Android NDK：使用预编译的静态库进行链接

Question

我正在尝试将 Jnetpcap 移植到 Android，以便使用它来解析 .pcap 文件。 Jnetpcap 是一个使用 JNI 的 libpcap 的 java 包装器。我已经使用 android 的源代码树将 libpcap 编译为静态库。

将 Jnetpcap 编译为共享库时出现错误，因为我必须与 libpcap.a 链接，但我不知道如何告诉 Android.mk 他必须与我拥有的 libpcap.a 文件链接.

使用“LOCAL_STATIC_LIBRARIES:= libpcap”将不起作用，因为 libpcap 在 android NDK 中默认不提供。

如果有人能帮助我，我将非常感激。

这是我当前的 Android.mk 文件：

include /home/sergio/workspace/MyApp/jni/libpcap/Android.mk

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

LOCAL_MODULE := jnetpcap

LOCAL_SRC_FILES :=\
    jnetpcap.cpp\
    packet_flow.cpp\
    packet_jheader.cpp\
    jnetpcap_pcap_header.cpp\
    nio_jbuffer.cpp\
    winpcap_stat_ex.cpp\
    winpcap_send_queue.cpp\
    winpcap_ext.cpp\
    jnetpcap_ids.cpp\
    jnetpcap_dumper.cpp\
    jnetpcap_utils.cpp\
    util_in_cksum.cpp\
    jnetpcap_beta.cpp\
    nio_jmemory.cpp\
    packet_jsmall_scanner.cpp\
    packet_protocol.cpp\
    nio_jnumber.cpp\
    packet_jheader_scanner.cpp\
    library.cpp\
    packet_jscan.cpp\
    jnetpcap_pcap100.cpp\
    util_checksum.cpp\
    packet_jpacket.cpp\
    winpcap_ids.cpp\
    jnetpcap_bpf.cpp

LOCAL_C_INCLUDES := /home/sergio/android-ndk-r5b/platforms/android-8/arch-arm/usr/include /home/sergio/workspace/Shark/jni/libpcap

LOCAL_STATIC_LIBRARIES := libpcap

include $(BUILD_SHARED_LIBRARY)

Answer 1

终于解决了。我的 Android.mk 代码：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE    := libpcap 
LOCAL_SRC_FILES := libpcap.a

include $(PREBUILT_STATIC_LIBRARY)


include $(CLEAR_VARS)

LOCAL_MODULE := jnetpcap

LOCAL_SRC_FILES :=\
    jnetpcap.cpp\
    packet_flow.cpp\
    packet_jheader.cpp\
    jnetpcap_pcap_header.cpp\
    nio_jbuffer.cpp\
    winpcap_stat_ex.cpp\
    winpcap_send_queue.cpp\
    winpcap_ext.cpp\
    jnetpcap_ids.cpp\
    jnetpcap_dumper.cpp\
    jnetpcap_utils.cpp\
    util_in_cksum.cpp\
    jnetpcap_beta.cpp\
    nio_jmemory.cpp\
    packet_jsmall_scanner.cpp\
    packet_protocol.cpp\
    nio_jnumber.cpp\
    packet_jheader_scanner.cpp\
    library.cpp\
    packet_jscan.cpp\
    jnetpcap_pcap100.cpp\
    util_checksum.cpp\
    packet_jpacket.cpp\
    winpcap_ids.cpp\
    jnetpcap_bpf.cpp

LOCAL_C_INCLUDES :=\
    /home/sergio/android-ndk-r5b/platforms/android-8/arch-arm/usr/include\
    /home/sergio/workspace/MyApp/jni/libpcap

LOCAL_STATIC_LIBRARIES := libpcap

include $(BUILD_SHARED_LIBRARY)

Answer 2

您必须将 pcap 构建为静态模块。像这样的

include $(CLEAR_VARS)
LOCAL_MODULE := pcap
LOCAL_CFLAGS := declare_flags
LOCAL_C_INCLUDES := declare_include
LOCAL_SRC_FILES := src_files
include $(BUILD_STATIC_LIBRARY)

此构建 pcap 作为本地模块，您可以与 LOCAL_STATIC_LIBRARIES 链接

只需添加

LOCAL_STATIC_LIBRARIES := pcap

打电话之前

include $(BUILD_SHARED_LIBRARY)