Method 1.1.google directly download the NDK source code decompression can be, the current version is android-ndk-r9dConfiguring $ndk_home and $PATHExport ndk_home=/xxx/android-ndk-r9dExport path= $NDK _home: $PATH2. Extract ToolchainReference: docs/standalone-toolchain.htmlA. Viewing the target instruction set arm or x86 or MIPSB. Configure the directory for the header and root files used by the GCC compila
Should some students request, the previous articles to synthesize this oneBefore starting this topic, let's start with a brief introduction of what is NDK and JNI, some of which are from the WebWhat is the Android ndk and why do we use the NDK?The Android NDK was added in front of the SDK with the word "native", the native development Kit, which Google called the "NDK". As is known to all,
Android _ android binds events to button controls in five ways. Android button controls
I. Preface
Here, we will introduceBinding events to controls -- buttons in Android.
II. Specific implementation
First: directly bound to the Button control:
Step 1. Set android: onClick =
Android learning route (19th) Supports different devices-Supports different (Android) platform versions and android routes
When the latest Android version provides great APIs for your application, you need to continue to support the old system version before more devices are updated. This course describes how to use th
The content of the article is from the Android Developer's official website, in order to prevent the re-entry, record a bit. Website: https://developer.android.com/ndk/guides/standalone_toolchain.html
Standalone tool chain content Select your Toolchain Select your sysroot call compiler to use Clang ABI compatibility warnings and restrictions
You can use the toolchain
Introduction to six recommended open-source frameworks for android (android) and android
1. volley
Project address https://github.com/smanikandan14/Volley-demo
(1) asynchronous download of JSON and images;(2) Sort network requests (scheduling)(3) priority processing of network requests(4) Cache(5) Multi-Level cancellation request(6) Interaction with Activity and
Android: Network Operations in android and android
There is no difference between network operations in android and java. Many network operation methods in java can be moved to android for use. The main points are as follows:
1. Differences between post and get requests. You
Android development interview: 6. FAQs from common interviewers: Android question ② (updating...), android updated
Follow finddreams blog: http://blog.csdn.net/finddreams/article/details/445600611. What are their respective advantages and disadvantages of HttpURLConnection and HttpClient? HttpUrlConnection versions earlier than 2.3 have bugs. Therefore, HttpClie
Use NDK to implement cross-compiling between C and Java in Android.
Java in android relies on Java virtual machines, and its running efficiency is relatively low. Recently, in the efficient multiplication of large numbers, we found that JNI or NDK can implement mixed compilation of C and java, in addition, the dynamic library of c is referenced, and the c language in an
Learning about open-source android projects and open-source android ProjectsThis article collects a relatively good open-source Android project. Researching open-source projects is the best way to master the Android platform.
The core development team of Android provides 15
included, and the target represents the ARM CPU architecture in the context of current contexts. The "android-21" in the path represents the Android API level, where 21 represents the Android5.0.1.ResourcesThis article uses the Android NDK tool for cross-compiling, Google's official reference: Standalone toolchain, wh
Android development self-study note (Android Studio1.3.1)-2. Start the first Android Application, studio1.3.1androidI. Preface
Using Android Studio to develop Android applications is very simple, because it will help you automatically complete a lot of work. In this article,
Many open-source Android projects are recommended:Android learning Source Code
Address: http://www.cnblogs.com/TerryBlog/archive/2011/04/18/2019907.html
Http://blog.csdn.net/join_wangzi/article/details/8065227
Shares the source code of 45 Android instances, which is very powerful.Http://www.apkbus.com/android-20978-1-1.html
Andriod alarm source codeHttp://www.a
Hello everyone, this section is to share some of the Android image special effects processing tips, such as rounded corners, reflection, there is a picture scaling, drawable into bitmap,bitmap into drawable and so on.
Talk less, directly to explain today's example, this example is mainly to get wallpaper (Getwallpaper ()), and then some of the current wallpaper effects processing. Step by step:
The first step: a new
can be the interception of the image first compression, after all, the late still need to blur, that is, this image is compressed does not affect the fact that we are blurred (because to the end is blurred). In fact, when we compress the image, we find that the blur effect of the picture is different under the same blur radius, as shown in the following two figure:
The reason is: Gaussian fuzzy algorithm to determine the color of a point is through the point near the other points to obtain t
. This is a security mechanism. For Android, the final apk file contains the Dex type of file, Dex file is the class file repackaging, packaging rules are not simply compressed, but the class file inside the various function tables, variable table optimization, resulting in a new file, that is, Dex file. So loading this special class file requires a special ClassLoader dexclassloader.
Ii. the practical application of the Dexclassloader method
Suppos
1. Introduction to JNIJNI is all called Java Native Interface (Java Local call). Starting with Java1.1, JNI becomes part of the Java platform, which allows Java code to interact with code written in other languages, such as cc++. The concept of JNI was not introduced from Android.2. Jni and NDKIn short, the Android NDK offers a number of cross-compilation toolchain
For Android 2.1
| -- Makefile
| -- Bionic (bionic C Library)
| -- Bootable (startup guide code)
| -- Build (stores basic development kit configurations such as system compilation rules and generic)
| -- CTS (Android compatibility test suite Standard)
| -- Dalvik (Dalvik Java Virtual Machine)
| -- Development (related to application development)
| -- External (some open-source modules used by
configuration fileConfigure is required to compile the kernel. In general, there are many configure options, which we usually do not know. When the android simulator is running, there is a file/proc/config.gz, and config.gzis the configuration information file of the current kernel. We can obtain config.gz and decompress it under kernel. Git/(renamed as. config ):CD kernel. Git/Emulator ADB pull/proc/config.gzGunzip config.gzMV config. config
4. Mo
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