feat: add basic support for handling configuration changes

actions/src/main/java/com/itsaky/androidide/actions/internal/DefaultActionsRegistry.kt

@@ -31,6 +31,7 @@ import com.itsaky.androidide.actions.locations.CodeActionsMenu
 import com.itsaky.androidide.utils.ILogger
 import com.itsaky.androidide.utils.resolveAttr
 import java.util.concurrent.CompletableFuture
+import java.util.concurrent.ConcurrentHashMap
 
 /**
  * Default implementation for the [ActionsRegistry]
@@ -40,7 +41,7 @@ import java.util.concurrent.CompletableFuture
 class DefaultActionsRegistry : ActionsRegistry() {
 
   private val log = ILogger.newInstance("DefaultActionsRegistry")
-  private val actions: MutableMap<String, MutableMap<String, ActionItem>> = mutableMapOf()
+  private val actions = ConcurrentHashMap<String, HashMap<String, ActionItem>>()
   private val listeners = mutableSetOf<ActionExecListener>()
 
   init {
@@ -49,7 +50,7 @@ class DefaultActionsRegistry : ActionsRegistry() {
 
   override fun getActions(location: ActionItem.Location): MutableMap<String, ActionItem> {
     if (actions[location.id] == null) {
-      actions[location.id] = mutableMapOf()
+      actions[location.id] = hashMapOf()
     }
 
     return actions[location.id]!!

app/src/main/AndroidManifest.xml

@@ -36,7 +36,7 @@
     </activity>
     <activity
       android:name=".activities.MainActivity"
-      android:configChanges="orientation|screenSize|uiMode"
+      android:configChanges="orientation|screenSize"
       android:exported="true"
       android:theme="@style/AppTheme.Splash">
       <intent-filter>
@@ -47,17 +47,17 @@
     <activity
       android:name=".activities.editor.EditorActivityKt"
       android:launchMode="singleTop"
-      android:configChanges="orientation|screenSize|uiMode"
+      android:configChanges="orientation|screenSize"
       android:windowSoftInputMode="adjustResize" />
     <activity
       android:name=".activities.PreferencesActivity"
       android:configChanges="orientation|screenSize" />
     <activity
       android:name=".activities.AboutActivity"
-      android:configChanges="orientation|screenSize|uiMode" />
+      android:configChanges="orientation|screenSize" />
     <activity
       android:name=".activities.TerminalActivity"
-      android:configChanges="orientation|screenSize|uiMode"
+      android:configChanges="orientation|screenSize"
       android:windowSoftInputMode="adjustResize" />
 
     <service

app/src/main/java/com/itsaky/androidide/actions/etc/FileTreeAction.kt

@@ -42,7 +42,7 @@ class FileTreeAction() : EditorActivityAction() {
   override fun execAction(data: ActionData): Boolean {
     val context = getActivity(data) ?: return false
   
-    context.binding?.root?.apply {
+    context.binding.root.apply {
       if (!isDrawerOpen(GravityCompat.END)) {
         openDrawer(GravityCompat.END)
         return true

app/src/main/java/com/itsaky/androidide/actions/file/CloseFileAction.kt

@@ -38,7 +38,7 @@ class CloseFileAction(context: Context) : FileTabAction() {
   }
 
   override fun EditorHandlerActivity.doAction(data: ActionData): Boolean {
-    binding?.tabs?.selectedTabPosition?.let { closeFile(it) }
+    binding.tabs.selectedTabPosition.let { closeFile(it) }
     return true
   }
 }

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

@@ -84,7 +84,6 @@ import com.itsaky.androidide.ui.editor.CodeEditorView
 import com.itsaky.androidide.uidesigner.UIDesignerActivity
 import com.itsaky.androidide.utils.ActionMenuUtils.createMenu
 import com.itsaky.androidide.utils.DialogUtils.newMaterialDialogBuilder
-import com.itsaky.androidide.utils.EditorActivityActions.Companion.register as registerActivityActions
 import com.itsaky.androidide.utils.ILogger
 import com.itsaky.androidide.utils.InstallationResultHandler.onResult
 import com.itsaky.androidide.utils.SingleSessionCallback
@@ -95,11 +94,12 @@ import com.itsaky.androidide.xml.versions.ApiVersionsRegistry
 import com.itsaky.androidide.xml.widgets.WidgetTableRegistry
 import com.itsaky.toaster.Toaster.Type.ERROR
 import com.itsaky.toaster.toast
-import java.io.File
-import java.util.Objects
 import org.greenrobot.eventbus.EventBus
 import org.greenrobot.eventbus.Subscribe
 import org.greenrobot.eventbus.ThreadMode.MAIN
+import java.io.File
+import java.util.Objects
+import com.itsaky.androidide.utils.EditorActivityActions.Companion.register as registerActivityActions
 
 /**
  * Base class for EditorActivity which handles most of the view related things.
@@ -119,18 +119,20 @@ abstract class BaseEditorActivity :
   protected var filesTreeFragment: FileTreeFragment? = null
   protected var editorBottomSheet: BottomSheetBehavior<out View?>? = null
   protected var isDestroying = false
+  protected var isConfigChange = false
+  protected var wasInitializing = false
+
   protected val log: ILogger = ILogger.newInstance("EditorActivity")
   protected val logReceiver: LogReceiver = LogReceiver().setLogListener(::appendApkLog)
 
   var uiDesignerResultLauncher: ActivityResultLauncher<Intent>? = null
   val viewModel by viewModels<EditorViewModel>()
-  var binding: ActivityEditorBinding? = null
+  lateinit var binding: ActivityEditorBinding
     protected set
 
   private val onBackPressedCallback: OnBackPressedCallback =
     object : OnBackPressedCallback(true) {
       override fun handleOnBackPressed() {
-        val binding = this@BaseEditorActivity.binding ?: return
         if (binding.root.isDrawerOpen(GravityCompat.END)) {
           binding.root.closeDrawer(GravityCompat.END)
         } else if (binding.root.isDrawerOpen(GravityCompat.START)) {
@@ -159,6 +161,7 @@ abstract class BaseEditorActivity :
   protected abstract fun doConfirmProjectClose()
 
   protected open fun preDestroy() {
+    viewModel.isConfigChange = !isDestroying
     try {
       unregisterReceiver(logReceiver)
     } catch (th: Throwable) {
@@ -167,28 +170,27 @@ abstract class BaseEditorActivity :
   }
 
   protected open fun postDestroy() {
-    Lookup.DEFAULT.unregisterAll()
-    ApiVersionsRegistry.getInstance().clear()
-    ResourceTableRegistry.getInstance().clear()
-    WidgetTableRegistry.getInstance().clear()
-
-    binding = null
-    binding = null
+    if (isDestroying) {
+      Lookup.DEFAULT.unregisterAll()
+      ApiVersionsRegistry.getInstance().clear()
+      ResourceTableRegistry.getInstance().clear()
+      WidgetTableRegistry.getInstance().clear()
+    }
   }
 
   override fun bindLayout(): View {
     this.binding = ActivityEditorBinding.inflate(layoutInflater)
-    this.diagnosticInfoBinding = this.binding!!.diagnosticInfo
-    return this.binding!!.root
+    this.diagnosticInfoBinding = this.binding.diagnosticInfo
+    return this.binding.root
   }
 
   @Subscribe(threadMode = MAIN)
   open fun onInstallationResult(event: InstallationResultEvent) {
     val intent = event.intent
-    if (binding == null || isDestroying) {
+    if (isDestroying) {
       return
     }
-    val binding = this.binding ?: return
+
     val packageName = onResult(this, intent)
     if (packageName != null) {
       Snackbar.make(binding.realContainer, string.msg_action_open_application, Snackbar.LENGTH_LONG)
@@ -209,15 +211,20 @@ abstract class BaseEditorActivity :
       projectPath = savedInstanceState.getString(KEY_PROJECT_PATH)!!
     }
 
+    this.wasInitializing = viewModel.isInitializing
+    this.isConfigChange = viewModel.isConfigChange
+    viewModel.isConfigChange = false
+    viewModel.isInitializing = false
+
     onBackPressedDispatcher.addCallback(this, onBackPressedCallback)
     lifecycle.addObserver(mLifecycleObserver)
 
-    setSupportActionBar(binding?.editorToolbar)
+    setSupportActionBar(binding.editorToolbar)
 
     dmonStatusFragment = getDaemonStatusFragment()
 
     setupDrawerToggle()
-    binding?.tabs?.addOnTabSelectedListener(this)
+    binding.tabs.addOnTabSelectedListener(this)
 
     setupViews()
 
@@ -289,7 +296,7 @@ abstract class BaseEditorActivity :
       id.editornav_terminal -> openTerminal()
     }
 
-    binding?.root?.closeDrawer(GravityCompat.START)
+    binding.root.closeDrawer(GravityCompat.START)
     return false
   }
 
@@ -324,7 +331,7 @@ abstract class BaseEditorActivity :
   }
 
   open fun appendApkLog(line: LogLine) {
-    binding?.bottomSheet?.appendApkLog(line)
+    binding.bottomSheet.appendApkLog(line)
   }
 
   open fun handleSearchResults(map: Map<File, List<SearchResult>>?) {
@@ -347,11 +354,11 @@ abstract class BaseEditorActivity :
   }
 
   open fun setSearchResultAdapter(adapter: SearchListAdapter) {
-    binding?.bottomSheet?.setSearchResultAdapter(adapter)
+    binding.bottomSheet.setSearchResultAdapter(adapter)
   }
 
   open fun setDiagnosticsAdapter(adapter: DiagnosticsAdapter) {
-    binding?.bottomSheet?.setDiagnosticsAdapter(adapter)
+    binding.bottomSheet.setDiagnosticsAdapter(adapter)
   }
 
   open fun showDaemonStatus() {
@@ -387,23 +394,19 @@ abstract class BaseEditorActivity :
     }
 
     val index =
-      binding
-        ?.bottomSheet
-        ?.pagerAdapter
-        ?.findIndexOfFragmentByClass(SearchResultFragment::class.java)
-        ?: -1
+      binding.bottomSheet.pagerAdapter.findIndexOfFragmentByClass(SearchResultFragment::class.java)
 
-    if (index >= 0 && index < (binding?.bottomSheet?.binding?.tabs?.tabCount ?: 0)) {
-      binding?.bottomSheet?.binding?.tabs?.getTabAt(index)?.select()
+    if (index >= 0 && index < binding.bottomSheet.binding.tabs.tabCount) {
+      binding.bottomSheet.binding.tabs.getTabAt(index)?.select()
     }
   }
 
   open fun handleDiagnosticsResultVisibility(errorVisible: Boolean) {
-    binding?.bottomSheet?.handleDiagnosticsResultVisibility(errorVisible)
+    binding.bottomSheet.handleDiagnosticsResultVisibility(errorVisible)
   }
 
   open fun handleSearchResultVisibility(errorVisible: Boolean) {
-    binding?.bottomSheet?.handleSearchResultVisibility(errorVisible)
+    binding.bottomSheet.handleSearchResultVisibility(errorVisible)
   }
 
   open fun showFirstBuildNotice() {
@@ -461,7 +464,6 @@ abstract class BaseEditorActivity :
   }
 
   private fun setupDrawerToggle() {
-    val binding = this.binding ?: return
     val toggle =
       ActionBarDrawerToggle(
         this,
@@ -479,23 +481,17 @@ abstract class BaseEditorActivity :
 
   private fun onBuildStatusChanged() {
     val visible = viewModel.isBuildInProgress || viewModel.isInitializing
-    binding?.buildProgressIndicator?.visibility = if (visible) View.VISIBLE else View.GONE
+    binding.buildProgressIndicator.visibility = if (visible) View.VISIBLE else View.GONE
     invalidateOptionsMenu()
   }
 
   private fun setupViews() {
     viewModel._isBuildInProgress.observe(this) { onBuildStatusChanged() }
     viewModel._isInitializing.observe(this) { onBuildStatusChanged() }
-    viewModel._statusText.observe(this) {
-      binding?.bottomSheet?.setStatus(it.first, it.second)
-    }
+    viewModel._statusText.observe(this) { binding.bottomSheet.setStatus(it.first, it.second) }
 
     viewModel.observeFiles(this) { files ->
-      if (binding == null) {
-        return@observeFiles
-      }
-
-      binding?.apply {
+      binding.apply {
         if (files == null || files.isEmpty()) {
           tabs.visibility = View.GONE
           viewContainer.displayedChild = 1
@@ -525,11 +521,11 @@ abstract class BaseEditorActivity :
   }
 
   private fun setupNoEditorView() {
-    binding?.noEditorSummary?.movementMethod = LinkMovementMethod()
+    binding.noEditorSummary.movementMethod = LinkMovementMethod()
     val filesSpan: ClickableSpan =
       object : ClickableSpan() {
         override fun onClick(widget: View) {
-          binding?.root?.openDrawer(GravityCompat.END)
+          binding.root.openDrawer(GravityCompat.END)
         }
       }
     val bottomSheetSpan: ClickableSpan =
@@ -541,7 +537,7 @@ abstract class BaseEditorActivity :
     val sb = SpannableStringBuilder()
     appendClickableSpan(sb, string.msg_swipe_for_files, filesSpan)
     appendClickableSpan(sb, string.msg_swipe_for_output, bottomSheetSpan)
-    binding?.noEditorSummary?.text = sb
+    binding.noEditorSummary.text = sb
   }
 
   private fun appendClickableSpan(
@@ -564,7 +560,7 @@ abstract class BaseEditorActivity :
   }
 
   private fun setupBottomSheet() {
-    editorBottomSheet = BottomSheetBehavior.from<View>(binding!!.bottomSheet)
+    editorBottomSheet = BottomSheetBehavior.from<View>(binding.bottomSheet)
     editorBottomSheet?.addBottomSheetCallback(
       object : BottomSheetCallback() {
         override fun onStateChanged(bottomSheet: View, newState: Int) {
@@ -577,7 +573,7 @@ abstract class BaseEditorActivity :
         }
 
         override fun onSlide(bottomSheet: View, slideOffset: Float) {
-          binding?.apply {
+          binding.apply {
             val editorScale = 1 - slideOffset * (1 - EDITOR_CONTAINER_SCALE_FACTOR)
             this.bottomSheet.onSlide(slideOffset)
             this.viewContainer.scaleX = editorScale
@@ -590,7 +586,7 @@ abstract class BaseEditorActivity :
     val observer: OnGlobalLayoutListener =
       object : OnGlobalLayoutListener {
         override fun onGlobalLayout() {
-          binding?.let {
+          binding.let {
             it.viewContainer.pivotY = 0f
             it.viewContainer.pivotX = it.viewContainer.width / 2f
             it.viewContainer.viewTreeObserver.removeOnGlobalLayoutListener(this)
@@ -598,14 +594,14 @@ abstract class BaseEditorActivity :
         }
       }
 
-    binding?.apply {
+    binding.apply {
       viewContainer.viewTreeObserver.addOnGlobalLayoutListener(observer)
       bottomSheet.setOffsetAnchor(editorToolbar)
     }
   }
 
   private fun refreshSymbolInput(editor: CodeEditorView) {
-    binding?.bottomSheet?.refreshSymbolInput(editor)
+    binding.bottomSheet.refreshSymbolInput(editor)
   }
 
   private fun setupDiagnosticInfo() {
@@ -625,7 +621,7 @@ abstract class BaseEditorActivity :
 
   private fun onSoftInputChanged() {
     invalidateOptionsMenu()
-    binding?.bottomSheet?.onSoftInputChanged()
+    binding.bottomSheet.onSoftInputChanged()
   }
 
   private fun openTerminal() {
@@ -652,7 +648,7 @@ abstract class BaseEditorActivity :
   }
 
   private fun getSyncBanner(): MaterialBanner? {
-    return binding?.run {
+    return binding.run {
       return@run syncBanner
         .setContentTextColor(resolveAttr(attr.colorOnPrimaryContainer))
         .setBannerBackgroundColor(resolveAttr(attr.colorPrimaryContainer))
@@ -666,7 +662,7 @@ abstract class BaseEditorActivity :
     return object : SingleSessionCallback() {
       override fun onCreated(sessionId: Int) {
         log.debug("on session created:", sessionId)
-        binding?.apply {
+        binding.apply {
           bottomSheet.setActionText(getString(string.msg_installing_apk))
           bottomSheet.setActionProgress(0)
           bottomSheet.showChild(EditorBottomSheet.CHILD_ACTION)
@@ -674,11 +670,11 @@ abstract class BaseEditorActivity :
       }
 
       override fun onProgressChanged(sessionId: Int, progress: Float) {
-        binding?.bottomSheet?.setActionProgress((progress * 100f).toInt())
+        binding.bottomSheet.setActionProgress((progress * 100f).toInt())
       }
 
       override fun onFinished(sessionId: Int, success: Boolean) {
-        binding?.apply {
+        binding.apply {
           bottomSheet.showChild(EditorBottomSheet.CHILD_HEADER)
           bottomSheet.setActionProgress(0)
           if (!success) {

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

@@ -51,43 +51,47 @@ import java.io.File
  * @author Akash Yadav
  */
 open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
-  
+
   override fun doOpenFile(file: File, selection: Range?) {
     openFileAndSelect(file, selection)
   }
-  
+
   override fun doCloseAll(runAfter: () -> Unit) {
     closeAll(runAfter)
   }
-  
+
   override fun doSaveAll(): Boolean {
     return saveAll()
   }
-  
+
   override fun provideCurrentEditor(): CodeEditorView? {
     return getCurrentEditor()
   }
-  
+
   override fun provideEditorAt(index: Int): CodeEditorView? {
     return getEditorAtIndex(index)
   }
-  
+
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
 
-    viewModel._displayedFile.observe(this) { this.binding?.editorContainer?.displayedChild = it }
+    viewModel._displayedFile.observe(this) { this.binding.editorContainer.displayedChild = it }
     viewModel._fileTreeDrawerOpened.observe(this) { opened ->
-      this.binding?.editorDrawerLayout?.apply {
+      this.binding.editorDrawerLayout.apply {
         if (opened) openDrawer(GravityCompat.END) else closeDrawer(GravityCompat.END)
       }
     }
+
+    if (viewModel.getOpenedFileCount() != binding.tabs.tabCount) {
+      // The activity proabably has been restarted after a configuration change
+      // restore the opened files
+
+      val files = viewModel.getOpenedFiles()
+      viewModel.removeAllFiles()
+      files.forEach(this::openFile)
+    }
   }
 
-  override fun onDestroy() {
-    super.onDestroy()
-    binding = null
-  }
-  
   @SuppressLint("RestrictedApi")
   override fun onCreateOptionsMenu(menu: Menu?): Boolean {
     if (menu is MenuBuilder) {
@@ -95,7 +99,7 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
     }
     return true
   }
-  
+
   override fun onPrepareOptionsMenu(menu: Menu): Boolean {
     ensureToolbarMenu(menu)
     return true
@@ -108,7 +112,7 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
   }
 
   override fun getEditorAtIndex(index: Int): CodeEditorView? {
-    return binding?.editorContainer?.getChildAt(index) as CodeEditorView?
+    return binding.editorContainer.getChildAt(index) as CodeEditorView?
   }
 
   override fun openFileAndSelect(file: File, selection: Range?) {
@@ -134,7 +138,6 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
       return null
     }
 
-    val binding = this.binding ?: return null
     val index = openFileAndGetIndex(file, range)
     val tab = binding.tabs.getTabAt(index)
     if (tab != null && index >= 0 && !tab.isSelected) {
@@ -154,7 +157,6 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
   }
 
   override fun openFileAndGetIndex(file: File, selection: Range?): Int {
-    val binding = this.binding ?: return -1
     val openedFileIndex = findIndexOfEditorByFile(file)
     if (openedFileIndex != -1) {
       log.error("File is already opened. File: $file")
@@ -181,7 +183,6 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
   }
 
   override fun getEditorForFile(file: File): CodeEditorView? {
-    val binding = this.binding ?: return null
     for (i in 0 until viewModel.getOpenedFileCount()) {
       val editor = binding.editorContainer.getChildAt(i) as CodeEditorView
       if (file == editor.file) {
@@ -302,7 +303,7 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
       }
 
       viewModel.removeFile(index)
-      binding?.apply {
+      binding.apply {
         tabs.removeTabAt(index)
         editorContainer.removeViewAt(index)
       }
@@ -311,7 +312,7 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
       return
     }
 
-    binding?.tabs?.requestLayout()
+    binding.tabs.requestLayout()
   }
 
   override fun closeAll() {
@@ -341,7 +342,7 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
       notifyFilesUnsaved(unsavedFiles) { closeOthers() }
     }
   }
-  
+
   open fun ensureToolbarMenu(menu: Menu) {
     menu.clear()
     val data = ActionData()
@@ -377,7 +378,7 @@ open class EditorHandlerActivity : ProjectHandlerActivity(), IEditorHandler {
     }
 
     viewModel.removeAllFiles()
-    binding?.apply {
+    binding.apply {
       tabs.removeAllTabs()
       tabs.requestLayout()
       editorContainer.removeAllViews()

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

@@ -33,14 +33,16 @@ import com.itsaky.androidide.databinding.LayoutSearchProjectBinding
 import com.itsaky.androidide.fragments.sheets.ProgressSheet
 import com.itsaky.androidide.handlers.EditorBuildEventListener
 import com.itsaky.androidide.handlers.LspHandler.connectClient
-import com.itsaky.androidide.handlers.LspHandler.destroy
+import com.itsaky.androidide.handlers.LspHandler.destroyLanguageServers
 import com.itsaky.androidide.interfaces.IProjectHandler
 import com.itsaky.androidide.lookup.Lookup
 import com.itsaky.androidide.lsp.IDELanguageClientImpl
 import com.itsaky.androidide.preferences.internal.NO_OPENED_PROJECT
 import com.itsaky.androidide.preferences.internal.lastOpenedProject
+import com.itsaky.androidide.projects.ProjectManager.cachedInitResult
 import com.itsaky.androidide.projects.ProjectManager.getProjectDirPath
 import com.itsaky.androidide.projects.ProjectManager.notifyProjectUpdate
+import com.itsaky.androidide.projects.ProjectManager.projectInitialized
 import com.itsaky.androidide.projects.ProjectManager.projectPath
 import com.itsaky.androidide.projects.ProjectManager.rootProject
 import com.itsaky.androidide.projects.ProjectManager.setupProject
@@ -54,16 +56,17 @@ import com.itsaky.androidide.utils.RecursiveFileSearcher
 import com.itsaky.toaster.Toaster.Type.ERROR
 import com.itsaky.toaster.toast
 import java.io.File
+import java.util.concurrent.CompletableFuture
 import java.util.regex.Pattern
 import java.util.stream.Collectors
 
 /** @author Akash Yadav */
 @Suppress("MemberVisibilityCanBePrivate")
 abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
-  
+
   protected var mSearchingProgress: ProgressSheet? = null
   protected var mFindInProjectDialog: AlertDialog? = null
-  
+
   val findInProjectDialog: AlertDialog
     get() {
       if (mFindInProjectDialog == null) {
@@ -71,47 +74,57 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
       }
       return mFindInProjectDialog!!
     }
-  
+
   protected val mBuildEventListener = EditorBuildEventListener()
   private val mGradleServiceConnection: ServiceConnection =
     object : ServiceConnection {
       override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
         val buildService = (service as GradleServiceBinder).service
-        log.info("Gradle build service has been started...")
-        Lookup.DEFAULT.update(BuildService.KEY_BUILD_SERVICE, buildService)
-        buildService.setEventListener(mBuildEventListener).startToolingServer {
-          initializeProject()
-        }
+        onGradleBuildServiceConnected(buildService)
       }
 
       override fun onServiceDisconnected(name: ComponentName?) {
-        log.info("Disconnected from Gradle build service...")
+        log.info("Disconnected from Gradle build service")
       }
     }
-  
+
   abstract fun doCloseAll(runAfter: () -> Unit)
-  
+
   override fun doDismissSearchProgress() {
     if (mSearchingProgress?.isShowing == true) {
       mSearchingProgress!!.dismiss()
     }
   }
-  
+
   override fun doConfirmProjectClose() {
     confirmProjectClose()
   }
 
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
-    
+
     mBuildEventListener.setActivity(this as EditorHandlerActivity)
     startServices()
   }
-  
+
   override fun preDestroy() {
-    closeProject(false)
+    if (isDestroying) {
+      closeProject(false)
+      projectInitialized = false
+      cachedInitResult = null
+    }
+
     super.preDestroy()
-    unbindService(mGradleServiceConnection)
+
+    if (isDestroying) {
+      try {
+        app.unbindService(mGradleServiceConnection)
+      } catch (err: Throwable) {
+        log.error("Unable to unbind service", err)
+      } finally {
+        Lookup.DEFAULT.unregister(BuildService.KEY_BUILD_SERVICE)
+      }
+    }
   }
 
   override fun setStatus(status: CharSequence, @GravityInt gravity: Int) {
@@ -119,7 +132,7 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
   }
 
   override fun appendBuildOutput(str: String) {
-    binding?.bottomSheet?.appendBuildOut(str)
+    binding.bottomSheet.appendBuildOut(str)
   }
 
   override fun notifySyncNeeded() {
@@ -127,11 +140,19 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
   }
 
   override fun startServices() {
+
+    val service = Lookup.DEFAULT.lookup(BuildService.KEY_BUILD_SERVICE) as GradleBuildService?
+    if (service != null) {
+      log.info("Reusing already started Gradle build service")
+      onGradleBuildServiceConnected(service)
+      return
+    }
+
     if (
-      bindService(
+      app.bindService(
         Intent(this, GradleBuildService::class.java),
         mGradleServiceConnection,
-        BIND_AUTO_CREATE
+        BIND_AUTO_CREATE or BIND_IMPORTANT
       )
     ) {
       log.info("Bind request for Gradle build service was successful...")
@@ -143,13 +164,22 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
   }
 
   override fun initializeProject() {
-    val projectPath = projectPath
     val projectDir = File(projectPath)
     if (!projectDir.exists()) {
       log.error("Project directory does not exist. Cannot initialize project")
       return
     }
-
+    
+    val initialized = projectInitialized && cachedInitResult != null
+    
+    log.debug(projectInitialized, cachedInitResult, wasInitializing)
+    
+    // When returning after a configuration change between the initialization process,
+    // we do not want to start another project initialization
+    if (initialized && !wasInitializing) {
+      return
+    }
+    
     //noinspection ConstantConditions
     ThreadUtils.runOnUiThread { preProjectInit() }
 
@@ -158,16 +188,27 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
       log.error("No build service found. Cannot initialize project.")
       return
     }
+    
+    val future =
+      if (!(isConfigChange && wasInitializing) && !initialized) {
+        buildService.initializeProject(projectDir.absolutePath)
+      } else {
+        // The project initialization was in progress before the configuration change
+        // In this case, we should not start another project initialization
+        CompletableFuture.supplyAsync {
+          log.warn("Project has already been initialized. Skipping initialization process.")
+          cachedInitResult
+        }
+      }
 
-    val future = buildService.initializeProject(projectDir.absolutePath)
-    future.whenCompleteAsync { result: InitializeResult?, error: Throwable? ->
+    future.whenCompleteAsync { result, error ->
       if (result == null || error != null) {
         log.error("An error occurred initializing the project with Tooling API", error)
         setStatus(getString(string.msg_project_initialization_failed))
         return@whenCompleteAsync
       }
-
-      onProjectInitialized()
+      
+      onProjectInitialized(result)
     }
   }
 
@@ -176,86 +217,100 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
       if (IDELanguageClientImpl.isInitialized()) {
         IDELanguageClientImpl.shutdown()
       }
-      destroy(isChangingConfigurations)
+      destroyLanguageServers(isChangingConfigurations)
     } catch (err: Throwable) {
       log.error("Unable to stop editor services. Please report this issue.", err)
     }
   }
   
-  protected open fun onProjectInitialized() {
+  protected fun onGradleBuildServiceConnected(service: GradleBuildService) {
+    log.info("Connected to Gradle build service")
+    
+    service.setEventListener(mBuildEventListener)
+    
+    if (!service.isToolingServerStarted) {
+      service.startToolingServer { initializeProject() }
+    } else {
+      initializeProject()
+    }
+  }
+
+  protected open fun onProjectInitialized(result: InitializeResult) {
+    if (isConfigChange && projectInitialized && result == cachedInitResult) {
+      return
+    }
+
+    cachedInitResult = result
     setupProject()
     notifyProjectUpdate()
     ThreadUtils.runOnUiThread { postProjectInit() }
   }
-  
+
   protected open fun postProjectInit() {
-    this.binding ?: return
     initialSetup()
     setStatus(getString(string.msg_project_initialized))
     viewModel.isInitializing = false
-    
+    projectInitialized = true
+
     if (mFindInProjectDialog?.isShowing == true) {
       mFindInProjectDialog!!.dismiss()
     }
-    
+
     mFindInProjectDialog = null // Create the dialog again if needed
   }
-  
+
   protected open fun createFindInProjectDialog(): AlertDialog? {
     if (rootProject == null) {
       log.warn("No root project model found. Is the project initialized?")
       toast(getString(string.msg_project_not_initialized), ERROR)
       return null
     }
-    
-    val moduleDirs = try {
-      rootProject!!.subModules.stream()
-        .map(Project::projectDir)
-        .collect(Collectors.toList())
-    } catch (e: Throwable) {
-      toast(getString(string.msg_no_modules), ERROR)
-      emptyList()
-    }
-    
+
+    val moduleDirs =
+      try {
+        rootProject!!.subModules.stream().map(Project::projectDir).collect(Collectors.toList())
+      } catch (e: Throwable) {
+        toast(getString(string.msg_no_modules), ERROR)
+        emptyList()
+      }
+
     return createFindInProjectDialog(moduleDirs)
   }
-  
+
   protected open fun createFindInProjectDialog(moduleDirs: List<File>): AlertDialog? {
     val srcDirs = mutableListOf<File>()
     val binding = LayoutSearchProjectBinding.inflate(layoutInflater)
     binding.modulesContainer.removeAllViews()
-    
+
     for (i in moduleDirs.indices) {
       val module = moduleDirs[i]
       val src = File(module, "src")
-      
+
       if (!module.exists() || !module.isDirectory || !src.exists() || !src.isDirectory) {
         continue
       }
-      
+
       val check = CheckBox(this)
       check.text = module.name
       check.isChecked = true
-      
+
       val params = MarginLayoutParams(-2, -2)
       params.bottomMargin = SizeUtils.dp2px(4f)
       binding.modulesContainer.addView(check, params)
       srcDirs.add(src)
     }
-    
+
     val builder = newMaterialDialogBuilder(this)
     builder.setTitle(string.menu_find_project)
     builder.setView(binding.root)
     builder.setCancelable(false)
-    builder.setPositiveButton(
-      string.menu_find
-    ) { dialog, _ ->
+    builder.setPositiveButton(string.menu_find) { dialog, _ ->
       val text = binding.input.editText!!.text.toString().trim()
       if (text.isEmpty()) {
         toast(string.msg_empty_search_query, ERROR)
         return@setPositiveButton
       }
-      
+
       val searchDirs = mutableListOf<File>()
       for (i in 0 until binding.modulesContainer.childCount) {
         val check = binding.modulesContainer.getChildAt(i) as CheckBox
@@ -263,12 +318,16 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
           searchDirs.add(srcDirs[i])
         }
       }
-      
+
       val extensions = binding.filter.editText!!.text.toString().trim()
       val extensionList = mutableListOf<String>()
       if (extensions.isNotEmpty()) {
         if (extensions.contains("|")) {
-          for (str in extensions.split(Pattern.quote("|").toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()) {
+          for (str in
+            extensions
+              .split(Pattern.quote("|").toRegex())
+              .dropLastWhile { it.isEmpty() }
+              .toTypedArray()) {
             if (str.trim().isEmpty()) {
               continue
             }
@@ -278,26 +337,27 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
           extensionList.add(extensions)
         }
       }
-      
+
       if (searchDirs.isEmpty()) {
         toast(string.msg_select_search_modules, ERROR)
       } else {
         dialog.dismiss()
-        
+
         getProgressSheet(string.msg_searching_project)?.apply {
           show(supportFragmentManager, "search_in_project_progress")
         }
-        
-        RecursiveFileSearcher.searchRecursiveAsync(
-          text, extensionList, searchDirs) { results -> handleSearchResults(results) }
+
+        RecursiveFileSearcher.searchRecursiveAsync(text, extensionList, searchDirs) { results ->
+          handleSearchResults(results)
+        }
       }
     }
-    
+
     builder.setNegativeButton(android.R.string.cancel) { dialog, _ -> dialog.dismiss() }
     mFindInProjectDialog = builder.create()
     return mFindInProjectDialog
   }
-  
+
   private fun initialSetup() {
     lastOpenedProject = getProjectDirPath()
     try {
@@ -306,21 +366,21 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
         log.warn("Project not initialized. Skipping initial setup...")
         return
       }
-      
+
       var projectName = rootProject.name
       if (projectName.isEmpty()) {
         projectName = File(getProjectDirPath()).name
       }
-  
+
       supportActionBar!!.subtitle = projectName
     } catch (th: Throwable) {
       // ignored
     }
   }
-  
+
   private fun closeProject(manualFinish: Boolean) {
     stopServices()
-    
+
     // Make sure we close files
     // This will make sure that file contents are not erased.
     doCloseAll {
@@ -330,42 +390,41 @@ abstract class ProjectHandlerActivity : BaseEditorActivity(), IProjectHandler {
       }
     }
   }
-  
+
   private fun confirmProjectClose() {
     val builder = newMaterialDialogBuilder(this)
     builder.setTitle(string.title_confirm_project_close)
     builder.setMessage(string.msg_confirm_project_close)
     builder.setNegativeButton(string.no, null)
-    builder.setPositiveButton(
-      string.yes
-    ) { dialog, _ ->
+    builder.setPositiveButton(string.yes) { dialog, _ ->
       dialog.dismiss()
       closeProject(true)
     }
     builder.show()
   }
-  
+
   private fun initLspClient() {
     if (!IDELanguageClientImpl.isInitialized()) {
       IDELanguageClientImpl.initialize(this as EditorHandlerActivity)
     }
     connectClient(IDELanguageClientImpl.getInstance())
   }
-  
+
   private fun preProjectInit() {
     setStatus(getString(string.msg_initializing_project))
     viewModel.isInitializing = true
   }
-  
+
   open fun getProgressSheet(msg: Int): ProgressSheet? {
     doDismissSearchProgress()
-    
-    mSearchingProgress = ProgressSheet().apply {
-      isCancelable = false
-      setMessage(getString(msg))
-      setSubMessageEnabled(false)
-    }
-    
+
+    mSearchingProgress =
+      ProgressSheet().apply {
+        isCancelable = false
+        setMessage(getString(msg))
+        setSubMessageEnabled(false)
+      }
+
     return mSearchingProgress
   }
 }

app/src/main/java/com/itsaky/androidide/app/IDEApplication.java

@@ -38,7 +38,7 @@ public class IDEApplication extends BaseApplication {
   private static final ILogger LOG = ILogger.newInstance("IDEApplication");
   private static IDEApplication instance;
   private Thread.UncaughtExceptionHandler uncaughtExceptionHandler;
-
+  
   public static IDEApplication getInstance() {
     return instance;
   }
@@ -49,7 +49,7 @@ public class IDEApplication extends BaseApplication {
     this.uncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();
     Thread.setDefaultUncaughtExceptionHandler(this::handleCrash);
     super.onCreate();
-
+    
     EventBus.builder()
         .addIndex(new AppEventsIndex())
         .addIndex(new ProjectsApiEventsIndex())

app/src/main/java/com/itsaky/androidide/handlers/EditorBuildEventListener.kt

@@ -37,6 +37,9 @@ class EditorBuildEventListener : GradleBuildService.EventListener {
   fun setActivity(activity: EditorHandlerActivity) {
     this.activityReference = WeakReference(activity)
   }
+  
+  fun releaes() {
+  }
 
   override fun prepareBuild() {
     val isFirstBuild = isFirstBuild

app/src/main/java/com/itsaky/androidide/handlers/FileTreeActionHandler.kt

@@ -103,7 +103,7 @@ class FileTreeActionHandler : BaseEventHandler() {
     }
 
     val context = event[Context::class.java]!! as EditorHandlerActivity
-    context.binding?.root?.closeDrawer(GravityCompat.END)
+    context.binding.root.closeDrawer(GravityCompat.END)
     if (event.file.name.endsWith(".apk")) {
       ApkInstaller.installApk(
         context,

app/src/main/java/com/itsaky/androidide/handlers/LspHandler.kt

@@ -39,7 +39,7 @@ object LspHandler {
     ILanguageServerRegistry.getDefault().connectClient(client)
   }
 
-  fun destroy(isConfigurationChange: Boolean) {
+  fun destroyLanguageServers(isConfigurationChange: Boolean) {
     if (isConfigurationChange) {
       return
     }

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

@@ -37,6 +37,7 @@ import android.content.Intent;
 import android.os.Binder;
 import android.os.IBinder;
 import android.text.TextUtils;
+import android.util.Log;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -96,7 +97,7 @@ public class GradleBuildService extends Service implements BuildService, IToolin
   private final IBinder mBinder = new GradleServiceBinder();
   private boolean isToolingServerStarted = false;
   private boolean isBuildInProgress = false;
-  private Thread toolingServerThread;
+  private ToolingServerRunner toolingServerThread;
   private NotificationManager notificationManager;
   private IToolingApiServer server;
   private EventListener eventListener;
@@ -105,8 +106,14 @@ public class GradleBuildService extends Service implements BuildService, IToolin
   public void onCreate() {
     notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
     showNotification(getString(R.string.build_status_idle), false);
+  
+    Lookup.DEFAULT.update(BuildService.KEY_BUILD_SERVICE, this);
   }
-
+  
+  public boolean isToolingServerStarted() {
+    return isToolingServerStarted;
+  }
+  
   private void showNotification(final String message, final boolean isProgress) {
     LOG.info("Showing notification to user...");
     startForeground(NOTIFICATION_ID, buildNotification(message, isProgress));
@@ -163,6 +170,7 @@ public class GradleBuildService extends Service implements BuildService, IToolin
   @Nullable
   @Override
   public IBinder onBind(Intent intent) {
+    LOG.debug("onBind() called with: intent = [" + intent + "]");
     return mBinder;
   }
 
@@ -397,8 +405,15 @@ public class GradleBuildService extends Service implements BuildService, IToolin
 
   public void startToolingServer(@Nullable OnServerStartListener listener) {
     if (toolingServerThread == null || !toolingServerThread.isAlive()) {
-      toolingServerThread = new Thread(new ToolingServerRunner(listener));
+      toolingServerThread = new ToolingServerRunner(listener);
       toolingServerThread.start();
+      return;
+    }
+    
+    if (toolingServerThread.isStarted && listener != null) {
+      listener.onServerStarted();
+    } else {
+      toolingServerThread.setListener(listener);
     }
   }
 
@@ -465,14 +480,19 @@ public class GradleBuildService extends Service implements BuildService, IToolin
     }
   }
 
-  private class ToolingServerRunner implements Runnable {
+  private class ToolingServerRunner extends Thread {
 
-    @Nullable private final OnServerStartListener listener;
+    @Nullable private OnServerStartListener listener;
+    private boolean isStarted = false;
 
     public ToolingServerRunner(@Nullable OnServerStartListener listener) {
       this.listener = listener;
     }
-
+  
+    public void setListener(@Nullable final OnServerStartListener listener) {
+      this.listener = listener;
+    }
+  
     @Override
     public void run() {
       try {
@@ -525,6 +545,7 @@ public class GradleBuildService extends Service implements BuildService, IToolin
 
         ProjectManager.INSTANCE.setupProject();
 
+        isStarted = true;
         if (listener != null) {
           listener.onServerStarted();
         }

app/src/main/java/com/itsaky/androidide/utils/EditorActivityActions.kt

@@ -18,6 +18,9 @@ package com.itsaky.androidide.utils
 
 import android.content.Context
 import com.itsaky.androidide.actions.ActionItem
+import com.itsaky.androidide.actions.ActionItem.Location.EDITOR_FILE_TABS
+import com.itsaky.androidide.actions.ActionItem.Location.EDITOR_TEXT_ACTIONS
+import com.itsaky.androidide.actions.ActionItem.Location.EDITOR_TOOLBAR
 import com.itsaky.androidide.actions.ActionsRegistry
 import com.itsaky.androidide.actions.build.CancelBuildAction
 import com.itsaky.androidide.actions.build.ProjectSyncAction
@@ -79,6 +82,10 @@ class EditorActivityActions {
     }
 
     @JvmStatic
-    fun clear() = ActionsRegistry.getInstance().clearActions(ActionItem.Location.EDITOR_TOOLBAR)
+    fun clear() {
+      val locations = arrayOf(EDITOR_TOOLBAR, EDITOR_FILE_TABS, EDITOR_TEXT_ACTIONS)
+      val registry = ActionsRegistry.getInstance()
+      locations.forEach(registry::clearActions)
+    }
   }
 }

app/src/main/java/com/itsaky/androidide/viewmodel/EditorViewModel.kt

@@ -30,6 +30,7 @@ class EditorViewModel : ViewModel() {
 
   internal val _isBuildInProgress = MutableLiveData(false)
   internal val _isInitializing = MutableLiveData(false)
+  internal val _isConfigurationChange = MutableLiveData(false)
   internal val _statusText = MutableLiveData<Pair<CharSequence, @GravityInt Int>>("" to CENTER)
   internal val _displayedFile = MutableLiveData(-1)
   internal val _fileTreeDrawerOpened = MutableLiveData(false)
@@ -42,6 +43,12 @@ class EditorViewModel : ViewModel() {
    */
   private val mCurrentFile = MutableLiveData<Pair<Int, File?>?>(null)
 
+  var isConfigChange: Boolean
+    get() = _isConfigurationChange.value ?: false
+    set(value) {
+      _isConfigurationChange.value = value
+    }
+  
   var isBuildInProgress: Boolean
     get() = _isBuildInProgress.value ?: false
     set(value) {

build-tools/projects/src/main/java/com/itsaky/androidide/projects/ProjectManager.kt

@@ -30,6 +30,7 @@ import com.itsaky.androidide.projects.api.Project
 import com.itsaky.androidide.projects.builder.BuildService
 import com.itsaky.androidide.projects.util.ProjectTransformer
 import com.itsaky.androidide.tooling.api.IProject
+import com.itsaky.androidide.tooling.api.messages.result.InitializeResult
 import com.itsaky.androidide.utils.ILogger
 import org.greenrobot.eventbus.EventBus
 import org.greenrobot.eventbus.Subscribe
@@ -52,6 +53,9 @@ object ProjectManager : EventReceiver {
 
   var rootProject: Project? = null
   var app: AndroidModule? = null
+  
+  var projectInitialized: Boolean = false
+  var cachedInitResult: InitializeResult? = null
 
   @JvmOverloads
   fun setupProject(project: IProject = Lookup.DEFAULT.lookup(BuildService.KEY_PROJECT_PROXY)!!) {
@@ -61,7 +65,6 @@ object ProjectManager : EventReceiver {
       this.app = this.rootProject!!.findFirstAndroidAppModule()
       this.rootProject!!.subModules.filterIsInstance(ModuleProject::class.java).forEach {
         it.indexSourcesAndClasspaths()
-
         if (it is AndroidModule) {
           it.readResources()
         }

uidesigner/src/main/AndroidManifest.xml

@@ -20,6 +20,7 @@
   <application android:theme="@style/Theme.AndroidIDE">
     <activity
       android:name=".UIDesignerActivity"
+      android:configChanges="orientation|screenSize"
       android:windowSoftInputMode="adjustResize" />
     <activity
       android:name=".ShowXmlActivity"