fix: ToolingServerListener is not released properly, resulting in memory leak

app/src/main/java/com/itsaky/androidide/activities/editor/ProjectHandlerActivity.kt

@@ -135,7 +135,7 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
 
   override fun preDestroy() {
     if (isDestroying) {
-
+      releaseServerListener()
       this.initializingFuture?.cancel(true)
       this.initializingFuture = null
 
@@ -254,6 +254,8 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
       }
 
     this.initializingFuture!!.whenCompleteAsync { result, error ->
+      releaseServerListener()
+
       if (result == null || error != null) {
         log.error("An error occurred initializing the project with Tooling API", error)
         setStatus(getString(string.msg_project_initialization_failed))
@@ -264,6 +266,12 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
     }
   }
 
+  private fun releaseServerListener() {
+    // Release reference to server listener in order to prevent memory leak
+    (Lookup.DEFAULT.lookup(BuildService.KEY_BUILD_SERVICE) as? GradleBuildService?)
+      ?.setServerListener(null)
+  }
+
   override fun stopLanguageServers() {
     try {
       destroyLanguageServers(isChangingConfigurations)

app/src/main/java/com/itsaky/androidide/services/builder/GradleBuildService.java

@@ -343,6 +343,12 @@ public class GradleBuildService extends Service implements BuildService, IToolin
     return gradlew.exists() && gradleWrapperJar.exists() && gradleWrapperProps.exists();
   }
 
+  public void setServerListener (@Nullable ToolingServerRunner.OnServerStartListener listener) {
+    if (this.toolingServerThread != null) {
+      this.toolingServerThread.setListener(listener);
+    }
+  }
+
   private CompletableFuture<GradleWrapperCheckResult> installWrapper() {
     if (eventListener != null) {
       eventListener.onOutput("-------------------- NOTE --------------------");
@@ -478,7 +484,7 @@ public class GradleBuildService extends Service implements BuildService, IToolin
     if (toolingServerThread.isStarted() && listener != null) {
       listener.onServerStarted();
     } else {
-      toolingServerThread.setListener(listener);
+      setServerListener(listener);
     }
   }
 

app/src/main/java/com/itsaky/androidide/services/builder/ToolingServerRunner.kt

@@ -123,8 +123,12 @@ internal class ToolingServerRunner(
 
   override fun interrupt() {
     super.interrupt()
-    listener = null
-    observer = null
+    release()
+  }
+
+  internal fun release() {
+    this.listener = null
+    this.observer = null
   }
 
   interface Observer {