Android studio 使用Gradle的Android Studio中出现不满意的链接错误

我最近从Eclipse迁移到Android Studio，在访问本机函数时遇到了一些问题。调用的第一个本机函数是nativeClassInit。关于这个问题，我看到的大部分内容都涉及缺少的静态标识符，但我已将其包含在MainActivity.java中。我已经试了几天了，已经没有主意了。非常感谢您的任何建议

System.loadLibrary函数不返回null，当我运行adb shell ls-l package/name/path/lib时，我可以看到应用程序的*.so文件：

-rwxr-xr-x system   system       5096 2015-03-27 18:32 libPixa.so
-rwxr-xr-x system   system     775728 2015-03-27 18:32 libgnustl_shared.so
-rwxr-xr-x system   system   24998736 2015-03-26 15:01 libgstreamer_android.so

我对Gradle非常陌生，因此请随意批评我的build.Gradle文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 18
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.sbimagingsystems.pixa"
        minSdkVersion 14
        targetSdkVersion 19

        ndk {
            moduleName "gstreamer_android" // Name of C++ module (i.e. libSeePlusPlus)
            moduleName "Pixa"
            cFlags "-std=c++11 -fexceptions" // Add provisions to allow C++11 functionality
            stl "gnustl_shared" // Which STL library to use: gnustl or stlport

        }
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }

    sourceSets {
        main {
            manifest.srcFile 'src/main/AndroidManifest.xml'
            java.srcDir 'src'
            res.srcDir 'res'
            assets.srcDir 'assets'

            jniLibs.srcDir 'src/main/libs'
            jni.srcDirs = ['src/main/jni']      // location of native code files
            //jniLibs.srcDirs = ['jniLibs']
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:19.0.0'
    compile files('libs/acra-4.5.0.jar')
    compile files('libs/dropbox-android-sdk-1.5.4.jar')
    compile files('libs/httpmime-4.0.3.jar')
    compile files('libs/json_simple-1.1.jar')
    compile files('libs/pinchzoom.jar')
    compile files('libs/universal-image-loader-1.8.7-snapshot-with-sources.jar')
}

本地物业：

gst.dir=/home/android-dev/AndroidDev/Installation/gstreamer
sdk.dir=/home/android-dev/Android/Sdk
ndk.dir=/home/android-dev/AndroidDev/Installation/android-ndk-r9c

MainActivity.java

public class MainActivity extends FragmentActivity implements
        SurfaceHolder.Callback, OnClickListener, OnItemClickListener
{

    private native void nativeInit(); // Initialize native code, build pipeline,
    // etc

    private native void nativeFinalize(); // Destroy pipeline and shutdown
    // native code

    private native void nativePlay(); // Set pipeline to PLAYING

    public native void nativePause(); // Set pipeline to PAUSED

    private static native boolean nativeClassInit(); // Initialize native class:
    // cache Method IDs for
    // callbacks

    // more code

    static
    {
        System.loadLibrary("Pixa");
        System.loadLibrary("gstreamer_android");

        nativeClassInit();
    }
}

Pixa.c：

/* List of implemented native methods */
static JNINativeMethod native_methods[] = {
  { "nativeInit", "()V", (void *) gst_native_init},
  { "nativeFinalize", "()V", (void *) gst_native_finalize},
  { "nativePlay", "()V", (void *) gst_native_play},
  { "nativePause", "()V", (void *) gst_native_pause},
  { "nativeSurfaceInit", "(Ljava/lang/Object;)V", (void *) gst_native_surface_init},
  { "nativeSurfaceFinalize", "()V", (void *) gst_native_surface_finalize},
  { "nativeClassInit", "()Z", (void *) gst_native_class_init},
  { "nativeStartRecord", "()V", (void *) gst_native_record_start},
  { "nativeStopRecord", "()V", (void *) gst_native_record_stop}
};

/* Library initializer */
jint JNI_OnLoad(JavaVM *vm, void *reserved) {
  JNIEnv *env = NULL;

  java_vm = vm;

  if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK) {
    __android_log_print (ANDROID_LOG_ERROR, "Receiver", "Could not retrieve JNIEnv");
    return 0;
  }
  jclass klass = (*env)->FindClass (env, "com/sbimagingsystems/pixa/MainActivity");
  (*env)->RegisterNatives (env, klass, native_methods, G_N_ELEMENTS(native_methods));

  pthread_key_create (&current_jni_env, detach_current_thread);
  return JNI_VERSION_1_4;
}

最后，LogCat：

02-27 18:06:41.799    8248-8248/com.sbimagingsystems.pixa E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.sbimagingsystems.pixa, PID: 8248
java.lang.UnsatisfiedLinkError: Native method not found: com.sbimagingsystems.pixa.MainActivity.nativeClassInit:()Z
        at com.sbimagingsystems.pixa.MainActivity.nativeClassInit(Native Method)
        at com.sbimagingsystems.pixa.MainActivity.<clinit>(MainActivity.java:3197)
        at java.lang.Class.newInstanceImpl(Native Method)
        at java.lang.Class.newInstance(Class.java:1208)
        at android.app.Instrumentation.newActivity(Instrumentation.java:1067)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2247)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
        at android.app.ActivityThread.access$900(ActivityThread.java:169)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1277)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5479)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
        at dalvik.system.NativeStart.main(Native Method)

使用

---

禁用Android studio自动生成NDK。而是在命令行上使用ndk构建。这将生成您的.so文件并能够正确链接/

谢谢您的回答。我试过了，当运行ndk构建时，我得到了一个错误：android/native\u window.h：没有这样的文件或目录。不确定为什么找不到标题

jni.srcDirs = [] //disable automatic ndk-build call