Bluetoothデバイスを保存する機能を追加

app/src/androidTest/java/com/example/childguard/Bluetooth_device_save.java

@@ -1,21 +0,0 @@
-package com.example.childguard;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-
-import androidx.appcompat.app.AppCompatActivity;
-
-public class Bluetooth_device_save extends AppCompatActivity {
-    final SharedPreferences pref= PreferenceManager.getDefaultSharedPreferences(this);
-    public Bluetooth_device_save() {
-    }
-    public void device_save(String deviceAddress){
-        SharedPreferences.Editor e=pref.edit();
-        e.putString("bluetooth_device1",deviceAddress);
-        e.apply();
-    }
-    public String device_info(){
-        return pref.getString("bluetooth_device1","not_device");
-    }
-}