Android Gstreamer Ndk生成错误

我想在我的android手机上使用gstreamer，但我在运行ndk build时遇到了这些错误，尽管我已经阅读了add-pthread

任何人都知道如何解决这个问题，我在我的ubuntu电脑上构建了这个

• Android.mk

  LOCAL_PATH := $(call my-dir)
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE    := test_lib
  LOCAL_SRC_FILES := test_gst.cpp
  LOCAL_SHARED_LIBRARIES := gstreamer_android
  LOCAL_LDLIBS := -llog -landroid -pthread
  include $(BUILD_SHARED_LIBRARY)
  
  ifndef GSTREAMER_SDK_ROOT
  ifndef GSTREAMER_SDK_ROOT_ANDROID
  $(error GSTREAMER_SDK_ROOT_ANDROID is not defined!)
  endif
  GSTREAMER_ROOT        := $(GSTREAMER_SDK_ROOT_ANDROID)
  endif
  GSTREAMER_NDK_BUILD_PATH  := $(GSTREAMER_ROOT)/share/gst-android/ndk-build
  
  include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer-1.0.mk
  

• 错误

  The list of GSTREAMER_PLUGINS is empty"
  GStreamer      : [GEN] => gst-build-armeabi-v7a/gstreamer_android.c
  GStreamer      : [COMPILE] => gst-build-armeabi-v7a/gstreamer_android.c
  GStreamer      : [LINK] => gst-build-armeabi-v7a/libgstreamer_android.so
  gstinfo.c:1885: error: undefined reference to 'dladdr'
  gwakeup.c:146: error: undefined reference to 'eventfd'
  glib-unix.c:98: error: undefined reference to 'pipe2'
  gthread-posix.c:444: error: undefined reference to 'pthread_rwlock_init'
  gthread-posix.c:453: error: undefined reference to 'pthread_rwlock_destroy'
  gthread-posix.c:652: error: undefined reference to 'pthread_condattr_init'
  gthread-posix.c:669: error: undefined reference to 'pthread_condattr_destroy'
  gthread-posix.c:453: error: undefined reference to 'pthread_rwlock_destroy'
  gthread-posix.c:543: error: undefined reference to 'pthread_rwlock_wrlock'
  gthread-posix.c:561: error: undefined reference to 'pthread_rwlock_trywrlock'
  gthread-posix.c:581: error: undefined reference to 'pthread_rwlock_unlock'
  gthread-posix.c:600: error: undefined reference to 'pthread_rwlock_rdlock'
  gthread-posix.c:618: error: undefined reference to 'pthread_rwlock_tryrdlock'
  gthread-posix.c:638: error: undefined reference to 'pthread_rwlock_unlock'
  ./bindtextdom.c:312: error: undefined reference to 'pthread_rwlock_unlock'
  ./bindtextdom.c:91: error: undefined reference to 'pthread_rwlock_wrlock'
  ./bindtextdom.c:91: error: undefined reference to 'pthread_rwlock_wrlock'
  ./loadmsgcat.c:1287: error: undefined reference to 'pthread_rwlock_init'
  ./textdomain.c:73: error: undefined reference to 'pthread_rwlock_wrlock'
  ./textdomain.c:117: error: undefined reference to 'pthread_rwlock_unlock'
  ./dcigettext.c:1016: error: undefined reference to 'pthread_rwlock_rdlock'
  ./dcigettext.c:530: error: undefined reference to 'pthread_rwlock_rdlock'
  ./finddomain.c:87: error: undefined reference to 'pthread_rwlock_rdlock'
  collect2: error: ld returned 1 exit status
  make: *** [buildsharedlibrary_armeabi-v7a] Error 1
  

• 解决方案：

  android update project --name testing_2 --target 1 --path  /home/username/AndroidStudioProjects/testing_2/app/src/main/
  

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• 错误（当我在手机上运行android应用程序时）

但是我看到了libgstreamer_android.so在那个文件夹里 然后在加载libtest_lib之前，我尝试使用System.loadlibrary（“gstreamer_android”）

然后我得到了这些：

FATAL EXCEPTION: main
E/AndroidRuntime: Process: com.example.flowenol.testing_2, PID: 20447
E/AndroidRuntime: java.lang.NoClassDefFoundError:org/freedesktop/gstreamer/GStreamer

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看，你也可能错过了android更新…谢谢alex，我通过android更新修复了错误，但我在运行android应用程序时出错了…你应该写loadLibrary（“gstreamer_android”），没有lib前缀。我知道，我只是忘了写这里，但我写System.loadLibrary（“gstreamer_android”）；在我的代码中…谢谢alex，我通过将[org/freedesktop/gstreamer/gstreamer.java]复制到[main/java]来修复它

FATAL EXCEPTION: main
E/AndroidRuntime: Process: com.example.flowenol.testing_2, PID: 20447
E/AndroidRuntime: java.lang.NoClassDefFoundError:org/freedesktop/gstreamer/GStreamer