Implement continuous deployment system to build Flutter app and deploy to Google Play using Codemagic.

Error:

FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:stripDebugDebugSymbols'.
> 1 exception was raised by workers:
  org.gradle.process.internal.ExecException: A problem occurred starting process 'command '/usr/local/share/android-sdk/ndk/23.1.7779620/toolchains/llvm/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-strip''

Configuration on codemagic:

Flutter channel: stable 
Mode: debug…

“ECONNRESET” means the other side of the TCP conversation abruptly closed its end of the connection. This is most probably due to one or more application protocol errors. You could look at the API server logs to see if it complains about something.

But since you are also looking for…

Background: What’s an Optional?

In Swift, Optional<Wrapped> is an option type: it can contain any value from the original ("Wrapped") type, or no value at all (the special value nil). An optional value must be unwrapped before it can be used.

Optional is a generic type, which means that Optional<Int> and Optional<String> are distinct…

Short answer:

• docker-compose: is a tool that takes a YAML file which describes your multi-container application and helps you create, start/stop, remove all those containers without having to type multiple docker ... commands for each container.
• Kubernetes: is a platform for managing containerized workloads and services, that facilitates both declarative configuration and…

After Sept 30, 2021, https get/post requests to a website using a Let’s Encrypt SSL certificate on an old Android 7 device were failing with this error: HandshakeException: Handshake error in client (OS Error: CERTIFICATE_VERIFY_FAILED: certificate has expired(handshake.cc:354))

Solution

In Flutter, to once again make SSL https connections on older devices…

Managing functions from provider will allow you to control functions from all pages.

If you change a variable you can call notifylistener() function inside your provider function. So that you can change state of widget.

I will try to explain it in a glance however this is an important subject…

The “whereIn limit of 10" is a Firestore hard constraint. It means that whether you use FutureBuilder or StreamBuilder, that limit-of-10 constraint still applies.

StreamBuilderimplementation:

StreamBuilder<QuerySnapshot>(
      stream: _yourStream,
      builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {

And you will need to adjust this to become a Stream

await firestore…

Python uses the symbol - as both a unary (-x) and a binary (x-y) operator. These have different operator precedence.

In specific, the ordering wrt // is:

• unary -
• binary //
• binary -

By introducing a 0 as 0--3//2, the first - is a binary - and is applied last…