React Native, Native Modules returns empty object - {} - react-native

Question

I've written native module for React Native, everything was done according to official documentation, but something went wrong, and Native Modules returns only empty object.
importing Native Modules in Component Home.js
All Module code was writen according to official docs
import {
NativeModules
} from 'react-native';
const { OptionsPackage } = NativeModules;
console.log(NativeModules) // {}
MainApplication.java file
#Override
protected List<ReactPackage> getPackages() {
#SuppressWarnings("UnnecessaryLocalVariable")
List<ReactPackage> packages = new PackageList(this).getPackages();
// Packages that cannot be autolinked yet can be added manually here, for example:
// packages.add(new MyReactNativePackage());
packages.add(new OptionsPackage());
return packages;
}
OptionsPackage.java file
package package.name;
import com.facebook.react.ReactPackage;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.uimanager.ViewManager;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class OptionsPackage implements ReactPackage {
#Override
public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
return Collections.emptyList();
}
#Override
public List<NativeModule> createNativeModules(
ReactApplicationContext reactContext) {
List<NativeModule> modules = new ArrayList<>();
modules.add(new OptionsModule(reactContext));
return modules;
}
}
OptionsModule.java
package com.downloadmanager;
import com.facebook.react.bridge.NativeModule;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.List;
import java.io.InputStream;
...
public class OptionsModule extends ReactContextBaseJavaModule {
ActivityManager activityManager;
int currentSDK;
ReactApplicationContext context;
OptionsModule(ReactApplicationContext context) {
super(context);
this.activityManager = ((ActivityManager) context.getSystemService(ReactApplicationContext.ACTIVITY_SERVICE));
context = context;
currentSDK = android.os.Build.VERSION.SDK_INT;
}
#Override
public String getName() {
return "123";
}
private Map packageInfoToMap(PackageInfo pi) {
PackageManager pm = this.context.getPackageManager();
long longVersionCode;
Map<String, Object> AppInfo = new HashMap<String, Object>();
if(Build.VERSION.SDK_INT >= 28) {
longVersionCode = pi.getLongVersionCode();
} else
{
longVersionCode = pi.versionCode; }
AppInfo.put("packageName", pi.packageName);
AppInfo.put("versionName", pi.versionName);
AppInfo.put("getLongVersionCode", longVersionCode);
AppInfo.put("lastUpdateTime", (pi.lastUpdateTime));
AppInfo.put("firstInstallTime", pi.firstInstallTime);
String title = pi.applicationInfo.loadLabel(pm).toString();
String description = pi.applicationInfo.loadDescription(pm).toString();
Drawable icon = pi.applicationInfo.loadIcon(pm);
AppInfo.put("title", title);
AppInfo.put("description", description);
AppInfo.put("icon", icon);
//get folder
String apkDir = pi.applicationInfo.publicSourceDir;
File file = new File(apkDir);
double size = file.length();
AppInfo.put("filePath", apkDir);
AppInfo.put("size", size);
return AppInfo;
}
#ReactMethod
public List listOfApps(String type) {
List<PackageInfo> packages = this.context.getPackageManager().getInstalledPackages(0);
List<Map<String, Object>> listOfApps = new ArrayList();
for (PackageInfo isPackage : packages) {
boolean isSystem = (isPackage.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == ApplicationInfo.FLAG_SYSTEM;
if(type == "systemOnly" && isSystem) {
listOfApps.add(this.packageInfoToMap(isPackage));
} else if (type == "nonSystem" && !isSystem) {
listOfApps.add(this.packageInfoToMap(isPackage));
} else {
listOfApps.add(this.packageInfoToMap(isPackage));
}
}
return listOfApps;
}
}

Answer 1

Your getName() override method in OptionsModule is returning "123"
#Override
public String getName() {
return "123";
}
This is how react native gets the name of your module that should show up on react native side.
Try changing it to "OptionsModule" and then in your Home.js do
const {OptionsModule} = NativeModules
Also try calling your #ReactMethod in js to see if it works, don't rely on console logging NativeModules.