make text smaller

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

@@ -130,10 +130,11 @@ public class MainActivity extends AppCompatActivity {
             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));
+        }
     }
 
 

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/res/layout/fragment_setting.xml

@@ -1,38 +1,47 @@
 <?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"
@@ -40,17 +49,26 @@
             android:layout_height="wrap_content"
             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>