Merge pull request '設定画面のレイアウトを修正' (#39) from rca/workaround into main

Reviewed-on: #39

app/src/main/AndroidManifest.xml

@@ -8,6 +8,7 @@
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

app/src/main/java/com/example/childguard/MainActivity.java

@@ -32,7 +32,6 @@ import com.google.firebase.firestore.FirebaseFirestore;
 import com.journeyapps.barcodescanner.ScanContract;
 import com.journeyapps.barcodescanner.ScanOptions;
 
-// Manifest
 import android.Manifest;
 
 import java.util.HashMap;
@@ -41,15 +40,12 @@ import java.util.Map;
 public class MainActivity extends AppCompatActivity {
 
     FirebaseFirestore db;
-
-
     DocumentReference mDocRef;
 
-    private HomeFragment homeFragment = HomeFragment.newInstance("test", "test");;
+    private HomeFragment homeFragment = HomeFragment.newInstance("test", "test");
 
     public static final String TAG = "InspirationQuote";
 
-
     private final ActivityResultLauncher<ScanOptions> QrLauncher = registerForActivityResult(
             new ScanContract(),
             result -> {
@@ -77,7 +73,7 @@ public class MainActivity extends AppCompatActivity {
         SharedPreferences.Editor e = pref.edit();
         e.putBoolean("connection_status", false);
 
-
+        // Check permissions
         if (!hasPermissions()) {
             requestPermissions();
         }
@@ -85,15 +81,14 @@ public class MainActivity extends AppCompatActivity {
         BottomNavigationView bottomNavigationView = findViewById(R.id.nav_view);
 
         this.homeFragment = HomeFragment.newInstance("test", "test");
-        if(savedInstanceState == null){
+        if (savedInstanceState == null) {
             getSupportFragmentManager().beginTransaction()
                     .replace(findViewById(R.id.fragmentContainerView).getId(), this.homeFragment)
                     .addToBackStack(null)
                     .commit();
         }
 
-        bottomNavigationView.setOnNavigationItemSelectedListener(v ->
-        {
+        bottomNavigationView.setOnNavigationItemSelectedListener(v -> {
             if (v.getItemId() == findViewById(R.id.navigation_home).getId()) {
                 Log.d("MainActivity", "navigation_home: called");
                 findViewById(R.id.fab_scan_qr_code).setVisibility(FrameLayout.VISIBLE);
@@ -101,8 +96,6 @@ public class MainActivity extends AppCompatActivity {
                         .replace(findViewById(R.id.fragmentContainerView).getId(), this.homeFragment)
                         .addToBackStack(null)
                         .commit();
-                //firebaseLink();
-
             } else if (v.getItemId() == findViewById(R.id.navigation_settings).getId()) {
                 Log.d("MainActivity", "navigation_settings: called");
                 findViewById(R.id.fab_scan_qr_code).setVisibility(FrameLayout.GONE);
@@ -130,16 +123,18 @@ public class MainActivity extends AppCompatActivity {
         intentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
 
         db = FirebaseFirestore.getInstance();//Firebaseとの紐づけ
-        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
+
+        String btPermission = getBluetoothConnectPermission();
+        if (ActivityCompat.checkSelfPermission(this, btPermission) != PackageManager.PERMISSION_GRANTED) {
             Log.d("BT", "No permission to connect bluetooth devices");
             return;
         } else {
             Log.d("BT", "Permission to connect bluetooth devices granted");
-        }
+
             registerReceiver(receiver, intentFilter);
 
-        //startForegroundService(new Intent(this, SurveillanceService.class));
-
+            startForegroundService(new Intent(this, SurveillanceService.class));
+        }
     }
 
 
@@ -147,16 +142,21 @@ public class MainActivity extends AppCompatActivity {
     protected void onResume() {
         super.onResume();
         Log.d("MainActivity onResume", "called");
-//        Log.d("MainActivity onResume", "mDocRef is null");
         firebaseLink();
     }
+
+    // 権限チェック用ヘルパーメソッドを追加
+    private String getBluetoothConnectPermission() {
+        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) ?
+                Manifest.permission.BLUETOOTH_CONNECT :
+                Manifest.permission.BLUETOOTH;
+    }
+
     /**
      * 乗車状態の変更
      */
     public void changeIsInCar() {
-        //共有プリファレンス全体の準備
         SharedPreferences sharedPreferences = MainActivity.this.getSharedPreferences("app_situation", MODE_PRIVATE);
-        //共有プリファレンス 書き込みの準備
         SharedPreferences.Editor E = sharedPreferences.edit();
         SharedPreferences.Editor E2 = sharedPreferences.edit();
         String IdPref = sharedPreferences.getString("ID", null);//アプリに記録されているIDの取得
@@ -168,41 +168,87 @@ public class MainActivity extends AppCompatActivity {
         Map<String, Boolean> DEFAULT_ITEM = new HashMap<>();//mapの宣言
         if (!change) {
             //isInCarをtrueに更新
-            Log.d("MainActivity", "change:"+change);
+            Log.d("MainActivity", "change:" + change);
             E.putBoolean("change", true);
             E.apply();
-            Log.d("MainActivity", "change:"+sharedPreferences.getBoolean("change",false));
+            Log.d("MainActivity", "change:" + sharedPreferences.getBoolean("change", false));
         } else {
-            Log.d("MainActivity", "change:"+change);
+            Log.d("MainActivity", "change:" + change);
             E.putBoolean("change", false);
             E.apply();
-            Log.d("MainActivity", "change:"+sharedPreferences.getBoolean("change",false));
+            Log.d("MainActivity", "change:" + sharedPreferences.getBoolean("change", false));
         }
-        Log.d("MainActivity", "changeIsInCar: "+sharedPreferences.getBoolean("change",false));
-        isReported.update("isInCar", sharedPreferences.getBoolean("change",false)).addOnSuccessListener(unused -> Log.d(TAG, "DocumentSnapshot successfully updated!!")).addOnFailureListener(e -> Log.w(TAG, "Error updating document", e));
-        E2.putBoolean("isInCarPref", sharedPreferences.getBoolean("change",false));
+        Log.d("MainActivity", "changeIsInCar: " + sharedPreferences.getBoolean("change", false));
+        isReported.update("isInCar", sharedPreferences.getBoolean("change", false))
+                .addOnSuccessListener(unused -> Log.d(TAG, "DocumentSnapshot successfully updated!!"))
+                .addOnFailureListener(e -> Log.w(TAG, "Error updating document", e));
+        E2.putBoolean("isInCarPref", sharedPreferences.getBoolean("change", false));
         E2.apply();
     }
 
-
-
+    /**
+     * 権限の保有を確認する
+     * @return
+     */
     private boolean hasPermissions() {
-        return ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADMIN) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_SCAN) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.VIBRATE) == PackageManager.PERMISSION_GRANTED &&
-                ActivityCompat.checkSelfPermission(this, Manifest.permission.FOREGROUND_SERVICE) == PackageManager.PERMISSION_GRANTED;
+        boolean allGranted = true;
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+            // <= Android 11 (API 30)
+            allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH)
+                    == PackageManager.PERMISSION_GRANTED);
+            allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADMIN)
+                    == PackageManager.PERMISSION_GRANTED);
+        } else {
+            // >= Android 12 (API 31)
+            allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_SCAN)
+                    == PackageManager.PERMISSION_GRANTED);
+            allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT)
+                    == PackageManager.PERMISSION_GRANTED);
         }
 
+        // Location
+        allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
+                == PackageManager.PERMISSION_GRANTED);
+        allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
+                == PackageManager.PERMISSION_GRANTED);
+
+        // >= Android 13 (API 32)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)
+                    == PackageManager.PERMISSION_GRANTED);
+        }
+
+        // Others
+        allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.VIBRATE)
+                == PackageManager.PERMISSION_GRANTED);
+        allGranted &= (ActivityCompat.checkSelfPermission(this, Manifest.permission.FOREGROUND_SERVICE)
+                == PackageManager.PERMISSION_GRANTED);
+
+        return allGranted;
+    }
+
+    /**
+     * 権限のリクエストを行う
+     */
     private void requestPermissions() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+            // <= Android 11 (API 30)
             ActivityCompat.requestPermissions(this,
                     new String[]{
                             Manifest.permission.BLUETOOTH,
                             Manifest.permission.BLUETOOTH_ADMIN,
+                            Manifest.permission.ACCESS_FINE_LOCATION,
+                            Manifest.permission.ACCESS_COARSE_LOCATION,
+                            Manifest.permission.VIBRATE,
+                            Manifest.permission.FOREGROUND_SERVICE,
+                    },
+                    2
+            );
+        } else {
+            // >= Android 12 (API 31)
+            ActivityCompat.requestPermissions(this,
+                    new String[]{
                             Manifest.permission.BLUETOOTH_SCAN,
                             Manifest.permission.BLUETOOTH_CONNECT,
                             Manifest.permission.ACCESS_FINE_LOCATION,
@@ -211,11 +257,15 @@ public class MainActivity extends AppCompatActivity {
                             Manifest.permission.VIBRATE,
                             Manifest.permission.FOREGROUND_SERVICE
                     },
-                2);
+                    2
+            );
+        }
     }
 
     @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+    public void onRequestPermissionsResult(int requestCode,
+                                           @NonNull String[] permissions,
+                                           @NonNull int[] grantResults) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         if (requestCode == 2) {
             if (!hasPermissions()) {
@@ -224,20 +274,17 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
-
     /**
      * FireBaseのIDの取得
      */
     public void firebaseLink() {//Firebaseのドキュメントの取得
         Log.d("MainActivity", "firebaseLink: called");
-        //共有プリファレンス全体の準備
         SharedPreferences sharedPreferences = getSharedPreferences("app_situation", MODE_PRIVATE);
         String IdPref = sharedPreferences.getString("ID", null);//アプリに記録されているIDの取得
         if (IdPref == null) {
             Log.d("onResume", "ID not initialized.");
         } else {
             mDocRef = FirebaseFirestore.getInstance().document("status/" + IdPref);//現在の位置を取得
-            //updateIsInCarPref(mDocRef);//現在の位置を引数に initNotification()を処理
         }
     }
 
@@ -246,7 +293,8 @@ public class MainActivity extends AppCompatActivity {
         intentFilter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
         intentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
 
-        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
+        String btPermission = getBluetoothConnectPermission();
+        if (ActivityCompat.checkSelfPermission(this, btPermission) != PackageManager.PERMISSION_GRANTED) {
             Log.d("BT", "No permission to connect bluetooth devices");
             return;
         } else {
@@ -255,22 +303,23 @@ public class MainActivity extends AppCompatActivity {
         registerReceiver(receiver, intentFilter);
     }
 
-
     private final BroadcastReceiver receiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             SharedPreferences pref = getSharedPreferences("Bluetooth_situation", MODE_PRIVATE);
             SharedPreferences.Editor e = pref.edit();
-            String action = intent.getAction(); // may need to chain this to a recognizing function
+            String action = intent.getAction();
             BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
-            Boolean isInCar = pref.getBoolean("isInCarPref", false);
-            if (ActivityCompat.checkSelfPermission(context, android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
+            boolean isInCar = pref.getBoolean("isInCarPref", false);
+            String btPermission = getBluetoothConnectPermission();
+            if (ActivityCompat.checkSelfPermission(context, btPermission) != PackageManager.PERMISSION_GRANTED) {
                 Log.d("BT", "No permission to connect bluetooth devices");
                 return;
             }
             String deviceHardwareAddress = device.getAddress(); // MAC address
 
-            String registeredId = PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).getString("bluetooth_device_id", "none");
+            String registeredId = PreferenceManager.getDefaultSharedPreferences(getApplicationContext())
+                    .getString("bluetooth_device_id", "none");
 
             if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
                 //Bluetoothデバイスが接続されたときの処理
@@ -283,7 +332,7 @@ public class MainActivity extends AppCompatActivity {
                     Log.d("BT_Judge", "登録済み");
                     changeBluetooth(true);
                     e.putBoolean("connection_status", true);
-                    if(homeFragment != null && homeFragment.isVisible()){
+                    if (homeFragment != null && homeFragment.isVisible()) {
                         homeFragment.updateBluetoothSituation(true);
                     }
                 } else {
@@ -293,10 +342,10 @@ public class MainActivity extends AppCompatActivity {
                 }
                 e.apply();
 
-            }else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
+            } else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
                 //bluetoothデバイスが切断されたときの処理
                 changeBluetooth(false);
-                if(homeFragment != null && homeFragment.isVisible()){
+                if (homeFragment != null && homeFragment.isVisible()) {
                     homeFragment.updateBluetoothSituation(false);
                 }
             }
@@ -307,7 +356,9 @@ public class MainActivity extends AppCompatActivity {
      * Bluetoothの接続状態を変更するメソッド
      */
     public void changeBluetooth(boolean actual) {
-        getSharedPreferences("Bluetooth_situation", MODE_PRIVATE).edit().putBoolean("status", actual).apply();
+        getSharedPreferences("Bluetooth_situation", MODE_PRIVATE)
+                .edit()
+                .putBoolean("status", actual)
+                .apply();
     }
 }
-

app/src/main/java/com/example/childguard/SurveillanceService.java

@@ -1,5 +1,6 @@
 package com.example.childguard;
 
+import android.Manifest;
 import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
@@ -12,6 +13,7 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.VibrationEffect;
@@ -169,7 +171,8 @@ public class SurveillanceService extends Service {
      * @return Bluetoothの権限の有無 true: 許可されていない false: 許可されている
      */
     private boolean isNotBluetoothGranted() {
-        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
+        String btPermission = getBluetoothConnectPermission();
+        if (ActivityCompat.checkSelfPermission(this, btPermission) != PackageManager.PERMISSION_GRANTED) {
             Log.d(TAG, "Bluetoothの権限が許可されていません");
             return true;
         } else {
@@ -190,6 +193,16 @@ public class SurveillanceService extends Service {
         registerReceiver(receiver, intentFilter);
     }
 
+    /**
+     * Bluetoothの接続権限を取得
+     * @return Bluetoothの接続権限
+     */
+    private String getBluetoothConnectPermission() {
+        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) ?
+                android.Manifest.permission.BLUETOOTH_CONNECT :
+                Manifest.permission.BLUETOOTH;
+    }
+
     /**
      * Firestoreのスナップショットリスナーを設定
      * @param mDocRef Firestoreのドキュメントリファレンス

app/src/main/java/com/example/childguard/bluetooth_setupFragment.java

@@ -7,6 +7,7 @@ import android.bluetooth.BluetoothDevice;
 import android.bluetooth.BluetoothManager;
 import android.content.Context;
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.Bundle;
 
 import androidx.core.app.ActivityCompat;
@@ -23,6 +24,7 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import java.util.ArrayList;
 import java.util.Objects;
@@ -91,15 +93,36 @@ public class bluetooth_setupFragment extends Fragment {
         }
 
 
+//        if (ActivityCompat.checkSelfPermission(requireActivity().getApplicationContext(), android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
+//            // TODO: Consider calling
+//            //    ActivityCompat#requestPermissions
+//            // here to request the missing permissions, and then overriding
+//            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
+//            //                                          int[] grantResults)
+//            // to handle the case where the user grants the permission. See the documentation
+//            // for ActivityCompat#requestPermissions for more details.
+//            return view;
+//        }
+
+        // >= Android 12
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
+            if (ActivityCompat.checkSelfPermission(requireActivity().getApplicationContext(), android.Manifest.permission.BLUETOOTH) != PackageManager.PERMISSION_GRANTED) {
+                Log.w("Bluetooth", "Permission not granted(Android 12-)");
+                // show toast then force close the app (Workaround)
+                Toast.makeText(requireActivity().getApplicationContext(), "Bluetoothの権限が必須です!", Toast.LENGTH_SHORT).show();
+                requireActivity().finish();
+            } else {
+                Log.w("Bluetooth", "Permission granted(Android 12-)");
+            }
+        } else {
             if (ActivityCompat.checkSelfPermission(requireActivity().getApplicationContext(), android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
-            // TODO: Consider calling
-            //    ActivityCompat#requestPermissions
-            // here to request the missing permissions, and then overriding
-            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
-            //                                          int[] grantResults)
-            // to handle the case where the user grants the permission. See the documentation
-            // for ActivityCompat#requestPermissions for more details.
-            return view;
+                Log.w("Bluetooth", "Permission not granted(Android 12+)");
+                // show toast then force close the app (Workaround)
+                Toast.makeText(requireActivity().getApplicationContext(), "Bluetoothの権限が必須です!", Toast.LENGTH_SHORT).show();
+                requireActivity().finish();
+            } else {
+                Log.w("Bluetooth", "Permission granted(Android 12+)");
+            }
         }
         Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
 

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

@@ -1,56 +1,74 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<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"
     android:orientation="vertical"
-    tools:context=".SettingFragment"
-    android:padding="16dp">
+    android:padding="16dp"
+    tools:context=".SettingFragment">
 
 
+    <LinearLayout
+        android:id="@+id/linearLayout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
         <ImageView
-        android:src="@drawable/bluetooth_and_qr2"
-        android:layout_gravity="center_horizontal"
             android:layout_width="wrap_content"
             android:layout_height="200dp"
-        android:layout_marginTop="150dp"
-        />
+            android:layout_gravity="center_horizontal"
+            android:src="@drawable/bluetooth_and_qr2" />
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-        android:textColor="@color/black"
-        android:text="QRコード印刷とBluetooth設定"
             android:layout_gravity="center_horizontal"
-        android:textStyle="bold"
-        android:textSize="18dp"
             android:layout_marginTop="20dp"
-        />
+            android:text="QRコード印刷とBluetooth設定"
+            android:textColor="@color/black"
+            android:textSize="18dp"
+            android:textStyle="bold" />
 
         <Button
             android:id="@+id/button_bluetooth_setting"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-        android:text="Bluetooth設定"
             android:layout_marginTop="120dp"
-        android:layout_marginBottom="20dp"/>
+            android:layout_marginBottom="20dp"
+            android:text="Bluetooth設定" />
 
         <Button
             android:id="@+id/button_print_qr"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-        android:text="QRコード印刷"/>
+            android:text="QRコード印刷" />
 
+    </LinearLayout>
 
     <LinearLayout
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:gravity="bottom">
+        android:layout_height="wrap_content"
+        android:gravity="bottom"
+        app:layout_constraintBottom_toTopOf="@+id/linearLayout"
+        tools:layout_editor_absoluteX="16dp">
+
+    </LinearLayout>
 
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="QRコードは株式会社デンソーウェーブの登録商標です"
-            android:textColor="@color/black" />
-    </LinearLayout>
+        android:textColor="@color/black"
+        android:textSize="12sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
 
-</LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>