Can't print log messages from JNI with Android Studio

Question

Error I\'m getting:

error: undefined reference to \'__android_log_print\'

I\'ve already added this line to my .cpp file:

Answer 1

I use Gradle 2.5 with Android Studio 1.4.1 and it works for me with this syntax:

ldLibs += "log"

The model build.gradle should be something similar:

apply plugin: 'com.android.model.application'

    model{
        android {
            compileSdkVersion = 23
            buildToolsVersion = "23.0.1"

            defaultConfig.with {
                applicationId = "com.local.some.project"
                minSdkVersion.apiLevel = 17
                targetSdkVersion.apiLevel = 23
                versionCode = 1
                versionName = "1.0"
            }
        }

        android.buildTypes {
            release {
                minifyEnabled = false
                proguardFiles += file('proguard-rules.pro')
            }
        }

        android.ndk {
            moduleName = "MyModel"
            ldLibs += "log"
        }

        compileOptions.with {
            sourceCompatibility = JavaVersion.VERSION_1_7
            targetCompatibility = JavaVersion.VERSION_1_7
        }
    }

    dependencies {
        compile fileTree(include: ['*.jar'], dir: 'libs')
        compile 'com.android.support:appcompat-v7:23.0.1'
        compile files('libs/some3rdParty.jar')
    }
    

Answer 2

ADD this in Your android.mk file

LOCAL_LDLIBS := -llog -ljnigraphics

Answer 3

It seems that using Gradle + Android Studio the Android.mk file is ignored.

As explained here, try adding the following directive to your build.gradle:

android {
    defaultConfig {
        ndk {
            moduleName "modulename"
            ldLibs "log"
        }
    }
}