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Existing library
Picture-in-picture lets eligible video continue in a system-managed floating window while the user navigates elsewhere. Implement it as a player-state transition, with modern auto-entry, lifecycle-aware UI, graceful fallbacks, and device-level tests.
LOCAL_LDLIBS is appropriate for stable NDK system libraries such as log or z. External libraries should normally be declared as source-built or prebuilt ndk-build modules so headers, ABI selection, dependency order, packaging, and runtime loading remain reproducible.
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.
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.
This error belongs to legacy Android Support Library projects. Trace the dependency that introduced an older artifact, then either align everything on 28.0.0 or finish the move to AndroidX.
Learn how to create an Android AAR library module in Gradle, define public API interfaces, link local module dependencies, and invoke library functions.
Extract video duration, resolution, audio album art, and frame thumbnails in Android using MediaMetadataRetriever for local files and remote HTTP URLs.
Trace how AOSP initializes Bluetooth profiles (A2DP, HFP, GATT) from SystemServer and AdapterService down to Fluoride HAL and Binder IPC.
Resolve 'error: package android.support.v7.app does not exist' and 'cannot resolve symbol AppCompatActivity' by migrating to AndroidX in Gradle.
