Correction bug, modernisation

app/build.gradle

@@ -2,9 +2,19 @@ plugins {
     id 'com.android.application'
 }
 
+// Load local.properties
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withInputStream { localProperties.load(it) }
+}
+
 android {
     namespace 'com.example.boidelov3'
     compileSdk 33
+    buildFeatures {
+        buildConfig = true
+    }
     packagingOptions { resources.excludes.add("META-INF/*") } // This line is added to avoid the error: Duplicate files copied in APK META-INF/LICENSE.txt
     defaultConfig {
         applicationId "com.example.boidelov3"
@@ -14,6 +24,11 @@ android {
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+        // Inject database credentials into BuildConfig
+        buildConfigField "String", "DB_URL", "\"${localProperties.getProperty('db.url', '')}\""
+        buildConfigField "String", "DB_USER", "\"${localProperties.getProperty('db.user', '')}\""
+        buildConfigField "String", "DB_PASSWORD", "\"${localProperties.getProperty('db.password', '')}\""
     }
 
     buildTypes {

app/src/main/java/com/example/boidelov3/DatabaseConnection.java

@@ -1,6 +1,7 @@
 package com.example.boidelov3;
 
 import android.os.AsyncTask;
+import com.example.boidelov3.BuildConfig;
 
 import com.impossibl.postgres.api.jdbc.PGConnection;
 
@@ -9,9 +10,9 @@ import java.sql.DriverManager;
 import java.sql.SQLException;
 
 public class DatabaseConnection extends AsyncTask<Void, Void, PGConnection> {
-    private static final String DB_URL = "jdbc:postgresql://82.65.214.214:5432/boidelo";
-    private static final String USER = "Tux2543";
-    private static final String PASSWORD = "6wa*teCnuxsG#grAc5HzC!Rh%#@c&";
+    private static final String DB_URL = BuildConfig.DB_URL;
+    private static final String USER = BuildConfig.DB_USER;
+    private static final String PASSWORD = BuildConfig.DB_PASSWORD;
 
     @Override
     protected PGConnection doInBackground(Void... params) {