Question

我正在尝试将libbmp库作为共享库移植到Android。我的Android项目在jni文件夹下包含以下内容：

Android.mk（热门Android makefile）

LOCAL_PATH := $(call my-dir)
include $(call all-subdir-makefiles)

libbmp

Android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE    := libbmp
LOCAL_SRC_FILES := bmpfile.c
include $(BUILD_SHARED_LIBRARY)`

bmpfile.c（从libbmp-0.1.3中提取）
bmpfile.h（从libbmp-0.1.3中提取）

libbmptest

Android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE     := PortingShared
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../libbmp/
LOCAL_SRC_FILES := PortingShared.c
LOCAL_SHARED_LIBRARIES := libbmp
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)`

PortingShared.c（利用libbmp函数中的naCreateABmp库）

#include <jni.h>

#ifndef _Included_cookbook_chapter8_portingshared_MainActivity
#define _Included_cookbook_chapter8_portingshared_MainActivity
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     cookbook_chapter8_portingshared_MainActivity
 * Method:    naCreateABmp
 * Signature: (III)V
 */
JNIEXPORT void JNICALL Java_cookbook_chapter8_portingshared_MainActivity_naCreateABmp
  (JNIEnv *env, jclass clazz, jint width, jint height, jint depth);

bmpfile_t *bmp;
int i, j;
rgb_pixel_t pixel = {128, 64, 0, 0};

for (i = 10, j = 10; j < height; ++i, ++j) {
    bmp_set_pixel(bmp, i, j, pixel);
    pixel.red++;
    pixel.green++;
    pixel.blue++;
    bmp_set_pixel(bmp, i + 1, j, pixel);
    bmp_set_pixel(bmp, i, j + 1, pixel);
}

bmp_save(bmp, "/sdcard/test_shared.bmp");
bmp_destroy(bmp);



#ifdef __cplusplus
}
#endif
#endif

我还必须提到我的MainActivity.java正在加载libbmp和PortingShared库以及调用native函数naCreateABMP

public static native void naCreateABmp(int width, int height, int depth);

static {
    System.loadLibrary("bmp");
     System.loadLibrary("PortingShared");
}

但是，当我尝试使用ndk-build命令构建它时，我得到错误：

PortingShared/jni/libbmptest/PortingShared.c:18:1: error: unknown type name 'bmpfile_t'
PortingShared/jni/libbmptest/PortingShared.c:20:1: error: unknown type name 'rgb_pixel_t'
PortingShared/jni/libbmptest/PortingShared.c:20:1: warning: excess elements in scalar initializer [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:20:1: warning: (near initialization for 'pixel') [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:20:1: warning: excess elements in scalar initializer [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:20:1: warning: (near initialization for 'pixel') [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:20:1: warning: excess elements in scalar initializer [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:20:1: warning: (near initialization for 'pixel') [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:22:1: error: expected identifier or '(' before 'for'
PortingShared/jni/libbmptest/PortingShared.c:22:24: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
PortingShared/jni/libbmptest/PortingShared.c:22:34: error: expected identifier or '(' before '++' token
PortingShared/jni/libbmptest/PortingShared.c:31:15: error: expected ')' before string constant
PortingShared/jni/libbmptest/PortingShared.c:32:1: warning: data definition has no type or storage class [enabled by default]
PortingShared/jni/libbmptest/PortingShared.c:32:1: warning: parameter names (without types) in function declaration [enabled by default]
make: *** [PortingShared/obj/local/armeabi/objs/PortingShared/PortingShared.o] Error 1

库到Android端口

0 个答案: