CN113672407A - Linux-compatible Android keyboard input control method and device - Google Patents
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- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
- G06F3/0233—Character input methods
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Abstract
The invention discloses a Linux-compatible Android keyboard input control method and device, which are used for judging whether an Android application window is in an active or inactive state; if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the key of the keyboard is in an initial state, and displaying the character of the pressed key according to the non-initial state information of the keyboard key and the key value information of the keyboard key pressed by the user; and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state. The problem that the button states of the Android application and the Linux system are inconsistent is solved, and the keyboard input experience of a user in the Linux-compatible Android environment is improved.
Description
Technical Field
The invention relates to the field of computer operating systems, in particular to a Linux-Android-compatible keyboard input control method and device.
Background
In order to ensure that each active Android application can be consistent with the key state of the Linux system, the following scheme is mainly adopted:
the first scheme is as follows: and acquiring all key events at the Linux side.
Starting a key input monitoring process at a Linux side, continuously acquiring key operation of a user, sending all key operation of the Linux side to an Android side, and sending a key event to active Android application by the Android side. This solution has two drawbacks:
1. all key operations on the Linux system are sent, and unnecessary work is performed.
The following two scenarios may receive, process, and transmit unnecessary key input events.
Scene a: when the Android application is not started, the key input event can still be processed.
Since the Android application runs in the Linux-compatible Android environment and the Android application runs in the Linux system, when a user just starts a machine, the Linux-compatible Android environment and the Android application are not run, and at the moment, if the user performs key operation, the key input monitoring process at the Linux side still obtains the key operation of the user, so that a large amount of unnecessary work is performed.
Scene b: when the non-Android application is operated, the key input event can still be received. If the user does not operate the Android application but operates other applications of the Linux system, the key input is sent to the Android, and a large amount of unnecessary work is performed.
2. The Android application still cannot acquire all the required key operations on the Linux system.
Scene c: and when the Android application receives the key pressing event, the keyboard state is inconsistent with the Linux system.
After the keyboard is started, a user clicks and releases the Caps Lock key, so that a Caps Lock lamp on the keyboard is lightened, and the keyboard is switched to a capitalization state. At this time, the Android system is not started yet, so that a Caps Lock key input message cannot be sent to the Android system. Then, the user starts the Android system and starts certain Android application, and then presses the key A. Since the Android application does not receive the Caps Lock key in advance, the Android application may consider that the user has input a lower case "a". However, at this time, Caps Lock of the keyboard is in a lighting state, that is, in an uppercase state, and at this time, the key states of the Android application and the Linux system are not consistent.
Scheme II: and acquiring key input through the Android application display window and sending the key input to the Android system.
The Android application display window is realized through qt (application program development framework), and according to characteristics of the qt program, when the Android application display window is in an active state, a key event can be received, so that unnecessary key input events in the above scene a and scene b can be filtered out. This solution still has the drawbacks: the Android application still cannot acquire all the required key operations on the Linux system.
This solution still fails to solve the problems of the above scenario c and the following scenario d.
Scene d: after the Android application display page loses focus, part of keys are not released and are mistakenly judged to be long-pressed keys. A user presses a certain key A on an Android application display page, and clicks other applications under the condition that the key A is not loosened, so that the Android application display page loses focus, and due to the characteristics of a qt program, the Android application display page cannot acquire a loosening event of the key A. The Android application can determine that the key A is in a long-press state, so that the key states of the Android application and the Linux system are inconsistent.
Disclosure of Invention
In order to solve the problem that the key states of an Android application and a Linux system keyboard are inconsistent in a Linux Android compatible environment, the invention provides a Linux Android compatible keyboard input control method and device.
On one hand, the invention provides a Linux-compatible Android keyboard input control method, which comprises the following steps:
step S1: judging whether the Android application window is in an active or inactive state;
step S2: if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the keys of the keyboard are in an initial state, if the keys of the keyboard are in the initial state, pressing the keys of the keyboard by a user, sending key value information of the keys of the keyboard pressed by the user to an Android side by Linux, and displaying characters of the pressed keys by the Android side; the initial state is a keyboard default state after the terminal is started;
if the keys of the keyboard are in the non-initial state, Linux sends the non-initial state information of the keys of the keyboard to the Android side; a user presses down a keyboard key, and the Linux sends key value information of the keyboard key pressed down by the user to the Android side; the Android side displays characters of the pressed keys according to the non-initial state information of the keyboard keys and key value information of the keyboard keys pressed by the user;
and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state.
Further, in the method, the Android side displays the characters of the pressed keys, specifically:
when the Android application window is in an active state, a key input event of the Linux system is received, the Android application window sends the key input event to the Android system, the Android system forwards the key input event to the currently active Android application, and after the currently active Android application updates an Android application window page, characters of a pressed key are displayed in an input box.
Further, the non-initial state of the keys of the keyboard comprises:
the case Lock keys Caps Lock are in a lit state, the combination keys Shift, Ctrl, Alt are in a pressed state, and the keypad number Lock key Num Lock is in a lit state.
Further, if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state, including:
and releasing the pressed key of the Android application window before the Android application window is changed into the inactive state.
On the other hand, the invention provides a Linux-compatible Android keyboard input control device, which comprises:
a memory for storing a program;
a processor for executing the program stored in the memory, the processor being configured to, when the program stored in the memory is executed:
judging whether the Android application window is in an active or inactive state;
if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the keys of the keyboard are in an initial state, if the keys of the keyboard are in the initial state, pressing the keys of the keyboard by a user, sending key value information of the keys of the keyboard pressed by the user to an Android side by Linux, and displaying characters of the pressed keys by the Android side; the initial state is a keyboard default state after the terminal is started;
if the keys of the keyboard are in the non-initial state, Linux sends the non-initial state information of the keys of the keyboard to the Android side; a user presses down a keyboard key, and the Linux sends key value information of the keyboard key pressed down by the user to the Android side; the Android side displays characters of the pressed keys according to the non-initial state information of the keyboard keys and key value information of the keyboard keys pressed by the user;
and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state.
Further, the processor is configured to:
when the Android application window is in an active state, a key input event of the Linux system is received, the Android application window sends the key input event to the Android system, the Android system forwards the key input event to the currently active Android application, and after the currently active Android application updates an Android application window page, characters of a pressed key are displayed in an input box.
Further, the non-initial state of the keys of the keyboard comprises:
the case Lock keys Caps Lock are in a lit state, the combination keys Shift, Ctrl, Alt are in a pressed state, and the keypad number Lock key Num Lock is in a lit state.
Further, the processor is configured to:
and releasing the pressed key of the Android application window before the Android application window is changed into the inactive state.
Compared with the prior art, the invention has the following advantages:
in the environment of Linux compatible with Android, when a user uses Android application and a keyboard operates case keys, combination keys, keypad numeric keys and the like, the keyboard state of the Android application can be kept consistent with that of a Linux system.
And before the Android application window exits from the active state, the Android application can keep consistent with the key state of the Linux system.
The method and the device solve the problem that the key states of the Android application and the Linux system are inconsistent, and improve the keyboard input experience of a user in the Linux-compatible Android environment.
Drawings
Fig. 1 is a schematic diagram illustrating a Linux-compatible Android keyboard input control method according to an embodiment of the present invention;
fig. 2 is a schematic composition diagram of a Linux-compatible Android keyboard input control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
For the environment compatible with Android running on the Linux operating system, the Android running environment runs in a container.
Containers are a lightweight virtualization technology supported by the Linux kernel in recent years. A new Linux system (including other systems customized based on the Linux system, such as Android) can be operated in the Linux system through a container technology, and a client system and a host system are isolated from each other through the container. Different from the traditional scheme based on the virtual machine technology, in the container technology, the client system and the host system share resources such as a CPU (central processing unit), a memory, storage and the like, and the resource overhead is low. In addition, through proper configuration, the client system can directly access the hardware resource of the host, and the performance of the client system is further improved.
According to the characteristics of computer physical keys on the Linux system, each key corresponds to one scan code, and the scan code of each key is unique. The correspondence table of key scan code codes on the Linux system may refer to an input-event-codes.h header file:
#define KEY_ESC 1
#define KEY_1 2
#define KEY_2 3
#define KEY_A 30
when a user runs an Android application in an Android environment compatible with the running of the Android application on a Linux operating system and performs key input, a scan code (scan code) of a key needs to be sent to the Android system. Due to the uniqueness of the scan code, no matter in an uppercase state or a lowercase state, when a user presses a key A, the Android application display window sends 30 (a scanning code corresponding to the key A) to the Android system. And the Android system cannot distinguish the case from case, so the state of the keyboard needs to be synchronously sent to the Android system, and the condition that each active Android application can be consistent with the key state of the Linux system is ensured.
Fig. 1 is a Linux-compatible Android keyboard input control method provided in an embodiment of the present invention, including the following steps:
step S1: judging whether the Android application window is in an active or inactive state;
step S2: if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the keys of the keyboard are in an initial state, if the keys of the keyboard are in the initial state, pressing the keys of the keyboard by a user, sending key value information of the keys of the keyboard pressed by the user to an Android side by Linux, and displaying characters of the pressed keys by the Android side; the initial state is a keyboard default state after the terminal is started;
if the keys of the keyboard are in the non-initial state, Linux sends the non-initial state information of the keys of the keyboard to the Android side; a user presses down a keyboard key, and the Linux sends key value information of the keyboard key pressed down by the user to the Android side; the Android side displays characters of the pressed keys according to the non-initial state information of the keyboard keys and key value information of the keyboard keys pressed by the user;
and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state.
The Android application display window is a window program realized through QT, and is mainly realized through QSinow class and QWidget class of QT. Acquiring an event that the window enters an active state by rewriting an event function, namely, a pool event (QEVent); the event function can get a message that a window of QWindow or QWidget goes active, i.e. the window goes active when (e- > type () equals QEVent:: WindowActivate.
The Android application display window entering the active state is responsible for a component communicating with the Android side through the Linux side through the socket, information containing Android application id is sent to the component responsible for interaction with the Linux on the Android side, and the component responsible for interaction with the Linux on the Android side records the application id of the currently active Android application. The recording of the application id is to make the Android system know in which Android application the subsequent key input operation is performed.
The Android application display window is a window program realized through QT, and the pressing and releasing events of the keys can be received only when the Android application display window is in an active state.
Further, in the method, the Android side displays the characters of the pressed keys, specifically:
when the Android application window is in an active state, a key input event of the Linux system is received, the Android application window sends the key input event to the Android system, the Android system forwards the key input event to the currently active Android application, and after the currently active Android application updates an Android application window page, characters of a pressed key are displayed in an input box.
Further, the non-initial state of the keys of the keyboard comprises:
the case Lock keys Caps Lock are in a lit state, the combination keys Shift, Ctrl, Alt are in a pressed state, and the keypad number Lock key Num Lock is in a lit state.
For the QSinow and QWidget classes, a mouse click event, namely void keyPressage event (QKeyEvent) is obtained by rewriting the keyPressage function; the keyPresssevent function can get a mouse down event message for QWindow or QWidget when event- > key () represents the key value of the pressed key. event- > native modifiers () represents various state values of the keyboard when a key is pressed, including: the state of the case Lock key Caps Lock (whether Caps Lock is on), the state of the combination key (whether shift, ctrl, alt, etc. are in a pressed state), and the state of the keypad numeric key Lock key Num Lock (whether Num Lock lamp is on).
After the Android application display window detects the state of the keyboard, the Android application display window sends a state key pressing and releasing event of the keyboard to Android through the key information sending module according to the state information. For example: and if the condition that the Caps Lock of the case Lock key is in the open state is detected, sending the pressing and releasing events of the case Lock key to the Android. And if the shift is detected to be in a pressed state, sending a shift key pressing event to the Android.
Further, if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state, including:
and releasing the pressed key of the Android application window before the Android application window is changed into the inactive state.
A QWindow class and a QWidget class of QT, and an event that a window enters an active state, namely, a pool event (QEVent) is obtained by rewriting an event function; the event function can get a message that a window of QWindow or QWidget enters active, i.e. the window exits active when (e- > type () equals QEVent:: windowDeactivate.
The Android application display window is a window program realized through QT, and the pressing and releasing events of the keys can be received only when the Android application display window is in an active state. And if the release event of the key A is not sent to the Android before the Android application display window exits from the active state. And the Android application display window can not receive the release event of the key A after exiting the active state. Therefore, the Android application cannot receive a release event of the key A, and the Android application is always in a pressed state of the key A, namely a long-time pressed state of the key A. Therefore, before the Android application display window exits from the active state, a release event of the key A needs to be sent to the Android.
Fig. 2 is a Linux-compatible Android keyboard input control apparatus according to an embodiment of the present invention, where the apparatus includes:
a memory for storing a program;
a processor for executing the program stored in the memory, the processor being configured to, when the program stored in the memory is executed:
judging whether the Android application window is in an active or inactive state;
if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the keys of the keyboard are in an initial state, if the keys of the keyboard are in the initial state, pressing the keys of the keyboard by a user, sending key value information of the keys of the keyboard pressed by the user to an Android side by Linux, and displaying characters of the pressed keys by the Android side; the initial state is a keyboard default state after the terminal is started;
if the keys of the keyboard are in the non-initial state, Linux sends the non-initial state information of the keys of the keyboard to the Android side; a user presses down a keyboard key, and the Linux sends key value information of the keyboard key pressed down by the user to the Android side; the Android side displays characters of the pressed keys according to the non-initial state information of the keyboard keys and key value information of the keyboard keys pressed by the user;
and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state.
Further, the processor is configured to:
when the Android application window is in an active state, a key input event of the Linux system is received, the Android application window sends the key input event to the Android system, the Android system forwards the key input event to the currently active Android application, and after the currently active Android application updates an Android application window page, characters of a pressed key are displayed in an input box.
Further, the non-initial state of the keys of the keyboard comprises:
the case Lock keys Caps Lock are in a lit state, the combination keys Shift, Ctrl, Alt are in a pressed state, and the keypad number Lock key Num Lock is in a lit state.
Further, the processor is configured to:
and releasing the pressed key of the Android application window before the Android application window is changed into the inactive state.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A Linux-compatible Android keyboard input control method is characterized by comprising the following steps:
step S1: judging whether the Android application window is in an active or inactive state;
step S2: if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the keys of the keyboard are in an initial state, if the keys of the keyboard are in the initial state, pressing the keys of the keyboard by a user, sending key value information of the keys of the keyboard pressed by the user to an Android side by Linux, and displaying characters of the pressed keys by the Android side; the initial state is a keyboard default state after the terminal is started;
if the keys of the keyboard are in the non-initial state, Linux sends the non-initial state information of the keys of the keyboard to the Android side; a user presses down a keyboard key, and the Linux sends key value information of the keyboard key pressed down by the user to the Android side; the Android side displays characters of the pressed keys according to the non-initial state information of the keyboard keys and key value information of the keyboard keys pressed by the user;
and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state.
2. The Linux-compatible Android keyboard input control method of claim 1, wherein in the method, the Android side displays characters of pressed keys, specifically:
when the Android application window is in an active state, a key input event of the Linux system is received, the Android application window sends the key input event to the Android system, the Android system forwards the key input event to the currently active Android application, and after the currently active Android application updates an Android application window page, characters of a pressed key are displayed in an input box.
3. The Linux-compatible Android keyboard input control method of claim 1, wherein the non-initial state of the keys of the keyboard comprises:
the case Lock keys Caps Lock are in a lit state, the combination keys Shift, Ctrl, Alt are in a pressed state, and the keypad number Lock key Num Lock is in a lit state.
4. The Linux-compatible Android keyboard input control method of claim 1, wherein if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state comprises:
and releasing the pressed key of the Android application window before the Android application window is changed into the inactive state.
5. A Linux-compatible Android keyboard input control apparatus, comprising:
a memory for storing a program;
a processor for executing the program stored in the memory, the processor being configured to, when the program stored in the memory is executed:
judging whether the Android application window is in an active or inactive state;
if the Android application window is in an active state, detecting the key state of the keyboard, judging whether the keys of the keyboard are in an initial state, if the keys of the keyboard are in the initial state, pressing the keys of the keyboard by a user, sending key value information of the keys of the keyboard pressed by the user to an Android side by Linux, and displaying characters of the pressed keys by the Android side; the initial state is a keyboard default state after the terminal is started;
if the keys of the keyboard are in the non-initial state, Linux sends the non-initial state information of the keys of the keyboard to the Android side; a user presses down a keyboard key, and the Linux sends key value information of the keyboard key pressed down by the user to the Android side; the Android side displays characters of the pressed keys according to the non-initial state information of the keyboard keys and key value information of the keyboard keys pressed by the user;
and if the Android application window is in an inactive state, restoring the key state of the keyboard to an initial state.
6. The Linux-compatible Android keyboard input control of claim 5, wherein the processor is configured to:
when the Android application window is in an active state, a key input event of the Linux system is received, the Android application window sends the key input event to the Android system, the Android system forwards the key input event to the currently active Android application, and after the currently active Android application updates an Android application window page, characters of a pressed key are displayed in an input box.
7. The Linux-compatible Android keyboard input control device of claim 5, wherein the non-initial state of the keys of the keyboard comprises:
the case Lock keys Caps Lock are in a lit state, the combination keys Shift, Ctrl, Alt are in a pressed state, and the keypad number Lock key Num Lock is in a lit state.
8. The Linux-compatible Android keyboard input control of claim 5, wherein the processor is configured to:
and releasing the pressed key of the Android application window before the Android application window is changed into the inactive state.
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