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| <title>配置示例</title> |
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| <p>下文提供了适用于各种设备类型的外部存储配置示例,其中仅包含配置文件的相关部分。 |
| </p><p>由于 Android 6.0 中发生了配置变化(例如移除 <code>storage_list.xml</code> 资源叠加层),因此配置示例分为两类。</p> |
| |
| <h2 id="android_5_x">Android 5.x 及更早版本</h2> |
| <h3 id="android_5_x_physical">仅主要物理存储</h3> |
| <p>这是 Nexus One 等具有单一外部存储设备(一种物理 SD 卡)的设备的典型配置。</p> |
| <p>首先,原始物理设备必须装载在 <code>/mnt/media_rw</code>(仅系统和 FUSE 守护进程可以访问该位置)下。然后,当插入/移除媒体时,<code>vold</code> 将管理 <code>fuse_sdcard0</code> 服务。 |
| </p><h4>fstab.hardware</h4> |
| <pre class="devsite-click-to-copy"> |
| [physical device node] auto vfat defaults voldmanaged=sdcard0:auto,noemulatedsd |
| </pre> |
| <h4>init.hardware.rc</h4> |
| <pre class="devsite-click-to-copy"> |
| on init |
| mkdir /mnt/media_rw/sdcard0 0700 media_rw media_rw |
| mkdir /storage/sdcard0 0700 root root |
| export EXTERNAL_STORAGE /storage/sdcard0 |
| service fuse_sdcard0 /system/bin/sdcard -u 1023 -g 1023 -d /mnt/media_rw/sdcard0 /storage/sdcard0 |
| class late_start |
| disabled |
| </pre> |
| <h4>storage_list.xml</h4> |
| <pre class="devsite-click-to-copy"> |
| <storage |
| android:mountPoint="/storage/sdcard0" |
| android:storageDescription="@string/storage_sd_card" |
| android:removable="true" |
| android:primary="true" |
| android:maxFileSize="4096" /> |
| </pre> |
| <h3 id="android_5_x_emulated">仅主要模拟存储</h3> |
| <p>这是 Nexus 4 等具有单一外部存储设备(由设备上的内部存储设备提供支持)的设备的典型配置。</p> |
| <h4>init.hardware.rc</h4> |
| <pre class="devsite-click-to-copy"> |
| on init |
| 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 |
| on fs |
| setprop ro.crypto.fuse_sdcard true |
| service sdcard /system/bin/sdcard -u 1023 -g 1023 -l /data/media /mnt/shell/emulated |
| class late_start |
| </pre> |
| <h4>storage_list.xml</h4> |
| <pre class="devsite-click-to-copy"> |
| <storage |
| android:storageDescription="@string/storage_internal" |
| android:emulated="true" |
| android:mtpReserve="100" /> |
| </pre> |
| <h3 id="android_5_x_both">模拟存储为主,物理存储为辅</h3> |
| <p>这是 Xoom 等具有多个外部存储设备(其中主要设备由设备上的内部存储设备提供支持,辅助设备是物理 SD 卡)的设备的典型配置。</p> |
| <p>首先,原始物理设备必须装载在 <code>/mnt/media_rw</code>(仅系统和 FUSE 守护进程可以访问该位置)下。然后,当插入/移除媒体时,<code>vold</code> 将管理 <code>fuse_sdcard1</code> 服务。</p> |
| <h4>fstab.hardware</h4> |
| <pre class="devsite-click-to-copy"> |
| [physical device node] auto vfat defaults voldmanaged=sdcard1:auto |
| </pre> |
| <h4>init.hardware.rc</h4> |
| <pre class="devsite-click-to-copy"> |
| on init |
| mkdir /mnt/shell/emulated 0700 shell shell |
| mkdir /storage/emulated 0555 root root |
| mkdir /mnt/media_rw/sdcard1 0700 media_rw media_rw |
| mkdir /storage/sdcard1 0700 root root |
| export EXTERNAL_STORAGE /storage/emulated/legacy |
| export EMULATED_STORAGE_SOURCE /mnt/shell/emulated |
| export EMULATED_STORAGE_TARGET /storage/emulated |
| export SECONDARY_STORAGE /storage/sdcard1 |
| on fs |
| setprop ro.crypto.fuse_sdcard true |
| service sdcard /system/bin/sdcard -u 1023 -g 1023 -l /data/media /mnt/shell/emulated |
| class late_start |
| service fuse_sdcard1 /system/bin/sdcard -u 1023 -g 1023 -w 1023 -d /mnt/media_rw/sdcard1 /storage/sdcard1 |
| class late_start |
| disabled |
| </pre> |
| <h4>storage_list.xml</h4> |
| <pre class="devsite-click-to-copy"> |
| <storage |
| android:storageDescription="@string/storage_internal" |
| android:emulated="true" |
| android:mtpReserve="100" /> |
| <storage |
| android:mountPoint="/storage/sdcard1" |
| android:storageDescription="@string/storage_sd_card" |
| android:removable="true" |
| android:maxFileSize="4096" /> |
| </pre> |
| |
| <h2 id="android_6">Android 6.0</h2> |
| <h3 id="android_6_physical">仅主要物理存储</h3> |
| <p>这是原始 Android One 等具有单一外部存储设备(一种物理 SD 卡)的设备的典型配置。这种配置没有辅助共享存储空间,且设备不支持多用户。</p> |
| <h4>fstab.device</h4> |
| <pre class="devsite-click-to-copy"> |
| /devices/platform/mtk-msdc.1/mmc_host* auto auto defaults |
| voldmanaged=sdcard0:auto,encryptable=userdata,noemulatedsd |
| </pre> |
| <h4>init.device.rc</h4> |
| <pre class="devsite-click-to-copy"> |
| on init |
| # By default, primary storage is physical |
| setprop ro.vold.primary_physical 1 |
| </pre> |
| <h3 id="android_6_emulated">仅主要模拟存储</h3> |
| <p>这是 Nexus 6 等具有单一外部存储设备(由设备上的内部存储设备提供支持)的设备的典型配置。</p> |
| <ul> |
| <li>主共享存储空间 (<code>/sdcard</code>) 在内部存储设备的顶部进行模拟。 |
| </li><li>没有辅助 SD 卡存储设备。 |
| </li><li>支持 USB OTG 存储设备。 |
| </li><li>支持多用户。 |
| </li></ul> |
| <h4>fstab.device</h4> |
| <pre class="devsite-click-to-copy">/devices/*/xhci-hcd.0.auto/usb* auto auto defaults |
| voldmanaged=usb:auto |
| </pre> |
| <h3 id="android_6_both">模拟存储为主,物理存储为辅</h3> |
| <p>这是 Xoom 等具有多个外部存储设备(其中主要设备由设备上的内部存储设备提供支持,辅助设备是物理 SD 卡)的设备的典型配置。</p> |
| <ul> |
| <li>主共享存储空间 (<code>/sdcard</code>) 在内部存储设备的顶部进行模拟。 |
| </li><li>辅助存储设备是可以采用的物理 SD 卡插槽。 |
| </li><li>支持多用户。 |
| </li></ul> |
| <h4>fstab.device</h4> |
| <pre class="devsite-click-to-copy"> |
| /devices/platform/mtk-msdc.1/mmc_host* auto auto defaults |
| voldmanaged=sdcard1:auto,encryptable=userdata |
| </pre> |
| |
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