安卓增量更新

環境：

centos? android9 idea

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步驟：

1.下載bsdiff

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2.centos 安裝

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gcc?

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make

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bzip2?

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bzip2-devel

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命令

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yum -y install gcc autoconf automake libtool make

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yum -y install bzip2

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yum -y install bzip2-devel

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3.修改解壓后bsdiff中Makefile文件? ? ?.ifndef WITHOUT_MAN? 和? ?endif 縮進

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4.在bsdiff中執行 make命令生成bsdiff和bspatch?文件

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5.生成合并差異包

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生成? ?bsdiff? ?oldapk_path.apk? newapk_path.apk? patchName.patch

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合并? ?bspatch oldapk_path.apk? newName_path.apk? patch_path.patch

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以上為服務端

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Android端

1.ndk新建個PatchUtil.java用與調用native方法

public class PatchUtils {

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????private static PatchUtils instance;

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????static {

????????System.loadLibrary("update");

????}

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????public static PatchUtils getInstance(){

????????if(instance==null){

????????????instance = new PatchUtils();

????????}

????????return instance;

????}

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????/**

?????* native方法 使用路徑為oldApkPath的Apk與路徑為patchPath的補丁包合成一個新的apk存儲與newApkPath

?????* 返回 0 成功

?????* @param oldApkPath ??示例：/usr/old/old.apk

?????* @param newApkPath ??示例：/usr/new/new.apk

?????* @param patchPath ???示例：/usr/patch/patch_1.patch

?????* @return

?????*/

????public static native int bspatch(String oldApkPath, String newApkPath, String patchPath);

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}

配置java.h 和buildOS

3.使用javah命令生成頭文件,會在jni文件夾下生成com_xxx_xxx_xxx.PatchUtils.h,

4.將bsdiff文件夾下載bspatch.c導入jni文件夾

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5.下載bzip2導入jni文件夾，刪除除了.c和.h的其他文件

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修改bspatch.c

/*-

?* Copyright 2003-2005 Colin Percival

?* All rights reserved

?*

?* Redistribution and use in source and binary forms, with or without

?* modification, are permitted providing that the following conditions

?* are met:

?* 1. Redistributions of source code must retain the above copyright

?* ???notice, this list of conditions and the following disclaimer.

?* 2. Redistributions in binary form must reproduce the above copyright

?* ???notice, this list of conditions and the following disclaimer in the

?* ???documentation and/or other materials provided with the distribution.

?*

?* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

?* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

?* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

?* ARE DISCLAIMED. ?IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY

?* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

?* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

?* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

?* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

?* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

?* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

?* POSSIBILITY OF SUCH DAMAGE.

?*/

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#if 0

__FBSDID("$FreeBSD: src/usr.bin/bsdiff/bspatch/bspatch.c,v 1.1 2005/08/06 01:59:06 cperciva Exp $");

#endif

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#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <err.h>

#include <unistd.h>

#include <fcntl.h>

#include "bzip2/bzlib.c"

#include "bzip2/crctable.c"

function(){ //點差?http://www.fx61.com/faq/muniu/460.html

#include "bzip2/compress.c"

#include "bzip2/decompress.c"

#include "bzip2/randtable.c"

#include "bzip2/blocksort.c"

#include "bzip2/huffman.c"

#include <com_xxx.xxxx.xxx_PatchUtils.h>

int genpatch(int argc,char * argv[]);

JNIEXPORT jint JNICALL Java_xxx.xxxx.xxx_PatchUtils_bspatch(JNIEnv *env,

????????jclass cls, jstring oldApkPath, jstring newApkPath, jstring patchPath) {

????int argc = 4;

????char * argv[argc];

????argv[0] = "bsdiff";

????argv[1] = (char*) ((*env)->GetStringUTFChars(env, oldApkPath, 0));

????argv[2] = (char*) ((*env)->GetStringUTFChars(env, newApkPath, 0));

????argv[3] = (char*) ((*env)->GetStringUTFChars(env, patchPath, 0));

????printf("old apk = %s \n", argv[1]);

????printf("new apk = %s \n", argv[2]);

????printf("patch = %s \n", argv[3]);

????int ret = genpatch(argc, argv);

????printf("genDiff result = %d ", ret);

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????(*env)->ReleaseStringUTFChars(env, oldApkPath, argv[1]);

????(*env)->ReleaseStringUTFChars(env, newApkPath, argv[2]);

????(*env)->ReleaseStringUTFChars(env, patchPath, argv[3]);

????return ret;

}

static off_t offtin(u_char *buf)

{

off_t y;

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y=buf[7]&0x7F;

y=y*256;y+=buf[6];

y=y*256;y+=buf[5];

y=y*256;y+=buf[4];

y=y*256;y+=buf[3];

y=y*256;y+=buf[2];

y=y*256;y+=buf[1];

y=y*256;y+=buf[0];

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if(buf[7]&0x80) y=-y;

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return y;

}

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int genpatch(int argc,char * argv[])

{

FILE * f, * cpf, * dpf, * epf;

BZFILE * cpfbz2, * dpfbz2, * epfbz2;

int cbz2err, dbz2err, ebz2err;

int fd;

ssize_t oldsize,newsize;

ssize_t bzctrllen,bzdatalen;

u_char header[32],buf[8];

u_char *old, *new;

off_t oldpos,newpos;

off_t ctrl[3];

off_t lenread;

off_t i;

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if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);

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/* Open patch file */

if ((f = fopen(argv[3], "r")) == NULL)

err(1, "fopen(%s)", argv[3]);

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/*

File format:

0 8 "BSDIFF40"

8 8 X

16 8 Y

24 8 sizeof(newfile)

32 X bzip2(control block)

32+X Y bzip2(diff block)

32+X+Y ??? bzip2(extra block)

with control block a set of triples (x,y,z) meaning "add x bytes

from oldfile to x bytes from the diff block; copy y bytes from the

extra block; seek forwards in oldfile by z bytes".

*/

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/* Read header */

if (fread(header, 1, 32, f) < 32) {

if (feof(f))

errx(1, "Corrupt patch\n");

err(1, "fread(%s)", argv[3]);

}

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/* Check for appropriate magic */

if (memcmp(header, "BSDIFF40", 8) != 0)

errx(1, "Corrupt patch\n");

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/* Read lengths from header */

bzctrllen=offtin(header+8);

bzdatalen=offtin(header+16);

newsize=offtin(header+24);

if((bzctrllen<0) || (bzdatalen<0) || (newsize<0))

errx(1,"Corrupt patch\n");

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/* Close patch file and re-open it via libbzip2 at the right places */

if (fclose(f))

err(1, "fclose(%s)", argv[3]);

if ((cpf = fopen(argv[3], "r")) == NULL)

err(1, "fopen(%s)", argv[3]);

if (fseeko(cpf, 32, SEEK_SET))

err(1, "fseeko(%s, %lld)", argv[3],

????(long long)32);

if ((cpfbz2 = BZ2_bzReadOpen(&cbz2err, cpf, 0, 0, NULL, 0)) == NULL)

errx(1, "BZ2_bzReadOpen, bz2err = %d", cbz2err);

if ((dpf = fopen(argv[3], "r")) == NULL)

err(1, "fopen(%s)", argv[3]);

if (fseeko(dpf, 32 + bzctrllen, SEEK_SET))

err(1, "fseeko(%s, %lld)", argv[3],

????(long long)(32 + bzctrllen));

if ((dpfbz2 = BZ2_bzReadOpen(&dbz2err, dpf, 0, 0, NULL, 0)) == NULL)

errx(1, "BZ2_bzReadOpen, bz2err = %d", dbz2err);

if ((epf = fopen(argv[3], "r")) == NULL)

err(1, "fopen(%s)", argv[3]);

if (fseeko(epf, 32 + bzctrllen + bzdatalen, SEEK_SET))

err(1, "fseeko(%s, %lld)", argv[3],

????(long long)(32 + bzctrllen + bzdatalen));

if ((epfbz2 = BZ2_bzReadOpen(&ebz2err, epf, 0, 0, NULL, 0)) == NULL)

errx(1, "BZ2_bzReadOpen, bz2err = %d", ebz2err);

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if(((fd=open(argv[1],O_RDONLY,0))<0) ||

((oldsize=lseek(fd,0,SEEK_END))==-1) ||

((old=malloc(oldsize+1))==NULL) ||

(lseek(fd,0,SEEK_SET)!=0) ||

(read(fd,old,oldsize)!=oldsize) ||

(close(fd)==-1)) err(1,"%s",argv[1]);

if((new=malloc(newsize+1))==NULL) err(1,NULL);

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oldpos=0;newpos=0;

while(newpos<newsize) {

/* Read control data */

for(i=0;i<=2;i++) {

lenread = BZ2_bzRead(&cbz2err, cpfbz2, buf, 8);

if ((lenread < 8) || ((cbz2err != BZ_OK) &&

????(cbz2err != BZ_STREAM_END)))

errx(1, "Corrupt patch\n");

ctrl[i]=offtin(buf);

};

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/* Sanity-check */

if(newpos+ctrl[0]>newsize)

errx(1,"Corrupt patch\n");

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/* Read diff string */

lenread = BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]);

if ((lenread < ctrl[0]) ||

????((dbz2err != BZ_OK) && (dbz2err != BZ_STREAM_END)))

errx(1, "Corrupt patch\n");

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/* Add old data to diff string */

for(i=0;i<ctrl[0];i++)

if((oldpos+i>=0) && (oldpos+i<oldsize))

new[newpos+i]+=old[oldpos+i];

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/* Adjust pointers */

newpos+=ctrl[0];

oldpos+=ctrl[0];

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/* Sanity-check */

if(newpos+ctrl[1]>newsize)

errx(1,"Corrupt patch\n");

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/* Read extra string */

lenread = BZ2_bzRead(&ebz2err, epfbz2, new + newpos, ctrl[1]);

if ((lenread < ctrl[1]) ||

????((ebz2err != BZ_OK) && (ebz2err != BZ_STREAM_END)))

errx(1, "Corrupt patch\n");

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/* Adjust pointers */

newpos+=ctrl[1];

oldpos+=ctrl[2];

};

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/* Clean up the bzip2 reads */

BZ2_bzReadClose(&cbz2err, cpfbz2);

BZ2_bzReadClose(&dbz2err, dpfbz2);

BZ2_bzReadClose(&ebz2err, epfbz2);

if (fclose(cpf) || fclose(dpf) || fclose(epf))

err(1, "fclose(%s)", argv[3]);

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/* Write the new file */

if(((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY,0666))<0) ||

(write(fd,new,newsize)!=newsize) || (close(fd)==-1))

err(1,"%s",argv[2]);

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free(new);

free(old);

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return 0;

}

添加Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE = update ??#此處為PatchUtils.java中靜態代碼塊中的名字，可按需要修改

LOCAL_C_INCLUDES:=$(LOCAL_PATH)/bzip2

LOCAL_CFLAGS = $(L_CFLAGS)

LOCAL_SRC_FILES = bspatch.c

LOCAL_C_INCLUDES = $(INCLUDES)

include $(BUILD_SHARED_LIBRARY)

使用BuilsOS生成so文件

文件生成在libs文件夾下，可按自己需求刪除不需要的ABI，或提前配置Application.mk

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jni目錄

安裝包合成

private boolean bdpatch(String name) {

final File destApk = new File(Environment.getExternalStorageDirectory(), "xxx.apk");

final File patch = new File(Environment.getExternalStorageDirectory(), name); ???????//一定要檢查文件都存在

final String _thisapk = ApkExist.extract(this);

System.out.println(patch.getAbsolutePath());

if(patch.exists()){

showToast("正在合成包請等待！");

int result = PatchUtils.bspatch(_thisapk,destApk.getAbsolutePath(),patch.getAbsolutePath());

System.out.println(result);

if(result==0){

if (destApk.exists()) {

showToast("合成成功！");

return true;

}else {

showToast("更新包合成失敗，請卸載后重新安裝！");

return false;

}

}else{

showToast("更新包合成失敗，請卸載后重新安裝！");

return false;

}

}else{

showToast("更新包合成失敗，請卸載后重新安裝！");

return false;

}

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}

public class ApkExist{

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????public static String extract(Context context) {

????????context = context.getApplicationContext();

????????ApplicationInfo applicationInfo = context.getApplicationInfo();

????????return applicationInfo.sourceDir;

????}

}

10.找到合成后的安裝包拉起安裝

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