Android: Add code for "show folder", don't activate it since it's not…

… reliable (need a query on startup)

Common/System/Request.cpp

@@ -134,6 +134,7 @@ void System_CreateGameShortcut(const Path &path, const std::string &title) {
 	g_requestManager.MakeSystemRequest(SystemRequestType::CREATE_GAME_SHORTCUT, NO_REQUESTER_TOKEN, nullptr, nullptr, path.ToString(), title, 0);
 }
 
+// Also acts as just show folder, if you pass in a folder.
 void System_ShowFileInFolder(const Path &path) {
 	g_requestManager.MakeSystemRequest(SystemRequestType::SHOW_FILE_IN_FOLDER, NO_REQUESTER_TOKEN, nullptr, nullptr, path.ToString(), "", 0);
 }

android/jni/app-android.cpp

@@ -486,7 +486,7 @@ bool System_GetPropertyBool(SystemProperty prop) {
 	case SYSPROP_HAS_TEXT_INPUT_DIALOG:
 		return true;
 	case SYSPROP_HAS_OPEN_DIRECTORY:
-		return false;
+		return false;  // We have this implemented but it may or may not work depending on if a file explorer is installed.
 	case SYSPROP_HAS_ADDITIONAL_STORAGE:
 		return !g_additionalStorageDirs.empty();
 	case SYSPROP_HAS_BACK_BUTTON:
@@ -1144,6 +1144,9 @@ bool System_MakeRequest(SystemRequestType type, int requestId, const std::string
 	case SystemRequestType::NOTIFY_UI_STATE:
 		PushCommand("uistate", param1);
 		return true;
+	case SystemRequestType::SHOW_FILE_IN_FOLDER:
+		PushCommand("show_folder", param1);
+		return true;
 	default:
 		return false;
 	}

android/src/org/ppsspp/ppsspp/NativeActivity.java

@@ -1633,8 +1633,25 @@ public boolean processCommand(String command, String params) {
 				throw new Exception();
 			} catch (Exception e) {
 				NativeApp.reportException(e, params);
-
-
+			}
+		} else if (command.equals("show_folder")) {
+			try {
+				Uri selectedUri = Uri.parse(params);
+				Intent intent = new Intent(Intent.ACTION_VIEW);
+				intent.setDataAndType(selectedUri, "resource/folder");
+				if (intent.resolveActivityInfo(getPackageManager(), 0) != null) {
+					startActivity(intent);
+					Log.i(TAG, "Started activity for " + params);
+					return true;
+				} else {
+					Log.w(TAG, "No file explorer installed");
+					// if you reach this place, it means there is no any file
+					// explorer app installed on your device
+					return false;
+				}
+			} catch (Exception e) {
+				NativeApp.reportException(e, params);
+				return false;
 			}
 		}
 		return false;