我如何构build一个本机（命令行）可执行文件在Android上运行？
我已经成功构build了一个使用本地（JNI）库的Android应用程序（GUI）。
但是，现在我想创build一个从命令行运行的可执行文件（root权限），根本不使用GUI。 我如何build立这样的东西？
从NDK r8d开始，这可以用更简单的方法解决。
-
创build一个具有以下目录层次结构的项目：
project/ jni/ Android.mk Application.mk *.c, *.cpp, *.h, etc. -
用以下内容填写Android.mk。 最重要的是最后一行。 检查NDK文档的其他variables的含义。
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := name-of-your-executable LOCAL_SRC_FILES := a.cpp b.cpp c.cpp etc.cpp LOCAL_CPPFLAGS := -std=gnu++0x -Wall -fPIE # whatever g++ flags you like LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog -fPIE -pie # whatever ld flags you like include $(BUILD_EXECUTABLE) # <-- Use this to build an executable. -
转到
project/目录，只需键入ndk-build结果将放置在
project/libs/<arch>/name-of-your-executable。
http://www.bekatul.info/content/native-c-application-android [破碎（2015年11月9日）]
总结文章…
testing代码是：
#include <stdio.h>//for printf #include <stdlib.h>//for exit int main(int argc, char **argv) { int i = 1; i+=2; printf("Hello, world (i=%d)!\n", i); return 0; exit(0); }
Makefile是：
APP := test ROOT := /home/dd/android INSTALL_DIR := /data/tmp NDK_PLATFORM_VER := 8 ANDROID_NDK_ROOT := $(ROOT)/android-ndk-r5 ANDROID_NDK_HOST := linux-x86 ANDROID_SDK_ROOT := $(ROOT)/android-sdk-linux_86 PREBUILD := $(ANDROID_NDK_ROOT)/toolchains/arm-eabi-4.4.0/prebuilt/$(ANDROID_NDK_HOST) BIN := $(PREBUILD)/bin/ LIB := $(ANDROID_NDK_ROOT)/platforms/android-$(NDK_PLATFORM_VER)/arch-arm/usr/lib INCLUDE := $(ANDROID_NDK_ROOT)/platforms/android-$(NDK_PLATFORM_VER)/arch-arm/usr/include CC := $(BIN)/arm-eabi-gcc GDB_CLIENT := $(BIN)/arm-eabi-gdb LIBCRT := $(LIB)/crtbegin_dynamic.o LINKER := /system/bin/linker DEBUG := -g CFLAGS := $(DEBUG) -fno-short-enums -I$(INCLUDE) CFLAGS += -Wl,-rpath-link=$(LIB),-dynamic-linker=$(LINKER) -L$(LIB) CFLAGS += -nostdlib -lc all: $(APP) $(APP): $(APP).c $(CC) -o $@ $< $(CFLAGS) $(LIBCRT) install: $(APP) $(ANDROID_SDK_ROOT)/platform-tools/adb push $(APP) $(INSTALL_DIR)/$(APP) $(ANDROID_SDK_ROOT)/platform-tools/adb shell chmod 777 $(INSTALL_DIR)/$(APP) shell: $(ANDROID_SDK_ROOT)/platform-tools/adb shell run: $(ANDROID_SDK_ROOT)/platform-tools/adb shell $(INSTALL_DIR)/$(APP) debug-install: $(ANDROID_SDK_ROOT)/platform-tools/adb push $(PREBUILD)/../gdbserver $(INSTALL_DIR)/gdbserver $(ANDROID_SDK_ROOT)/platform-tools/adb shell chmod 777 $(INSTALL_DIR)/gdbserver debug-go: $(ANDROID_SDK_ROOT)/platform-tools/adb forward tcp:1234: tcp:1234 $(ANDROID_SDK_ROOT)/platform-tools/adb shell $(INSTALL_DIR)/gdbserver :1234 $(INSTALL_DIR)/$(APP) debug: $(GDB_CLIENT) $(APP) clean: @rm -f $(APP).o $(APP)
作者将这些文件存储在他/她的本地Linux计算机上：
/home/dd/android/dev/native/test.c /home/dd/android/dev/native/Makefile
作者然后编译和testing它：
dd@abil:~/android/dev/native$ make clean; make; make install; make run /home/dd/android/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86/bin//arm-eabi-gcc -c -fno-short-enums -I/home/dd/android/android-ndk-r5/platforms/android-9/arch-arm/usr/include test.c -o test.o /home/dd/android/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86/bin//arm-eabi-g++ -Wl,--entry=main,-dynamic-linker=/system/bin/linker,-rpath-link=/home/dd/android/android-ndk-r5/platforms/android-9/arch-arm/usr/lib -L/home/dd/android/android-ndk-r5/platforms/android-9/arch-arm/usr/lib -nostdlib -lc -o test test.o /home/dd/android/android-sdk-linux_86/platform-tools/adb push test /data/tmp/test 45 KB/s (2545 bytes in 0.054s) /home/dd/android/android-sdk-linux_86/platform-tools/adb shell chmod 777 /data/tmp/test /home/dd/android/android-sdk-linux_86/platform-tools/adb shell /data/tmp/test Hello, world (i=3)!
使用的SDK和NDK是：
source code: /home/dd/android/dev/native android ndk: /home/dd/android/android-ndk-r5 android sdk: /home/dd/android/android-sdk-linux_86
但是，debugging指南是非常好的一部分！ 复制并粘贴…
设置编译为启用debugging：
DEBUG = -g CFLAGS := $(DEBUG) -fno-short-enums -I$(ANDROID_NDK_ROOT)/platforms/android-$(NDK_PLATFORM_VER)/arch-arm/usr/include
将gdbserver文件（$（PREBUILD）/../ gdbserver）复制到模拟器中，在Makefile中添加目标比简单：
debug-install: $(ANDROID_SDK_ROOT)/platform-tools/adb push $(PREBUILD)/../gdbserver $(INSTALL_DIR)/gdbserver $(ANDROID_SDK_ROOT)/platform-tools/adb shell chmod 777 $(INSTALL_DIR)/gdbserver
现在我们将debugging它@端口1234：
debug-go: $(ANDROID_SDK_ROOT)/platform-tools/adb forward tcp:1234: tcp:1234 $(ANDROID_SDK_ROOT)/platform-tools/adb shell $(INSTALL_DIR)/gdbserver :1234 $(INSTALL_DIR)/$(APP)
然后执行它：
dd@abil:~/android/dev/native$ make clean; make; make install; make debug-install; make debug-go /home/dd/android/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86/bin//arm-eabi-gcc -c -g -fno-short-enums -I/home/dd/android/android-ndk-r5/platforms/android-9/arch-arm/usr/include test.c -o test.o /home/dd/android/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86/bin//arm-eabi-g++ -Wl,--entry=main,-dynamic-linker=/system/bin/linker,-rpath-link=/home/dd/android/android-ndk-r5/platforms/android-9/arch-arm/usr/lib -L/home/dd/android/android-ndk-r5/platforms/android-9/arch-arm/usr/lib -nostdlib -lc -o test test.o /home/dd/android/android-sdk-linux_86/platform-tools/adb push test /data/tmp/test 71 KB/s (3761 bytes in 0.051s) /home/dd/android/android-sdk-linux_86/platform-tools/adb shell chmod 777 /data/tmp/test /home/dd/android/android-sdk-linux_86/platform-tools/adb push /home/dd/android/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86/../gdbserver /data/tmp/gdbserver 895 KB/s (118600 bytes in 0.129s) /home/dd/android/android-sdk-linux_86/platform-tools/adb shell chmod 777 /data/tmp/gdbserver /home/dd/android/android-sdk-linux_86/platform-tools/adb forward tcp:1234: tcp:1234 /home/dd/android/android-sdk-linux_86/platform-tools/adb shell /data/tmp/gdbserver :1234 /data/tmp/test Process /data/tmp/test created; pid = 472 Listening on port 1234
现在打开其他控制台并执行debugging器：
dd@abil:~/android/dev/native$ make debug /home/dd/android/android-ndk-r5/toolchains/arm-eabi-4.4.0/prebuilt/linux-x86/bin//arm-eabi-gdb test GNU gdb 6.6 Copyright (C) 2006 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "--host=x86_64-linux-gnu --target=arm-elf-linux"... (gdb) target remote :1234 Remote debugging using :1234 warning: Unable to find dynamic linker breakpoint function. GDB will be unable to debug shared library initializers and track explicitly loaded dynamic code. 0xb0001000 in ?? () (gdb) b main Breakpoint 1 at 0x82fc: file test.c, line 6. (gdb) c Continuing. Error while mapping shared library sections: /system/bin/linker: No such file or directory. Error while mapping shared library sections: libc.so: Success. Breakpoint 1, main (argc=33512, argv=0x0) at test.c:6 6 int i = 1; (gdb) n 7 i+=2; (gdb) pi $1 = 1 (gdb) n 9 printf("Hello, world (i=%d)!\n", i); (gdb) pi $2 = 3 (gdb) c Continuing. Program exited normally. (gdb) quit
那好吧。 另一个控制台将提供额外的输出，如下所示：
Remote debugging from host 127.0.0.1 gdb: Unable to get location for thread creation breakpoint: requested event is not supported Hello, world (i=3)! Child exited with retcode = 0 Child exited with status 0 GDBserver exiting
下面是一个遵循KennyTM答案的示例项目。 您可以从头创build或修改其他项目，例如NDK示例中的hello-jni 。
JNI / main.c中：
#include <stdio.h> int main() { printf("hello\n"); return 0; }
JNI / Application.mk：
#APP_ABI := all APP_ABI := armeabi-v7a
JNI / Android.mk：
LOCAL_PATH := $(call my-dir) # first target: the hello-jni example # it shows how to build multiple targets # {{ you may comment it out include $(CLEAR_VARS) LOCAL_MODULE := hello-jni LOCAL_SRC_FILES := hello-jni.c LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/lib -lmystuff # link to libmystuff.so include $(BUILD_SHARED_LIBRARY) #}} you may comment it out # second target include $(CLEAR_VARS) LOCAL_MODULE := hello LOCAL_SRC_FILES := main.c include $(BUILD_EXECUTABLE) # <-- Use this to build an executable.
我必须注意，你不会看到在标准输出的任何日志logging，你将不得不使用adb logcat来看看它。
所以，如果你想logging：
JNI / main.c中：
#include <stdio.h> #include <android/log.h> int main() { printf("hello\n"); __android_log_print(ANDROID_LOG_DEBUG , "~~~~~~", "log %i", 0); // the 3rd arg is a printf-style format string return 0; }
和jni / Android.mk中的相应部分变成：
LOCAL_PATH := $(call my-dir) #... include $(CLEAR_VARS) LOCAL_MODULE := hello LOCAL_SRC_FILES := main.c LOCAL_LDLIBS := -llog # no need to specify path for liblog.so include $(BUILD_EXECUTABLE) # <-- Use this to build an executable.
因为我没有50的声望，我不能评论Someone Somewhere的答案，所以我在这里做一个答案。
我想引用一个错误/ misprecision：就gdbserver而言，adb命令
$(ANDROID_SDK_ROOT)/platform-tools/adb push $(PREBUILD)/../gdbserver $(INSTALL_DIR)/gdbserver
由于显而易见的原因，将永远无法工作，因为“目录$（PREBUILD）和gdbserver之间存在目录android-arm。 最好设置一下
PREBUILDDEBUG=$(ANDROID_NDK_ROOT)/prebuilt/android-arm
并取代以前的命令
$(ANDROID_SDK_ROOT)/platform-tools/adb push $(PREBUILDDEBUG)/gdbserver $(INSTALL_DIR)/gdbserver
有了这一切都适用于我的Android虚拟设备。 （没有分段错误明显。）在我的真实设备上，我确实有分段错误。 那是
make run
部分。 对于debugging部分，无论是在仿真器还是在真实的设备上，当我做这些事情时，我总是会得到一个“无法访问内存”
b main
在gdb模式…任何想法？ 帮助将不胜感激。
