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Android
Android Development Environment Setup and Build System ADB Commands Android Framework, Middleware, HAL and Libraries Android Applications … Read more
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Set Up Flutter on Ubuntu and Read flutter doctor
Build a reliable Flutter development environment on Ubuntu, then prove each layer works. This setup covers the Flutter SDK, Android toolchain, licenses, emulator or USB device, a real test app, and the difference between required and optional flutter doctor checks.
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Create Adaptive and Themed Android App Icons
An Android launcher icon is a layered resource, not a pre-cropped rounded PNG. Build separate foreground, background, and monochrome artwork, let the launcher apply its mask and tint, and keep the Google Play listing asset separate.
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Android Applications
Compiling Android application as part of AOSP source code How to develop first android Application/App in Android … Read more
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Fix “No Toolchains Found” Android NDK Error
The mips64el toolchain error usually means an old Android Gradle Plugin or native build expects files removed from newer NDKs. Diagnose the version boundary, modernize the build, and use a legacy NDK only as a controlled archival fallback.
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Build Your First Android App with Kotlin and Compose
Create a small but real Android app in modern Android Studio using Kotlin and Jetpack Compose. You will choose a package and minimum SDK, understand the generated project, build stateful UI, preview and test it, deploy to an emulator or phone, inspect logs, produce a debug APK, and know what changes for release.
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Install Flutter and Dart Plugins in Android Studio (Beginner-Friendly Guide)
Android Studio is a powerful IDE (Integrated Development Environment) built on IntelliJ, optimized for Android and Flutter … Read more
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Android Framework, Middleware
Android Framework Android Power OFF Sequence / How Android Shuts Down works ? How early suspend works … Read more
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Understanding Android Properties: Get, Set, and Use System Properties with Examples
Android system properties are key-value pairs maintained by Android’s property service, used by the operating system and … Read more
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Shell Script to Check if Android Device is Connected Over USB
For developers working with Android devices, connecting your device over USB is often an essential step in … Read more
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Prevent Screenshots in Android with FLAG_SECURE
`FLAG_SECURE` asks Android to keep a window out of screenshots and non-secure displays. Apply it before sensitive UI appears, understand its window-wide scope, and treat newer detection and screen-share APIs as complementary—not interchangeable—controls.
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Fix “Invoke-customs” Android min-api 26 Build Error
This dex error usually means a module or dependency emits Java 8 invocation bytecode without compatible desugaring. First configure the module correctly; if the failing code calls MethodHandle.invoke, use the API-26-safe path instead of masking the problem.
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Create an Android Upload Key for Google Play
For a Play App Signing release, your upload key proves that a bundle came from your team; Google’s app-signing key signs the APKs users install. Generate them as separate identities, protect the private material, and register the correct certificate fingerprints.
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Test Android BOOT_COMPLETED Receivers Safely
A synthetic ADB broadcast can test receiver routing, but it does not reproduce a complete reboot. Build a minimal boot receiver, enqueue durable work, respect user-unlock and background limits, and verify both explicit broadcasts and genuine device boots.
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Android Bluetooth Architecture: From API to HCI
A practical map of Android Bluetooth from framework APIs and Binder calls through the Bluetooth module, JNI, native host stack, vendor boundary, transport, and controller—with release-aware AOSP paths and debugging checkpoints.
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Fix “buildOutput.apkData must not be null” Safely
The internal `buildOutput.apkData must not be null` exception belongs mainly to older Android Studio 3.5-era builds. A project-local clean often repaired stale APK metadata, but modern diagnosis should first identify the exact Gradle wrapper, Android Gradle Plugin, JDK, IDE, task, and plugin combination.
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How to Create Equal-Sized Buttons in Android LinearLayout
Create equal width or height buttons in Android LinearLayout: master layout_weight=1, set layout_width=0dp, and build responsive UI layouts in XML.
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Understanding Android Services with Example
A Service is an application component that can perform long-running operations in the background, and it does … Read more
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Cross compiling C/C++ programs for Android using NDK Toolchains
If you are using NDK version more than r19, the toolchains which comes as part of NDK … Read more
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Turn On Bluetooth and Discoverability with ADB
ADB can open Android’s trusted system dialogs for enabling Bluetooth and temporary discoverability, but the user still controls consent. This guide shows the exact intents, duration extra, device targeting, verification, and the limits of unattended automation.