...

app/build.gradle.kts

@@ -1,4 +1,6 @@
 import org.jetbrains.kotlin.fir.scopes.debugCollectOverrides
+import java.text.SimpleDateFormat
+import java.util.Date
 
 plugins {
     id ("com.android.application")
@@ -25,12 +27,14 @@ android {
             isDebuggable = true
             applicationIdSuffix = ".debug"
             versionNameSuffix = "-debug"
+            buildConfigField("Long","BuildDateTime", getDateTime().toString().plus("L"))
             resValue ("string", "app_name", "Bums Launcher Debug")
         }
 
         getByName("release") {
             isMinifyEnabled = true
             isShrinkResources = true
+            buildConfigField("Long","BuildDateTime", getDateTime().toString().plus("L"))
             proguardFiles (getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
             resValue ("string", "app_name", "Bums Launcher")
         }
@@ -103,3 +107,4 @@ dependencies {
 //    implementation ("androidx.window:window:1.0.0")
 //    implementation("io.github.vaneproject:hanguleditor:1.0.0")
 }
+fun getDateTime() = SimpleDateFormat("yyyyMMddHHmm").format(Date()).toLong()