内置资源以及恢复出厂设置

MTK_2SDCARD_SWAP=yes

#yes means Internal && SDcard, no means Internal && Phone

打开时应用可选安装位置是内部存储空间或外置SD卡

关闭时应用仅可以装在内部存储空间或内置SD卡上。

MTK_2SDCARD_SWAP=no

MTK_SHARED_SDCARD=yes

这种情况下APK只能安装在设备内存（internal device storage),无法安装到内置T卡；

内置资源：

（1）MTK_SHARED_SDCARD=no

当MTK_SHARED_SDCARD=no,参考文档Make_And_DL_FAT_Image.pdf

1.

linux下，以root登录，用mkfs.vfat建立loop device for FAT Image

adb remount && adb shell

//取得FAT partition id

# cat /proc/emmc

//根据ID得到FAT partition size

# cat /proc/partitions

//mmcblk0p8 1760768

mkfs.vfat -v -C fat.img 1760768

2.

把fat.img mount到指定目录

mkdir fat_disk

sudo mount -o loop,iocharset=utf8 fat.img fat_disk/

用df命令可以看到/dev/loopx被mount到此

3.

将预置资源放入fat_disk

sudo cp -r '../apks_preInstall' .

4.

sudo umount fat_disk/

5.

压缩

cd '../mediatek/build/tools'

chmod +x trim

./trim '../fat.img' fat_sparse.img

6.

修改scatter.txt

partition_name: FAT

is_download: true

参考FAQ12384，处理Recovery时的状况

1,预置同样的资源到user不可见的分区，misc\system\data\apks_preInstall.

2,recovery结束，拷贝资源到SD卡上。

...\bootable\recovery\Recovery.cpp

static int restore_dir_file(char *des_dir_path, char *src_dir_path)
{
 int ret= 0;
 DIR* dir_des = NULL;
 DIR* dir_src = NULL;
 struct dirent* de_des = NULL;
 struct dirent* de_src = NULL;
 FILE * fdes = NULL;
 FILE * fsrc = NULL;
 char src_file_path[256] = {0};
 char des_file_path[256] = {0};
 char buf[256] = {0};
 int name_len = 0;
 int size = 0, file_len = 0;
 printf("\n\nenter, %s \n\n", __func__);
 printf("src dir:%s\n", src_dir_path);
 printf("des dir:%s\n", des_dir_path);
 //open dir
 dir_src = opendir(src_dir_path);
 if(dir_src == NULL) {
  printf("open src dir error:%s\n", src_dir_path);
  return -1;
 }
 dir_des = opendir(des_dir_path);
 if(dir_des == NULL) {
  ret = -1;
  if(errno == ENOENT) {
   printf("des dir not exist:%s\n", des_dir_path);
   ret = mkdir(des_dir_path, (S_IRWXU | S_IRWXG | S_IRWXO));
  }
  if(ret < 0) {
   closedir(dir_src);
   printf("open des dir error:%s\n", des_dir_path);
   return -1;
  }
  else {
   printf("mkdir des dir:%s\n", des_dir_path);
   dir_des = opendir(des_dir_path);
  }
 }
 printf("dir_src=%d, dir_des=%d\n", dir_src, dir_des);
 while ((de_src = readdir(dir_src)) != NULL) {
  printf("d_name: %s\n", de_src->d_name);
 
  if (de_src->d_type == DT_DIR) {
   name_len = strlen(de_src->d_name);
   
   // skip "." and ".." entries
   if ((name_len == 1 && de_src->d_name[0] == '.') ||
    (name_len == 2 && de_src->d_name[0] == '.' && de_src->d_name[1] == '.')) {
    continue;
   }
            else {
    //src dir path append the folder's d_name
    sprintf(src_file_path, "%s/%s", src_dir_path, de_src->d_name);
    printf("src dir path: %s\n", src_file_path);
    //des dir path append the folder's d_name
    sprintf(des_file_path, "%s/%s", des_dir_path, de_src->d_name);
    printf("des dir path: %s\n", des_file_path);
    printf("---entry sub dir to restore\n");
    ret = restore_dir_file(des_file_path, src_file_path);
    printf("sub dir restore ret=%d\n", ret);
            }
  }
  else if (de_src->d_type == DT_REG) {
   //open src file
   sprintf(src_file_path, "%s/%s", src_dir_path, de_src->d_name);
   printf("src_file_path: %s\n", src_file_path);
   fsrc = fopen(src_file_path, "r");
   printf("fsrc=%d\n", fsrc);
   //create des file
   sprintf(des_file_path, "%s/%s", des_dir_path, de_src->d_name);
   printf("des_file_path: %s\n", des_file_path);
   fdes = fopen_path(des_file_path, "w");
   printf("fdes=%d\n", fdes);
   //read from src file, write to des file
   file_len= 0;
   while (!feof(fsrc)) {
    size = fread(buf, sizeof(char), sizeof(buf), fsrc);
    fwrite(buf, sizeof(char), size, fdes);
    memset(buf, 0, sizeof(buf));
    file_len += size;
   }
   fflush(fdes);
   printf("%s: file_len=%d\n", de_src->d_name, file_len);
   
   //close file
   fclose(fsrc);
   fclose(fdes);
  }
 }
 //close dir
 closedir(dir_src);
 closedir(dir_des);
 
 printf("\n\nexit, %s \n\n", __func__);
 return 0;
}

int recovery_restore_special(char *des_dir_path, char *src_dir_path)
{
 int ret= 0;
 printf("\n\n++ %s ++\n\n", __func__);
 printf("src dir:%s\n", src_dir_path);
 printf("des dir:%s\n", des_dir_path);
 //mount path
 ret = ensure_path_mounted(src_dir_path);
 if(ret < 0) {
  printf("mount src dir error:%s\n", src_dir_path);
  return -1;
 }
 printf("mount:%s ret=%d\n", src_dir_path, ret);
 
 ret = ensure_path_mounted(des_dir_path);
 if(ret < 0) {
  printf("mount des dir error:%s\n", des_dir_path);
  ensure_path_unmounted(src_dir_path);
  return -1;
 }
 printf("mount:%s ret=%d\n", des_dir_path, ret);
 //restore dir and file
 ret = restore_dir_file(des_dir_path, src_dir_path);
 printf("restore ret=%d\n", ret);
 
 //unmount
 ensure_path_unmounted(src_dir_path);
 ensure_path_unmounted(des_dir_path);
 printf("\n\n-- %s --\n\n", __func__);
 return 0;
}

int
main(int argc, char **argv) {
...
    //data/apks_preInstall/  --->  /sdcard/apks_preInstall/
    recovery_restore_special("/sdcard/apks_preInstall", "/system/data/apks_preInstall");

// Otherwise, get ready to boot the main system...
finish_recovery(send_intent);
ui->Print("Rebooting...\n");
property_set(ANDROID_RB_PROPERTY, "reboot,");
return EXIT_SUCCESS;
}

/*----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/

（2）MTK_SHARED_SDCARD=yes

参考FAQ11640 FAQ11614

alps\vendor\mediatek\project_name\artifacts\out\target\product\your_project_name\

下创建data\media\目录，将预制资源放于此目录下，重新build new之后，userdata image中就带有您的预制资源。

FAQ10734（MTK_SPECIAL_FACTORY_RESET）

# When enable, executing factory reset will preserve the data in /data/app/

MTK_SPECIAL_FACTORY_RESET=yes

/*------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/

[FAQ11954]实现恢复出厂后不重新启动手机

/bootable/recovery/recovery.cpp文件如下处修改：

// Otherwise, get ready to boot the main system...

finish_recovery(send_intent);

return EXIT_SUCCESS;//添加这一句，直接return,进入recovery mode

ui->Print("Rebooting...\n");

android_reboot(ANDROID_RB_RESTART, 0, 0);

return EXIT_SUCCESS;

}