在机器人工作室JNI文件夹 [英] JNI folder in Android Studio

问题描述

我试图使机器人工作室helloy-JNI应用程序，我有例外

I am trying make helloy-jni app in Android Studio and I have exception

06-27 13:17:19.099  12714-12714/com.example.testjni2           E/AndroidRuntime: FATAL EXCEPTION: main
    java.lang.ExceptionInInitializerError
    at java.lang.Class.newInstanceImpl(Native Method)
    at java.lang.Class.newInstance(Class.java:1319)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1071)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2166)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2299)
    at android.app.ActivityThread.access$700(ActivityThread.java:154)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5306)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.UnsatisfiedLinkError: Couldn't load hello-jni from loader dalvik.system.PathClassLoader[dexPath=/data/app/com.example.testjni2-1.apk,libraryPath=/data/app-lib/com.example.testjni2-1]: findLibrary returned null
    at java.lang.Runtime.loadLibrary(Runtime.java:365)
    at java.lang.System.loadLibrary(System.java:535)
    at com.example.testjni2.MainActivity.<clinit>(MainActivity.java:9)
    ... 15 more

我的项目结构看起来像这样

My structure project looks like this

我说我build.gradle行：

I added my build.gradle line:

   compile files('libs/armeabi/libhello-jni.so')

但是，这并不帮助。 我读摇篮和的 Android的摇篮插件的，但我没有找到关于使用JNI文件夹操作的更多信息

But this don't helped. I read Gradle and Android Gradle plugin, but I don't find information about working with jni folder

我在想什么<一个href="http://www.gradle.org/docs/current/userguide/dependency_management.html#sub%3afile_dependencies">file依赖的，但它是不工作

I am thinking what it file dependencies, but it isn't working

我的HELLO-jni.c文件includ

My hello-jni.c file includ

jstring  Java_com_example_testjni2_MainActivity_stringFromJNI (JNIEnv *env, jobject thiz){
    return (*env)->NewStringUTF(env, "Hello from JNI !");
  }

我的MainActivity文件包括：

My MainActivity file include

public class MainActivity extends Activity {
    static {
        System.loadLibrary("hello-jni");
    }
    public native String  stringFromJNI();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String text = stringFromJNI();
        Log.i("MainActivity", text);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

我的Andr​​oid.mk文件containts

My Android.mk file containts

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE    := hello-jni
LOCAL_SRC_FILES := hello-jni.c

include $(BUILD_SHARED_LIBRARY)

你告诉我，请，在那里我可以犯了一个错误。

Tell me, please, where I could make a mistake.

Android的工作室0.1.7 操作系统 - Windows 7的64

Android Studio 0.1.7 OS - Windows 7 x64

推荐答案

的摇篮构建系统不支持的时刻捆绑本机库。检查<一href="https://groups.google.com/d/msg/adt-dev/nQobKd2Gl_8/Z5yWAvCh4h4J">https://groups.google.com/d/msg/adt-dev/nQobKd2Gl_8/Z5yWAvCh4h4J对于一些自定义任务你需要添加到您的build.gradle。

The gradle build system does not support bundling native libraries at the moment. Check https://groups.google.com/d/msg/adt-dev/nQobKd2Gl_8/Z5yWAvCh4h4J for some custom tasks you'd need to add to your build.gradle.

请注意，这是一个临时的解决方法，直到摇篮支持本地建设项目。

Note that this is a temporary workaround until gradle supports building native projects.

这篇关于在机器人工作室JNI文件夹的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！