React Native Notifications.java, show a notification

Notifications.java

package com.foo.bar;

import android.util.Log;

import android.content.Context;
import android.provider.Settings;

import java.lang.System;
import android.app.Notification;
import androidx.core.app.NotificationCompat;
import android.app.NotificationManager;
import android.app.NotificationChannel;
import android.content.Intent;
import android.app.PendingIntent;

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 com.facebook.react.bridge.ReadableMap;

public class Notifications extends ReactContextBaseJavaModule {
  private static ReactApplicationContext reactContext;

  Notifications(ReactApplicationContext context) {
    super(context);
    reactContext = context;
  }

  @Override
  public String getName() {
    return "Notifications";
  }

  @ReactMethod
  public void show(ReadableMap details) {
    Log.v("my-debug", "notifications show start");

    Intent notificationIntent = new Intent(
      reactContext,
      MainActivity.class
    );

    PendingIntent pendingIntent = PendingIntent.getActivity(
      reactContext,
      0,
      notificationIntent,
      Intent.FLAG_ACTIVITY_NEW_TASK
    );

    NotificationCompat.Builder b = new NotificationCompat.Builder(reactContext);

    b
      .setContentIntent(pendingIntent)
      .setContentText("Body text not working")
      .setSmallIcon(R.mipmap.ic_launcher)
      .setAutoCancel(true)
      .setChannelId("10000");

    if (details.hasKey("body")) {
      b.setContentText(details.getString("body"));
    }

    NotificationManager notificationManager =
      (NotificationManager) reactContext.getSystemService(Context.NOTIFICATION_SERVICE);

    // It's safe to call this repeatedly because creating an existing notification
    // channel performs no operation.
    // https://developer.android.com/training/notify-user/build-notification
    NotificationChannel notificationChannel = new NotificationChannel(
      "10000",
      "NOTIFICATION_CHANNEL_NAME",
      NotificationManager.IMPORTANCE_HIGH
    );

    notificationManager.createNotificationChannel(notificationChannel) ;

    notificationManager.notify(1, b.build());

    Log.v("my-debug", "notifications show reached end");
  }


}