Tizen Native API  6.0

The App Common API provides functions for getting information about the application.

Required Header

#include <app_common.h>

Overview

The App common API provides common APIs that can be used at UI application and Service application. This API provides interfaces for getting information about the application.

Application Package

The Tizen native application consists of structured directories to manage the application executable file, library files, resource files, and data. When you build the application, the Tizen SDK packages those as an application package for distribution.

capi_appfw_application_package.png
Application package
Directories Description
<package id> The fully qualified name of an application (such as org.tizen.calculator).
bin The executable file of the application.
lib The application library files
res The root directory in which all resource files are located.
The application cannot write and modify any resource files
data The root directory in which an application's private data is located.
The application can read and write its own data files in the application's data directory.
shared/ The shared directory for sharing with other applications.

Getting Information About the Application

The API provides functions for obtaining an application's package name and absolute path to specified resources like Image, Sound, Video, UI layout (EDJ), and so on. It also provides functions to:

  • Get the current orientation of the device
  • Get the Internal/External root folders which are shared among all applications

Functions

int app_event_get_low_memory_status (app_event_info_h event_info, app_event_low_memory_status_e *status)
 Gets the low memory status from the given event info.
int app_event_get_low_battery_status (app_event_info_h event_info, app_event_low_battery_status_e *status)
 Gets the low battery status from given event info.
int app_event_get_language (app_event_info_h event_info, char **lang)
 Gets the language from the given event info.
int app_event_get_region_format (app_event_info_h event_info, char **region)
 Gets the region format from the given event info.
int app_event_get_device_orientation (app_event_info_h event_info, app_device_orientation_e *orientation)
 Gets the device orientation from the given event info.
int app_event_get_suspended_state (app_event_info_h event_info, app_suspended_state_e *state)
 Gets the suspended state of the application from the given event info.
int app_get_id (char **id)
 Gets the ID of the application.
int app_get_name (char **name)
 Gets the localized name of the application.
int app_get_version (char **version)
 Gets the version of the application package.
char * app_get_data_path (void)
 Gets the absolute path to the application's data directory which is used to store private data of the application.
char * app_get_cache_path (void)
 Gets the absolute path to the application's cache directory which is used to store temporary data of the application.
char * app_get_resource_path (void)
 Gets the absolute path to the application resource directory. The resource files are delivered with the application package.
char * app_get_shared_data_path (void)
 Gets the absolute path to the application's shared data directory which is used to share data with other applications.
char * app_get_shared_resource_path (void)
 Gets the absolute path to the application's shared resource directory which is used to share resources with other applications.
char * app_get_shared_trusted_path (void)
 Gets the absolute path to the application's shared trusted directory which is used to share data with a family of trusted applications.
char * app_get_external_data_path (void)
 Gets the absolute path to the application's external data directory which is used to store data of the application.
char * app_get_external_cache_path (void)
 Gets the absolute path to the application's external cache directory which is used to store temporary data of the application.
char * app_get_external_shared_data_path (void) TIZEN_DEPRECATED_API
 Gets the absolute path to the application's external shared data directory which is used to share data with other applications.
char * app_get_tep_resource_path (void)
 Gets the absolute path to the application's TEP (Tizen Expansion Package) directory. The resource files are delivered with the expansion package.
int app_get_display_state (app_display_state_e *display_state)
 Gets the display state.
int app_watchdog_timer_enable (void)
 Sends the enable request to activate the watchdog timer.
int app_watchdog_timer_disable (void)
 Sends the disable request to deactivate the watchdog timer.
int app_watchdog_timer_kick (void)
 Sends the kick request to reset the watchdog timer.

Typedefs

typedef struct app_event_handler * app_event_handler_h
 The event handler that returned from add event handler function to handle.
typedef struct app_event_info * app_event_info_h
 The system event information handle.
typedef void(* app_event_cb )(app_event_info_h event_info, void *user_data)
 The system event callback function.

Typedef Documentation

typedef void(* app_event_cb)(app_event_info_h event_info, void *user_data)

The system event callback function.

Since :
2.3
Remarks:
If the given event_info has APP_SUSPENDED_STATE_WILL_ENTER value, the application should not call any asynchronous operations in this callback. After the callback returns, process of the application will be changed to suspended state immediately. Thus, asynchronous operations may work incorrectly. (since 2.4)
Parameters:
[in]event_infoThe system event information
[in]user_dataThe user data passed from the add event handler function
See also:
ui_app_add_event_handler
app_event_info_h
typedef struct app_event_handler* app_event_handler_h

The event handler that returned from add event handler function to handle.

Since :
2.3
See also:
app_event_type_e
ui_app_add_event_handler
ui_app_remove_event_handler
app_event_info_h

Enumeration Type Documentation

Enumeration for device orientation.

Since :
2.3
Enumerator:
APP_DEVICE_ORIENTATION_0 

The device is oriented in a natural position

APP_DEVICE_ORIENTATION_90 

The device's left side is at the top

APP_DEVICE_ORIENTATION_180 

The device is upside down

APP_DEVICE_ORIENTATION_270 

The device's right side is at the top

Enumeration for display state.

Since :
5.5
Enumerator:
APP_DISPLAY_STATE_ON 

Display state is on

APP_DISPLAY_STATE_OFF 

Display state is off

Enumeration for battery status.

Since :
2.3
Enumerator:
APP_EVENT_LOW_BATTERY_POWER_OFF 

The battery status is under 1%

APP_EVENT_LOW_BATTERY_CRITICAL_LOW 

The battery status is under 5%

Enumeration for low memory status.

Since :
2.3
Enumerator:
APP_EVENT_LOW_MEMORY_NORMAL 

Normal status

APP_EVENT_LOW_MEMORY_SOFT_WARNING 

Soft warning status

APP_EVENT_LOW_MEMORY_HARD_WARNING 

Hard warning status

Enumeration for system events.

Since :
2.3
Enumerator:
APP_EVENT_LOW_MEMORY 

The low memory event

APP_EVENT_LOW_BATTERY 

The low battery event

APP_EVENT_LANGUAGE_CHANGED 

The system language changed event

APP_EVENT_DEVICE_ORIENTATION_CHANGED 

The device orientation changed event

APP_EVENT_REGION_FORMAT_CHANGED 

The region format changed event

APP_EVENT_SUSPENDED_STATE_CHANGED 

The suspended state changed event of the application (since 2.4)

See also:
app_event_get_suspended_state()
APP_EVENT_UPDATE_REQUESTED 

The update requested event (Since 3.0) This event can occur when an app needs to be updated. It is dependent on target devices.

Enumeration for suspended state.

Since :
2.4
Enumerator:
APP_SUSPENDED_STATE_WILL_ENTER 

Application will enter the suspended state

APP_SUSPENDED_STATE_DID_EXIT 

Application did exit from the suspended state


Function Documentation

Gets the device orientation from the given event info.

Since :
2.3
Parameters:
[in]event_infoThe system event info
[out]orientationThe device orientation changed
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTInvalid event context
See also:
app_event_info_h
app_device_orientation_e
int app_event_get_language ( app_event_info_h  event_info,
char **  lang 
)

Gets the language from the given event info.

Since :
2.3
Remarks:
lang must be released using free().
Parameters:
[in]event_infoThe system event info
[out]langThe language changed
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTInvalid event context
See also:
app_event_info_h

Gets the low battery status from given event info.

Since :
2.3
Parameters:
[in]event_infoThe system event info
[out]statusThe low battery status
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTInvalid event context
See also:
app_event_info_h
app_event_low_battery_status_e

Gets the low memory status from the given event info.

Since :
2.3
Parameters:
[in]event_infoThe system event info
[out]statusThe low memory status
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTInvalid event context
See also:
app_event_info_h
app_event_low_memory_status_e
int app_event_get_region_format ( app_event_info_h  event_info,
char **  region 
)

Gets the region format from the given event info.

Since :
2.3
Remarks:
region must be released using free().
Parameters:
[in]event_infoThe system event info
[out]regionThe region format changed
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTInvalid event context
See also:
app_event_info_h

Gets the suspended state of the application from the given event info.

Since :
2.4
Remarks:
The application should not use any asynchronous operations in APP_SUSPENDED_STATE_WILL_ENTER event. Because applications will be changed to suspended state just after APP_SUSPENDED_STATE_WILL_ENTER, asynchronous calls are not guaranteed to work properly.
Parameters:
[in]event_infoThe handle for getting the suspended state
[out]stateThe suspended state of the application
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTInvalid event context
char* app_get_cache_path ( void  )

Gets the absolute path to the application's cache directory which is used to store temporary data of the application.

An application can read and write its own files in the application's cache directory.

Since :
2.3
Remarks:
The returned value should be released using free().
The files stored in the application's cache directory can be removed by setting application or platform while the application is running.
Returns:
The absolute path to the application's cache directory,
otherwise a null pointer if the memory is insufficient
char* app_get_data_path ( void  )

Gets the absolute path to the application's data directory which is used to store private data of the application.

An application can read and write its own files in the application's data directory.

Since :
2.3
Remarks:
The returned value should be released using free().
Returns:
The absolute path to the application's data directory,
otherwise a null pointer if the memory is insufficient
int app_get_display_state ( app_display_state_e display_state)

Gets the display state.

Since :
5.5
Remarks:
If the application is service-application, this function returns APP_ERROR_INVALID_CONTEXT. In the headless device, this function returns APP_ERROR_NOT_SUPPORTED.
Parameters:
[out]display_stateThe display state
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_NOT_SUPPORTEDNot supported
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTThe display is in an unknown state.
char* app_get_external_cache_path ( void  )

Gets the absolute path to the application's external cache directory which is used to store temporary data of the application.

An application can read and write its own files in the application's external cache directory.

Since :
2.3
Remarks:
The returned value should be released using free().
The files stored in the application's external cache directory can be removed by setting application while the application is running.
The important files stored in the application's external cache directory should be encrypted because they can be exported via the external sdcard. To access the path returned by this function requires the privilege that is "http://tizen.org/privilege/externalstorage.appdata".
Returns:
The absolute path to the application's external cache directory,
otherwise a null pointer if the memory is insufficient
char* app_get_external_data_path ( void  )

Gets the absolute path to the application's external data directory which is used to store data of the application.

An application can read and write its own files in the application's external data directory.

Since :
2.3
Remarks:
The returned value should be released using free().
The important files stored in the application's external data directory should be encrypted because they can be exported via the external sdcard. To access the path returned by this function requires the privilege that is "http://tizen.org/privilege/externalstorage.appdata".
Returns:
The absolute path to the application's external data directory,
otherwise a null pointer if the memory is insufficient

Gets the absolute path to the application's external shared data directory which is used to share data with other applications.

Deprecated:
Deprecated since 2.4.

An application can read and write its own files in the application's external shared data directory, and others can only read the files.

Since :
2.3
Remarks:
The returned value should be released using free(). To access the path returned by this function requires the privilege that is "http://tizen.org/privilege/externalstorage.appdata". The function may not work as intended in certain devices due to some implementation issues.
Returns:
The absolute path to the application's external shared data directory,
otherwise a null pointer if the memory is insufficient
int app_get_id ( char **  id)

Gets the ID of the application.

Since :
2.3
Remarks:
id must be released using free().
Parameters:
[out]idThe ID of the application
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTThe application is launched illegally, not launched by the launch system
APP_ERROR_OUT_OF_MEMORYOut of memory
int app_get_name ( char **  name)

Gets the localized name of the application.

Since :
2.3
Remarks:
name must be released using free().
Parameters:
[out]nameThe name of the application
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTThe application is launched illegally, not launched by the launch system
APP_ERROR_OUT_OF_MEMORYOut of memory
char* app_get_resource_path ( void  )

Gets the absolute path to the application resource directory. The resource files are delivered with the application package.

An application can only read its own files in the application's resource directory.

Since :
2.3
Remarks:
The returned value should be released using free().
Returns:
The absolute path to the application's resource directory,
otherwise a null pointer if the memory is insufficient
char* app_get_shared_data_path ( void  )

Gets the absolute path to the application's shared data directory which is used to share data with other applications.

An application can read and write its own files in the application's shared data directory and others can only read the files.

Since :
2.3
Privilege Level:
public
Privilege:
http://tizen.org/privilege/appdir.shareddata
Remarks:
The returned value should be released using free().
Since Tizen 3.0, an application that want to use shared/data directory must declare http://tizen.org/privilege/appdir.shareddata privilege. If the application doesn't declare the privilege, the framework will not create shared/data directory for the application. Carefully consider the privacy implications when deciding whether to use the shared/data directory, since the application cannot control access to this directory by other applications. If you want to share files with other applications, consider passing path via App Control API. The App Control API supports giving permission to other applications by passing path via app_control.
The specific error code can be obtained using the get_last_result(). Error codes are described in Exception section.
Returns:
The absolute path to the application's shared data directory,
otherwise a null pointer if the memory is insufficient. It will return NULL for applications with api-version 3.0 or later, and set APP_ERROR_PERMISSION_DENIED if the application does not declare the shareddata privilege.
Exceptions:
APP_ERROR_NONESuccess
APP_ERROR_PERMISSION_DENIEDPermission denied
APP_ERROR_OUT_OF_MEMORYOut of memory
char* app_get_shared_resource_path ( void  )

Gets the absolute path to the application's shared resource directory which is used to share resources with other applications.

An application can read its own files in the application's shared resource directory, and others can only read the files.

Since :
2.3
Remarks:
The returned value should be released using free().
Returns:
The absolute path to the application's shared resource directory,
otherwise a null pointer if the memory is insufficient
char* app_get_shared_trusted_path ( void  )

Gets the absolute path to the application's shared trusted directory which is used to share data with a family of trusted applications.

An application can read and write its own files in the application's shared trusted directory and the family applications signed with the same certificate can read and write the files in the shared trusted directory.

Since :
2.3
Remarks:
The returned value should be released using free().
Returns:
The absolute path to the application's shared trusted directory,
otherwise a null pointer if the memory is insufficient
char* app_get_tep_resource_path ( void  )

Gets the absolute path to the application's TEP (Tizen Expansion Package) directory. The resource files are delivered with the expansion package.

An application can only read its own files in the application's TEP (Tizen Expansion Package) directory.

Since :
2.4
Remarks:
The returned value should be released using free().
Returns:
The absolute path to the application's TEP (Tizen Expansion Package) directory,
otherwise a null pointer if the memory is insufficient
int app_get_version ( char **  version)

Gets the version of the application package.

Since :
2.3
Remarks:
version must be released using free().
Parameters:
[out]versionThe version of the application
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_PARAMETERInvalid parameter
APP_ERROR_INVALID_CONTEXTThe application is launched illegally, not launched by the launch system
APP_ERROR_OUT_OF_MEMORYOut of memory

Sends the disable request to deactivate the watchdog timer.

Since :
5.5
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_CONTEXTInvalid context
See also:
app_watchdog_timer_enable()
int app_watchdog_timer_enable ( void  )

Sends the enable request to activate the watchdog timer.

Since :
5.5
Remarks:
After this function is called, the system detects a timeout error. If, due to a program error as ANR (Application Not Responding), the system fails to reset the watchdog, the timer will elapse and generate a signal to terminate the running application. If the running application has to process a lot of operations, the application should disable or reset the watchdog timer.
Returns:
0 on success, otherrwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_CONTEXTInvalid context
See also:
app_watchdog_timer_disable()
app_watchdog_timer_kick()
int app_watchdog_timer_kick ( void  )

Sends the kick request to reset the watchdog timer.

Since :
5.5
Returns:
0 on success, otherwise a negative error value
Return values:
APP_ERROR_NONESuccessful
APP_ERROR_INVALID_CONTEXTInvalid context
See also:
app_watchdog_timer_enable()