CODEWITHSUNDEEP
javaandroid
user3136235
user3136235

Reputation: 103

I am using __android_log_print and not able to print the log messages on logcat

This is the .cpp file and the code is

JNIEXPORT jint JNICALL Java_com_example_compute_MainActivity_AddNumbers(JNIEnv *env, jobject obj, jint v1, jint v2)
{
_android_log_print(ANDROID_LOG_VERBOSE, "VaxVoIP", "The value of 1 + 1 is %d", 1+1);

         return -1;

    //return (v1 + v2);
}

This is the Android.mk file 

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

Here we give our module name and source file(s)

LOCAL_MODULE    := add
LOCAL_LDLIBS := -llog
LOCAL_SRC_FILES := add.cpp\
                   add.h\

include $(BUILD_SHARED_LIBRARY)

And the other error that I'm trying to solve is while making the .so file 

_android_log_print(ANDROID_LOG_VERBOSE, "VaxVoIP", "The value of 1 + 1 is %d", 1+1);
was not declared in this scope

Upvotes: 3

Views: 4950

Answers (4)

Schmerzmittel
Schmerzmittel

Reputation: 40

It's probably because of the buffer. Put \n at the end of the string.

__android_log_print(ANDROID_LOG_VERBOSE, "VaxVoIP", "The value of 1 + 1 is %d\n", 1+1);

Also don't forget to put double underscores rather than one single underscore.

Upvotes: 0

Antzi
Antzi

Reputation: 13444

Don't forget to include 

#include <android/log.h>

Upvotes: 0

Wahib Ul Haq
Wahib Ul Haq

Reputation: 4415

John is right about it. I just got it resolved by including #include <android/log.h>and also add LOCAL_LDLIBS += -llog -ldl -landroid in android.mk file

Upvotes: 1

John Visosky
John Visosky

Reputation: 235

If that's the whole .cpp file, you're going to need to #include something that defines _android_log_print.

Upvotes: 0

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