H291850336的专栏

ConceptsOn this pageBefore BeginningIntroductionHow It WorksNative Activities and ApplicationsBefore BeginningThis guide assumes假定 that you are:Already familiar with co

Jobject  对象 引用类型Java类型本地类型（JNI）描述boolean（布尔型）jboolean 无符号8个比特byte(字节型)jbyte 有符号8个比特char(字符型)jchar 无符号16个比特short(短整型)jshort 有符号16个比特

Using Prebuilt LibrariesOn this pageDeclaring a Prebuilt LibraryReferencing the Prebuilt Library from Other ModulesDebugging Prebuilt LibrariesSelecting ABIs for Prebuilt Libraries

Android.mkOn this pageOverviewBasicsVariables（变量） and Macros（指令集）Module-Description VariablesThis page describes the syntax(语法) of the Android.mk build file, which glues(黏合剂) you

Application.mkOn this pageOverviewVariablesThis document explains the Application.mk build file, which describes the native modules that your app requires. A module can be a stat

Using Existing Libraries使用现有的库This section discusses the use of existing libraries–both your own, and those that the NDK provides.It begins by telling you how to use your own prebuilt librarie

The cpufeatures LibraryOn this pageUsageFunctionsChange HistoryThe NDK provides a small library named cpufeatures that your app can use at runtime to detect检测 the target device's

MIPS Support每秒百万条指令（Million Instructions Per Second）On this pageOverviewCompatibilityThe NDK supports the mips ABI, which allows native code to run on Android-based devices t

Support for 64-bit x86On this pageOverviewStandalone ToolchainCompatibiltyThe Android NDK supports the x86_64 ABI. This ABI allows native code to run on Android-based devices usi

x86 SupportOn this pageOverviewARM NEON Intrinsics SupportStandalone ToolchainCompatibilityThe NDK includes support for the x86 ABI, which allows native code to run on Android-ba

NEON SupportOn this pageUsing LOCAL_ARM_NEONUsing the .neon SuffixBuild RequirementsRuntime DetectionSample CodeThe NDK supports the ARM Advanced先进，高级 SIMD单指令多数据玲构（Single Instruc

ABI ManagementCPU/ABI：模拟器要运行的系统印象文件On this pageSupported ABIsGenerating Code for a Specific ABIABI Management on the Android PlatformDifferent Android handsets(手机，装置) use

CPUs and Architectures  cpu和架构When you're working with native code, hardware matters. The NDK lets you ensure you're compiling for the right architectures and CPUs by giving you a variety of ABI

Standalone Toolchain独立的工具链On this pageSelecting Your ToolchainSelecting Your SysrootInvoking the CompilerWorking with ClangABI CompatibilityWarnings and LimitationsYou can use th

Getting Started with the NDKThe Native Development Kit (NDK) is a set of tools that allow you to leverage C and C++ code in your Android apps. You can use it either to build from your own source

ndk-buildOn this pageInternalsInvoking from the Command LineInvoking from Eclipse64-Bit and 32-Bit ToolchainsRequirementsThe ndk-build file is a shell script introduced in Androi

Building Your ProjectOne of the NDK's core purposes is allowing you to build C and C++ source code into shared libraries that you can use in your app.This section explains how to build native

JNI是Java Native Interface的缩写，它提供了若干的API实现了Java和其他语言的通信（主要是C&C++）一旦使用JNI，JAVA程序就丧失了JAVA平台的两个优点：1、程序不再跨平台。要想跨平台，必须在不同的系统环境下重新编译本地语言部分。2、程序不再是绝对安全的，本地代码的不当使用可能导致整个程序崩溃。一个通用规则是，你应该让本地方法集中在少数几个类当中。这样就降低了