android: Convert MainPresenter to Kotlin

src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainPresenter.java

@@ -1,81 +0,0 @@
-package org.yuzu.yuzu_emu.ui.main;
-
-import android.os.SystemClock;
-
-import org.yuzu.yuzu_emu.BuildConfig;
-import org.yuzu.yuzu_emu.YuzuApplication;
-import org.yuzu.yuzu_emu.R;
-import org.yuzu.yuzu_emu.features.settings.utils.SettingsFile;
-import org.yuzu.yuzu_emu.model.GameDatabase;
-import org.yuzu.yuzu_emu.utils.AddDirectoryHelper;
-
-public final class MainPresenter {
-    public static final int REQUEST_ADD_DIRECTORY = 1;
-    public static final int REQUEST_INSTALL_KEYS = 2;
-    public static final int REQUEST_SELECT_GPU_DRIVER = 3;
-    private final MainView mView;
-    private String mDirToAdd;
-    private long mLastClickTime = 0;
-
-    public MainPresenter(MainView view) {
-        mView = view;
-    }
-
-    public void onCreate() {
-        String versionName = BuildConfig.VERSION_NAME;
-        mView.setVersionString(versionName);
-        refreshGameList();
-    }
-
-    public void launchFileListActivity(int request) {
-        if (mView != null) {
-            mView.launchFileListActivity(request);
-        }
-    }
-
-    public boolean handleOptionSelection(int itemId) {
-        // Double-click prevention, using threshold of 500 ms
-        if (SystemClock.elapsedRealtime() - mLastClickTime < 500) {
-            return false;
-        }
-        mLastClickTime = SystemClock.elapsedRealtime();
-
-        switch (itemId) {
-            case R.id.menu_settings_core:
-                mView.launchSettingsActivity(SettingsFile.FILE_NAME_CONFIG);
-                return true;
-
-            case R.id.button_add_directory:
-                launchFileListActivity(REQUEST_ADD_DIRECTORY);
-                return true;
-
-            case R.id.button_install_keys:
-                launchFileListActivity(REQUEST_INSTALL_KEYS);
-                return true;
-
-            case R.id.button_select_gpu_driver:
-                launchFileListActivity(REQUEST_SELECT_GPU_DRIVER);
-                return true;
-        }
-
-        return false;
-    }
-
-    public void addDirIfNeeded(AddDirectoryHelper helper) {
-        if (mDirToAdd != null) {
-            helper.addDirectory(mDirToAdd, mView::refresh);
-
-            mDirToAdd = null;
-        }
-    }
-
-    public void onDirectorySelected(String dir) {
-        mDirToAdd = dir;
-    }
-
-    public void refreshGameList() {
-        GameDatabase databaseHelper = YuzuApplication.databaseHelper;
-        databaseHelper.scanLibrary(databaseHelper.getWritableDatabase());
-        mView.refresh();
-    }
-}

src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainPresenter.kt

@@ -0,0 +1,66 @@
+package org.yuzu.yuzu_emu.ui.main
+
+import org.yuzu.yuzu_emu.BuildConfig
+import org.yuzu.yuzu_emu.R
+import org.yuzu.yuzu_emu.YuzuApplication
+import org.yuzu.yuzu_emu.features.settings.utils.SettingsFile
+import org.yuzu.yuzu_emu.utils.AddDirectoryHelper
+
+class MainPresenter(private val view: MainView) {
+    private var dirToAdd: String? = null
+
+    fun onCreate() {
+        val versionName = BuildConfig.VERSION_NAME
+        view.setVersionString(versionName)
+        refreshGameList()
+    }
+
+    private fun launchFileListActivity(request: Int) {
+        view.launchFileListActivity(request)
+    }
+
+    fun handleOptionSelection(itemId: Int): Boolean {
+        when (itemId) {
+            R.id.menu_settings_core -> {
+                view.launchSettingsActivity(SettingsFile.FILE_NAME_CONFIG)
+                return true
+            }
+            R.id.button_add_directory -> {
+                launchFileListActivity(REQUEST_ADD_DIRECTORY)
+                return true
+            }
+            R.id.button_install_keys -> {
+                launchFileListActivity(REQUEST_INSTALL_KEYS)
+                return true
+            }
+            R.id.button_select_gpu_driver -> {
+                launchFileListActivity(REQUEST_SELECT_GPU_DRIVER)
+                return true
+            }
+        }
+        return false
+    }
+
+    fun addDirIfNeeded(helper: AddDirectoryHelper) {
+        if (dirToAdd != null) {
+            helper.addDirectory(dirToAdd) { view.refresh() }
+            dirToAdd = null
+        }
+    }
+
+    fun onDirectorySelected(dir: String?) {
+        dirToAdd = dir
+    }
+
+    private fun refreshGameList() {
+        val databaseHelper = YuzuApplication.databaseHelper
+        databaseHelper!!.scanLibrary(databaseHelper.writableDatabase)
+        view.refresh()
+    }
+
+    companion object {
+        const val REQUEST_ADD_DIRECTORY = 1
+        const val REQUEST_INSTALL_KEYS = 2
+        const val REQUEST_SELECT_GPU_DRIVER = 3
+    }
+}