![]() _android_log_print(ANDROID_LOG_INFO, TAG, ” Trying to connect”) set the connection parameters (who to connect to) S = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM) _android_log_print(ANDROID_LOG_INFO, TAG, “rfcomm %s”, dest) Jint Java_com_bluetooth_RSSI_connectbt(JNIEnv* env, jobject this, jstring mac)ĭest = (*env)->GetStringUTFChars(env, mac, 0) I copied all the needed header files into build path and libbluetooth.so too, rooted my phone using z4root and granted superuser rights to the app using “Process p=Runtime.getRuntime().exec(“su”) ”(so my app asked for superuser rights and I granted it to it), but I couldn’t connect to any device so far using this code for connection: I managed to build my project using ndk r5b, and I see the logs written in my C code, so the building is complete I think, but every time I want to connect to a device, my phone returns “can’t connect’. I’m trying to write an application that reads the rssi value of a connection, but I have difficulties connecting to the phone using MAC address. Now using Eclipse, you can build the Java android project, and it will include the JNI part automatically. The C files have been successfully built. java files) in:įor these paths always use forward slashes.ĥ.3) Open Cygwin and browse to the NDK folder, using cd :ĥ.4) Type. h and Android.mk files) in:ī) The JAVA part (assets,bin,gen,jni,libs,obj,res,src with the. The project must be organized as follows:Ī) The JNI part (the. The path in the config, d:/work_code/android/BlueInput, is something I’m currently working on. Set NDK_PROJECT_PATH=/cygdrive/d/work_code/android/BlueInput Set ANDROID_NDK_ROOT=/cygdrive/d/work_code/android-ndk-r4b Set PATH=D:/work_code/android/android-sdk-windows/tools D:/work_code/android/android-ndk-r4b Set CLASSPATH=d:/work_code/android/BlueInput/obj Set DEV_ROOT=d:/work_code/android/BlueInput Go to the Cygwin folder and open Cygwin.bat. My choice is: D:\work_code\android\android-ndk-r4b\ This step takes a few minutes.ĥ.1) Unzip the NDK zip file. The installer will download the packages from the internet, and might prompt you to accept terms, which you must do if you want to continue with the installation. Go to Settings and check the “Force …” checkbox:Ĥ.5) Go to Available Packages, select all, and press Install Selected: This opens the Android SDK and AVD Manager. It takes a few minutes to complete.Ĥ.4) Re-run the SDK Setup.exe from the Android SDK. Current file is: jdk-6u21-windows-i586.exe ( Direct link)Ĥ.3) Install the Java JDK: simply run the exe. I choose:ĭ:\work_code\android\android-sdk-windows\ 3) Download the latest Android SDK for WindowsĬurrent version is android-sdk_r06-windows.zip 23MBĤ.1) Unzip the zip content to a location on your harddisk.On package selection, Open Devel category and check “make”: Select the mirror you need to download from then follow the installation guide. 1) Download the Android NDK for WindowsĬurrent version of the file is: android-ndk-r4b-windows.zip 45MB.You will need an internet connection to install Cygwin and the Android SDK automatically from the Internet. ![]() Install Android NDK on Windows and use it to compile a JAVA/JNI application It proved an easy task, but there were some issues, so I decided to write this guide. However, I also needed to be able to compile JNI Android apps using the Windows environment. Since most of the NDK tools are coming from the Linux environment, that OS was my first approach in building native C applications for Android.
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