diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.java
@@ -2,9 +2,11 @@
 
 import android.app.Activity;
 import android.content.BroadcastReceiver;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.net.Uri;
 import android.widget.Toast;
 
 import androidx.appcompat.app.AlertDialog;
@@ -13,10 +15,16 @@
 import org.dolphinemu.dolphinemu.BuildConfig;
 import org.dolphinemu.dolphinemu.NativeLibrary;
 import org.dolphinemu.dolphinemu.R;
+import org.dolphinemu.dolphinemu.features.settings.model.BooleanSetting;
 import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag;
 import org.dolphinemu.dolphinemu.model.GameFileCache;
 import org.dolphinemu.dolphinemu.services.GameFileCacheService;
 import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner;
+import org.dolphinemu.dolphinemu.utils.ContentHandler;
+import org.dolphinemu.dolphinemu.utils.FileBrowserHelper;
+
+import java.util.Arrays;
+import java.util.Set;
 
 public final class MainPresenter
 {
@@ -95,18 +103,40 @@ public boolean handleOptionSelection(int itemId, Context context)
     return false;
   }
 
-  public void addDirIfNeeded(Context context)
+  public void addDirIfNeeded()
   {
     if (mDirToAdd != null)
     {
-      GameFileCache.addGameFolder(mDirToAdd, context);
+      GameFileCache.addGameFolder(mDirToAdd);
       mDirToAdd = null;
     }
   }
 
-  public void onDirectorySelected(String dir)
+  public void onDirectorySelected(Intent result)
   {
-    mDirToAdd = dir;
+    Uri uri = result.getData();
+
+    boolean recursive = BooleanSetting.MAIN_RECURSIVE_ISO_PATHS.getBooleanGlobal();
+    String[] childNames = ContentHandler.getChildNames(uri, recursive);
+    if (Arrays.stream(childNames).noneMatch((name) -> FileBrowserHelper.GAME_EXTENSIONS.contains(
+            FileBrowserHelper.getExtension(name, false))))
+    {
+      AlertDialog.Builder builder = new AlertDialog.Builder(mContext, R.style.DolphinDialogBase);
+      builder.setMessage(mContext.getString(R.string.wrong_file_extension_in_directory,
+              FileBrowserHelper.setToSortedDelimitedString(FileBrowserHelper.GAME_EXTENSIONS)));
+      builder.setPositiveButton(R.string.ok, null);
+      builder.show();
+    }
+
+    ContentResolver contentResolver = mContext.getContentResolver();
+    Uri canonicalizedUri = contentResolver.canonicalize(uri);
+    if (canonicalizedUri != null)
+      uri = canonicalizedUri;
+
+    int takeFlags = result.getFlags() & Intent.FLAG_GRANT_READ_URI_PERMISSION;
+    mContext.getContentResolver().takePersistableUriPermission(uri, takeFlags);
+
+    mDirToAdd = uri.toString();
   }
 
   public void installWAD(String file)

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.java
@@ -2,6 +2,7 @@
 
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.net.Uri;
 import android.os.Bundle;
 import android.widget.Toast;
 
@@ -39,11 +40,11 @@ public final class TvMainActivity extends FragmentActivity implements MainView
 {
   private static boolean sShouldRescanLibrary = true;
 
-  private MainPresenter mPresenter = new MainPresenter(this, this);
+  private final MainPresenter mPresenter = new MainPresenter(this, this);
 
   private BrowseSupportFragment mBrowseFragment;
 
-  private ArrayList<ArrayObjectAdapter> mGameRows = new ArrayList<>();
+  private final ArrayList<ArrayObjectAdapter> mGameRows = new ArrayList<>();
 
   @Override
   protected void onCreate(Bundle savedInstanceState)
@@ -73,7 +74,7 @@ protected void onResume()
       GameFileCacheService.startLoad(this);
     }
 
-    mPresenter.addDirIfNeeded(this);
+    mPresenter.addDirIfNeeded();
 
     // In case the user changed a setting that affects how games are displayed,
     // such as system language, cover downloading...
@@ -167,14 +168,17 @@ public void launchSettingsActivity(MenuTag menuTag)
   @Override
   public void launchFileListActivity()
   {
-    FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS);
+    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
+    startActivityForResult(intent, MainPresenter.REQUEST_DIRECTORY);
   }
 
   @Override
   public void launchOpenFileActivity()
   {
-    FileBrowserHelper.openFilePicker(this, MainPresenter.REQUEST_GAME_FILE, false,
-            FileBrowserHelper.GAME_EXTENSIONS);
+    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+    intent.addCategory(Intent.CATEGORY_OPENABLE);
+    intent.setType("*/*");
+    startActivityForResult(intent, MainPresenter.REQUEST_GAME_FILE);
   }
 
   @Override
@@ -218,19 +222,21 @@ protected void onActivityResult(int requestCode, int resultCode, Intent result)
     // If the user picked a file, as opposed to just backing out.
     if (resultCode == MainActivity.RESULT_OK)
     {
+      Uri uri = result.getData();
       switch (requestCode)
       {
         case MainPresenter.REQUEST_DIRECTORY:
-          mPresenter.onDirectorySelected(FileBrowserHelper.getSelectedPath(result));
+          mPresenter.onDirectorySelected(result);
           break;
 
         case MainPresenter.REQUEST_GAME_FILE:
-          EmulationActivity.launch(this, FileBrowserHelper.getSelectedFiles(result));
+          FileBrowserHelper.runAfterExtensionCheck(this, uri,
+                  FileBrowserHelper.GAME_LIKE_EXTENSIONS,
+                  () -> EmulationActivity.launch(this, result.getData().toString()));
           break;
 
         case MainPresenter.REQUEST_WAD_FILE:
-          FileBrowserHelper.runAfterExtensionCheck(this, result.getData(),
-                  FileBrowserHelper.WAD_EXTENSION,
+          FileBrowserHelper.runAfterExtensionCheck(this, uri, FileBrowserHelper.WAD_EXTENSION,
                   () -> mPresenter.installWAD(result.getData().toString()));
           break;
       }

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/ContentHandler.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/ContentHandler.java
diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/FileBrowserHelper.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/FileBrowserHelper.java
@@ -28,7 +28,14 @@
 public final class FileBrowserHelper
 {
   public static final HashSet<String> GAME_EXTENSIONS = new HashSet<>(Arrays.asList(
-          "gcm", "tgc", "iso", "ciso", "gcz", "wbfs", "wia", "rvz", "wad", "dol", "elf", "dff"));
+          "gcm", "tgc", "iso", "ciso", "gcz", "wbfs", "wia", "rvz", "wad", "dol", "elf"));
+
+  public static final HashSet<String> GAME_LIKE_EXTENSIONS = new HashSet<>(GAME_EXTENSIONS);
+
+  static
+  {
+    GAME_LIKE_EXTENSIONS.add("dff");
+  }
 
   public static final HashSet<String> RAW_EXTENSION = new HashSet<>(Collections.singletonList(
           "raw"));
@@ -50,21 +57,6 @@ public static void openDirectoryPicker(FragmentActivity activity, HashSet<String
     activity.startActivityForResult(i, MainPresenter.REQUEST_DIRECTORY);
   }
 
-  public static void openFilePicker(FragmentActivity activity, int requestCode, boolean allowMulti,
-          HashSet<String> extensions)
-  {
-    Intent i = new Intent(activity, CustomFilePickerActivity.class);
-
-    i.putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, allowMulti);
-    i.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, false);
-    i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_FILE);
-    i.putExtra(FilePickerActivity.EXTRA_START_PATH,
-            Environment.getExternalStorageDirectory().getPath());
-    i.putExtra(CustomFilePickerActivity.EXTRA_EXTENSIONS, extensions);
-
-    activity.startActivityForResult(i, requestCode);
-  }
-
   @Nullable
   public static String getSelectedPath(Intent result)
   {
@@ -79,22 +71,6 @@ public static String getSelectedPath(Intent result)
     return null;
   }
 
-  @Nullable
-  public static String[] getSelectedFiles(Intent result)
-  {
-    // Use the provided utility method to parse the result
-    List<Uri> files = Utils.getSelectedFilesFromResult(result);
-    if (!files.isEmpty())
-    {
-      String[] paths = new String[files.size()];
-      for (int i = 0; i < files.size(); i++)
-        paths[i] = Utils.getFileForUri(files.get(i)).getAbsolutePath();
-      return paths;
-    }
-
-    return null;
-  }
-
   public static boolean isPathEmptyOrValid(StringSetting path)
   {
     return isPathEmptyOrValid(path.getStringGlobal());
@@ -112,10 +88,10 @@ public static void runAfterExtensionCheck(Context context, Uri uri, Set<String>
 
     String path = uri.getLastPathSegment();
     if (path != null)
-      extension = getExtension(new File(path).getName());
+      extension = getExtension(new File(path).getName(), false);
 
     if (extension == null)
-      extension = getExtension(ContentHandler.getDisplayName(uri));
+      extension = getExtension(ContentHandler.getDisplayName(uri), false);
 
     if (extension != null && validExtensions.contains(extension))
     {
@@ -133,10 +109,8 @@ public static void runAfterExtensionCheck(Context context, Uri uri, Set<String>
       int messageId = validExtensions.size() == 1 ?
               R.string.wrong_file_extension_single : R.string.wrong_file_extension_multiple;
 
-      ArrayList<String> extensionsList = new ArrayList<>(validExtensions);
-      Collections.sort(extensionsList);
-
-      message = context.getString(messageId, extension, join(", ", extensionsList));
+      message = context.getString(messageId, extension,
+              setToSortedDelimitedString(validExtensions));
     }
 
     new AlertDialog.Builder(context, R.style.DolphinDialogBase)
@@ -148,13 +122,22 @@ public static void runAfterExtensionCheck(Context context, Uri uri, Set<String>
   }
 
   @Nullable
-  private static String getExtension(@Nullable String fileName)
+  public static String getExtension(@Nullable String fileName, boolean includeDot)
   {
     if (fileName == null)
       return null;
 
     int dotIndex = fileName.lastIndexOf(".");
-    return dotIndex != -1 ? fileName.substring(dotIndex + 1) : null;
+    if (dotIndex == -1)
+      return null;
+    return fileName.substring(dotIndex + (includeDot ? 0 : 1));
+  }
+
+  public static String setToSortedDelimitedString(Set<String> set)
+  {
+    ArrayList<String> list = new ArrayList<>(set);
+    Collections.sort(list);
+    return join(", ", list);
   }
 
   // TODO: Replace this with String.join once we can use Java 8

diff --git a/Source/Android/app/src/main/res/values/strings.xml b/Source/Android/app/src/main/res/values/strings.xml
@@ -438,6 +438,7 @@ It can efficiently compress both junk data and encrypted Wii data.
     <string name="no_file_extension">The selected file does not appear to have a file name extension.\n\nContinue anyway?</string>
     <string name="wrong_file_extension_single">The selected file has the file name extension \"%1$s\", but \"%2$s\" was expected.\n\nContinue anyway?</string>
     <string name="wrong_file_extension_multiple">The selected file has the file name extension \"%1$s\", but one of these extensions was expected: %2$s\n\nContinue anyway?</string>
+    <string name="wrong_file_extension_in_directory">No compatible files were found in the selected location.\n\nThe supported formats are: %1$s</string>
     <string name="unavailable_paths">Dolphin does not have permission to access one or more configured paths. Would you like to fix this before starting?</string>
 
     <!-- Misc -->

diff --git a/Source/Android/jni/AndroidCommon/AndroidCommon.cpp b/Source/Android/jni/AndroidCommon/AndroidCommon.cpp
@@ -4,6 +4,7 @@
 
 #include "jni/AndroidCommon/AndroidCommon.h"
 
+#include <ios>
 #include <string>
 #include <string_view>
 #include <vector>
@@ -43,6 +44,14 @@ std::vector<std::string> JStringArrayToVector(JNIEnv* env, jobjectArray array)
   return result;
 }
 
+jobjectArray JStringArrayFromVector(JNIEnv* env, std::vector<std::string> vector)
+{
+  jobjectArray result = env->NewObjectArray(vector.size(), IDCache::GetStringClass(), nullptr);
+  for (jsize i = 0; i < vector.size(); ++i)
+    env->SetObjectArrayElement(result, i, ToJString(env, vector[i]));
+  return result;
+}
+
 bool IsPathAndroidContent(const std::string& uri)
 {
   return StringBeginsWith(uri, "content://");
@@ -66,6 +75,28 @@ std::string OpenModeToAndroid(std::string mode)
   return mode;
 }
 
+std::string OpenModeToAndroid(std::ios_base::openmode mode)
+{
+  std::string result;
+
+  if (mode & std::ios_base::in)
+    result += 'r';
+
+  if (mode & (std::ios_base::out | std::ios_base::app))
+    result += 'w';
+
+  if (mode & std::ios_base::app)
+    result += 'a';
+
+  constexpr std::ios_base::openmode t = std::ios_base::in | std::ios_base::trunc;
+  if ((mode & t) == t)
+    result += 't';
+
+  // The 'b' specifier is not supported. Since we're on POSIX, it's fine to just skip it.
+
+  return result;
+}
+
 int OpenAndroidContent(const std::string& uri, const std::string& mode)
 {
   JNIEnv* env = IDCache::GetEnvForThread();
@@ -81,6 +112,43 @@ bool DeleteAndroidContent(const std::string& uri)
                                       IDCache::GetContentHandlerDelete(), ToJString(env, uri));
 }
 
+jlong GetAndroidContentSizeAndIsDirectory(const std::string& uri)
+{
+  JNIEnv* env = IDCache::GetEnvForThread();
+  return env->CallStaticLongMethod(IDCache::GetContentHandlerClass(),
+                                   IDCache::GetContentHandlerGetSizeAndIsDirectory(),
+                                   ToJString(env, uri));
+}
+
+std::string GetAndroidContentDisplayName(const std::string& uri)
+{
+  JNIEnv* env = IDCache::GetEnvForThread();
+  jobject display_name =
+      env->CallStaticObjectMethod(IDCache::GetContentHandlerClass(),
+                                  IDCache::GetContentHandlerGetDisplayName(), ToJString(env, uri));
+  return display_name ? GetJString(env, reinterpret_cast<jstring>(display_name)) : "";
+}
+
+std::vector<std::string> GetAndroidContentChildNames(const std::string& uri)
+{
+  JNIEnv* env = IDCache::GetEnvForThread();
+  jobject children = env->CallStaticObjectMethod(IDCache::GetContentHandlerClass(),
+                                                 IDCache::GetContentHandlerGetChildNames(),
+                                                 ToJString(env, uri), false);
+  return JStringArrayToVector(env, reinterpret_cast<jobjectArray>(children));
+}
+
+std::vector<std::string> DoFileSearchAndroidContent(const std::string& directory,
+                                                    const std::vector<std::string>& extensions,
+                                                    bool recursive)
+{
+  JNIEnv* env = IDCache::GetEnvForThread();
+  jobject result = env->CallStaticObjectMethod(
+      IDCache::GetContentHandlerClass(), IDCache::GetContentHandlerDoFileSearch(),
+      ToJString(env, directory), JStringArrayFromVector(env, extensions), recursive);
+  return JStringArrayToVector(env, reinterpret_cast<jobjectArray>(result));
+}
+
 int GetNetworkIpAddress()
 {
   JNIEnv* env = IDCache::GetEnvForThread();

diff --git a/Source/Android/jni/AndroidCommon/AndroidCommon.h b/Source/Android/jni/AndroidCommon/AndroidCommon.h
@@ -4,7 +4,9 @@
 
 #pragma once
 
+#include <ios>
 #include <string>
+#include <vector>
 
 #include <jni.h>
 
@@ -17,12 +19,29 @@ bool IsPathAndroidContent(const std::string& uri);
 
 // Turns a C/C++ style mode (e.g. "rb") into one which can be used with OpenAndroidContent.
 std::string OpenModeToAndroid(std::string mode);
+std::string OpenModeToAndroid(std::ios_base::openmode mode);
 
 // Opens a given file and returns a file descriptor.
 int OpenAndroidContent(const std::string& uri, const std::string& mode);
 
 // Deletes a given file.
 bool DeleteAndroidContent(const std::string& uri);
+// Returns -1 if not found, -2 if directory, file size otherwise.
+jlong GetAndroidContentSizeAndIsDirectory(const std::string& uri);
+
+// An unmangled URI (one which the C++ code has not appended anything to) can't be relied on
+// to contain a file name at all. If a file name is desired, this function is the most reliable
+// way to get it, but the display name is not guaranteed to always actually be like a file name.
+// An empty string will be returned for files which do not exist.
+std::string GetAndroidContentDisplayName(const std::string& uri);
+
+// Returns the display names of all children of a directory, non-recursively.
+std::vector<std::string> GetAndroidContentChildNames(const std::string& uri);
+
+std::vector<std::string> DoFileSearchAndroidContent(const std::string& directory,
+                                                    const std::vector<std::string>& extensions,
+                                                    bool recursive);
+
 int GetNetworkIpAddress();
 int GetNetworkPrefixLength();
 int GetNetworkGateway();
diff --git a/Source/Android/jni/AndroidCommon/IDCache.cpp b/Source/Android/jni/AndroidCommon/IDCache.cpp
@@ -10,6 +10,8 @@ static constexpr jint JNI_VERSION = JNI_VERSION_1_6;
 
 static JavaVM* s_java_vm;
 
+static jclass s_string_class;
+
 static jclass s_native_library_class;
 static jmethodID s_display_alert_msg;
 static jmethodID s_do_rumble;
@@ -44,6 +46,10 @@ static jmethodID s_compress_cb_run;
 static jclass s_content_handler_class;
 static jmethodID s_content_handler_open_fd;
 static jmethodID s_content_handler_delete;
+static jmethodID s_content_handler_get_size_and_is_directory;
+static jmethodID s_content_handler_get_display_name;
+static jmethodID s_content_handler_get_child_names;
+static jmethodID s_content_handler_do_file_search;
 
 static jclass s_network_helper_class;
 static jmethodID s_network_helper_get_network_ip_address;
@@ -75,6 +81,11 @@ JNIEnv* GetEnvForThread()
   return owned.env;
 }
 
+jclass GetStringClass()
+{
+  return s_string_class;
+}
+
 jclass GetNativeLibraryClass()
 {
   return s_native_library_class;
@@ -210,6 +221,26 @@ jmethodID GetContentHandlerDelete()
   return s_content_handler_delete;
 }
 
+jmethodID GetContentHandlerGetSizeAndIsDirectory()
+{
+  return s_content_handler_get_size_and_is_directory;
+}
+
+jmethodID GetContentHandlerGetDisplayName()
+{
+  return s_content_handler_get_display_name;
+}
+
+jmethodID GetContentHandlerGetChildNames()
+{
+  return s_content_handler_get_child_names;
+}
+
+jmethodID GetContentHandlerDoFileSearch()
+{
+  return s_content_handler_do_file_search;
+}
+
 jclass GetNetworkHelperClass()
 {
   return s_network_helper_class;
@@ -229,6 +260,7 @@ jmethodID GetNetworkHelperGetNetworkGateway()
 {
   return s_network_helper_get_network_gateway;
 }
+
 }  // namespace IDCache
 
 #ifdef __cplusplus
@@ -243,6 +275,9 @@ jint JNI_OnLoad(JavaVM* vm, void* reserved)
   if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION) != JNI_OK)
     return JNI_ERR;
 
+  const jclass string_class = env->FindClass("java/lang/String");
+  s_string_class = reinterpret_cast<jclass>(env->NewGlobalRef(string_class));
+
   const jclass native_library_class = env->FindClass("org/dolphinemu/dolphinemu/NativeLibrary");
   s_native_library_class = reinterpret_cast<jclass>(env->NewGlobalRef(native_library_class));
   s_display_alert_msg = env->GetStaticMethodID(s_native_library_class, "displayAlertMsg",
@@ -306,6 +341,15 @@ jint JNI_OnLoad(JavaVM* vm, void* reserved)
                                                      "(Ljava/lang/String;Ljava/lang/String;)I");
   s_content_handler_delete =
       env->GetStaticMethodID(s_content_handler_class, "delete", "(Ljava/lang/String;)Z");
+  s_content_handler_get_size_and_is_directory = env->GetStaticMethodID(
+      s_content_handler_class, "getSizeAndIsDirectory", "(Ljava/lang/String;)J");
+  s_content_handler_get_display_name = env->GetStaticMethodID(
+      s_content_handler_class, "getDisplayName", "(Ljava/lang/String;)Ljava/lang/String;");
+  s_content_handler_get_child_names = env->GetStaticMethodID(
+      s_content_handler_class, "getChildNames", "(Ljava/lang/String;Z)[Ljava/lang/String;");
+  s_content_handler_do_file_search =
+      env->GetStaticMethodID(s_content_handler_class, "doFileSearch",
+                             "(Ljava/lang/String;[Ljava/lang/String;Z)[Ljava/lang/String;");
 
   const jclass network_helper_class =
       env->FindClass("org/dolphinemu/dolphinemu/utils/NetworkHelper");

diff --git a/Source/Android/jni/AndroidCommon/IDCache.h b/Source/Android/jni/AndroidCommon/IDCache.h
@@ -10,6 +10,8 @@ namespace IDCache
 {
 JNIEnv* GetEnvForThread();
 
+jclass GetStringClass();
+
 jclass GetNativeLibraryClass();
 jmethodID GetDisplayAlertMsg();
 jmethodID GetDoRumble();
@@ -44,6 +46,10 @@ jmethodID GetCompressCallbackRun();
 jclass GetContentHandlerClass();
 jmethodID GetContentHandlerOpenFd();
 jmethodID GetContentHandlerDelete();
+jmethodID GetContentHandlerGetSizeAndIsDirectory();
+jmethodID GetContentHandlerGetDisplayName();
+jmethodID GetContentHandlerGetChildNames();
+jmethodID GetContentHandlerDoFileSearch();
 
 jclass GetNetworkHelperClass();
 jmethodID GetNetworkHelperGetNetworkIpAddress();

diff --git a/Source/Core/Common/FileSearch.cpp b/Source/Core/Common/FileSearch.cpp
@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <functional>
+#include <iterator>
 
 #include "Common/CommonPaths.h"
 #include "Common/FileSearch.h"
@@ -15,6 +16,10 @@
 namespace fs = std::filesystem;
 #define HAS_STD_FILESYSTEM
 #else
+#ifdef ANDROID
+#include "jni/AndroidCommon/AndroidCommon.h"
+#endif
+
 #include <cstring>
 #include "Common/CommonFuncs.h"
 #include "Common/FileUtil.h"
@@ -24,36 +29,30 @@ namespace Common
 {
 #ifndef HAS_STD_FILESYSTEM
 
-static std::vector<std::string>
-FileSearchWithTest(const std::vector<std::string>& directories, bool recursive,
-                   std::function<bool(const File::FSTEntry&)> callback)
+static void FileSearchWithTest(const std::string& directory, bool recursive,
+                               std::vector<std::string>* result_out,
+                               std::function<bool(const File::FSTEntry&)> callback)
 {
-  std::vector<std::string> result;
-  for (const std::string& directory : directories)
-  {
-    File::FSTEntry top = File::ScanDirectoryTree(directory, recursive);
-
-    std::function<void(File::FSTEntry&)> DoEntry;
-    DoEntry = [&](File::FSTEntry& entry) {
-      if (callback(entry))
-        result.push_back(entry.physicalName);
-      for (auto& child : entry.children)
-        DoEntry(child);
-    };
-    for (auto& child : top.children)
+  File::FSTEntry top = File::ScanDirectoryTree(directory, recursive);
+
+  const std::function<void(File::FSTEntry&)> DoEntry = [&](File::FSTEntry& entry) {
+    if (callback(entry))
+      result_out->push_back(entry.physicalName);
+    for (auto& child : entry.children)
       DoEntry(child);
-  }
-  // remove duplicates
-  std::sort(result.begin(), result.end());
-  result.erase(std::unique(result.begin(), result.end()), result.end());
-  return result;
+  };
+
+  for (auto& child : top.children)
+    DoEntry(child);
 }
 
 std::vector<std::string> DoFileSearch(const std::vector<std::string>& directories,
                                       const std::vector<std::string>& exts, bool recursive)
 {
+  std::vector<std::string> result;
+
   bool accept_all = exts.empty();
-  return FileSearchWithTest(directories, recursive, [&](const File::FSTEntry& entry) {
+  const auto callback = [&exts, accept_all](const File::FSTEntry& entry) {
     if (accept_all)
       return true;
     if (entry.isDirectory)
@@ -63,7 +62,34 @@ std::vector<std::string> DoFileSearch(const std::vector<std::string>& directorie
       return name.length() >= ext.length() &&
              strcasecmp(name.c_str() + name.length() - ext.length(), ext.c_str()) == 0;
     });
-  });
+  };
+
+  for (const std::string& directory : directories)
+  {
+#ifdef ANDROID
+    // While File::ScanDirectoryTree (which is called in FileSearchWithTest) does handle Android
+    // content correctly, having a specialized implementation of DoFileSearch for Android content
+    // provides a much needed performance boost. Also, this specialized implementation will be
+    // required if we in the future replace the use of File::ScanDirectoryTree with std::filesystem.
+    if (IsPathAndroidContent(directory))
+    {
+      const std::vector<std::string> partial_result =
+          DoFileSearchAndroidContent(directory, exts, recursive);
+
+      result.insert(result.end(), std::make_move_iterator(partial_result.begin()),
+                    std::make_move_iterator(partial_result.end()));
+    }
+    else
+#endif
+    {
+      FileSearchWithTest(directory, recursive, &result, callback);
+    }
+  }
+
+  // remove duplicates
+  std::sort(result.begin(), result.end());
+  result.erase(std::unique(result.begin(), result.end()), result.end());
+  return result;
 }
 
 #else

diff --git a/Source/Core/Common/FileUtil.cpp b/Source/Core/Common/FileUtil.cpp
@@ -78,19 +78,40 @@ FileInfo::FileInfo(const char* path) : FileInfo(std::string(path))
 #else
 FileInfo::FileInfo(const std::string& path) : FileInfo(path.c_str())
 {
+#ifdef ANDROID
+  if (IsPathAndroidContent(path))
+    AndroidContentInit(path);
+  else
+#endif
+    m_exists = stat(path.c_str(), &m_stat) == 0;
 }
 
 FileInfo::FileInfo(const char* path)
 {
-  m_exists = stat(path, &m_stat) == 0;
+#ifdef ANDROID
+  if (IsPathAndroidContent(path))
+    AndroidContentInit(path);
+  else
+#endif
+    m_exists = stat(path, &m_stat) == 0;
 }
 #endif
 
 FileInfo::FileInfo(int fd)
 {
-  m_exists = fstat(fd, &m_stat);
+  m_exists = fstat(fd, &m_stat) == 0;
 }
 
+#ifdef ANDROID
+void FileInfo::AndroidContentInit(const std::string& path)
+{
+  const jlong result = GetAndroidContentSizeAndIsDirectory(path);
+  m_exists = result != -1;
+  m_stat.st_mode = result == -2 ? S_IFDIR : S_IFREG;
+  m_stat.st_size = result >= 0 ? result : 0;
+}
+#endif
+
 bool FileInfo::Exists() const
 {
   return m_exists;
@@ -476,14 +497,47 @@ FSTEntry ScanDirectoryTree(const std::string& directory, bool recursive)
   {
     const std::string virtual_name(TStrToUTF8(ffd.cFileName));
 #else
-  DIR* dirp = opendir(directory.c_str());
-  if (!dirp)
-    return parent_entry;
+  DIR* dirp = nullptr;
+
+#ifdef ANDROID
+  std::vector<std::string> child_names;
+  if (IsPathAndroidContent(directory))
+  {
+    child_names = GetAndroidContentChildNames(directory);
+  }
+  else
+#endif
+  {
+    dirp = opendir(directory.c_str());
+    if (!dirp)
+      return parent_entry;
+  }
+
+#ifdef ANDROID
+  auto it = child_names.cbegin();
+#endif
 
   // non Windows loop
-  while (dirent* result = readdir(dirp))
+  while (true)
   {
-    const std::string virtual_name(result->d_name);
+    std::string virtual_name;
+
+#ifdef ANDROID
+    if (!dirp)
+    {
+      if (it == child_names.cend())
+        break;
+      virtual_name = *it;
+      ++it;
+    }
+    else
+#endif
+    {
+      dirent* result = readdir(dirp);
+      if (!result)
+        break;
+      virtual_name = result->d_name;
+    }
 #endif
     if (virtual_name == "." || virtual_name == "..")
       continue;
@@ -514,7 +568,8 @@ FSTEntry ScanDirectoryTree(const std::string& directory, bool recursive)
   FindClose(hFind);
 #else
   }
-  closedir(dirp);
+  if (dirp)
+    closedir(dirp);
 #endif
 
   return parent_entry;

diff --git a/Source/Core/Common/FileUtil.h b/Source/Core/Common/FileUtil.h
@@ -18,6 +18,11 @@
 #include "Common/StringUtil.h"
 #endif
 
+#ifdef ANDROID
+#include "Common/StringUtil.h"
+#include "jni/AndroidCommon/AndroidCommon.h"
+#endif
+
 // User directory indices for GetUserPath
 enum
 {
@@ -109,6 +114,10 @@ class FileInfo final
   u64 GetSize() const;
 
 private:
+#ifdef ANDROID
+  void AndroidContentInit(const std::string& path);
+#endif
+
   struct stat m_stat;
   bool m_exists;
 };
@@ -214,14 +223,20 @@ std::string GetExeDirectory();
 bool WriteStringToFile(const std::string& filename, std::string_view str);
 bool ReadFileToString(const std::string& filename, std::string& str);
 
-// To deal with Windows being dumb at unicode:
+// To deal with Windows not fully supporting UTF-8 and Android not fully supporting paths.
 template <typename T>
 void OpenFStream(T& fstream, const std::string& filename, std::ios_base::openmode openmode)
 {
 #ifdef _WIN32
   fstream.open(UTF8ToTStr(filename).c_str(), openmode);
 #else
-  fstream.open(filename.c_str(), openmode);
+#ifdef ANDROID
+  // Unfortunately it seems like the non-standard __open is the only way to use a file descriptor
+  if (IsPathAndroidContent(filename))
+    fstream.__open(OpenAndroidContent(filename, OpenModeToAndroid(openmode)), openmode);
+  else
+#endif
+    fstream.open(filename.c_str(), openmode);
 #endif
 }
 

diff --git a/Source/Core/Core/Boot/Boot.cpp b/Source/Core/Core/Boot/Boot.cpp
@@ -158,6 +158,15 @@ BootParameters::GenerateFromFile(std::vector<std::string> paths,
   if (paths.size() == 1)
     paths.clear();
 
+#ifdef ANDROID
+  if (extension.empty() && IsPathAndroidContent(path))
+  {
+    const std::string display_name = GetAndroidContentDisplayName(path);
+    SplitPath(display_name, nullptr, nullptr, &extension);
+    std::transform(extension.begin(), extension.end(), extension.begin(), ::tolower);
+  }
+#endif
+
   static const std::unordered_set<std::string> disc_image_extensions = {
       {".gcm", ".iso", ".tgc", ".wbfs", ".ciso", ".gcz", ".wia", ".rvz", ".dol", ".elf"}};
   if (disc_image_extensions.find(extension) != disc_image_extensions.end() || is_drive)