JP2019023766A - Mobile terminal and application program - Google Patents

Abstract

To prevent the memory capacity of a main memory used for holding a content screen from increasing more than necessary, even if the content screen being displayed on a touch panel of a mobile terminal is switched.SOLUTION: An application 2 of a mobile terminal comprises: a content display program 21 for generating a content screen; a start management program 20 for managing the start of the content display program 21 on the basis of a layer; and a setting file 23 for defining the behavior of the application 2. By the setting file 23, the content display program 21 set to belong to a second layer operates to discard its own content screen from a stack 10a managed by an operating system 10, when calling another content display program 21.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a technique for suppressing memory consumption of an application that is activated on a mobile terminal having a touch panel such as a tablet (tablet computer).

  Cloud services that store servers on the network for various contents consisting of multiple screens and use the contents stored on the servers on mobile terminals equipped with touch panels such as tablets (tablet computers) have become widespread. .

  The mobile terminal used for the cloud service has an operating system that arranges the screen output on the touch panel in a stack format so that the last screen output on the touch panel is the top, and displays the top screen on the touch panel. In addition, an application that displays content stored in the server or mobile terminal is implemented as an application that operates on the operating system. Cloud service servers store content in various fields, and since this content is often updated, it is easy to customize applications to be installed on mobile devices. In many cases, a substantial behavior of an application such as a content to be displayed by an application by incorporating a plurality of contents display programs that can be used for general purposes can be defined by an XML format setting file (for example, patents). Reference 1).

  In this way, if the behavior of the application, such as the content to be displayed in the application, can be defined in the configuration file, the amount of main memory consumed by the application varies depending on the content of the configuration file. Regardless of the contents of the configuration file that defines the behavior, a mechanism that prevents the memory capacity of the main memory consumed by the application from increasing more than necessary is required.

  As an invention for managing the memory capacity of a computer at the time of starting an application, in Patent Document 2, resident type or temporary type attribute information is set for the application installed in the computer, and the application is currently operating at this point in time when the application is started. An invention is disclosed in which an application in which temporary type attribute information is set is forcibly terminated and an application in which resident type attribute information is set is left as it is. Further, in Patent Document 3, when switching applications, an application to be activated and terminated is determined based on the relationship with an application to be activated, and if it is determined that the memory capacity is insufficient due to activation of the application, the application is terminated. An invention that solves the shortage of memory capacity by terminating the determined application is disclosed.

JP 2003-216427 A JP 2003-15892 A JP 2014-238653 A

  However, the above-described prior art is a technique for solving a shortage of memory of a computer by ending an application satisfying a predetermined condition from the running applications when the application is started. It is not a technology that prevents the memory capacity of the main memory consumed by an application that is configured so that substantial behavior can be defined in the configuration file from being unnecessarily increased. Every time content displayed on the touch panel of a mobile device is switched, the content displayed on the touch panel is deleted from the main memory before switching so that the memory capacity of the main memory consumed by such an application does not increase more than necessary. However, in the case where content that takes a long time for display processing is repeatedly displayed on the touch panel, there is a problem in that display wait occurs every time the content is displayed, resulting in poor operability.

  Therefore, the present invention incorporates a plurality of content display programs, starts an application configured to define a substantial behavior in a setting file on the mobile terminal, and then switches the content displayed on the touch panel of the mobile terminal. However, the memory capacity of the main memory used for content display does not increase more than necessary, and for specific content, the screen displayed on the touch panel of the mobile terminal can be reused later, so that the specific content can be displayed again smoothly. An object of the present invention is to provide a mobile terminal and an application program that can be used in the future.

  A first invention that solves the above-described problem has a main memory, a touch panel, and a stack that manages screens output to the touch panel in a last-in first-out format, and the screen at the top of the stack is in the touch panel. An operating system that controls screen display so that the screen is displayed, and a program that operates on the operating system is a mobile terminal in which an application that displays a content screen composed of a plurality of screens on the touch panel is installed. Then, the mobile terminal is activated to manage the activation of the content display means based on the content display means for generating the content screen in the main memory and the layer to which the content display means belongs when the application is activated. Management means and function When the content display unit is operated to switch the content screen, the content display unit determines the layer to which the content display unit belongs by a setting file that defines at least the layer to which the content display unit belongs. If the layer is the first layer that does not discard the content screen from the stack, the content corresponding to the content screen to be switched to without destroying the content screen generated by itself from the stack When the activation management means is requested to call the display means, and the own layer is a second layer that discards the content screen from the stack, the content screen generated by itself is displayed in the stack. Execute the process of discarding from The activation management unit requests the activation management unit to call the content display unit for generating a replacement screen, and the activation management unit activates the content display unit belonging to the first layer with reference to the setting file. Then, when a call request for the other content display means is received from the content display means that generated the content screen at the top of the stack, the content to be called by referring to the setting file Only when the layer to which the display means belongs is the second layer, the mobile terminal is characterized in that the process of starting the content display means to be called is performed. According to the first invention, in a state where the content screen generated by the content display means belonging to the second layer is displayed on the touch panel, the other content display means belonging to the second layer is called. In addition, since the content screen generated by the content display unit serving as the caller is discarded from the stack formed in the main memory, the content display unit as the switching destination is called, so that the second layer The content screens do not overlap with each other on the stack, and the memory capacity of the main memory required to hold the content screens does not increase more than necessary. Further, the content screen generated by the content display means belonging to the first layer remains in the stack until the application is terminated. Therefore, the content screen generated by the content display means belonging to the first layer is Since it can be reused after being displayed on the touch panel, there is no waiting for display time.

  Further, the second invention is the invention described in the first invention, wherein the setting file includes the content display means belonging to the third layer and its activation condition, and the layer when returning from the third layer. When the activation condition is satisfied, the activation management unit performs a process of activating the content display unit belonging to the third layer, and the content display unit includes the layer to which it belongs by the setting file. In the case of the third layer, after executing the process of discarding the content screen generated by itself from the stack, the setting file is referred to obtain the layer when returning from the third layer, When the layer returning from the third layer is the first layer and the content screen of the second layer is in the stack It is characterized by executing a discarding process the content screen of the second layer from the stack. The second invention is an invention that can display a special-purpose content screen such as a screen saver, a management screen, or an operation guide.

  Furthermore, a third invention is the invention according to the first invention or the second invention, wherein the activation management means maintains the activation history of the content display means allocated to the second layer, and When a request to return to the previous content screen is received, the start history is referred to determine the layer to which the content screen at the top of the stack corresponds, and the layer is the second layer Performs processing for discarding the content screen at the top of the stack from the stack, and then refers to the activation history to determine the layer to which the previous content screen corresponds, and If the layer to which the content screen corresponds is the second layer, the content display means corresponding to the previous content screen using the activation history And performing activation processing. Note that the third invention is an invention that allows an operation to return to the previous screen.

  Further, a fourth invention is the invention according to the second invention, wherein the layer to which the content display means for displaying the menu screen as the content screen by the setting file belongs is the first layer, and the menu screen The layer of the content display means for generating the content screen that can be called from and the layer to which the content display means that can be called from the content display means belong to the second layer, and a screen saver is displayed. The layer of the content display unit is the third layer, and the activation condition of the content display unit belonging to the third layer is set to a time when no operation time continues for a predetermined time. The fourth invention is an invention in which the content display means for displaying a menu screen as content is assigned to the first layer, and a special-purpose content screen is used as a screen saver.

  Furthermore, a fifth invention is a computer program for causing a processor of a mobile terminal to function as the content display means and the activation management means according to any one of the first invention to the third invention. The fifth invention relates to a computer program.

  As described above, according to the present invention, after a plurality of content display programs are incorporated and an application configured so that a substantial behavior can be defined by the setting file is started on the mobile terminal, it is displayed on the touch panel of the mobile terminal. Even if the content to be switched is switched, it is possible to provide a mobile terminal and an application program in which the memory capacity of the main memory used for displaying the content does not increase more than necessary.

The figure explaining the cloud service system using a mobile terminal. The figure explaining the hardware constitutions of a mobile terminal. The figure explaining the structure of the software mounted in a mobile terminal. The figure explaining the content which an operating system controls a screen display. The figure explaining operation | movement of the content display program at the time of belonging to a 1st layer. The figure explaining operation | movement of the content display program at the time of belonging to a 2nd layer The figure explaining operation | movement of the content display program when it belongs to the 3rd layer The figure explaining operation | movement of the starting management program when starting the content display program which belongs to the 1st and 2nd layers. The figure explaining operation | movement of the starting management program when starting the content display program which belongs to the 3rd layer. The figure explaining operation | movement of the starting management program when operation which returns to a previous content screen is performed.

  From here, preferred embodiments of the present invention will be described. The following description is not intended to limit the technical scope of the present invention, but is provided to aid understanding.

  FIG. 1 is a diagram for explaining a cloud service system using a mobile terminal 1 according to the present embodiment. FIG. 1 stores various contents 30 used for business in addition to the mobile terminal 1 according to the present embodiment. A server 3 is shown. In addition, although the mobile terminal 1 which concerns on this embodiment is illustrated with the form of the tablet, the mobile terminal 1 which concerns on this embodiment can also be made into a smart phone.

  The server 3 illustrated in FIG. 1 stores content composed of a plurality of screens. In FIG. 1, in addition to the advertisement video 30a, the electronic catalog 30b, and the electronic questionnaire 30c, the electronic questionnaire 30c is answered as content used for business. The privilege animation 30d which can be browsed only by the user who performed is shown in figure.

  The mobile terminal 1 according to the present embodiment includes an application 2 that displays a content screen of content (here, content downloaded from the server 3 or content stored in the mobile terminal 1) on the touch panel. Yes. A user who uses the mobile terminal 1 performs business such as negotiations while switching the content screen displayed on the mobile terminal 1. When the content screen displayed on the mobile terminal 1 is switched, the user uses the content screen to generate the content screen. Since the memory capacity of the main memory to be increased increases and the operation is slowed down, the operation of the application 2 may be troubled. Therefore, in the mobile terminal 1 of the present embodiment, the content screen displayed on the mobile terminal 1 is switched. However, the memory capacity of the main memory consumed on the content screen is devised so that it does not increase more than necessary.

  A hardware configuration of the mobile terminal 1 according to the present embodiment will be described. FIG. 2 is a diagram illustrating a hardware configuration of the mobile terminal 1 according to the present embodiment. As shown in FIG. 2, the mobile terminal 1 includes, as hardware resources, a processor 1a, a RAM 1b serving as a main memory, an NVM (Nonvolatile Memory) 1c that is an electrically rewritable nonvolatile memory, and display and input. A touch panel 1d which is a device having the above functions and a mobile communication circuit 1e which is a circuit for performing communication using a mobile communication network. 2 shows only hardware resources necessary for the description of the present invention, and the mobile terminal 1 includes hardware other than those shown in FIG. 2, such as a short-range wireless communication circuit and an audio-related circuit. Hardware resources.

  The processor 1 a of the mobile terminal 1 is a processing device that executes a computer program installed in the mobile terminal 1. The RAM 1b of the mobile terminal 1 is a storage device used when the processor 1a executes a computer program. The NVM 1c of the mobile terminal 1 is a memory serving as a secondary storage device, and stores the program code of the application 2 and the like. The touch panel 1d of the mobile terminal 1 is a device in which a display (for example, a liquid crystal display) that displays content and a touch device that operates with a finger on the screen displayed on the display are combined. The mobile communication circuit 1 e of the mobile terminal 1 is a communication circuit used when the application 2 downloads content from the server 3.

  Next, the configuration of software installed in the mobile terminal 1 according to the present embodiment will be described. FIG. 3 is a diagram illustrating a configuration of software installed in the mobile terminal 1 according to the present embodiment. As shown in FIG. 3, the mobile terminal 1 according to the present embodiment includes an operating system 10 specialized for functions for mobile use, such as Apple's iOS (registered trademark) and Google's Android (registered trademark). , An application 2 operating on the operating system 10 is mounted.

  FIG. 4 is a diagram for explaining the contents that the operating system 10 controls the screen display. The operating system 10 installed in the mobile terminal 1 has a stack 10a for managing the screen output to the touch panel 1d in a last-in first-out format, so that the top screen of the stack 10a is output to the touch panel 1d. A function for controlling screen display is provided, and an API that calls a component program that generates a screen and an API that generates a window (meaning a display frame of the entire screen) are provided as APIs disclosed to the application 2.

  This function will be described in detail. The operating system 10 implemented in the mobile terminal 1 first adds (pushes) the content screen A first generated by the application 2 to the stack 10a used for screen management, and touches the content screen A at the top of the stack 10a with the touch panel. It is displayed in 1d (FIG. 4A). The operating system 10 does not put the content screen itself into the stack 10a, but manages the screen output to the touch panel 1d by putting the memory area assigned to the content screen into the stack 10a. After the content screen A is generated, when the application 2 generates the content screen B, the operating system 10 adds the content screen B generated by the application 2 to the stack 10a (S60) and becomes the top of the stack 10a. B is displayed on the touch panel 1d, and the content screen A stands by in the background of the content screen B (FIG. 4B). After the content screen B is generated, when the application 2 generates the content screen C, the operating system 10 adds the content screen C generated by the application 2 to the stack 10a (S61) and becomes the top of the stack 10a. C is displayed on the touch panel 1d, and the content screens A and B are in a standby state in the background of the content screen C (FIG. 4C). When the content screen at the top of the stack 10a is discarded by the application 2, the operating system 10 displays the previous content screen in the stack 10a on the touch panel 1d. For example, if the content screen C is discarded from the stack 10a while the content screen C is displayed on the touch panel 1d (S62), the state of the stack 10a returns to the state of FIG. , The content screen B is displayed on the touch panel 1d. When the content screen B is displayed on the touch panel 1d and the content screen B is discarded from the stack 10a (S63), the state of the stack 10a returns to the state shown in FIG. The content screen A is displayed on the touch panel 1d.

  As described above, since the operating system 10 installed in the mobile terminal 1 stacks the content screens generated by the application 2 every time the application 2 generates the content screens, the number of content screens generated by the application 2 increases. As a result, the memory capacity required to store the content screen also increases. Therefore, the application 2 according to the present embodiment is provided with a mechanism that does not increase the memory capacity required to store the content screen even if the number of content screens generated by the application 2 increases.

  As shown in FIG. 3, the application 2 installed in the mobile terminal 1 includes a content display program 21 that generates a content screen to be displayed on the touch panel 1d in the RAM 1b, a content used by the content display program 21, and a content display program 21. And a start management program 20 for managing the start of the content display program 21 based on the layer of the content display program 21 set in the setting file 23. In the present embodiment, the content display program 21 has three layers, the first layer, the second layer, and the third layer. When the first layer switches to another content screen, the content display program 21 displays its own content screen. A layer indicating that the content display program 21 is not discarded from the stack 10a. The second layer indicates that the content display program 21 discards its own content screen from the stack 10a when switching to another content screen. The third layer is a layer indicating that the content display program 21 generates a special purpose content screen (for example, a screen saver, a management screen, an operation guide, etc.).

  The setting file 23 provided in the mobile terminal 1 is a text format file stored in the NVM 1 c of the mobile terminal 1, and the substantial behavior of the application 2 is defined by the contents of the setting file 23. In the setting file 23 of the present embodiment, the identifier of the content display program 21 incorporated in the application 2 is described so that the content display program 21 incorporated in the application 2 can be arbitrarily defined. For each identifier of the content display program 21, a path in which content used by the content display program 21 corresponding to the identifier is stored and a layer to which the content display program 21 corresponding to the identifier belongs are described. Note that the content path used by the content display program 21 is described in the setting file 23 so that the content used by the content display program 21 can be changed by the setting file 23, and the content display program 21 belongs. The reason why the layer is described in the setting file 23 is that the content display program 21 assigned to the layer can be changed by the setting file 23.

  In addition, in the present embodiment, the setting file 23 defines the identifier of the content display program 21 that is activated first. In addition, in order to be able to define the behavior when displaying the special purpose content screen by the setting file 23, the start condition of the content display program 21 that generates the special purpose content screen (for example, no operation time is 10 minutes) Next, a layer returning from the third layer is defined as the behavior when the special purpose content screen is displayed and the special purpose content screen is terminated.

  The content display program 21 incorporated in the application 2 is a component program of the application 2 that functions as content display means according to the present invention. The content display program 21 corresponds to each different content, and in this embodiment, the server 3 stores the advertisement video 30a, the electronic catalog 30b, the electronic questionnaire 30c, and the privilege video 30d as the contents, and therefore is downloaded from the server 3. The content display program 21b for generating the content screen of the electronic catalog 30b, the content display program 21c for generating the content screen of the electronic questionnaire 30c downloaded from the server, and the content display program for generating the content screen of the privilege video 30d downloaded from the server 3 21d and a content display program 21a for generating a content screen of the advertisement video 30a downloaded from the server 3 are incorporated in the application 2. Furthermore, in the present embodiment, as the content display program 21 that displays the basic screen of the application 2, a content display program 21e that generates a menu screen that displays a plurality of thumbnails obtained by reducing the content screen is incorporated in the application 2.

  The basic operation of the content display program 21 incorporated in the application 2 is to generate a window for displaying a content screen using an API for generating a window, and then draw the content corresponding to itself in this window. Thus, the content screen is generated in the RAM 1b, but the specific behavior when generating the content screen is changed according to the layer defined in the setting file 23 itself. Therefore, from here, the operation of the content display program 21 will be described for each layer (first layer, second layer, and third layer).

  FIG. 5 is a diagram for explaining the operation of the content display program 21 when it belongs to the first layer. In the present embodiment, the content display program 21 belonging to the first layer is called from the activation management program 20 and activated when the application 2 is activated (S1). Since the content screen generated by the content display program 21 belonging to the first layer is the home screen of the application 2, in this embodiment, the menu screen is generated using the content display program 21 belonging to the first layer as the content screen. The content display program 21e is selected.

  When the content display program 21 belonging to the first layer is activated, first, the setting file 23 is referred to, the content path to be drawn by itself is acquired, and then the content screen is displayed using an API for generating a window. After generating the window to be displayed, the content screen is generated in the RAM 1b by drawing the content corresponding to itself in this window (S2), and the content display program belonging to the first layer by the function of the operating system 10 The content screen generated by 21 is first added to the stack 10a, and the state of the stack 10a becomes the state of FIG. 4A, and this content screen is displayed on the touch panel 1d.

  The content screen generated by the content display program 21 belonging to the first layer 22a is displayed on the touch panel 1d, that is, only the content screen is in the stack 10a, and the content screen is switched using the touch panel 1d. When an operation (in this case, an operation for selecting another content screen from the menu screen) is performed, the content display program 21 belonging to the first layer 22a refers to the setting file 23 and the layer ( Here, the first screen is confirmed (S3), and as the processing corresponding to the first layer, the content screen generated by itself is generated from the stack 10a without generating the content screen as the switching destination. Invoking the content display program 21 and starting management program Request the arm 20 (S4), the procedure of Figure 4 terminates.

  According to the behavior described above, the content display program 21 belonging to the first layer does not discard the content screen generated by itself when the content screen is switched from the stack 10a. As shown in 4 (b), a standby state is established in the background of the switched content screen.

  FIG. 6 is a diagram for explaining the operation of the content display program 21 when it belongs to the second layer. The content display program 21 belonging to the second layer is activated by being called from the activation management program 20 in response to a call request of the content display program 21 belonging to the first layer or another content display program 21 belonging to the second layer. (S10).

  The content display program 21 belonging to the second layer uses the setting file 23 to obtain the path of the content to be drawn by itself, and then uses the API for generating the window to display a window for displaying the content screen. After the generation, the content screen is generated in the RAM 1b by drawing the content corresponding to itself in this window, and the content screen generated by the content display program 21 belonging to the second layer is generated by the function of the operating system 10. Added to the top of the stack 10a, the state of the stack 10a becomes the state of FIG. 4B, and this content screen is displayed on the touch panel 1d (S11).

  When the content screen of the second layer is displayed on the touch panel 1d, an operation of switching the content screen is performed using the touch panel 1d (for example, an operation of tapping a hyperlink that calls another content screen is performed). Then, the content display program 21 belonging to the second layer refers to the setting file 23 and confirms the layer to which it belongs (here, it becomes the second layer) (S12), and processing according to the second layer Using the API for destroying the window, the content screen generated by itself is discarded from the stack 10a (S13), and then the call of the content display program 21 for generating the content screen as the switching destination is started and activated. 20 (S14), the procedure of FIG. If no other inconvenient result occurs, the process of S14 may be performed before the process of S13. Alternatively, depending on the specifications of the OS / API, the process of S13 may have to be performed after S14.

  When the content screen generated by the content display program belonging to the second layer is displayed on the touch panel 1d and the content display program 21 belonging to the first layer is called, the content screen of the second layer is discarded from the stack 10a. Therefore, the state of the stack 10a is as shown in FIG. 4A, and the first layer content screen waiting in the background of the second layer content screen is displayed on the touch panel 1d. Further, even when another content display program 21 belonging to the second layer is called in a state where the content screen of the second layer is displayed on the touch panel 1d, the content screen generated by the content display program 21 that is the calling source Is discarded from the stack 10a, a plurality of content screens related to the second layer are not stacked in the stack 10a, and the memory capacity of the RAM 1b used for storing the content screen is not increased more than necessary.

  FIG. 7 is a diagram for explaining the operation of the content display program 21 when it belongs to the third layer. The content display program 21 belonging to the third layer is activated by being called from the activation management program 20 when the activation condition of the third layer content display program 21 defined in the setting file 23 is satisfied (S20). .

  The content display program 21 belonging to the third layer uses the setting file 23 to acquire the path of the content used by itself, and then uses the API for generating the window to generate a window for displaying the content screen. Thereafter, a content screen is generated in the RAM 1b by drawing content corresponding to itself in this window, and the content screen generated by the content display program 21 belonging to the third layer is displayed in the stack 10a by the function of the operating system 10. This content screen is displayed on the touch panel 1d (S21). If the content screen generated by the content display program 21 belonging to the first layer is displayed on the touch panel 1d when the activation condition defined in the setting file 23 is satisfied, only the content screen of the first layer is displayed in the first layer. It is in a standby state in the background of a three-layer content screen (which becomes a special-purpose content screen). If the content screen generated by the content display program 21 belonging to the second layer is displayed on the touch panel 1d when the activation condition defined in the setting file 23 is satisfied, the content screens of the first and second layers are displayed. It is in a state of waiting in the background of the third layer content screen (which becomes a special-purpose content screen).

  When an operation for ending the display of the third layer content screen, that is, the special purpose content screen, is performed as the content switching operation using the touch panel 1d, the content display program 21 belonging to the third layer displays the setting file 23. To confirm the layer to which the user belongs (in this case, the third layer) (S22), and as a process corresponding to the third layer, first, using the API that destroys the window, The content screen generated by is discarded from the stack 10a (S23).

  Next, the content display program 21 belonging to the third layer refers to the setting file as a process corresponding to the third layer, and acquires a layer returning from the third layer c (S24).

  The content display program 21 belonging to the third layer branches the process depending on the layer when returning from the third layer (S25), and the content display program 21 belonging to the third layer is activated when returning from the third layer. In the case of the previous screen, the start management program 20 is notified of the end of the content display program 21 belonging to the third layer (S27), and the procedure of FIG. When the layer returning from the third layer is the first layer and the content screen of the second layer is in the stack 10a, the content screen of the second layer is stacked by using the API for discarding the window. After discarding from 10a (S26), the activation management program 20 is notified of the end of the content display program 21 belonging to the third layer (S27), and the procedure of FIG.

  When the content display program 21 belonging to the third layer is activated and the layer of the content screen at the top of the stack 10a is the first layer, the content display program 21 belonging to the third layer is activated. As shown in (b), the content screen of the first layer is in a standby state in the background of the content screen of the third layer. In this case, regardless of the layer when returning from the third layer, the content screen of the third layer is discarded from the stack 10a, so that the content screen of the first layer is displayed on the touch panel 1d. Further, when the content display program 21 belonging to the third layer is activated and the content screen layer at the top of the stack 10a is the second layer, the content display program 21 belonging to the third layer is activated, As shown in FIG. 4C, the content screens of the first and second layers are on standby in the background of the content screen of the third layer. In this case, if the layer when returning from the third layer is the previous screen, the content screen of the third layer is discarded, so that the content screen of the second layer is touched by the touch panel 1d as shown in FIG. Is displayed. When the layer returning from the third layer is the first layer, the content display program 21 belonging to the third layer discards the content screens of the second and third layers from the stack 10a. As described above, the content screen of the first layer is displayed on the touch panel 1d.

  Next, the activation management program 20 will be described. The activation management program 20 installed in the mobile terminal 1 is a component program of the application 2 that functions as activation management means according to the present invention, and is based on the layer of the content display program 21 set in the setting file 23. 21 is managed. The activation management program 20 activates the content display program 21 using an API that calls a component program that generates a screen.

  FIG. 8 is a diagram for explaining the operation of the activation management program 20 when the content display program 21 belonging to the first and second layers is activated. When the application 2 is activated, the activation management program 20 refers to the setting file 23 and first activates the content display program 21 attributed to the first layer by using an API that calls a component program that generates a screen. (S30). Thereafter, when a call request for another content display program 21 is received from the content display program 21 that generated the content screen at the top of the stack 10a (S31), the content of the call destination is used using the setting file 23. The layer to which the display program 21 belongs is specified (S32), and the process branches depending on the specified layer (S33). When the identified layer is the first layer, the activation management program 20 does not activate the called content display program 21 (in this case, the content display program 21 belonging to the first layer), and the procedure of FIG. finish. If the specified layer is the second layer, the activation management program 20 uses the API for calling the component program that generates the screen to display the called content display program 21 (in this case, the content display belonging to the second layer). Any one of the programs 21) is started (S34), and the procedure of FIG. 7 ends. Note that the processing from S31 to S34 is repeatedly executed until the application 2 is terminated.

  FIG. 9 is a diagram for explaining the operation of the activation management program 20 when the content display program 21 belonging to the third layer is activated. The activation management program 20 according to the present embodiment uses an API that calls a component program for generating a screen when the activation condition of the content display program 21 of the third layer defined in the setting file 23 is satisfied. The content display program 21 belonging to is activated, and the content screen generated by the content display program 21 belonging to the third layer is displayed on the touch panel 1d (S40). Thereafter, when the end is notified from the content display program 21 belonging to the third layer (S41), this procedure ends.

  Also, the content display program 21 according to the present embodiment displays a content screen to be displayed including a user interface for performing an operation of returning to the previous content screen, and uses this user interface to A function of notifying the activation management program 20 that an operation for returning to the previous content screen has been performed may be provided.

  In order to display the previous content screen on the touch panel 1d, the start management program 20 according to the present embodiment is a file for storing a start history of starting the content display program 21 belonging to the second layer. As a startup history file. If the layer of the callee content display program 21 is the second layer in S32 of FIG. 8, the boot management program 20 starts the call history of the callee content display program 21 (identifier, restoration parameter, etc. of the content display program 21). Is added to the activation history file, and when the layer of the called content display program 21 is the first layer, the contents of the activation history file are initialized.

  FIG. 10 is a diagram for explaining the operation of the activation management program 20 when an operation for returning to the previous content screen is performed. When an operation for returning to the previous content screen is performed using the user interface of the activation management program 20, the activation management program 20 determines the layer corresponding to the content screen at the top of the stack 10a. (S50). When this layer is the first layer, the activation management program 20 ends this procedure, and when this layer is the second layer, the activation management program 20 performs processing for discarding the content screen at the top of the stack 10a at this point. The content screen of the second layer displayed on the touch panel 1d is discarded from the stack 10a (S51). Next, the activation management program 20 determines whether the layer corresponding to the previous content screen is the second layer, depending on whether the activation history file is in the initial state (S52). If this layer is the first layer, the start management program 20 ends this procedure. If this layer is the second layer, that is, if there is a start history in the start history file, the start management program 20 Using the previous activation history saved in the file, the content display program 21 corresponding to the content screen of the second layer that was displayed one time ago was started, and the previous one was displayed The content screen of the second layer is displayed on the touch panel 1d (S53), and this procedure ends.

DESCRIPTION OF SYMBOLS 1 Mobile terminal 10 Operating system 10a Stack 2 Application 20 Startup management program 21 Content display program 23 Setting file

Claims (5)

An operating system having a main memory, a touch panel, and a stack for managing the screen output to the touch panel in a last-in first-out format, and controlling the screen display so that the screen at the top of the stack is displayed on the touch panel A mobile terminal in which an application for displaying a content screen composed of a plurality of screens on the touch panel is installed as a program that operates on the operating system,
The mobile terminal includes a content display unit that generates the content screen in a main memory when the application is started, and an activation management unit that manages activation of the content display unit based on a layer to which the content display unit belongs. And function,
When an operation for switching the content screen is performed, the content display unit determines the layer to which the content display unit belongs by a setting file that defines at least the layer to which the content display unit belongs. In the case of the first layer, which is a layer that does not discard the content screen from the stack, the content display means corresponding to the switching destination content screen is called without discarding the content screen generated by itself from the stack And when the layer of its own is the second layer that discards the content screen from the stack, the process of discarding the content screen generated by itself from the stack And the screen to switch to Requesting a call of the content display device to be generated in the startup control means,
The activation management unit refers to the setting file, activates the content display unit belonging to the first layer, and then generates the content screen at the top of the stack. Upon receiving a call request from the other content display means, the content display as the call destination is referred to only when the layer to which the content display means as the call destination belongs is the second layer with reference to the setting file Process to activate the means,
A mobile terminal characterized by that. In the setting file, the content display means belonging to the third layer and its activation condition, and the layer when returning from the third layer are defined,
The activation management means performs a process of activating the content display means belonging to the third layer when the activation condition is satisfied,
The content display means executes a process of discarding the content screen generated by itself from the stack when the layer to which the content belongs belongs to the third layer by the setting file, and refers to the setting file. If the layer when returning from the third layer is acquired, the layer when returning from the third layer is the first layer, and the content screen of the second layer is in the stack, Executing a process of discarding the content screen of the second layer from the stack;
The mobile terminal according to claim 1, wherein: The activation management means retains the activation history of the content display means assigned to the second layer, and upon receiving a request to return to the previous content screen, refers to the activation history, and The layer corresponding to the content screen at the top of the stack is determined, and when the layer is the second layer, after the processing of discarding the content screen at the top of the stack from the stack, With reference to the activation history, the layer corresponding to the previous content screen is determined, and when the layer corresponding to the previous content screen is the second layer, the activation history is used. Then, processing for starting the content display means corresponding to the previous content screen is performed.
The mobile terminal according to claim 1, wherein the mobile terminal is characterized by the above.   The layer of the content display means corresponding to the content screen that can be called from the menu screen, wherein the layer to which the content display means for displaying the menu screen as the content screen belongs by the setting file is the first layer. , And the layer to which the content display means corresponding to the content screen that can be called from the content display means belongs to the second layer, and the layer of the content display means for displaying a screen saver is the third layer. 3. The mobile terminal according to claim 2, wherein the activation condition of the content display means belonging to the third layer is a time when no operation time continues for a predetermined time. The computer program for functioning the processor of a mobile terminal as the said content display means and the said starting management means as described in any one of Claims 1-3.

Images