Fix gradle.

Author: rome753

activitytasklib/build.gradle

@@ -1,6 +1,11 @@
 apply plugin: 'com.android.library'
 apply plugin: 'maven-publish'
 
+task generateSourcesJar(type: Jar){
+    from android.sourceSets.main.java.srcDirs
+    classifier  'sources'
+}
+
 android {
     compileSdkVersion 31
 
@@ -14,11 +19,19 @@ android {
         consumerProguardFiles "consumer-rules.pro"
     }
 
+    publishing {
+        singleVariant("release")
+        singleVariant("debug")
+    }
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
+        debug{
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
     }
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_11
@@ -32,21 +45,26 @@ dependencies {
 }
 
 
-// ------------ publish to jitpack ------------
-def GROUP_ID = "cc.rome753"
-def ARTIFACT_ID = "activitytasklib"
-def VERSION = "1.0"
-
-publishing {
-    publications {
-        register("release", MavenPublication) {
-            groupId = GROUP_ID
-            artifactId = ARTIFACT_ID
-            version = VERSION
-
-            afterEvaluate {
-                from(components["release"])
+afterEvaluate {
+    publishing {
+        publications {
+            // Creates a Maven publication called "release".
+            group = 'cc.rome753'
+            version = '1.0.0'
+            release(MavenPublication) {
+                // Applies the component for the release build variant.
+                from components.release
+                groupId = group
+                artifactId = 'activitytasklib'
+                version = version
+            }
+            debug(MavenPublication) {
+                // Applies the component for the release build variant.
+                from components.debug
+                groupId = group
+                artifactId = 'activitytasklib'
+                version = version
             }
         }
     }
-}
+}