native-code

I have a requirement for creating call backs between native code ( c language code) and Android code . I wrote JNI functions for calling C code from the android like this JNI code here #include <android/log.h> void initSocket(); #ifdef __cplusplus extern "C" { #endif JNIEXPORT void JNICALL Java_org_pjsip_pjsua_pjsua_1appJNI_initSocket(JNIEnv *jenv, jclass jcls) { __android_log_write(ANDROID_LOG_INFO, " JNI CODE ", " APP INIT SOCKET"); initSocket(); } } C code looks like this void initSocket() { /// some more stuff printf(" initSocket function "); } static int worker_thread(void *unused) { ///

This question already has an answer here: How to see the source of Built-in javascript functions? [closed] 1 answer where can I find the source code of native js functions, for example I want to look at eval() function In the JavaScript engine's source code. Both Chrome and Firefox are open source and you can look at the implementation of any part of the javascript engine in the source code for those products. Other browsers have their own implementation (like IE) that is not available to the public to look at. The Chrome v8 javascript engine is here: http://code.google.com/p/v8/ The Firefox

The Android NDK has just been significantly expanded to include support for writing android applications entirely in native C/C++ code. One can now capture input events on the keyboard and touch screen using native code, and also implement the application lifecycle in C/C++ using the new NativeActivity class. Given all the expanded native capabilities, would it be worthwhile to completely bypass Java and write Android application in native code? The NDK is not native per-se. It is to a large extent a JNI wrapper around the Android SDK. Using NativeActivity gives you a convenient way of dealing

This question already has an answer here: Listen to own application uninstall event on Android 3 answers Recently i've seen a funny app - Photo Wonder. When this app is uninstalled, it shows a web survey page asking for the reason of app uninstall. Now, here is the problem. As far as I know, after an app has been removed, the system broadcasts ACTION_PAKAGE_REMOVED intent. But this funny app was able to show my the web page although the official doc says "The package that is being installed does not receive this Intent." Anyhow, I could find a process checking some kind of status of the app.

A piece of C/C++ code could provide a JNI method with an array of function pointers. But is there a way to call to the stack the functions that array's pointers are pointing to, directly from inside Java code (without using JNI or similar)? JNI somehow does something like that, so there must be a way. How does JNI do it? Is it via sun.misc.Unsafe? Even if it is not, could we use some Unsafe workaround to get our hands on the JVM code that does that? I don't plan to use that commercially of course. I'm not even a professional, I just really enjoy coding and I've been studying CUDA lately so I

I am developing audio player in android. So i want to add the details of the playing song i.e. Artist Name, Duration, Bit rate and sampling frequency. I can get Artist Name and duration of a music file by using MediaStore.Audio.Media library . But i am unable to get Bit rate and sampling frequency of the same file. So how can i get the same? As i know, it can be done by using native library. But don't know how? So anyone can help me on this? You can approximate it by dividing the file size by the length of the audio in seconds, for instance, from a random AAC encoded M4A in my library: File