CN114201318B - Display method of Toast in multi-window mode in android compatible environment - Google Patents

Display method of Toast in multi-window mode in android compatible environment Download PDF

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CN114201318B
CN114201318B CN202210144267.2A CN202210144267A CN114201318B CN 114201318 B CN114201318 B CN 114201318B CN 202210144267 A CN202210144267 A CN 202210144267A CN 114201318 B CN114201318 B CN 114201318B
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温研
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Beijing Linzhuo Information Technology Co Ltd
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • 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
    • G06F9/46—Multiprogramming arrangements
    • G06F9/54—Interprogram communication
    • G06F9/546—Message passing systems or structures, e.g. queues
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • 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
    • G06F9/46—Multiprogramming arrangements
    • G06F9/54—Interprogram communication
    • G06F9/547—Remote procedure calls [RPC]; Web services
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2209/00—Indexing scheme relating to G06F9/00
    • G06F2209/54—Indexing scheme relating to G06F9/54
    • G06F2209/544—Remote
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2209/00—Indexing scheme relating to G06F9/00
    • G06F2209/54—Indexing scheme relating to G06F9/54
    • G06F2209/545—Gui
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2209/00—Indexing scheme relating to G06F9/00
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Abstract

The invention discloses a display method of Toast in a multi-window mode in an android compatible environment, which ensures the accuracy and effectiveness of Toast display of an android system in the android compatible environment in the multi-window mode by classifying and marking Toast layers and determining different display modes according to the classifying and marking Toast so as to improve the experience of a user in using android applications in a desktop system.

Description

Display method of Toast in multi-window mode in android compatible environment
Technical Field
The invention belongs to the technical field of development of installing mobile application on a desktop operating system, and particularly relates to a display method of Toast in a multi-window mode in an android compatible environment.
Background
The android compatible environment (hereinafter abbreviated as android compatible environment) of the Linux operating system is a technology for running android applications (apps) on the Linux operating system, and has important significance for enriching the application ecology of the Linux operating system. The xDroid is a typical Linux operating system android compatible environment, and compatibility of android application and a Linux operating system is achieved through coordination of the xDroid and the xDroid ui. In order to facilitate the user to operate multiple applications simultaneously, the android system introduced a multi-window mode starting from version 7.0, i.e., allowing the user to open multiple applications simultaneously in the same screen. Toast is a lightweight information reminding mechanism provided by the android system, is used for reminding an instant message to a user, is displayed on the uppermost layer of an application program interface, automatically disappears after being displayed for a period of time, does not interrupt the current operation, does not obtain a focus, and cannot be clicked. The layout design of Toast in the existing android system is very simple, and usually, views (views), such as text views (textviews) and picture views (imageviews), are inserted into a linear layout (linear layout) of a vertical layout to change the content of Toast.
However, when the multi-window mode of the android system is used in an android compatible environment, problems that the display position of the Toast is wrong or the display of the Toast cannot correspond to the android application and the like can be caused by adopting the existing Toast display mode.
Disclosure of Invention
In view of this, the present invention provides a method for displaying Toast in a multi-window mode in an android compatible environment, which can achieve flexible display of Toast in the multi-window mode of an android system according to a creating manner of Toast.
The invention provides a display method of Toast in a multi-window mode in an android compatible environment, which comprises the following steps:
step 1, when an android compatible environment monitors Toast to be displayed, determining a task ID corresponding to the Toast, and adding the task ID into a layer name corresponding to the Toast; when the Toast is created by the android system, the value of the TaskID is a set identification value;
step 2, the android system constructs a Toast display message containing the layer name, a Toast display size, a Toast center point coordinate and a Toast display content, and sends the Toast display message to an android application display program on the Linux system;
step 3, after the android application display program receives the Toast display message, judging whether the Toast display message is related to the Toast according to the layer name, if so, executing step 4, and if not, executing step 5; if not, executing step 4;
step 4, the android application display program displays the Toast display content in the Toast display message in a window of the taskbar by adopting a Linux system method;
and 5, reconstructing a Toast layer by the android application display program according to the Toast display message and displaying the reconstructed Toast layer in the corresponding android application window.
Further, if the correlation is performed in step 3 and the value of the task id is the set identification value, the following steps may be further performed:
3.1, the android application display program takes the android application window positioned at the topmost layer in the current Linux system as a target display window;
step 3.2, recalculating a new central point coordinate of the Toast in the target display window according to the display size and the upper left corner coordinate of the target display window, and calculating to obtain the upper left corner coordinate of the Toast according to the new central point coordinate and the Toast display size;
and 3.3, adding Toast to the foremost end of the layer list of the target display window, and drawing each layer according to the layer list.
Further, the manner in which the android application display program reconstructs the Toast layer according to the Toast display message and displays the Toast layer in the corresponding android application window in the step 5 includes:
step 5.1, the android application display program takes the android application windows with the same task ID in the current Linux system as target display windows;
step 5.2, recalculating a new central point coordinate of the Toast in the target display window according to the display size and the upper left corner coordinate of the target display window, and calculating to obtain the upper left corner coordinate of the Toast according to the new central point coordinate and the Toast display size;
and 5.3, adding Toast to the foremost end of the layer list of the target display window, and drawing each layer according to the layer list.
Further, the Toast display message also comprises a display time stamp, and the display time stamp is the generation time of Toast in the android system.
Further, when the android application display program executes the step 3.2, forming a Toast sequence according to the display time stamps from first to last; in step 3.3, the Toast sequence is added to the top of the layer list of the target display window.
Further, when the android application display program executes the step 5.2, forming a Toast sequence according to the display time stamps from first to last; in step 5.3, the Toast sequence is added to the top of the layer list of the target display window.
Further, in the step 5.2, according to the display size and the upper-left corner coordinate of the target display window, the manner of recalculating the new center point coordinate of Toast in the target display window is as follows:
acquiring the display size and the upper left corner coordinate of the target display window and the actual size of the physical screen, and taking the ratio of the size of the target display window to the size of the physical screen as a display proportion k; wherein the coordinate of the upper left corner of the target display window is marked as (x)m, ym) Toast center coordinates are (x)c, yc) The new center point coordinate of Toast is recorded as (x)c ′, yc ′) (ii) a According to xc ′= kxc，yc ′= kycCalculating to obtain the coordinates of the new center point of Toast; according to xt = xc ′-w/2，yt = yc ′H/2 calculating the coordinates (x) of upper left corner of Toastt, yt）。
Further, in the step 3.2, according to the display size and the upper-left corner coordinate of the target display window, the manner of recalculating the new center point coordinate of Toast in the target display window is as follows:
acquiring the display size and the upper left corner coordinate of the target display window and the actual size of the physical screen, and taking the ratio of the size of the target display window to the size of the physical screen as a display proportion k; wherein the coordinate of the upper left corner of the target display window is marked as (x)m, ym) The Toast center point coordinate is (x)c, yc) The new center point coordinate of Toast is recorded as (x)c ′, yc ′) (ii) a According to xc ′= kxc，yc ′= kycCalculating to obtain the coordinates of the new center point of Toast; according to xt = xc ′-w/2，yt = yc ′H/2 calculating the coordinates (x) of upper left corner of Toastt, yt）。
Further, when the android application display program reconstructs the Toast layer according to the Toast display message and displays the Toast layer in the corresponding android application window in the step 5, the display size of the Toast is scaled in an equal proportion according to the ratio of the size of the corresponding android application window to the size of the physical screen.
Has the advantages that:
1. according to the method and the device, the Toast layer is classified and marked, and different display modes are determined according to the classified and marked Toast, so that the accuracy and the effectiveness of Toast display of the android system in the android compatible environment in the multi-window mode are guaranteed, and the experience of using android applications in a desktop system by a user is improved.
2. According to the method and the device, the display time stamp is added to the Toast layer, the android application display program sequentially displays the Toast layer according to the time sequence of the display time stamp, and the display order of the Toast layer is improved on the basis of ensuring the accuracy and effectiveness of Toast display of an android system in an android compatible environment in a multi-window mode.
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Fig. 1 is a flowchart of a method for displaying Toast in a multi-window mode in an android compatible environment according to the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
In the android system, Toast can be created by an Activity instance (Activity) in an application program or by the android system, the Activity instance has a unique task ID when the Activity instance (Activity) is created, the corresponding relation between Toast and the application program can be obtained through the task ID, specifically, a program package name can be obtained through the task ID, and the specific android application program can be judged according to the package name; when created by the android system, the task ID corresponds to a thread of a certain android system.
The invention provides a display method of Toast in a multi-window mode in an android compatible environment, the flow is shown in figure 1, and the method specifically comprises the following steps:
step 1, when the android compatible environment monitors Toast needing to be displayed, determining a task ID corresponding to the Toast, and adding the task ID into a Layer (Layer) name corresponding to the Toast.
The method for monitoring Toast needing to be displayed in the android compatible environment can be realized by modifying a display function (show function) of a Toast class in an android system.
The android system determines a value of the task ID according to a main body for creating the Toast, and specifically, if the Toast is created by an application program, the task ID of an Activity instance (Activity) for creating the Toast in the application program is obtained in an android compatible environment; and if the Toast is created by the android system, taking the TaskID as a set identification value. Then, the task id is added to the name of the Layer (Layer) corresponding to the Toast, for example, the Layer where the Toast is located is named as "Toast task id" to identify the corresponding relationship between the Toast and the application or the android system.
In general, the value of the TaskID in the android system is a non-negative integer, so the value of the TaskID can be set to 0 for the Toast created by the android system.
Further, in order to ensure that all toasts in the android system can be completely displayed according to the time sequence, when the android compatible environment monitors the toasts to be displayed, the android system establishes a current display time stamp to identify the generation time of each Toast. And the display timestamp is the generation time of Toast in the android system.
And 2, the android system constructs a Toast display message containing information such as layer names, Toast display sizes, Toast center point coordinates, Toast display contents and the like, and sends the Toast display message to an android application display program running on the Linux system.
The Toast display content is displayable content and layout of each sub View in the Toast, and the displayable content includes all display contents such as text content and image content.
In the implementation process, the View corresponding to the Toast can be obtained by calling a getView () method of the Toast object in the android system, and all views in the Toast can be obtained by circularly calling a linear layout type getchild At (i) method. The following code may be used to implement:
LinearLayout toastView = (LinearLayout) toast.getView();
for (int i = 0; i < toastView.getChildCount (); ++ i)
{
View child = toastView.getChildAt (i);
}
wherein, aiming at the types of the child, namely the types of TextView, ImageView, ViewGroup and the like, different information of the child is obtained.
The method can send the Toast display message to the android application display program in an asynchronous RPC calling mode. According to the Toast implementation mechanism of the android system, if the Linux system has a long processing time and the result returned to the android system is overtime, exception is thrown in the Toast processing process, so that the message is sent in an asynchronous RPC calling mode. For an android compatible environment xDroid, the android application display program is xDroid ui.
Further, in order to ensure that all toasts in the android system can be completely displayed according to the time sequence, a display time stamp needs to be added to the Toast display message, and at this time, the Toast display message includes information such as a layer name, a Toast display size, a Toast center point coordinate, Toast display content, and the display time stamp.
Step 3, when the android application display program receives a Toast display message, judging whether the current message is a message related to Toast display according to the layer name in the Toast display message, if so, extracting the task ID in the layer name, if the value of the task ID is a set identification value, executing the step 4 or the step 5, and if the value of the task ID is a non-set identification value, executing the step 6; if not, the Toast display message is taken as a system message, and step 5 is executed.
And 4, the android application display program displays the Toast represented by the Toast display message in the top android application window which is positioned at the topmost layer in the current Linux system.
When the TaskID value is the set identification value, it is described that the Toast is created by the android system, and does not correspond to a specific android application, so that, for the convenience of observation of a user, the best mode is to display the Toast on the topmost layer of an android application window displayed by the current Linux system, and the specific process includes the following steps:
and 4.1, the android application display program acquires a top android application window at the topmost layer in a plurality of android application windows displayed in the current Linux system, and the top android application window is used as a target display window.
And 4.2, recalculating a new central point coordinate due to the Toast display in the target display window according to the display size and the upper left corner coordinate of the target display window, and calculating to obtain the upper left corner coordinate of the Toast layer according to the new central point coordinate and the Toast display size.
And 4.3, adding the Toast layer to the foremost end or the first position of the layer list of the target display window to ensure that the Toast layer is displayed on the topmost layer, and respectively drawing each layer according to the layer list, the display size and the upper left corner coordinate. And the android application display program adopts OpenGL or OpenGL ES to complete drawing of the layer.
Further, for the Toast display message with the added display timestamp, after the android application display program executes the step 4.1, the display timestamp is extracted from the received Toast display message, and the step 4.2 is executed for different toasts according to the sequence of the display timestamps, so that the display size and the upper left-hand coordinate of each Toast are obtained, and a Toast sequence to be displayed is formed according to the sequence of the display timestamps from first to last; the Toast sequence is added to the top or first digit of the layer list of the top android application window in step 4.3.
And 5, the android application display program extracts the Toast display content in the Toast display message from the received Toast display message, and displays the Toast display content in the window of the taskbar by adopting a Linux system method.
For example, a thread for receiving the Toast display message is set in the xdroid ui, when the thread receives a message with a TaskID of 0, the Toast display contents in the Toast display message are sequentially extracted according to the sequence of timestamps in the Toast display message, and then a Linux related interface is called to display the prompt information of the task bar. The method for displaying Toast display content by the Linux system comprises the following steps: and all views in the Toast display content form a View set, a Linux prompt window Widget is reconstructed according to the View set, each View in the View set corresponds to one sub Widget of the prompt window Widget, and each sub Widget is constructed by adopting the layout of the View. If the View adopts the layout as an absolute layout (Absolute layout), the size and the coordinates of each element in the layout need to be scaled by the same proportion, and the scaling is the ratio of the dimension of the Toast display in the Toast display message to the dimension of the Linux prompt window.
Further, for the Toast display message with the added display timestamp, the android application display program extracts the display timestamp from the received Toast display message, sequentially extracts Toast display contents in the Toast display message according to the sequence of the display timestamp, and displays the Toast display contents in a window of the task bar by adopting a Linux system method.
And 6, reconstructing a Toast layer by the android application display program according to the Toast display message, and displaying the obtained layer in the android application window corresponding to the obtained layer.
And 6.1, traversing all android application windows displayed in the current Linux system by the android application display program, and finding the android application window corresponding to the Toast display message as a target display window according to the TaskID in the Toast display message.
And 6.2, recalculating a new central point coordinate due to the Toast display in the target display window according to the display size and the upper left corner coordinate of the target display window, and calculating to obtain the upper left corner coordinate of the Toast layer according to the new central point coordinate and the Toast display size.
And 6.3, adding the Toast layer to the foremost end or the first position of the layer list of the target display window to ensure that the Toast layer is displayed on the topmost layer, and drawing each layer according to the layer list. And the android application display program adopts OpenGL or OpenGL ES to complete drawing of the layer.
Further, for the Toast display message with the added display timestamp, after the android application display program executes step 6.1, the display timestamp is extracted from the received Toast display message, and step 6.2 is executed for different toasts according to the sequence of the display timestamps, so that a new display size and an upper left-hand coordinate of each Toast are obtained, and a Toast sequence to be displayed is formed according to the sequence of the display timestamps from first to last; in step 6.3 the Toast sequence is added to the top or first position of the layer list of the target display window.
In the existing android system, the implementation mechanism of Toast determines that the central point coordinate of Toast is relative to the screen of the display connected with the physical host, and in the android compatible environment, the central point coordinate of Toast is still determined relative to the screen of the display connected with the host where the Linux system is located. Therefore, in the present invention, the new center point coordinate of Toast displayed in the target display window is recalculated according to the display size and the upper left corner coordinate of the target display window in step 4.2 and step 6.2, and the calculation process of the new center point coordinate of Toast is as follows:
s1, acquiring the display size of the target display window and the actual size of the physical screen, and acquiring the ratio of the size of the target display window to the size of the physical screen as a display proportion k. Wherein, the Toast display size is marked as (w, h), and the coordinates of the Toast central point are marked as (x)c, yc) The new center point coordinate of Toast is recorded as (x)c ′, yc ′）。
S2, calculating to obtain the coordinates of the new center point of Toast according to the display proportion k and the coordinates of the center point of Toast, wherein the calculation mode is as follows: x is the number ofc ′= kxc，yc ′= kyc。
S3, obtaining the coordinates (x) of the upper left corner of Toast according to the coordinates of the new center point of Toast and the display size of Toastt, yt) The calculation method is as follows: x is the number oft = xc ′-w/2，yt = yc ′-h/2。
Further, in order to achieve a better display effect, the display size of Toast in step 4.2 and step 6.2 is recalculated according to the size of the target display window, and the calculation method is to obtain the new display size of Toast by scaling the ratio of the target display window to the physical screen size, which is specifically expressed as follows:
the display size of Toast is marked as (w, h), and the new display size of Toast is marked as (w)′, h′) Then w is′= kw，h′= kh; at this time, the coordinate (x) of upper left corner of Toastt, yt) The calculation method of (c) is as follows: x is the number oft = xc ′- w′/2，yt = yc ′- h′/2。
In addition, because the displayable time of the Toast is determined in the implementation mechanism of the Toast, in order to achieve the optimal display effect, namely the next Toast is displayed after the current Toast disappears, when the acquired Toast display message has a display time stamp, the time interval control mechanism is added when the Toast layers of all the layers are drawn.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present 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 (7)

1. A method for displaying Toast in a multi-window mode in an android compatible environment is characterized by comprising the following steps:
step 1, when an android compatible environment monitors Toast to be displayed, determining a task ID corresponding to the Toast, and adding the task ID into a layer name corresponding to the Toast; when the Toast is created by the android system, the value of the TaskID is a set identification value;
step 2, the android system constructs a Toast display message containing the layer name, a Toast display size, a Toast central point coordinate and Toast display content, and sends the Toast display message to an android application display program on the Linux system;
step 3, after the android application display program receives the Toast display message, judging whether the Toast display message is related to the Toast according to the layer name, if so, executing step 4, and if not, executing step 5; if not, executing step 4;
step 4, the android application display program displays the Toast display content in the Toast display message in a window of the taskbar by adopting a Linux system method;
step 5, the android application display program reconstructs a Toast layer according to the Toast display message and displays the Toast layer in a corresponding android application window;
the method for reconstructing the Toast layer according to the Toast display message and displaying the reconstructed Toast layer in the corresponding android application window by the android application display program in the step 5 comprises the following steps:
step 5.1, the android application display program takes the android application windows with the same task ID in the current Linux system as target display windows;
step 5.2, recalculating a new central point coordinate of the Toast in the target display window according to the display size and the upper left corner coordinate of the target display window, and calculating to obtain the upper left corner coordinate of the Toast according to the new central point coordinate and the Toast display size;
and 5.3, adding Toast to the foremost end of the layer list of the target display window, and drawing each layer according to the layer list.
2. The display method according to claim 1, wherein if the correlation is made in step 3 and the TaskID value is a set identification value, the following steps are further performed:
3.1, the android application display program takes the android application window positioned at the topmost layer in the current Linux system as a target display window;
step 3.2, recalculating a new central point coordinate of the Toast in the target display window according to the display size and the upper left corner coordinate of the target display window, and calculating to obtain the upper left corner coordinate of the Toast according to the new central point coordinate and the Toast display size;
and 3.3, adding Toast to the foremost end of the layer list of the target display window, and drawing each layer according to the layer list.
3. The display method according to claim 2, wherein the Toast display message further includes a display time stamp, and the display time stamp is the generation time of Toast in the android system; when the android application display program executes the step 3.2, forming a Toast sequence according to the sequence of the display time stamps from first to last; in step 3.3, the Toast sequence is added to the top of the layer list of the target display window.
4. The display method according to claim 1, wherein the Toast display message further includes a display time stamp, and the display time stamp is the generation time of Toast in the android system; when the android application display program executes the step 5.2, forming a Toast sequence according to the sequence of the display time stamps from first to last; in step 5.3, the Toast sequence is added to the top of the layer list of the target display window.
5. The display method according to claim 1, wherein in the step 5.2, according to the display size and the upper left corner coordinate of the target display window, the new center point coordinate of Toast in the target display window is recalculated in a manner that:
acquiring the display size and the upper left corner coordinate of the target display window and the actual size of the physical screen, and taking the ratio of the size of the target display window to the size of the physical screen as a display proportion k; wherein the coordinate of the upper left corner of the target display window is marked as (x)m,ym) The Toast center point coordinate is (x)c,yc) The new center point coordinate of Toast is recorded as (x)c ′,yc ′) (ii) a According to xc ′＝kxc，yc ′＝kycCalculating to obtain the coordinates of the new center point of Toast; according to xt＝xc ′-w/2，yt＝yc ′H/2 calculating the coordinates (x) of upper left corner of Toastt,yt)。
6. The display method according to claim 2, wherein in the step 3.2, according to the display size and the upper left corner coordinate of the target display window, the new center point coordinate of Toast in the target display window is recalculated in a manner that:
acquiring the display size and the upper left corner coordinate of the target display window and the actual size of the physical screen, and taking the ratio of the size of the target display window to the size of the physical screen as a display proportion k; wherein the coordinate of the upper left corner of the target display window is marked as (x)m,ym) The Toast center point coordinate is (x)c,yc) Toast new center coordinates are marked as (x)c ′,yc ′) (ii) a According to xc ′＝kxc，yc ′＝kycCalculating to obtain the coordinates of the new center point of Toast; according to xt＝xc ′-w/2，yt＝yc ′-h/2 calculating the coordinates (x) of upper left corner of Toastt,yt)。
7. The display method according to claim 1, wherein in the step 5, when the android application display program reconstructs the Toast layer according to the Toast display message and displays the Toast layer in the corresponding android application window, the display size of the Toast is scaled according to the ratio of the corresponding android application window to the physical screen size.
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