android: Clean up file extension checks

src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/SearchFragment.kt

@@ -29,7 +29,6 @@ import org.yuzu.yuzu_emu.layout.AutofitGridLayoutManager
 import org.yuzu.yuzu_emu.model.Game
 import org.yuzu.yuzu_emu.model.GamesViewModel
 import org.yuzu.yuzu_emu.model.HomeViewModel
-import org.yuzu.yuzu_emu.utils.FileUtil
 
 class SearchFragment : Fragment() {
     private var _binding: FragmentSearchBinding? = null
@@ -128,10 +127,7 @@ class SearchFragment : Fragment() {
 
             R.id.chip_homebrew -> baseList.filter { it.isHomebrew }
 
-            R.id.chip_retail -> baseList.filter {
-                FileUtil.hasExtension(it.path, "xci") ||
-                    FileUtil.hasExtension(it.path, "nsp")
-            }
+            R.id.chip_retail -> baseList.filter { !it.isHomebrew }
 
             else -> baseList
         }

src/android/app/src/main/java/org/yuzu/yuzu_emu/model/Game.kt

@@ -43,7 +43,7 @@ class Game(
 
     companion object {
         val extensions: Set<String> = HashSet(
-            listOf(".xci", ".nsp", ".nca", ".nro")
+            listOf("xci", "nsp", "nca", "nro")
         )
     }
 }

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

@@ -294,7 +294,7 @@ class MainActivity : AppCompatActivity(), ThemeProvider {
                 return@registerForActivityResult
             }
 
-            if (!FileUtil.hasExtension(result, "keys")) {
+            if (FileUtil.getExtension(result) != "keys") {
                 MessageDialogFragment.newInstance(
                     R.string.reading_keys_failure,
                     R.string.install_prod_keys_failure_extension_description
@@ -391,7 +391,7 @@ class MainActivity : AppCompatActivity(), ThemeProvider {
                 return@registerForActivityResult
             }
 
-            if (!FileUtil.hasExtension(result, "bin")) {
+            if (FileUtil.getExtension(result) != "bin") {
                 MessageDialogFragment.newInstance(
                     R.string.reading_keys_failure,
                     R.string.install_amiibo_keys_failure_extension_description

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/FileUtil.kt

@@ -7,7 +7,6 @@ import android.content.Context
 import android.database.Cursor
 import android.net.Uri
 import android.provider.DocumentsContract
-import android.provider.OpenableColumns
 import androidx.documentfile.provider.DocumentFile
 import java.io.BufferedInputStream
 import java.io.File
@@ -185,19 +184,18 @@ object FileUtil {
 
     /**
      * Get file display name from given path
-     * @param path content uri path
+     * @param uri content uri
      * @return String display name
      */
-    fun getFilename(context: Context, path: String): String {
-        val resolver = context.contentResolver
+    fun getFilename(uri: Uri): String {
+        val resolver = YuzuApplication.appContext.contentResolver
         val columns = arrayOf(
             DocumentsContract.Document.COLUMN_DISPLAY_NAME
         )
         var filename = ""
         var c: Cursor? = null
         try {
-            val mUri = Uri.parse(path)
-            c = resolver.query(mUri, columns, null, null, null)
+            c = resolver.query(uri, columns, null, null, null)
             c!!.moveToNext()
             filename = c.getString(0)
         } catch (e: Exception) {
@@ -326,25 +324,9 @@ object FileUtil {
         }
     }
 
-    fun hasExtension(path: String, extension: String): Boolean =
-        path.substring(path.lastIndexOf(".") + 1).contains(extension)
-
-    fun hasExtension(uri: Uri, extension: String): Boolean {
-        val fileName: String?
-        val cursor = YuzuApplication.appContext.contentResolver.query(uri, null, null, null, null)
-        val nameIndex = cursor?.getColumnIndex(OpenableColumns.DISPLAY_NAME)
-        cursor?.moveToFirst()
-
-        if (nameIndex == null) {
-            return false
-        }
-
-        fileName = cursor.getString(nameIndex)
-        cursor.close()
-
-        if (fileName == null) {
-            return false
-        }
-        return fileName.substring(fileName.lastIndexOf(".") + 1).contains(extension)
+    fun getExtension(uri: Uri): String {
+        val fileName = getFilename(uri)
+        return fileName.substring(fileName.lastIndexOf(".") + 1)
+            .lowercase()
     }
 }

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/GameHelper.kt

@@ -6,7 +6,6 @@ package org.yuzu.yuzu_emu.utils
 import android.content.SharedPreferences
 import android.net.Uri
 import androidx.preference.PreferenceManager
-import java.util.*
 import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
 import org.yuzu.yuzu_emu.NativeLibrary
@@ -33,15 +32,9 @@ object GameHelper {
         val children = FileUtil.listFiles(context, gamesUri)
         for (file in children) {
             if (!file.isDirectory) {
-                val filename = file.uri.toString()
-                val extensionStart = filename.lastIndexOf('.')
-                if (extensionStart > 0) {
-                    val fileExtension = filename.substring(extensionStart)
-
-                    // Check that the file has an extension we care about before trying to read out of it.
-                    if (Game.extensions.contains(fileExtension.lowercase(Locale.getDefault()))) {
-                        games.add(getGame(filename))
-                    }
+                // Check that the file has an extension we care about before trying to read out of it.
+                if (Game.extensions.contains(FileUtil.getExtension(file.uri))) {
+                    games.add(getGame(file.uri))
                 }
             }
         }
@@ -59,21 +52,19 @@ object GameHelper {
         return games.toList()
     }
 
-    private fun getGame(filePath: String): Game {
+    private fun getGame(uri: Uri): Game {
+        val filePath = uri.toString()
         var name = NativeLibrary.getTitle(filePath)
 
         // If the game's title field is empty, use the filename.
         if (name.isEmpty()) {
-            name = filePath.substring(filePath.lastIndexOf("/") + 1)
+            name = FileUtil.getFilename(uri)
         }
         var gameId = NativeLibrary.getGameId(filePath)
 
         // If the game's ID field is empty, use the filename without extension.
         if (gameId.isEmpty()) {
-            gameId = filePath.substring(
-                filePath.lastIndexOf("/") + 1,
-                filePath.lastIndexOf(".")
-            )
+            gameId = name.substring(0, name.lastIndexOf("."))
         }
 
         val newGame = Game(