Using Extended Emulator Features

The emulator features can be extended in many ways. With the emulator, you can:

You can also familiarize yourself with the emulator directory structure.

Using Multi-point Touch

To create a multi-point touch effect in the emulator, press and hold the Ctrl key (Command key in macOS), while mouse-clicking on the emulator screen.

Adding a Touch Point

To add a touch point on the emulator screen, press and hold the Ctrl key (Command key in macOS) and mouse-click a point on the screen.

You can add touch points up to the maximum amount of multi-point touches. To get the maximum amount, use the System::SystemInfo::GetValue() method with the MultiPointTouchCount key.

Figure: Adding a touch point

Adding a touch point

Moving an Existing Point

To move an existing point one by one, press and hold the Ctrl key (Command key in macOS), mouse-click an existing point, and move it to another location on the screen.

Figure: Moving an existing point

Moving an existing point

To move all existing points together, press and hold the Ctrl (Command in macOS) and Shift keys, mouse-click an existing point, and move it to another location on the screen.

Figure: Moving all existing points

Moving all existing points

To move 2 existing points symmetrically together, press and hold the Ctrl (Command in macOS) and Alt keys, mouse-click an existing point, and move it to another location on the screen.

Figure: Symmetrically moving 2 existing points

Symmetrical moving the 2 existing points

Ending the Multi-point Touch

To end the multi-point touch, release the Ctrl key (Command key in macOS). The touched points on the emulator screen are invalidated, and the next screen touch event is read as a new event, not part of the previous multi-point touch event.

Figure: Invalidating touched points

Invalidating touched points

Sharing a Directory

You can share a directory between the emulator and your computer:

  1. Run the Emulator Manager and click Create or Edit.
  2. In the File Sharing section of the VM property, enable the Sharing button and select a directory to share.
  3. Start the emulator.

    The host computer's directory is shown as /mnt/host in the emulator.

You can also add a shared directory in the Emulator Control Panel (ECP):

  1. Start the emulator.
  2. Right-click the emulator and select Control Panel .
  3. Select the Host Directory Sharing tab.
  4. Add or remove the host computer directory.
NoteYou must have read/write permissions for the directory you want to share.

Using a Camera

With the emulator, you can develop an application using the Camera API. The emulator provides a virtual camera. The virtual camera simulates frames by using the image files in a host computer or using the computer Webcam.

You can use an animated GIF image file. The emulator provides an image file that can be used as a default.

In addition, you can host a Webcam as if it were a device camera.

Before running the application, install a USB-connected Webcam or embedded Webcam on your computer. On Linux, the Webcam feature uses libv4l-0. If you do not have it on your computer, this feature does not work properly. You can check the feature status with the following command:

$ dpkg -l | grep libv4l-0

  • The Webcam must support video4linux2. (Currently, only /dev/video0 is supported.)
  • Multiple instances of the emulator can be launched, but only a single emulator instance can use the camera feature.
  • Depending on the Webcam in use, the emulator camera feature may not work properly.

The following table lists the host Webcam features.

Table: Webcam features

Feature Detail Notes
FPS 30 fps -
Preview image format YUYV
Capture image format YUYV
Preview resolution QSIF: 160 x 120
QCIF: 176 x 144
QVGA: 320 x 240
CIF: 352 x 288
VGA: 640 x 480
Capture resolution QSIF: 160 x 120
QCIF: 176 x 144
QVGA: 320 x 240
CIF: 352 x 288
VGA: 640 x 480
Attributes Brightness
Unsupported attributes can return an error. For example, the camera_start_focusing() method returns an error.

Using Network Features

The Tizen Emulator provides 2 network backend types: NAT-based TCP/IP communication and a bridged network. By default, the NAT-based network is used. You can configure the network backend type in Emulator Manager > Network Configuration.

The emulator is based on the QEMU virtual machine. The NAT type exploits the QEMU user networking (SLIRP) and the bridge type uses tap networking. For more information on networking, see QEMU Networking documentation.

Proxy Configuration

The emulator provides 3 methods of proxy configuration. They can be configured in Emulator Manager > Network Configuration:

  • No proxy: does not use the proxy configuration.
  • Use host proxy: sets the same proxy value that the host uses.
  • Use manual proxy: sets manually a proxy value different from the host.
NoteThe following preallocated addresses are not supported as a manual proxy:

  • Localhost

Automatic proxy configuration is not supported due to licensing issues.

NAT (Network Address Translation)

NAT is the default networking backend and has better usability than the other backends. The emulator supports TCP, UDP, and ping within a guest. However, a raw socket is not supported.

The emulator virtually provides a LAN (Local Area Network), such as the following:

  • Gateway, host machine
  • DNS (you can specify the emulator to use the host DNS IP when the emulator starts)
  • Emulator IP

Figure: Emulator NAT network architecture

Emulator NAT network architecture

Network Connections for NAT

Inbound connections from external to the emulator fail in the NAT backend. If you want to permit inbound connections and test, you must forward the port by using one of following methods:

  • ECP (Emulator Control Panel)

    You can add port forwarding by using the ECP. In the ECP > Network card, under Add port-forwarding, enter the ports to forward.

  • SDB (Smart Development Bridge)

    The SDB provides port forwarding as a command. For more user,id=net0 information in the SDB commands, see sdb forward.

  • Launch configuration on boot

    You can forward the port upon booting the emulator by modifying the QEMU redirection option. The QEMU redirection option can be appended in the existing -netdev user,id=net0 option in the <TIZEN_STUDIO_DATA>/emulator/vms/<image name>/vm_launch.conf file with the following appending command:

    -netdev user,id=net0,hostfwd=[tcp|udp]:[<hostaddr>]:<hostport>-[<guestaddr>]:<guestport>

    Redirect incoming TCP or UDP connections to the <hostport> host port to the <guestaddr> guest IP address on the <guestport> guest port. If the <guestaddr> is not specified, its value is (default first address given by the built-in DHCP server).

    You can also connect one emulator instance with another by using redirection. To set up redirection (where A and B are emulator instances):

    1. Set up the server on A, listening to<ServerPort>.
    2. On A, append the ,hostfwd tcp:<B's localPort>-:<A's serverPort> redirection option in the vm_launch.conf file.
    3. On B, let the client connect to<B's localPort>.
      NoteThe appending value of the configuration file is removed when the user changes the VM setting on the Emulator Manager.

Bridge (Bridged Network)

The bridge backend requires a dedicated IP for the emulator and you can communicate to an external network without any port forwarding. If you want to use one of the following, you can try the bridge backend:

  • You want to permit an inbound connection with no port forwarding.
  • Your application must send and receive broadcast/multicast packets, for example a DLNA (Digital Living Network Alliance) application.
  • You want to use a firewall-free IP for the emulator.
  • You want high performance from the network.

Figure: Emulator bridged network architecture

Emulator bridged network architecture


  • Network bridging does not work when the underlying physical network device is a wireless device.
  • On macOS, only a physical network device named en0 can be used for bridging.

When the Emulator Manager creates an emulator instance, it also checks the emulator IP and sets the properties of the bridged network in Emulator Manager > Network Configuration automatically.

If you have a DHCP (Dynamic Host Configuration Protocol) server on the network, you can configure the emulator IP using DHCP. If not, enter the IP address that you want to assign.

In the following host operating systems, you must configure the properties of the bridged network directly:

  • Bridge configuration on macOS Mavericks and above:

    1. In the Apple menu, click System Preferences > Network.
    2. In the Action menu, click Manage Virtual Interfaces.
    3. Click Add (+) > New Bridge, and select the Ethernet interfaces to include in the bridge.
    4. Configure the TCP/IP for bridge, such as IP and DNS.
  • Bridge configuration on Windows 8 and above:
    1. Click the Windows Start (Start) > Control Panel. In the search box, enter "adapter", and click Network and Sharing Center > View network connections.
    2. Right-click the physical network connection used for bridging, and click Properties.
    3. On the General tab (for a local area connection), click Internet Protocol (TCP/IP) > Properties.
    4. Click Obtain an IP address automatically to delete the IP configuration, and click OK. The IP configuration (IP address, subnet mask, and default gateway) is used for the configuration of the bridged network.
    5. While holding down the Ctrl key, select the network connection and the tap device that you want to include in the bridge. For example, tap1 and Local area connection.
    6. Right-click one of the selected network connections, and click Bridge Connections.
    7. Configure the TCP/IP of the Network bridge. Reuse the deleted TCP/IP configuration of step 4.

Using Custom Skin Layout

The emulator skin consists of an <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/<PROFILE>/emulator-resources/skins/<SKIN_NAME>/layout.xml XML meta file. The file defines layout-related information, such as skin image file name, display location, and the location of hardware keys.

The following example shows the content of the layout.xml layout file:

<?xml version="1.0" encoding="UTF-8"?>
<EmulatorUI xmlns="">
      <!--Skin mode definition-->
      <form name="Portrait">
            <!--Display screen size and position-->
            <region left="30" top="81" width="480" height="800"/>
            <!--Rotate display screen by degree-->
         <!--Resource file name of the usual skin image-->
         <!--Resource file name of the skin image when hardware key events occur-->
            <key name="Home"> <!--Optional-->
               <!--Hardware key region size and position-->
               <region left="233" top="882" width="74" height="74"/>
               <keycode>139</keycode> <!--Keycode value-->
               <!--This line is displayed when mouse hovers over hardware key region-->
               <!--Defined keyboard shortcut-->
            <!--RGB line color of the hardware key hover-->
            <color R="255" G="255" B="255"/>

The emulator skin also contains a <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/<PROFILE>/emulator-resources/skins/<SKIN_NAME>/info.ini property file. The file defines skin-related information, such as skin name and supported resolutions.

The following example shows the contents of the info.ini property file: 480x800

To create your own skin layout:

  1. Create a new skin folder in the <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/<PROFILE>/emulator-resources/skins folder.
  2. In the skin folder, define the content of the layout.xml and info.ini files and include the required skin image files.
  3. Select the skin name in the Emulator Manager. You can also use the emulator start-up options in the command line.

    The image defined in your modified XML meta file is displayed when the emulator is launched.

NoteIf you reinstall Tizen Studio, the custom skin folders are reset.

Using EventCast

You can simulate events on the emulator using the Emulator Control Panel (ECP). However, simulating sensor events with the ECP is not very intuitive or convenient. While you are simulating events, it is impossible to touch the emulator screen simultaneously. EventCast enables you to simulate sensor and touch events more intuitively using a real target device.

The following figure illustrates how the EventCast application on the target device gathers events and passes them to the emulator controller, which converts and hands them over to the Tizen platform. This is convenient if you do not have a Tizen mobile device.

Figure: EventCast architecture


EventCast provides the following features:

  • Touch: Maximum number of touch points is 10
  • Sensors: Accelerometer, gyroscope, geo-magnetic, proximity, and light
  • Display: Getting images of the emulator and drawing them when using touch features


When connecting through USB, ADB is required to make a connection. If you have already installed the Android™ SDK on the computer, ADB is located in the <installed Android SDK>/sdk/platform-tools folder. Otherwise, you can download only ADB or install the Android SDK.

To install ADB:

  1. Ubuntu/macOS: Download ADB and then install it in the /usr/bin folder.

    For more information, see ADB Fastboot Install.

  2. Windows®: Download ADB and install it in the C:\ADB folder.

    For more information, see ADB Fastboot for Windows.

When connecting through Wi-Fi, make sure that your Android device and computer are within the same AP.

Installing EventCaster

EventCaster is the application on the target device. It communicates with the Tizen Emulator through the TCP/IP protocol. It can connect to the emulator using USB or Wi-Fi.

You can download the EventCaster from Google Play ( and install it manually.

Connecting EventCaster to the Emulator

To connect the EventCaster application to the emulator:

  • Connect through USB:

    1. Locate the developer options.

      On most devices running Android 3.2 or older, you can find the option under Settings > Applications > Development.

      On Android 4.0 and newer, it is in Settings > Developer options.

      NoteOn Android 4.2 and newer, the developer options are hidden by default. To make them available, go to Settings > About phone and tap Build number 7 times. Return to the previous screen to find the developer options.
    2. Enable USB debugging.
    3. Connect the device to a computer through USB.
    4. Launch the EventCaster.
    5. Start the server using a default port (7000) or enter the port number.
    6. Forward a TCP port using the adb forward command.

      For example, to forward the 7000 port in the application to the 1234 port in your computer: adb forward tcp:1234 tcp:7000

    7. Launch the Tizen Emulator, and open the Emulator Control Panel (ECP) from the emulator context menu.
    8. Select the USB checkbox on the EventCast tab of the ECP.
    9. Enter the forwarded port number and click Connection on the ECP.

      If the emulator connects to the application successfully, the Show Event button in the application is activated.

    10. Click Show Event. You can now send a sensor or touch value to the emulator.
  • Connect through Wi-Fi:
    1. Enable Wi-Fi on device and select the Wi-Fi network.
    2. Connect the Android device to a network where you also have a computer running the emulator.
    3. Launch EventCaster and click Read WiFi.

      The application gets the IP address of the connected network.

    4. Click Start Server.
    5. Select the Wi-Fi checkbox on the EventCast tab of the ECP.
    6. Enter the IP address and port number using EventCaster and then click Connect on the ECP.

      If the emulator connects to the application successfully, the Show Event button in the application is activated.

    7. Click Show Event. You can now send a sensor or touch value to the emulator.

Starting an Emulator with a Configuration File

If you create an emulator instance using the Emulator Manager, a configuration file defining the emulator start-up options is generated (<TIZEN_STUDIO_DATA>/emulator/vms/<VM_NAME>/vm_launch.conf).

With the configuration file, you can launch the emulator in the command line:

./emulator --conf <configuration file>

The emulator binaries are located in the <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/common/emulator/bin folder.

The configuration file consists of 2 sections:

  • QEMU_OPTIONS section defines the qemu options, such as RAM, network, and devices.
  • VARIABLES section defines the values for the qemu options.

You can override the defined qemu values on the emulator starting time. For example, to override the guest RAM size:

  1. The -m qemu option (which sets the guest RAM size) and its value are written in the configuration file:

    ram=512     # define variable ram
    -m ${ram}   # use variable ram
  2. To override the guest RAM size, start the emulator with the following command:
    ./emulator --conf <configuration file> --ram 1024

For more information on the start-up options, see QEMU Emulator User Documentation and the vm_launch.conf file.

The following example shows the configuration file:

network_proxy="http_proxy= https_proxy= ftp_proxy= socks_proxy="
append="vm_name=${vm_name} video=LVDS-1:${display_resolution}-32@60 dpi=${display_pixel_density} ${network_proxy} host_ip=${host_ip} console=ttyS0"

-drive ${drive},id=drive
-device virtio-blk-pci,drive=drive
-drive ${swap},id=swap
-device virtio-blk-pci,drive=swap
-device vigs,backend=gl,wsi=${wsi}
-device yagl,wsi=${wsi},protocol=23
-smp ${process_num}
-m ${ram}
-device virtio-maru-sensor-pci,sensors=${sensors}
-device maru-camera,index=0,path=${virt_cam_img_path0}
-device virtio-maru-nfc-pci
-netdev user,id=net0
-device virtio-net-pci,netdev=net0
-chardev file,path=${kernel_log},id=con0
-device isa-serial,chardev=con0
-device virtio-serial
### virtual console for unix socket client
#-chardev socket,path=/tmp/virtcon,server,nowait,id=virtcon0
#-device virtconsole,chardev=virtcon0
### virtual console for telnet client
#-chardev socket,port=2222,host=,server,nowait,id=virtcon1
#-device virtconsole,chardev=virtcon1
-L ${bios_path}
-kernel ${kernel}
-append ${append}
-display maru_qt,rendering=onscreen,resolution=${display_resolution},dpi=${display_pixel_density}
-device virtio-maru-touchscreen-pci,max_point=${max_point}
-device AC97
-device virtio-maru-esm-pci
-device virtio-maru-hwkey-pci
-device virtio-maru-evdi-pci
-device virtio-maru-keyboard-pci
-device virtio-maru-vmodem-pci
-device virtio-maru-power-pci
-device codec-pci
-device maru-brightness
-rtc base=utc
-M maru-x86-machine
-vga none
-device virtio-maru-jack-pci,jacks=${jacks}

Emulator Directory Structure

The following table describes the content of the emulator directory, located in the <TIZEN_STUDIO>/tools/emulator folder.

Table: Emulator directory content

Folder or file Description
bin/emulator-manager Emulator Manager GUI
bin/em-cli Emulator Manager CLI (Command Line Interface)
bin/em-cli.jar Emulator Manager CLI executable
bin/em-lib.jar Emulator Manager library
bin/em-ui-3.0.jar Emulator Manager GUI executable
bin/emulator-control-panel.jar Emulator Control Panel (ECP)
bin/emulator-control-panel-cli.jar ECP CLI (Command Line Interface)
bin/libecp.jar Profile-independent library for ECP
bin/<LIBRARIES> Third party libraries, such as JNA, Protobuf, ARGS4J, JSON-simple, and JLINE
storages/sdcard/sdcard_xxx.img .img files (base sdcard images) specific to the data size used by the Emulator Manager
storages/swap/swap.img Disk image for swap

The following table describes the platform image directories that are located in the <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/<PROFILE>/emulator-images folder.

Table: Platform image directory content

Name Description
<IMAGE_DIR> Platform image directory
<IMAGE_DIR>/emulimg-<VERSION>.<ARCHITECTURE> Platform image, which represents an emulator root file system for x86 in the guest OS view
<IMAGE_DIR>/info.ini File for specifying platform image information

The following table describes the platform common directories that are located in the <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/common/emulator folder.

Table: Platform common directory content

Name Description
bin/ Binary files
bin/emulator Emulator
bin/emulator-x86_64 x86 emulator binary, including QEMU
data/bios/ .bin files for initializing the guest OS
data/kernel/ Kernel image for the guest Linux OS

The following table describes the platform resource directories that are located in the <TIZEN_STUDIO>/platforms/<PLATFORM_VERSION>/<PROFILE>/emulator-resources folder.

Table: Platform resource directory content

Name Description
plugins/ Plugins for profile
plugins/ecp-plugin-<PROFILE>-<VERSION>.jar Plugin for the ECP
plugins/ecp-plugin-<PROFILE>-<VERSION>.xml XML file for the ecp-plugin-<PROFILE>-<VERSION>.jar file configuration
plugins/em-plugin-<PROFILE>.jar Plugin for the Emulator Manager
skins/ Emulator skin images specific to the emulator resolution, and icons for the emulator option button and shortcut
skins/<SKIN_NAME>/info.ini File for specifying emulator skin information
skins/<SKIN_NAME>/layout.xml Metafile for the emulator skin layout
template/<IMAGE_NAME>.xml XML file for default configuration of the virtual machine created by the Emulator Manager
template/<IMAGE_NAME>-template.xml XML file for the template of the virtual machine created by the Emulator Manager

The following table describes the directory structure of the user-specific files that are located in the <TIZEN_STUDIO_DATA>/emulator/vms folder.

Table: User directory content

Name Description
.em.lock Lock file used for synchronization between VM operations, such as modify, delete, and launch
.tizen-em-info Configuration file for the Emulator Manager
emulator-manager.log Emulator Manager log file
last-created_<PROFILE>.xml File for saving the VM properties that the user created last. When user creates a new VM next time, properties in this file are displayed as default.
<VM_NAME>/ Target-specific images
<VM_NAME>/emulimg-<VM_NAME>.<ARCHITECTURE> Writable <VM_NAME> image file
<VM_NAME>/ Hidden data for the emulator GUI
<VM_NAME>/logs/ Log files (emulator and kernel logs)
<VM_NAME>/swap-<VM_NAME>.img Swap image file
<VM_NAME>/vm_config.xml Hardware configuration file
<VM_NAME>/vm_launch.conf Emulator start-up options file (for more information, see Starting an Emulator with a Configuration File)
<VM_NAME>/${USER}.lock Lock file used for synchronization between VM and ECP for set/get operations