360 Mobile tech channel sharing practical experience and original insights from 360 Mobile Security and other teams across Android, iOS, big data, AI, and more.
This article analyzes Android P's hidden API restrictions, explains the underlying distinction mechanisms, and presents three practical techniques—direct calls with a provided module, classloader manipulation via reflection, and access flag tampering—to reliably invoke hidden system APIs on Android devices.
This article examines the Android P DP1 hidden‑API restrictions, detailing the compilation‑time generation of grey‑list files, the transformation of access flags in DEX structures, and the runtime checks performed by the ART virtual machine to enforce non‑SDK call limits.
This guide explains how to decode a video, render a watermark with OpenGL, re‑encode the frames, and mux them into a new file on Android, covering texture types, viewport positioning, blending, and the required MediaCodec and MediaMuxer code.
This tutorial explains how to use Android's MediaCodec to encode video frames—either via byte arrays or an input Surface—and then combine the encoded video with audio using MediaMuxer to produce a synchronized MP4 file, complete with code samples and step‑by‑step guidance.
This guide explains how to convert video stream data into individual bitmap images on Android by using SurfaceTexture to receive decoded frames, OpenGL to render them as external textures, and glReadPixels to capture the RGBA data for saving as PNG files.
This guide walks through using Android's MediaCodec with a TextureView to extract, decode, and render video frames, covering setup of TextureView, MediaExtractor, handling input and output buffers, synchronizing playback with PTS/DTS, and adding audio playback via AudioTrack and Sonic library.
This tutorial walks through the complete Android MediaCodec workflow, covering creation, configuration, synchronous and asynchronous data handling, buffer management, and proper end‑of‑stream signaling for both encoding and decoding scenarios.
This article explores Android’s MediaCodec API, detailing its role in hardware video encoding/decoding, buffer management, data types, lifecycle states, and practical code examples, providing developers with a comprehensive guide to implementing advanced video processing features such as watermarking and transcoding on mobile devices.
This article introduces the ELF file format used in Linux and Android, explains its three main types, compares it to Windows PE, and outlines how linkers and loaders interpret ELF headers, sections, and segments for native development and reverse engineering.
This article explains how the two essential Gradle plugins—replugin-host-gradle and replugin-plugin-gradle—generate configuration files, inject AndroidManifest components, create built‑in plugin descriptors, and use Transform API to modify bytecode, enabling seamless plugin development and integration in Android projects.
