Android: Remove CompletableFuture

We only use this class in one in one single function since its introduction with 12aa107 in 2021. If we do need it elsewhere we can always bring it back.

Author: Simonx22

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.kt

@@ -26,15 +26,15 @@ import org.dolphinemu.dolphinemu.model.GameFileCache
 import org.dolphinemu.dolphinemu.services.GameFileCacheManager
 import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner
 import org.dolphinemu.dolphinemu.utils.BooleanSupplier
-import org.dolphinemu.dolphinemu.utils.CompletableFuture
 import org.dolphinemu.dolphinemu.utils.ContentHandler
 import org.dolphinemu.dolphinemu.utils.DirectoryInitialization
 import org.dolphinemu.dolphinemu.utils.FileBrowserHelper
 import org.dolphinemu.dolphinemu.utils.PermissionsHandler
 import org.dolphinemu.dolphinemu.utils.ThreadUtil
 import org.dolphinemu.dolphinemu.utils.WiiUtils
 import java.util.Arrays
-import java.util.concurrent.ExecutionException
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.atomic.AtomicReference
 
 class MainPresenter(private val mainView: MainView, private val activity: FragmentActivity) {
     private var dirToAdd: String? = null
@@ -265,33 +265,34 @@ class MainPresenter(private val mainView: MainView, private val activity: Fragme
     }
 
     fun importWiiSave(path: String?) {
-        val canOverwriteFuture = CompletableFuture<Boolean>()
         ThreadUtil.runOnThreadAndShowResult(
             activity,
             R.string.import_in_progress,
             0,
             {
                 val canOverwrite = BooleanSupplier {
+                    val latch = CountDownLatch(1)
+                    val decision = AtomicReference<Boolean>()
                     activity.runOnUiThread {
                         MaterialAlertDialogBuilder(activity)
                             .setMessage(R.string.wii_save_exists)
                             .setCancelable(false)
                             .setPositiveButton(R.string.yes) { _: DialogInterface?, _: Int ->
-                                canOverwriteFuture.complete(true)
+                                decision.set(true)
+                                latch.countDown()
                             }
                             .setNegativeButton(R.string.no) { _: DialogInterface?, _: Int ->
-                                canOverwriteFuture.complete(false)
+                                decision.set(false)
+                                latch.countDown()
                             }
                             .show()
                     }
                     try {
-                        return@BooleanSupplier canOverwriteFuture.get()
-                    } catch (e: ExecutionException) {
-                        // Shouldn't happen
-                        throw RuntimeException(e)
+                        latch.await()
                     } catch (e: InterruptedException) {
                         throw RuntimeException(e)
                     }
+                    decision.get() ?: false
                 }
 
                 val message: Int = when (WiiUtils.importWiiSave(path!!, canOverwrite)) {