Android虚拟sdcard

如何虚拟sdcard？

在init.*.rc添加下面内容：

on init
    # See storage config details at http://source.android.com/tech/storage/
    mkdir /mnt/shell/emulated 0700 shell shell
    mkdir /storage/emulated 0555 root root

    export EXTERNAL_STORAGE /storage/emulated/legacy
    export EMULATED_STORAGE_SOURCE /mnt/shell/emulated
    export EMULATED_STORAGE_TARGET /storage/emulated

    # Support legacy paths
    symlink /storage/emulated/legacy /sdcard
    symlink /storage/emulated/legacy /mnt/sdcard
    symlink /storage/emulated/legacy /storage/sdcard0
    symlink /mnt/shell/emulated/0 /storage/emulated/legacy


# virtual sdcard daemon running as media_rw (1023)
service sdcard /system/bin/sdcard /data/media /mnt/shell/emulated 1023 1023
    class late_start