android打包so文件到apk

使用android SDK原代码 开发APK,将so文件打包进apk,这样可以只提供给客户一个apk.
1.含义全代码的so打包.
a)建立工程,并使用本地调用,java文件如下
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01.package test.jni;
02.import android.app.Activity;
03.import android.os.Bundle;
04.import android.widget.TextView;
05.public class jnitest extends Activity {
06. /** Called when the activity is first created. */
07. @Override
08. public void onCreate(Bundle savedInstanceState) {
09. super.onCreate(savedInstanceState);
10. TextView tv = new TextView(this);
11. int x = 55;
12. int y = 8;
13. System.loadLibrary("apptest");
14. //System.loadLibrary("testapi");
15. int z = appadd(x, y);
16. tv.setText( x + "+" + y + "=" + z );
17. setContentView(tv);
18. }
19. public native int appadd(int x, int y);
20.}

b)在工程的根目录建立Android.mk,内容如下.
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := user eng
LOCAL_SRC_FILES := $(call all-subdir-java-files)
LOCAL_PACKAGE_NAME := jnitest
LOCAL_JNI_SHARED_LIBRARIES := libapptest
include $(BUILD_PACKAGE)
include $(LOCAL_PATH)/jni/Android.mk
# Use the folloing include to make our test apk.
include $(call all-makefiles-under,$(LOCAL_PATH))
其中LOCAL_MODULE_TAGS名字要和目标系统一致,否则编译产生的apk文件不能安装到目标系统,.
LOCAL_JNI_SHARED_LIBRARIES := libapptest 把我们另外编译成的so文件放到apk文件里的libs/armeabi里
include $(LOCAL_PATH)/jni/Android.mk为了编译本地文件成为so

c)在工程根目录创建jni文件夹,在jni文件里创建Android.mk和callapp.c,他们内容如下:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := user eng
LOCAL_MODULE := libapptest
LOCAL_SRC_FILES := callapp.c
LOCAL_C_INCLUDES += \
$(JNI_H_INCLUDE)
LOCAL_PRELINK_MODULE := false
include $(BUILD_SHARED_LIBRARY)

LOCAL_MODULE_TAGS :要和工程的一致,否则编译不通过
LOCAL_C_INCLUDES += \$(JNI_H_INCLUDE) 为了让jni编译通过,因为工程通过jni调用本地库。

callapp.c文件内容如下：
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1.#include
2.JNIEXPORT jint JNICALL Java_test_jni_jnitest_appadd
3. (JNIEnv *env, jobject obj, jint x, jint y){
4. return x +y;
5.}
d)把工程文件放到SDK platform\packages\apps目录下,然后进入该目录,命令里输入mm,进行该工程的编译.(之前要再platform之前把工程目标设定好)

e)编译出来的apk 在platform/out/target/product/sk886x/system/app里可以找到,其中sk886x 是目标平台. 打开该apk文件,可以看到libapptest.so存在在包里的libs/armeabi文件夹里. 运行该apk,可以正常运行,显示正确答案.