[Gradle] Add configuration to store output files in release directory.

app/build.gradle

@@ -31,15 +31,6 @@ android {
     }
 
     buildTypes {
-        applicationVariants.all { variant ->
-            variant.outputs.all {
-                if (variant.buildType.name == "release") {
-                    outputFileName = "Edziennik_" + defaultConfig.versionName + ".apk"
-                } else {
-                    outputFileName = "Edziennik_" + defaultConfig.versionName + "_debug.apk"
-                }
-            }
-        }
         debug {
             minifyEnabled = false
         }
@@ -92,6 +83,30 @@ android {
     }
 }
 
+tasks.whenTaskAdded { task ->
+    if (!task.name.endsWith("Release") && !task.name.endsWith("ReleaseWithR8"))
+        return
+    def renameTaskName = "rename${task.name.capitalize()}"
+
+    def flavor = ""
+    if (task.name.startsWith("bundle"))
+        flavor = task.name.substring("bundle".length(), task.name.indexOf("Release")).uncapitalize()
+    if (task.name.startsWith("assemble"))
+        flavor = task.name.substring("assemble".length(), task.name.indexOf("Release")).uncapitalize()
+    if (task.name.startsWith("minify"))
+        flavor = task.name.substring("minify".length(), task.name.indexOf("Release")).uncapitalize()
+
+    if (flavor != "") {
+        tasks.create(renameTaskName, Copy) {
+            from file("${projectDir}/${flavor}/release/"), file("${buildDir}/outputs/mapping/${flavor}Release/")
+            include "*.aab", "*.apk", "mapping.txt", "output-metadata.json"
+            destinationDir file("${projectDir}/release/")
+            rename ".+?\\.(.+)", "Edziennik_${android.defaultConfig.versionName}_${flavor}." + '$1'
+        }
+        task.finalizedBy(renameTaskName)
+    }
+}
+
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')