Let’s say that logcat show you the following crash log (this is from one of my projects): I/DEBUG ( 31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG ( 31): Build fingerprint: ‘generic/sdk/generic:2.3/GRH55/79397:eng/test-keys’ I/DEBUG ( 31): pid: 378, tid: 386 >>> com.example.gltest <<< I/DEBUG ( 31): … Read more
Me and my partner were able to purchase what we were looking for. We were on right path, you set keyValuePairs on the native side. Unfortunately I cannot publish the source because of the licensing restrictions from the company we had it written for us
It is possible. Here is some step by step: In $PROJECT_DIR/jni/Application.mk: APP_STL := stlport_static I tried using stlport_shared, but no luck. Same with libstdc++. In $PROJECT_DIR/jni/Android.mk: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := hello-jni LOCAL_SRC_FILES := hello-jni.cpp LOCAL_LDLIBS := -llog include $(BUILD_SHARED_LIBRARY) Nothing special here, but make sure your files are .cpp. In $PROJECT_DIR/jni/hello-jni.cpp: … Read more
that should get you started: Android Beginners: NDK Setup Step by Step and http://mobile.tutsplus.com/tutorials/android/ndk-tutorial/
The NDK (Native Development Kit) is a tool that allows you to program in C/C++ for Android devices. It’s intended to integrate with the SDK (it’s described as a “companion tool”) and used only for performance-critical portions of a project. See here for more information.
Here is how to solve this issue : add gradle.properties file to root folder of your project add ‘android.useDeprecatedNdk=true’ to gradle.properties file Here is my gradle.properties : # Project-wide Gradle settings. # IDE (e.g. Android Studio) users: # Gradle settings configured through the IDE *will override* # any settings specified in this file. # For … Read more
You can use the Android logging facilities: #include <android/log.h> #define APPNAME “MyApp” __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, “The value of 1 + 1 is %d”, 1+1); Make sure you also link against the logging library, in your Android.mk file: LOCAL_LDLIBS := -llog
Edit: From Jelly Bean onwards you can’t get the stack trace, because READ_LOGS went away. 🙁 I actually got a signal handler working without doing anything too exotic, and have released code using it, which you can see on github (edit: linking to historical release; I removed the crash handler since then). Here’s how: Use … Read more
There are a couple of things that can lead to “no implementation found”. One is getting the function prototype name wrong, another is failing to load the .so at all. Are you sure that System.loadLibrary() is being called before the method is used? If you don’t have a JNI_OnLoad function defined, you may want to … Read more
If it’s an object method, you need to pass the object to CallObjectMethod: jobject result = env->CallObjectMethod(obj, messageMe, jstr); What you were doing was the equivalent of jstr.messageMe(). Since your is a void method, you should call: env->CallVoidMethod(obj, messageMe, jstr); If you want to return a result, you need to change your JNI signature (the … Read more