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| -rw-r--r-- | docs/html/sdk/ndk/1.5_r1/index.jd (renamed from docs/html/sdk/ndk/1.5-r1/index.jd) | 77 | ||||
| -rw-r--r-- | docs/html/sdk/sdk_toc.cs | 6 |
2 files changed, 57 insertions, 26 deletions
diff --git a/docs/html/sdk/ndk/1.5-r1/index.jd b/docs/html/sdk/ndk/1.5_r1/index.jd index 3d3137c..48794c0 100644 --- a/docs/html/sdk/ndk/1.5-r1/index.jd +++ b/docs/html/sdk/ndk/1.5_r1/index.jd @@ -1,32 +1,35 @@ ndk=true ndk.version=1.5 ndk.rel.id=1 -ndk.date=May 2009 +ndk.date=June 2009 ndk.win_download=android-ndk-1.5_r1-windows.zip -ndk.win_bytes=22450814 -ndk.win_checksum=7b7836f705ec7e66225794edda34000f +ndk.win_bytes=22500667 +ndk.win_checksum=e5c53915903d8b81f3e2ea422e2e2717 ndk.mac_download=android-ndk-1.5_r1-darwin-x86.zip -ndk.mac_bytes=17165450 -ndk.mac_checksum=214ccfd704c0307609fbabeb7bf86acc +ndk.mac_bytes=17215303 +ndk.mac_checksum=1931f0e182798a4c98924fd87380b5b8 ndk.linux_download=android-ndk-1.5_r1-linux-x86.zip -ndk.linux_bytes=15976032 -ndk.linux_checksum=808fd4d6a7e45f76d546ba04ab9ef060 - -ndk.linux_64_download=android-ndk-1.5_r1-linux-x86_64.zip -ndk.linux_64_bytes=18112300 -ndk.linux_64_checksum=f8664c187b3ae077bcfe2b44294d0758 +ndk.linux_bytes=16025885 +ndk.linux_checksum=80a4e14704ca84c21bf1824cb25fbd8b page.title=Android 1.5 NDK, Release 1 @jd:body -<h2>What is the NDK?</h2> +<h2 id="overview">What is the Android NDK?</h2> + +<p>The Android NDK provides tools that allow Android application developers +to embed components that make use of native code in their Android applications. +</p> -<p>The Android 1.5 NDK provides tools that allow Android application developers -to embed and deploy native code within their Android applications. It -provides:</p> +<p>Android applications run in the Dalvik virtual machine. The NDK allows +developers to implement parts of their applications using native-code languages +such as C and C++. This can provide benefits to certain classes of applications, +in the form of reuse of existing code and in some cases increased speed.</p> + +<p>The NDK provides:</p> <ul> <li>A set of tools and build files used to generate native code libraries from C @@ -35,18 +38,21 @@ and C++ sources</li> files (.apks) that can be deployed on Android devices</li> <li>A set of native system headers and libraries that will be supported in all future versions of the Android platform, starting from Android 1.5 </li> +<li>Documentation, samples, and tutorials</li> </ul> -<p>This release of the NDK release supports the ARMv5TE machine instruction set -and provides stable headers for libc (the C library), libm (the Math library) -and the JNI interface.</p> +<p>This release of the NDK supports the ARMv5TE machine instruction set +and provides stable headers for libc (the C library), libm (the Math library), +the JNI interface, and other libraries.</p> -<p>Using the NDK may not be relevant for all Android applications. As a -developer, you will need to balance its benefits (faster execution) and its -drawbacks (no portability, JNI overhead, no access to system libraries, and -difficult debugging). Typical good candidates for the NDK are CPU-intensive -operations that don't allocate too much memory, such as signal processing, -physics simulation, custom bytecode/instruction interpreters, and so on.</p> +<p>The NDK will not benefit most applications. As a developer, you will need +to balance its benefits against its drawbacks; notably, using native code does +not result in an automatic performance increase, but does always increase +application complexity. Typical good candidates for the NDK are self-contained, +CPU-intensive operations that don't allocate much memory, such as signal processing, +physics simulation, and so on. Simply re-coding a method to run in C usually does +not result in a large performance increase. The NDK can, however, can be +an effective way to reuse a large corpus of existing C/C++ code.</p> <p>Please note that the NDK <em>does not</em> enable you to develop native-only applications. Android's primary runtime remains the Dalvik virtual machine.</p> @@ -64,8 +70,11 @@ guaranteed to be supported in all later releases of the platform:</p> <ul> <li>libc (C library) headers</li> -<li>libm (Math library) headers</li> +<li>libm (math library) headers</li> <li>JNI interface headers</li> +<li>libz (Zlib compression) headers</li> +<li>liblog (Android logging) header</li> +<li>A Minimal set of headers for C++ support</li> </ul> <p>The NDK also provides a build system that lets you work efficiently with your @@ -97,6 +106,22 @@ usage</li> defines the native sources you want to compile</li> <li>APPLICATION-MK.TXT — describes the use of the Application.mk file, which describes the native sources required by your Android application</li> +<li>HOWTO.TXT — information about common tasks associated with NDK +development.</li> +<li>SYSTEM-ISSUES.TXT — known issues in the Android system images +that you should be aware of, if you are developing using the NDK. </li> +<li>STABLE-APIS.TXT — a complete list of the stable APIs exposed +by headers in the NDK.</li> +</ul> + +<p>Additionally, the package includes detailed information about the "bionic" +C library provided with the Android platform that you should be aware of, if you +are developing using the NDK. You can find the documentation in the +<code><ndk>/docs/system/libc/</code> directory:</p> + +<ul> +<li>OVERVIEW.TXT — provides an overview of the "bionic" C library and the +features it offers.</li> </ul> <h4>Sample applications</h4> @@ -148,7 +173,7 @@ href="http://www.cygwin.com">Cygwin</a> is required.</li> <h4>Android platform compatibility</h4> <ul> <li>The native libraries created by the Android NDK can only be used on -devices running the Android 1.5 platform version or later. This is due to subtle +devices running the Android 1.5 platform version or later. This is due to toolchain and ABI related changes that make the native libraries incompatible with 1.0 and 1.1 system images.</li> <li>For this reason, you should use native libraries produced with the NDK in diff --git a/docs/html/sdk/sdk_toc.cs b/docs/html/sdk/sdk_toc.cs index 2079dd8..ce1ee6e 100644 --- a/docs/html/sdk/sdk_toc.cs +++ b/docs/html/sdk/sdk_toc.cs @@ -27,6 +27,12 @@ </ul> </li> <li> + <h2>Native Development Tools</h2> + <ul> + <li><a href="<?cs var:toroot ?>sdk/ndk/1.5_r1/index.html">Android 1.5 NDK, r1</a></li> + </ul> + </li> + <li> <h2>Previous SDK Releases</h2> <ul> <li><a href="<?cs var:toroot ?>sdk/1.1_r1/index.html">Android 1.1 SDK, r1</a></li> |