Reproducible
engineering
experiments

Handle Android button clicks in Kotlin: master setOnClickListener, ViewBinding binding.btnSubmit, Toast notifications, and lambda listeners.

Trace the Android OS power-off shutdown sequence in AOSP: inspect ShutdownThread.java, PowerManagerService, init reboot property, and kernel halt.

Open web links faster in Android apps using Chrome Custom Tabs in Kotlin: replace heavy WebViews, customize toolbar colors, and enable warm-up bindings.

Launch the Gmail email compose screen on button click in Android using Kotlin: build ACTION_SENDTO Intent with mailto: URI and subject extras.

Open Google Play Store app listing links directly in Android: launch market://details?id=package_name URI intents with HTTPS fallback in browser.

Resolve 'error: package android.support.v7.app does not exist' and 'cannot resolve symbol AppCompatActivity' by migrating to AndroidX in Gradle.