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Tomoaki Imai
Tomoaki Imai

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1 day ago

AWS Cognito Authentication using Auth0 as OpenID Connect Provider

In many cases, we want to have access controls to our service. AWS Cognito provides us with a way to authorize users' access to AWS resources. While there are a few options for implementing authentication with Cognito(including AWS Amplify/Cognito User Pool), Auth0 has excellent benefits: Simple yet customizable Universal login …

AWS

4 min read

AWS Cognito Authentication using Auth0 as OpenID Connect Provider
AWS Cognito Authentication using Auth0 as OpenID Connect Provider

Published in Level Up Coding

·Jul 29, 2021

Deploying multiple Lambda functions in one CloudFormation stack

When adding a new function with Amplify, it will create a new stack on CloudFormation. If your project or team becomes larger this could cause an issue because CloudFormation allows you to create 200 stacks maximum per AWS account. As a workaround, we can deploy multiple functions from one resource…

AWS

3 min read

Deploying multiple Lambda functions in one CloudFormation stack
Deploying multiple Lambda functions in one CloudFormation stack

Published in AWS in Plain English

·Jul 26, 2021

Frontend Implementation Tips for Pinpoint and AWS Amplify on React Native

When you start using Amplify for your project, you will be surprised how much it will automate complicated development processes that lie along the way. However, when it comes to integrating push notifications, it’s not so helpful. …

AWS

6 min read

Frontend Implementation Tips for Pinpoint and AWS Amplify on React Native
Frontend Implementation Tips for Pinpoint and AWS Amplify on React Native

Jun 25, 2021

Mocking Camera functionality on iOS simulator with React Native

When you build an app that has a Camera functionality, you need to use a real device to go through the photo shooting process. However, sometimes you want to just use a simulator. There are few approaches you can take: Use Camera Library that supports iOS simulator like https://github.com/teslamotors/react-native-camera-kit Add…

React Native

4 min read

Mocking Camera functionality on iOS simulator with React Native
Mocking Camera functionality on iOS simulator with React Native

Published in Geek Culture

·Jun 20, 2021

Provisioned Concurrency with Amplify Lambda function

Provisioned Concurrency is a feature that keeps Lambda function up and running. Although Amplify does not support this feature out of the box, we can automate generating Provisioned Concurrency by customizing a CloudFormation file. In this article, I’m sharing a few tips to address Amplify specific issues for Provisioned Concurrency…

Amplify

4 min read

Provisioned Concurrency with Amplify Lambda function
Provisioned Concurrency with Amplify Lambda function

Published in Level Up Coding

·Feb 22, 2021

Gotchas using React Apollo MockProvider

MockProvider is a recommended way of mocking requests and results of Apollo client. The sample code seems to be straightforward, but when it comes to real-world usage, you can hit some stumbling blocks. Although there is already a great article on medium about MockProvider usage tips, I still spent a…

React

4 min read

Gotchas using React Apollo MockProvider
Gotchas using React Apollo MockProvider

Nov 4, 2020

Pitfalls I fell into during Apollo Client 3.0 migration

Recently I worked on migrating Apollo Client to 3.0 from 2.6 in our project. There are quite a few updates in Apollo 3.0 so I never underestimated the complexity of upgrading this library, but still, it took a few days to complete the task. …

Apollo Client

4 min read

Pitfalls I fell into during Apollo Client 3.0 migration
Pitfalls I fell into during Apollo Client 3.0 migration

Published in ProAndroidDev

·Apr 5, 2020

What to expect when converting an iOS app to an Android app in React Native

Recently, I worked on developing an Android app for my company’s product, which we have released an iOS app over a year ago. Since we are using React Native, a lot of code worked without making any change. …

Android App Development

8 min read

What to expect when converting an iOS app to an Android app on React Native
What to expect when converting an iOS app to an Android app on React Native

Feb 20, 2020

How to programmatically control Preview size of Android camera app

It’s been a while since I posted an article about how we take a photo using Camera2 API. Today I’m going to share the way to control the screen size of the preview. First, let me go through the necessary steps to configure the preview screen. Then I will explain…

Android

5 min read

How to programmatically control Preview size of Android camera app
How to programmatically control Preview size of Android camera app

Published in ProAndroidDev

·Nov 4, 2018

Understanding Camera2 API from callbacks(Part 2)

In the previous article, I explained how the preview and rendering work when the camera is launched with Camera2 API. Now we go to the next step, taking a photo. Once again, here’s the sample project I made for this series of article. It’s forked from https://github.com/googlesamples/android-Camera2Basic tomoima525/android-Camera2Basic Contribute to tomoima525/android-Camera2Basic development by creating an account on GitHub.github.com

Android App Development

4 min read

Understanding Camera2 API from callbacks(Part 2)
Understanding Camera2 API from callbacks(Part 2)
Tomoaki Imai

Tomoaki Imai

CTO at Knot, inc. Love to share ideas about React Native, AWS, and GraphQL. https://github.com/tomoima525

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