Rebuild from scratch: Legacy Architecture for Android 7.1.2 (Java 8, AGP 7, WireGuard 2021)

app/build.gradle

@@ -10,24 +10,34 @@ android {
         applicationId "com.cbcren.vpn"
         minSdkVersion 21
         targetSdkVersion 33
-        versionCode 4
-        versionName "1.3-potato"
+        versionCode 1
+        versionName "1.0-legacy"
+        
         multiDexEnabled true
+        
+        // Forzar 32 bits (ARMv7)
         ndk {
-            // Forzar solo 32 bits (ARMv7). Muchas cajas chinas crashean si intentan cargar 64 bits o x86.
-            abiFilters 'armeabi-v7a' 
+            abiFilters 'armeabi-v7a'
         }
     }
     
+    // Soporte para Java 8 (Desugaring)
     compileOptions {
+        coreLibraryDesugaringEnabled true
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'com.google.android.material:material:1.2.1'
-    implementation 'androidx.multidex:multidex:2.0.1'
+    // Desugaring (Magia para que código nuevo corra en Android viejo)
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
+
+    // UI Básica (Versiones estables)
+    implementation 'androidx.appcompat:appcompat:1.4.0'
+    implementation 'com.google.android.material:material:1.5.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
+    
+    // WireGuard (Versión 2021, probada en Android 5+)
     implementation 'com.wireguard.android:tunnel:1.0.20211029'
 }