie : Activity(), SensorEventListener {
+    private var mSensorManager: SensorManager? = null
+    private var accelerometer: Sensor? = null
+    private var V: EditText? = null
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val M1 = LinearLayout(this)
+        M1.orientation = LinearLayout.VERTICAL
+        V = EditText(this)
+        val C = EditText(this)
+        V!!.setText(" ")
+        C.setText("VITESSE")
+        M1.addView(C)
+        M1.addView(V)
+        setContentView(M1)
+        mSensorManager = getSystemService(SENSOR_SERVICE) as SensorManager
+        // on recupere l accelerometre a partir du SensorManager
+        accelerometer = mSensorManager!!.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
+        // on associe l ecouteur d’ evenements au SensorManager
+        mSensorManager!!.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL)
+    }
+
+    override fun onAccuracyChanged(
+        sensor: Sensor,
+        accuracy: Int
+    ) { // TODO Auto−generated method stub
+    }
+
+    override fun onSensorChanged(event: SensorEvent) { // TODO Auto−generated method stub
+        val gammaX = event.values[0]
+        val gammaY = event.values[1]
+        val gammaZ = event.values[2]
+        Log.d("Valeurs accelerometre", "$gammaX,$gammaY,$gammaZ")
+        V!!.setText(gammaX.toString())
+    }
+}
\ No newline at end of file

app/src/main/res/layout/activity_ajout1.xml

+<?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=".ajout1">
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

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

+<?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=".test">
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file