CN105653934B - Mobile terminal and application protection method thereof - Google Patents
Mobile terminal and application protection method thereof Download PDFInfo
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- CN105653934B CN105653934B CN201511008478.XA CN201511008478A CN105653934B CN 105653934 B CN105653934 B CN 105653934B CN 201511008478 A CN201511008478 A CN 201511008478A CN 105653934 B CN105653934 B CN 105653934B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
- G06F21/52—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity ; Preventing unwanted data erasure; Buffer overflow
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
- G06F21/55—Detecting local intrusion or implementing counter-measures
- G06F21/554—Detecting local intrusion or implementing counter-measures involving event detection and direct action
Abstract
The invention discloses a mobile terminal and an application protection method thereof, wherein the mobile terminal is provided with an Android operating system, and an application runs in the Android operating system, and the method comprises the following steps: when the Android operating system is started and the application is not started, setting an empty service component for the application, wherein the service component is distributed with a process identification code and prompt information; and running the service component in the background of the Android operating system, wherein when the service component runs in the background, the kernel of the Android operating system identifies the service component as background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2. According to the invention, the empty service components can be set for the application according to the importance degree of the application, the process type of the application is modified, and the priority of the process is improved, so that the application is prevented from being preferentially ended when the system is internally insufficient or the number of the application processes is excessive, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a mobile terminal and an application protection method thereof.
Background
In recent years, with the development of the mobile communication technology field, a number of mobile terminals with high configuration and high performance are developed, but the middle-end and low-end markets still cannot ignore the mobile terminals. In a mobile phone with medium-low configuration, when a large number of applications are operated, the system memory occupation is continuously increased, a kernel of an Android system starts a low memory management mechanism, checks are executed regularly, Kill (kills) some applications, and the memory is released.
The low memory management mechanism mainly determines the importance of a process by oom _ adj (process priority) of the process, and the smaller the oom _ adj value is, the more important the program is, and the lower the possibility of being killed is.
Please refer to the relationship table of the process types and corresponding oom _ adj defined by the system:
wherein the process type changes dynamically with application type, whether visible or not, and the corresponding oom _ adj value changes accordingly.
In the Android system, the low memory management mechanism specifies a set of memory thresholds in user space, and when a certain value of the memory thresholds is in the same range as the oom _ adj value of a certain type of process, the process is killed. Therefore, some important applications in the system, such as the launcher application, which is the desktop of the mobile phone, are important application modules for the user experience, and are responsible for organizing and displaying all the applications of the system. The application program type of the starter is HOME _ APP, and the corresponding oom _ adj is 6; when the operation is visible and operable to the user in the FOREGROUND, the process type is converted into FOREGROUND _ APP, and oom _ adj is 0 at the moment, and the priority is very high; when the process is VISIBLE but not operable for the user, the process type is VISIBLE _ APP, and oom _ adj is 1 and is reduced; when it falls back to the background and is completely invisible to the user, it is HOME _ APP, its process type becomes 6, the priority drops lower, when the priority of the launcher drops, it may be killed, and the experience of the launcher application being killed and restarted is not what the user wishes to see, but such a situation often happens when the user experiences other applications for a long time and returns again.
Applications can generally be prevented from being killed in the prior art as follows:
1. the application is promoted to be a system core process, the application cannot be killed under any condition, and the operation of forced stopping can be shielded in the ' setting ' ═ application program '. By the method, the application can never be killed, but the mode that the application is forced to be promoted to be a core process and continuously occupies the memory is forced, an Android memory management mechanism is violated, and the operation of the whole system is interfered.
2. Oom _ adj or memory thresholds for a certain type of process are adjusted to control the likelihood that this type of application will be Kill, but this approach will affect other similar applications running on the handset system.
Therefore, the method for reducing the application killing in the prior art has the defects of feasibility and humanization.
Disclosure of Invention
The invention provides a mobile terminal and an application protection method thereof, which are used for modifying the process type of an application by setting an empty service component for the application, improving the priority of the process, avoiding the prior termination of the application when the system is internally insufficient or the number of application processes is excessive, and improving the user experience.
One aspect of the present invention provides an application protection method for a mobile terminal, where the mobile terminal is equipped with an Android operating system, and an application runs in the Android operating system, and the method includes:
when the Android operating system is started and the application is not started, setting an empty service component for the application, wherein the service component is distributed with a process identification code and prompt information;
and running the service component in the background of the Android operating system, wherein when the service component runs in the background, the kernel of the Android operating system identifies the service component as a background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2.
When the application is started, the process identification code is sent to the kernel, so that the kernel identifies the service component as FOREGROUND service, the process type of the service component is converted into FOREGROUND _ APP, and the oom _ adj value is 0.
When the application is started, the application transmits the prompt message to a framework layer of an Android operating system, and the method further comprises the following steps:
judging whether the prompt information is sent by the application;
if so, the prompt information is not displayed on the status bar.
Wherein, the mobile terminal is a low-configuration device.
Wherein the application comprises a launcher.
Another aspect of the present invention provides a mobile terminal, where the mobile terminal is installed with an Android operating system, an application of the mobile terminal runs in the Android operating system, and the mobile terminal includes:
the system comprises a setting module, a processing module and a prompt module, wherein the setting module is used for setting an empty service component for the application when the Android operating system is started and the application is not started, and the service component is distributed with a process identification code and prompt information;
and the operation module is connected with the setting module and is used for operating the service component in the background of the Android operating system, when the service component operates in the background, the kernel of the Android operating system identifies the service component as background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2.
Wherein, mobile terminal still includes:
and the transmission module is connected with the running module and used for sending the process identification code to the kernel when the application is started, so that the kernel identifies the service component as FOREGROUND service, the process type of the service component is converted into FOREGROUND _ APP, and the oom _ adj value is 0.
The transmission module is further used for transmitting the prompt message to a framework layer of an Android operating system by the application when the application is started, and the mobile terminal further comprises:
the judging module is connected with the transmission module and used for judging whether the prompt information is sent by the application;
and the display module is connected with the judgment module and is used for not displaying the prompt information on the status bar when the judgment result is yes.
Wherein, the mobile terminal is a low-configuration device.
Wherein the application comprises a launcher.
Through the scheme, the invention has the beneficial effects that: different from the prior art, the low-configuration mobile terminal is provided with the Android operating system, the application runs in the Android operating system, the empty service component is set for the application according to the importance degree of the application, the service component runs in the background of the Android operating system and does not execute specific functions, so that the process type of the application is modified through the empty service component, the priority of the process is improved, the probability of preferentially finishing when the application is insufficient in the system or the number of application processes is excessive is reduced, the scheme is easy to implement, obvious in effect and high in feasibility, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a flowchart illustrating an application protection method of a mobile terminal according to an embodiment of the present invention;
fig. 2 is a block diagram of an apparatus structure of a mobile terminal of the present invention;
fig. 3 is a schematic diagram of a hardware structure of the mobile terminal of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating an application protection method of a mobile terminal according to an embodiment of the present invention. The mobile terminal is provided with an Android operating system, and the application of the mobile terminal runs in the Android operating system. As shown in fig. 1, the application protection method of the mobile terminal of this embodiment includes:
s11: and when the Android operating system is started and the application is not started, setting an empty service component for the application.
The mobile terminal is referred to herein as a low configuration setting and the application includes, but is not limited to, being an initiator. The low configuration setting is provided with an Android operating system, and applications such as a starter run in the Android operating system, wherein the Android operating system comprises four components, namely Activity, Service, Content Provider and Broadcast Receiver. The Activity is used for expressing functions and is an application program component, and in the Android program, the Activity generally represents one screen of a mobile phone screen, and a designated control is displayed through setContentView (View). The Service is used for running the Service in the background and does not provide interface presentation. Broadcast Receiver is used to receive the Broadcast. Content Provider supports storing and reading data in multiple applications, equivalent to a database.
Compared with the Activity which is responsible for displaying the function, the Service is invisible to the user, is responsible for partial background operation, is an application component which does not interact with the user, has the capability which cannot be completed by partial Activity, and comprises background operation and is not managed by the Activity life cycle. The Android system will try to keep the application process with Service running, even if the application is already running in the background.
In this embodiment, when the Android operating system is started but the application is not started, an empty service component is set for the application, wherein the service component is allocated with a process identification code and prompt information. The service component is an empty program that does not perform a specific function, but is used only to change the process type of the application to lower oom _ adj values. The starting mode of the Service component is started by attaching to a main process of the application, and is started by calling a startForeground (int, Notification) (a program of the android system), and a process identification code and prompt information of the Service are used as transfer parameters of the application protection method.
S12: and running the service component in the background of the Android operating system.
The service component is operated in the background of the Android operating system, and when the service component is operated in the background, the kernel of the Android operating system identifies the service component as a background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2.
The Android operating system adopts a layered architecture, and comprises four layers, namely an application program layer, an application program framework layer, a system operation library layer and a Linux kernel layer from a high layer to a low layer. The Android can be published together with a series of core application packages, and the application packages comprise a client, an SMS (short message service) program, a calendar, a map, a browser, a contact management program and the like. The Application framework refers to an Application Programming Interface (API), and developers can completely access the API framework used by the core Application. The system operation libraries refer to some C/C + + libraries contained in the Android operating system, and the libraries can be used by different components in the Android system. They provide services to developers through the Android application framework. The Linux kernel control includes Security (Security), Memory Management (Memory Management), program Management (Process Management), Network Stack (Network Stack), Driver Model (Driver Model), and the like.
S13: when the application is started, the process identification code is sent to the kernel.
When the application is started, the process identification code is sent to a kernel of the Android operating system, so that the kernel identifies the service component as FOREGROUND service, the process type of the service component is converted into FOREGROUND _ APP, and the oom _ adj value of the FOREGROUND _ APP is 0.
S14: and the application transmits the prompt information to a framework layer of the Android operating system and judges whether the prompt information is sent by the application.
When the application is started, the application also transmits the prompt information to a framework layer of the Android operating system, and judges whether the prompt information is sent by the application. If so, the process proceeds to step S15, and if not, the process proceeds to step S16.
S15: no prompt is displayed on the status bar.
And if the prompt information is judged not to be sent by the application, not displaying the prompt information on the status bar, wherein the prompt information can be eliminated by modifying a code setserviceforkroundLockend () method in the framework layer Activiyservice.
S16: and displaying prompt information on the status bar.
And if the prompt information is judged to be sent by the application, displaying the prompt information on the status bar.
The following description takes the starter as an example.
When the Android operating system is started but the starter is not started, an empty Service component, hereinafter collectively referred to as Service, is set for the starter. And Service is allocated with a process identification code and prompt information.
When the starter is not started, the Service is run in the background of the Android operating system, namely the starter is not operable to the user, but because the starter sets an empty Service, the Service is active in the background, so the process type of the starter is kept as SECONDARY _ SERVER, and the oom _ adj value is 2.
When the launcher is started, the start of the Service is started in adherence to the main process of the application, where the launcher starts the Service by the startForeground method. When the starter is started, the process identification code is sent to the kernel of the Android operating system, so that the kernel identifies Service as FOREGROUND Service, the process type of the Service of the starter is converted into FOREGROUND _ APP, and the oom _ adj value is 0.
And when the starter is started and the system identifies Service as foreground Service, the starter also transmits prompt information (the Notification parameter herein) to a framework layer of the Android operating system, so that prompt information of 'the starter application keeps running' is displayed on a status bar of the low-configuration device. In order to avoid poor user experience, the embodiment of the present invention may choose to cancel the display, specifically:
the prompt information can be eliminated by judging whether the prompt information is sent by the starter, namely the prompt information is eliminated by modifying a code setserviceforkroundLockend () method in a framework layer Activityservice. The code is as follows:
……
if (| ("Starter Package name". equals (r. packageName))) {// if applied for launcher, jump out if statement, do not execute the following code
r.postNotification()；
}
……
In summary, when the initiator runs on the FOREGROUND and is visible and operable to the user, the system identifies Service as FOREGROUND Service, the process type of the Service is FOREGROUND _ APP, the oom _ adj value is 0, and the priority is highest; when the initiator is VISIBLE but not operable to the user, its process type is translated to VISIBLE _ APP, oom _ adj has a value of 1, i.e. the priority of the initiator is reduced. When the launcher is backed to the background and is completely invisible to the user, because the launcher sets an empty Service and the Service is active in the background, the process type of the launcher is kept as a SECONDARY _ SERVER, the oom _ adj value is 2, the priority is still higher than that of other applications, thereby greatly reducing the probability that the launcher is killed by a priority Kill, namely, the launcher can be prevented from being ended to a certain extent when the Android system has insufficient memory or the number of application processes is too large because the priority is lower.
The method can be realized by modifying the kernel of the Android operating system.
Referring to fig. 2, fig. 2 is a schematic block diagram of a mobile terminal according to the present invention, wherein the application protection method of the embodiment of fig. 1 is explained based on the mobile terminal of fig. 2. As shown in fig. 2, the mobile terminal 1 is installed with an Android operating system, and the application of the mobile terminal 1 runs in the Android operating system. In this embodiment, the mobile terminal 1 is in a low configuration setting, and the application includes, but is not limited to, being a launcher.
The mobile terminal 1 comprises a setting module 10, an operation module 20, a transmission module 30, a judgment module 40 and a display module 50 which are connected in sequence. The setting module 10 is configured to set an empty service component for the application when the Android operating system is started and the application is not started, where the service component is allocated with a process identification code and prompt information. The running module 20 runs the service component in the background of the Android operating system, and when the service component runs in the background of the Android operating system, the kernel of the Android operating system identifies the service component as a background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2.
When the application is started, the transmission module 30 sends the process identification code to the kernel of the Android operating system, so that the kernel identifies the service component as a FOREGROUND service, and the process type of the service component is converted into a FOREGROUND _ APP, and the oom _ adj value of the FOREGROUND _ APP is 0. And the transmission module 30 is further configured to transmit the prompt message to a framework layer of the Android operating system when the application is started. The determination module 40 determines whether the prompt is sent by the application, and if so, the display module 50 does not perform displaying the prompt on the status bar.
Referring to fig. 3, fig. 3 is a schematic diagram of a hardware structure of the mobile terminal according to the present invention. As shown in fig. 3, the mobile terminal 1 is a low-configuration device, which is installed with an Android operating system, and the application runs in the Android operating system, and includes but is not limited to a launcher. The mobile terminal 1 includes, among other things, a processor 100, a memory 200, and a communication bus 300. The processor 100 may be a CPU, and the memory 200 is specifically a memory of the mobile terminal 1 or a storage space of a nonvolatile memory. The processor 100 is adapted to execute executable modules, such as computer programs, stored in the memory 200. The memory 200 is used to store programs that may be executed by the processor 100, and the communication bus 300 is used to connect the processor 100, the memory 200, and other elements.
The program stored in the memory 200 in the present embodiment is specifically configured to:
when the Android operating system is started and the application is not started, setting an empty service component for the application, wherein the service component is distributed with a process identification code and prompt information; and running the service component in the background of the Android operating system, wherein when the service component runs in the background, the kernel of the Android operating system identifies the service component as a background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2.
And, the program is further for: when the application is started, the process identification code is sent to the kernel, so that the kernel identifies the service component as FOREGROUND service, the process type of the service component is converted into FOREGROUND _ APP, and the oom _ adj value of the FOREGROUND _ APP is 0. And the application also transmits the prompt information to a framework layer of the Android operating system, judges whether the prompt information is sent by the application, and if so, does not execute displaying the prompt information on the status bar.
The embodiments of the present invention may be embodied as a software product, which includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the methods described in the embodiments of the present invention.
In summary, the invention sets an empty service component for the application, the service component does not execute a specific function, and further modifies the process type of the application through the empty service component, thereby improving the priority of the process, and reducing the probability that the application is preferentially ended when running to the background and the system is internally insufficient or the number of application processes is excessive.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An application protection method of a mobile terminal is characterized in that the mobile terminal is provided with an Android operating system, and an application runs in the Android operating system, and the method comprises the following steps:
when the Android operating system is started and the application is not started, setting an empty service component for the application, wherein the service component is allocated with a process identification code and prompt information;
running the service component in the background of the Android operating system, wherein when the service component runs in the background, the kernel of the Android operating system identifies the service component as a background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2;
when the application is started, sending the process identification code to the kernel, so that the kernel identifies the service component as FOREGROUND service, the process type of the service component is converted into FOREGROUND _ APP, and the oom _ adj value of the FOREGROUND _ APP is 0;
the service component is used for changing the process type of the application so as to reduce the oom _ adj value of the process and improve the process priority of the application.
2. The method according to claim 1, wherein the prompt message is sent to the application when the application is started, and the application passes the prompt message to a framework layer of the Android operating system, and the method further comprises:
judging whether the prompt information is sent by the application;
and if so, not executing the prompt information displayed on the status bar.
3. The method of claim 1, wherein the mobile terminal is a low-profile device.
4. The method of claim 1, wherein the application comprises a launcher.
5. The mobile terminal is characterized in that the mobile terminal is provided with an Android operating system, an application of the mobile terminal runs in the Android operating system, and the mobile terminal comprises:
the setting module is used for setting an empty service component for the application when the Android operating system is started and the application is not started, wherein the service component is distributed with a process identification code and prompt information;
the operation module is connected with the setting module and used for operating the service component in the background of the Android operating system, when the service component operates in the background, the kernel of the Android operating system identifies the service component as background service, the process type of the service component is SECONDARY _ SERVER, and the oom _ adj value of the service component is 2;
the transmission module is connected with the running module and used for sending the process identification code to the kernel when the application is started, so that the kernel identifies the service component as FOREGROUND service, the process type of the service component is converted into FOREGROUND _ APP, and the oom _ adj value of the FOREGROUND _ APP is 0;
the service component is used for changing the process type of the application so as to reduce the oom _ adj value of the process and improve the process priority of the application.
6. The mobile terminal according to claim 5, wherein the transmission module is further configured to send the prompt message to the application when the application is started, and the application transfers the prompt message to a framework layer of the Android operating system, and the mobile terminal further includes:
the judging module is connected with the transmission module and used for judging whether the prompt information is sent by the application or not;
and the display module is connected with the judgment module and is used for not displaying the prompt information on the status bar when the judgment result is yes.
7. The mobile terminal of claim 5, wherein the mobile terminal is a low-profile device.
8. The mobile terminal of claim 5, wherein the application comprises a launcher.
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| CN107844342B (en) * | 2017-11-21 | 2021-07-09 | Oppo广东移动通信有限公司 | Control method and device for keeping application program alive, storage medium and mobile terminal |
| CN108153620A (en) * | 2017-12-27 | 2018-06-12 | 深圳豪客互联网有限公司 | A kind of course control method and device |
| CN111782347A (en) * | 2019-04-03 | 2020-10-16 | 安克创新科技股份有限公司 | Mobile phone application keep-alive method, device and system and storage medium |
| CN112685088A (en) * | 2019-10-17 | 2021-04-20 | 成都鼎桥通信技术有限公司 | Method, device and equipment for protecting application operation and readable storage medium |
| CN111930481A (en) * | 2020-07-16 | 2020-11-13 | 重庆帮企科技集团有限公司 | Android system-based process priority improving method and device |
| CN112988282B (en) * | 2021-04-27 | 2021-08-20 | 荣耀终端有限公司 | Application keep-alive method and terminal equipment |
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