Special Codes Description

Special Codes Description

One. Obtain Sunmi device identification

Sunmi suggests to judge whether it’s Sunmi
device by obtaining the following content:

Brand name of the device (for
example: Sunmi)

The brand name of all Sunmi devices is uniformly: Sunmi

The system model of the device
(for example: V1-B18)

The composition of the system model is:

product model + hardware features + “-” + software features

Among these model names, those beginning with V、M、P、L are handheld
devices, those beginning with T、D、S are landscape devices (up to December, 2017)

ROM version number of the
device (for example: 1.1.0).

ROM sequence number of the
device (for example: 128).

You can download Demo,create new android.os package (fixed style
of writing), place

SystemProperties.java under this package,
and obtain the specified values according to the following methods:

The code to obtain brand is:

 String brand = SystemProperties.get("ro.product.brand");

The method to obtain model is:

   String model = SystemProperties.get("ro.product.model");

The code to obtain ROM version number is:

String versionname = SystemProperties.get("ro.version.sunmi_versionname");

The method to obtain ROM sequence number

   String versioncode = SystemProperties.get("ro.version.sunmi_versioncode");

Two. Obtain SN number of the device
Add the following permission in

Obtain Sunmi SN number where
necessary with the following code.

public static String getSN() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            return Build.getSerial();
        } else
            return Build.SERIAL;

Three. Hide and recover the navigation bar
at the bottom

(Note: Sunmi has newly developed Kiosk
screen occupy mode without any modification of App. Hiding status bar and
navigation bar can be realized merely via cloud setting and it cannot be
realized via gesture. This function has been realized on T2、K1 device, and please contact technical support in terms of other
devices’ online progress: 400-902-1168 (9:00-21:00). It is suggested that the
partner apply Sunmi Kiosk screen occupy mode, which has obtained better

Android system has provided by default the
method to hide the system’s navigation bar, but it has a poorer support to
Dialog, which leads to the problem that the navigation bar pops up first before
hiding when the full screen dialog box is opened (splash screen). SunmiOS has
carried out restoration against this problem (post support from V1 system
firmware of 252 version and T1 system firmware of 132 version ).

Full screen of Activity

——Android default support

 public static void setStickFullScreen(View view) {
 int systemUiVisibility = view.getSystemUiVisibility();
    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
    | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
     systemUiVisibility |= flags;

2.       Full screen of Dialog

——Under the primary system, the bug of AOSP
will lead to the problem that the navigation bar pops up first before hiding
when the full screen dialog box is opened (splash screen).

  public void onWindowFocusChanged(boolean hasFocus) {

3.The way descriped above didn’t hid the Notification Bar & Navicatoin Bar, those bar will show again while the Dialog popup, we suggest you using custom dialog , calling the setStickFullScreen in the create method as following to solve this problem:

public AlertDialog create(boolean fullscreen) {
  LayoutInflater inflater = LayoutInflater.from(context);
   final AlertDialog dialog = new AlertDialog(context,

3.       Display navigation bar after
setting hiding

3.1.  Swiping up of global bottom

——After swiping up, the bottom navigation
bar is displayed for 4 s. After 4 s, the bottom navigation bar will be hidden

3.2.  Switch App to other Apps (for example, jump to third party App
within App, third party

App popup, etc.)

——Switch to other Apps. Whether to display
bottom navigation bar or not is subject to third party App requirement. The
bottom navigation bar will disappear when switching to its own App


  • Cause there may encounter some security problems, we has restrict that the Notification Bar & Navicaton Bar can’t be hidden completely, slide from the bottom will activate those bar again.
  • The bug of AOSP in Android will cause a problem that the Navication Bar will be hidden after a transient showing while the Dialog is popup, we have solve the problem in the latest version of SUNMI OS (After firmware version 332).
  • The Navication Bar will show as the Input software is popuped , we have solve the problem in the latest version of SUNMI OS (After firmware version 332).

Four. To avoid repeated claim for peripherals

When App needs to realize business via USB related
peripherals (for example, connect USB printer to print receipt), the user is
required by Android to manually confirm device permission, to guarantee the
user information security and prevent Trojan viruses from hacking USB devices.
How to avoid App’s repeated
claim for this peripherals permission when the USB device
plugs again the same peripheral
It is necessary to check “Applied to this
USB device by default” when the user confirms manually. It is impossible to bypass
this security mechanism via code


Add property manageSpaceActivity in application on app’s Manifest file, and specify an Activity Page you want to enter when click CLEAR DATA in System Setting.



PS You can create an auto-finish Activity to avoid your data to be cleared.

public class ManageSpaceActivity extends Activity {  
    protected void onCreate(Bundle savedInstanceState) {  
    }// onCreate