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How to build Android APK/apk from command line interface on windows/mac?

Hello,

If you are looking for, to build or generate the android apk file (in your capacitor project) directly from the command line rather then opening Android Studio and building up.

I will share few steps and challenges face to build android apk from CLI on windows and also would share below the mac version of command line code too incase you are mac user.

First step first,

Before running the CLI command which I will be sharing below, we make sure we add the two things under Environment variables of windows system.

  • Java JDK or JAVA_HOME path
  • zipalign if not set or when you run command your cli throw error not zipalign command (so we need it too in the PATH variable of the windows system)
See last two entries in the image above, second entry were zipalign.exe is available under your real Android Studio folder.

Next, just try out these command you will be good to go

Windows CLI command for Android APK release build
cd android && 
gradlew.bat assembleRelease && 
cd app/build/outputs/apk/release &&
jarsigner -keystore YOUR_KEYSTORE_PATH -storepass YOUR_KEYSTORE_PASS app-release-unsigned.apk YOUR_KEYSTORE_ALIAS &&
zipalign 4 app-release-unsigned.apk app-release.apk

In Code above, note we are using gradlew.bat which is important to note for window users reset is same for MAC command too (didn’t tested on mac, channel of command source from the post), result would working for me on windows!

Note the date and time of output (compare to post date and time, I renamed the file to mdw-app-release.apk for use)
Mac CLI command for Android APK release build
cd android && 
./gradlew assembleRelease && 
cd app/build/outputs/apk/release &&
jarsigner -keystore YOUR_KEYSTORE_PATH -storepass YOUR_KEYSTORE_PASS app-release-unsigned.apk YOUR_KEYSTORE_ALIAS &&
zipalign 4 app-release-unsigned.apk app-release.apk

If you like to generate for debug just changed assembleRelease to assembleDebug and change the file names accordingly, from release to debug or whatever names you would like to prefix or suffix.

Hope this gives ideas and info for the challenge you might facing.

Happy Learning & Thanks for visit.

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Learning Tech

What does this actually means: Warning: The signer’s certificate is self-signed. POSIX file permission and/or symlink attributes detected.

If you encounter this warning message on CLI

What does this actually means: Warning: The signer's certificate is self-signed. POSIX file permission and/or symlink attributes detected. These attributes are ignored when signing and are not protected by the signature.

on after your local Android APK build for release version, basically it means, as learned from AI source to understand it real cause of the warning, so no need to worry much, you can continue reading the details for more understandings.

It indicates that the certificate used to sign the file is self-signed, meaning it was generated by the developer rather than being issued by a trusted certificate authority.

Additionally, the warning mentions POSIX file permission and/or symlink attributes. POSIX refers to the Portable Operating System Interface, which defines a standard set of APIs for compatibility between different Unix-like operating systems. The warning suggests that the file permissions and symbolic links present in the file are ignored during the signing process and are not protected by the digital signature.

This warning is informational and does not necessarily indicate an error or problem. Self-signed certificates are commonly used during development or testing stages, but for production or public distribution, it is recommended to use certificates issued by trusted certificate authorities.

If you are encountering this warning while signing an APK file, you can consider obtaining a certificate from a trusted certificate authority to replace the self-signed certificate. This will provide users with more confidence in the authenticity and integrity of the application. However, if you are using a self-signed certificate for personal or internal use, you can generally ignore this warning as long as you trust the source of the file and its contents.

It’s important to note that the warning regarding POSIX file permission and symlink attributes being ignored during signing does not have a significant impact on the functionality of the signed file. The signature primarily ensures the integrity of the file contents and detects any modifications made after signing.

Happy Learning!

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Learning Social

YouTube Key Color #FF0000


YouTube was founded by three former PayPal employees: Chad Hurley, Steve Chen, and Jawed Karim. They created the platform in February 2005 and launched it to the public in November 2005. The idea for YouTube came about when the founders had difficulty sharing videos from a dinner party, inspiring them to create a platform where users could easily upload, share, and watch videos online. The website quickly gained traction and popularity, eventually becoming the largest online video-sharing platform in the world.

Let
‘EM
VIDEOS

Chad Hurley, Steve Chen, & Jawed Karim

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Learning Social

Facebook Key Color #1877F2

Facebook was founded by Mark Zuckerberg, along with his college roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes. Mark Zuckerberg, a Harvard University student at the time, launched Facebook in February 2004 as a social networking website initially limited to Harvard students. It later expanded to other universities, and eventually became available to the general public, gaining widespread popularity and becoming one of the largest social media platforms in the world.

Let
‘EM
NETWORKING

Mark Zuckerberg

Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes

Categories
Learning Social

Instagram Key Color #833AB4


Instagram was founded by Kevin Systrom and Mike Krieger. They launched the photo-sharing platform in October 2010. Kevin Systrom initially developed the idea for Instagram as a location-based social network called “Burbn” before pivoting to focus on photo-sharing, which eventually led to the creation of Instagram as we know it today.

Let
‘EM
Roll

Kevin Systrom & MIKE KRIEGER

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Learning

Instagram, Youtube and Facebook brand single color hexcode as main their attribute.

Here you go!

The main brand color hex codes of Instagram, YouTube, and Facebook:

  1. Instagram: #833AB4
  2. YouTube: #FF0000
  3. Facebook: #1877F2

Happy Finding!

Categories
Javascript Learning Tech

Function getStaticPaths, How to create paths in getStaticProps function If you have no access to create paths in getStaticPaths, NEXTJS

Hello,

Hope this is very interesting question of scenario you might be facing to solve with next js and

  • when you don’t want to use “function getServerSideProps” to pass dynamic (data as) props to the page components
  • when you don’t want too make a extra API calls to generate the paths for products or whatever list of thing you are creating in “function getStaticPaths”

Here is the quick things we need to work out to work this out of box for specially the scenario were are showing product detail view page which is of route like in Nextjs as “page/product/[id].js

First in function getStaticPaths() we just need to do this and pass fallback as “true” as we our dynamic path is not pre-rendered!

export async function getStaticPaths() {
    // Empty array since paths will be dynamically created in getStaticProps
    return {
        paths: [],
        fallback: true, // Set to true if there are dynamic paths that are not pre-rendered !! 
    };
};

Next, we need to edit our “getStaticProps” function and then voila;


export async function getStaticProps({ params }) {
    const product = await getProduct(params && params.id);
    if (!product) {
        return {
            redirect: {
                destination: '/',
                permanent: false,
            },
        }
    }

    return {
        props: {
            product,
            error: resp.error ? true : false
        }
    };
}

Boom you are done, and just use those props in your page component like



return (<PhotoProvider
        key={'photoprovider-key-' + product?.id}
        speed={() => 600}
        easing={(type) => (type === 2 ? '' : 'cubic-bezier(.25, 1, .30, 1)')}>

/*...other codes*/
</PhotoProvider>

you will find you page up and working, fine!

Hope this simple steps helps to solve our complex situations arises in the development work of software building on planet earth!

I would also like to the above situation, why we can’t just do the same thing simply with getServerSideProps in single function, I am facing the issue to build using next build && next export for android package, as dynamics cannot be rendered as html files due to getServerSideProps sitting in between, and also as per the Next JS docs we can’t do anything what I have found of my learnings.

Happy Learning! Thanks for reading.

Keep coding & Develop Wonderful.

To Follow help out to know: uidevwork

Categories
Javascript Learning Tech

What is forwardRef and how its helps in react?

Hello, lets quickly take a review on React forwardRef, what it in actual,

In React, the forwardRef function is a utility that allows you to pass a ref through a component to one of its children. It’s commonly used when you need to access the underlying DOM node or React component instance of a child component from the parent component.

When you create a component using functional components in React, you can use the useRef hook to create a ref object. This ref object can then be passed as a prop to child components. However, when you pass the ref as a prop to a child component, React does not automatically pass it down to the underlying DOM element or custom component. This is where forwardRef comes into play.

By using forwardRef, you can create a component that accepts a ref and forwards it to one of its children. Here’s an example:

const ChildComp = React.forwardRef((props, ref) => {
  // Use the ref object to access the underlying DOM node or component instance
  return <input ref={ref} />;
});

const ParentComp = () => {
  const inputRef = React.useRef(null);

  const handleClick = () => {
    // Access the input element using the ref
    if (inputRef.current) {
      inputRef.current.focus();
    }
  };

  return (
    <div>
      <ChildComponent ref={inputRef} />
      <button onClick={handleClick}>Focus Input</button>
    </div>
  );
};

In the example above, the ChildComponent uses forwardRef to forward the ref prop to the <input> element. In the ParentComponent, a ref is created using the useRef hook and passed to ChildComponent using the ref prop. This allows the ParentComponent to access the input element and call the focus method when the button is clicked.

By using forwardRef, helps to bridge the gap between functional components and the imperative DOM or component operations that sometimes require direct access to child component element.

Note here we are accessing child’s component dom node not child component here as ref object, i.e can be consider as subtle difference to understand for our mind.

Hope this helps to clear out the basic concept behind using forwardRef in React.

Happy Learning!

Categories
Javascript Learning Tech

How to fix nextjs appending http://localhost:3000/_next/image? to the image srcset how to remove for production build for images?

Hello,

Welcome to the question and for the search, facing this issue? lets quickly see how we can fix this, with and in next.config.js file.

In Next.js, when using the next/image component, the src attribute is automatically transformed to a URL that goes through the Next.js image optimization pipeline. During development, this URL may include http://localhost:3000/_next/image? to indicate the local development server.

However, for production images, you can configure Next.js to remove the http://localhost:3000/_next/image? prefix. Here’s how you can achieve that:

Create a custom loader for Next.js images:

  • Open next.config.js and add the following code:
    • module.exports = {
    • images: {
      • loader: 'imgix',
      • path: '', // Remove the path prefix for production images
    • }, };
  • This configuration sets the loader option to use the imgix loader, which removes the http://localhost:3000/_next/image? prefix. The path option is set to an empty string, this will leave the prefix for image urls and left blank

Now you can easily build your project and test to images are loading fine with absolute url path if applied so.

Hope this help to solve the issue.

Happy Learning!

Categories
Learning Learning Tech

How to sync generated next.js out folder build to android/android studio in capacitor?

Hello, Welcome to the feel and question.

Here is a quick way do it out!

Build the Next.js project: Run the build command for your Next.js project, which typically generates a production-ready build in the “out”/ “build” folder.

npx next build && npx next export

Locate the build output: Once the build process is finished, locate the generated “out” folder in your Next.js project directory.

Copy the build output: Copy the entire contents of the “out” folder, including any subfolders and files.

Paste the build output in the Android project: Navigate to the root directory of your Android project in Capacitor. The default location is usually the “android” folder within your Capacitor project.

Paste the build output: Paste the contents of the “out” folder into the appropriate location in your Android project. By default, you can paste it into the “app/src/main/assets/public” directory of your Android project.

Sync the Android project: After pasting the build output, trigger a sync operation in Android Studio to ensure the changes are recognized. This can be done by clicking on the “Sync Project with Gradle Files” button or by selecting “File” -> “Sync Project with Gradle Files” in the Android Studio menu.

Build and run the Android project: Once the sync operation is complete, you can build and run your Android project to deploy the updated Next.js web application within your Capacitor app.

Voila you are done!.

Hope this question and learning helps.

Happy Learning!