NDK r8d の時点で、これははるかに簡単な方法で解決できます。
<オール>次のディレクトリ階層でプロジェクトを作成します:
project/
jni/
Android.mk
Application.mk
*.c, *.cpp, *.h, etc.
Android.mk に次の内容を入力します。最も重要なのは最後の行です。他の変数の意味については、NDK のドキュメントを確認してください。
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.
project/
に移動します ディレクトリに移動し、入力するだけです
ndk-build
結果は project/libs/<arch>/name-of-your-executable
に配置されます .
http://www.bekatul.info/content/native-c-application-android [壊れた (2015 年 11 月 9 日)]
Wayback Machine リンク
記事を要約すると...
テスト コードは次のとおりです:
#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);
}
メイクファイルは次のとおりです:
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 [email protected] $< $(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 $(APP)
作成者はこれらのファイルを自分のローカル Linux コンピュータに保存しました:
/home/dd/android/dev/native/test.c
/home/dd/android/dev/native/Makefile
次に、著者はそれをコンパイルしてテストしました:
[email protected]:~/android/dev/native$ 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)!
使用された SDK と NDK は次のとおりです:
source code: /home/dd/android/dev/native
android ndk: /home/dd/android/android-ndk-r5
android sdk: /home/dd/android/android-sdk-linux_86
しかし、デバッグガイドは本当に良い部分でした!コピーして貼り付け ...
コンパイルを設定してデバッグを有効にします:
DEBUG = -g
CFLAGS := $(DEBUG) -fno-short-enums -I$(ANDROID_NDK_ROOT)/platforms/android-$(NDK_PLATFORM_VER)/arch-arm/usr/include
gdbserver ファイル ($(PREBUILD)/../gdbserver) をエミュレーターにコピーし、簡単にするために Makefile にターゲットを追加します。
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
次に、@ ポート 1234 でデバッグします:
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)
次に実行します:
[email protected]:~/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
他のコンソールを開き、デバッガーを実行します:
[email protected]:~/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) p i
$1 = 1
(gdb) n
9 printf("Hello, world (i=%d)!\n", i);
(gdb) p i
$2 = 3
(gdb) c
Continuing.
Program exited normally.
(gdb) quit
まあ大丈夫です。そして、他のコンソールは次のような追加の出力を提供します:
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
これは、KennyTM の回答に従うプロジェクトの例です。ゼロから作成することも、別のプロジェクトを変更することもできます (例:hello-jni
)。 NDK サンプルで。
jni/main.c:
#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.
stdout 出力にログが表示されないことに注意する必要があります。 adb logcat
を使用する必要があります。
ロギングが必要な場合:
jni/main.c:
#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;
}
および jni/Android.mk の対応するセクション になります:
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.