画面遷移が何故かできません

実現したいこと

クリックハンドラーで画面遷移をさせたい
・ボタンタップ→画面遷移
・MainActivity→AddActivityに遷移

発生している問題・エラーメッセージ

特にエラーコードは発生しておらず、ボタンをタップしても何も起こりません。
必要な記述は試しましたが、何が原因で動かないのか分からないので、教えて頂きたいです。

試したこと

・MainActivityにsetOnClickListenerを実装、Intentで画面遷移
・AndroidManifestにactivityの追加

該当のソースコード

▼MainActivity

Kotlin
1package com.example.showtextonmapapp
2
3import省略
4
5class MainActivity : AppCompatActivity(), OnMapReadyCallback {
6
7    private lateinit var mMap: GoogleMap
8    private val MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION = 1
9    private lateinit var fusedLocationProviderClient : FusedLocationProviderClient
10    private lateinit var lastLocation: Location
11    private var locationCallback : LocationCallback? = null
12    private lateinit var realm: Realm
13
14    override fun onCreate(savedInstanceState: Bundle?) {
15        super.onCreate(savedInstanceState)
16        setContentView(R.layout.activity_main)
17
18        //画面をスリープにしない
19        window.addFlags(FLAG_KEEP_SCREEN_ON)
20
21        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
22        val mapFragment = supportFragmentManager
23            .findFragmentById(R.id.map) as SupportMapFragment
24        mapFragment.getMapAsync(this)
25        fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)
26
27        realm = Realm.getDefaultInstance()
28        val toAddBtn: Button = findViewById(R.id.toAddBtn)
29        toAddBtn.setOnClickListener {
30            val intent = Intent(this, AddActivity::class.java)
31            intent.putExtra("lat", lastLocation.latitude)
32            intent.putExtra("lng", lastLocation.longitude)
33            startActivity(intent)
34        }
35    }
36
37    override fun onMapReady(googleMap: GoogleMap) {
38        mMap = googleMap
39
40        checkPermission()
41    }
42
43    private fun checkPermission() {
44        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
45            myLocationEnable()
46        } else {
47            requestLocationPermission()
48        }
49    }
50
51    private fun requestLocationPermission() {
52        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
53            //許可が拒否された場合
54            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION)
55        } else {
56            //許可も求めていない場合
57            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION)
58        }
59    }
60
61    override fun onRequestPermissionsResult(
62        requestCode: Int,
63        permissions: Array<out String>,
64        grantResults: IntArray
65    ) {
66        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
67        when(requestCode) {
68            MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION->{
69                if (permissions.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
70                    //許可された
71                    myLocationEnable()
72                } else {
73                    showToast("現在位置は表示できません")
74                }
75            }
76        }
77    }
78
79    private fun myLocationEnable() {
80        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
81            mMap.isMyLocationEnabled = true
82            val locationRequest = LocationRequest().apply {
83                interval = 10000
84                fastestInterval = 5000
85                priority = LocationRequest.PRIORITY_HIGH_ACCURACY
86            }
87            locationCallback = object : LocationCallback() {
88                override fun onLocationResult(locationResult: LocationResult?) {
89                    val textView : TextView = findViewById(R.id.textView)
90                    if (locationResult?.lastLocation != null) {
91                        lastLocation = locationResult.lastLocation
92                        val currentLatLng = LatLng(lastLocation.latitude, lastLocation.longitude)
93                        mMap.moveCamera(CameraUpdateFactory.newLatLng(currentLatLng))
94                        textView.text = "Lat:${lastLocation.latitude}, Lng:${lastLocation.longitude}"
95                    }
96                }
97            }
98            fusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, null)
99        }
100    }
101
102    private fun showToast(msg: String) {
103        val toast = Toast.makeText(this, msg, Toast.LENGTH_LONG)
104        toast.show()
105    }
106
107    override fun onPause() {
108        super.onPause()
109        if (locationCallback != null) {
110            fusedLocationProviderClient.removeLocationUpdates(locationCallback)
111        }
112    }
113
114    override fun onDestroy() {
115        super.onDestroy()
116        realm.close()
117    }
118
119}

▼AddActivity.kt

Kotlin
1package com.example.showtextonmapapp
2
3import androidx.appcompat.app.AppCompatActivity
4import android.os.Bundle
5import android.widget.Button
6import android.widget.EditText
7import android.widget.Toast
8import io.realm.Realm
9import io.realm.kotlin.createObject
10import io.realm.kotlin.where
11import java.util.*
12
13class AddActivity : AppCompatActivity() {
14    private lateinit var realm: Realm
15
16    override fun onCreate(savedInstanceState: Bundle?) {
17        super.onCreate(savedInstanceState)
18        setContentView(R.layout.activity_add)
19        realm = Realm.getDefaultInstance()
20
21        val lat = intent.getDoubleExtra("lat", 0.0)
22        val lng = intent.getDoubleExtra("lng", 0.0)
23        val saveBtn: Button = findViewById(R.id.saveBtn)
24        val cancelBtn: Button = findViewById(R.id.cancelBtn)
25
26        saveBtn.setOnClickListener {
27            val editText: EditText = findViewById(R.id.editText)
28            val shopInfoStr = editText.text?.toString() ?: ""
29            realm.executeTransaction {
30                val maxId = realm.where<ShopInfo>().max("id")
31                val nextId = (maxId?.toLong() ?: 0L) + 1L
32                val shopInfo = realm.createObject<ShopInfo>(nextId)
33                shopInfo.dateTime = Date()
34                shopInfo.lat = lat
35                shopInfo.lng = lng
36                shopInfo.shopInfo = shopInfoStr
37        }
38            showToast("保存しました")
39            finish()
40        }
41        cancelBtn.setOnClickListener {}
42        finish()
43    }
44
45    override fun onDestroy() {
46        super.onDestroy()
47        realm.close()
48    }
49
50    private fun showToast(msg: String) {
51        val toast = Toast.makeText(this, msg, Toast.LENGTH_LONG)
52        toast.show()
53    }
54}

▼activity_add.xml

Kotlin
1<?xml version="1.0" encoding="utf-8"?>
2<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
3    xmlns:app="http://schemas.android.com/apk/res-auto"
4    xmlns:tools="http://schemas.android.com/tools"
5    android:layout_width="match_parent"
6    android:layout_height="match_parent"
7    tools:context=".AddActivity">
8
9    <EditText
10        android:id="@+id/editText"
11        android:layout_width="wrap_content"
12        android:layout_height="wrap_content"
13        android:layout_marginStart="100dp"
14        android:layout_marginTop="150dp"
15        android:layout_marginEnd="100dp"
16        android:ems="10"
17        android:inputType="textPersonName"
18        android:text=""
19        app:layout_constraintEnd_toEndOf="parent"
20        app:layout_constraintHorizontal_bias="0.497"
21        app:layout_constraintStart_toStartOf="parent"
22        app:layout_constraintTop_toTopOf="parent" />
23
24    <Button
25        android:id="@+id/saveBtn"
26        android:layout_width="wrap_content"
27        android:layout_height="wrap_content"
28        android:layout_marginStart="100dp"
29        android:layout_marginTop="250dp"
30        android:text="保存"
31        app:layout_constraintStart_toStartOf="parent"
32        app:layout_constraintTop_toTopOf="parent" />
33
34    <Button
35        android:id="@+id/cancelBtn"
36        android:layout_width="wrap_content"
37        android:layout_height="wrap_content"
38        android:layout_marginTop="250dp"
39        android:layout_marginEnd="100dp"
40        android:text="キャンセル"
41        app:layout_constraintEnd_toEndOf="parent"
42        app:layout_constraintTop_toTopOf="parent" />
43
44    <TextView
45        android:id="@+id/textView3"
46        android:layout_width="wrap_content"
47        android:layout_height="wrap_content"
48        android:layout_marginTop="100dp"
49        android:text="テキストを入力してください"
50        app:layout_constraintEnd_toEndOf="parent"
51        app:layout_constraintStart_toStartOf="parent"
52        app:layout_constraintTop_toTopOf="parent" />
53</androidx.constraintlayout.widget.ConstraintLayout>

▼AndroidManifest.xml

Kotlin
1<?xml version="1.0" encoding="utf-8"?>
2<manifest xmlns:android="http://schemas.android.com/apk/res/android"
3    package="com.example.showtextonmapapp">
4
5    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
6    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
7
8    <application
9        android:name=".CustomApplication"
10        android:allowBackup="true"
11        android:icon="@mipmap/ic_launcher"
12        android:label="@string/app_name"
13        android:roundIcon="@mipmap/ic_launcher_round"
14        android:supportsRtl="true"
15        android:theme="@style/Theme.ShowTextOnMapApp">
16        <meta-data
17            android:name="com.google.android.geo.API_KEY"
18            android:value="@string/google_maps_key" />
19        <activity
20            android:name=".MainActivity"
21            android:exported="true">
22            <intent-filter>
23                <action android:name="android.intent.action.MAIN" />
24
25                <category android:name="android.intent.category.LAUNCHER" />
26            </intent-filter>
27        </activity>
28        <activity android:name=".AddActivity" />
29    </application>
30
31</manifest>