CN114296617B - Method for automatically switching playing video of android application - Google Patents
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Abstract
The invention discloses a method for automatically switching playing videos of android applications, which classifies the existing android applications based on different implementation modes, analyzes the video switching modes of the android applications, monitors the states of the android applications playing the current videos in different modes aiming at the android applications of different types, simulates the sliding operation of a user by adopting a touch simulation mode when the current video playing is finished, realizes the automatic switching of the video files played by the android applications, solves the problem that the existing android applications cannot automatically switch the video playing, effectively improves the convenience of operation, and improves the user experience.
Description
Technical Field
The invention belongs to the technical field of android application development, and particularly relates to a method for automatically switching playing videos of an android application.
Background
The android system is often published along with a series of core application packages, which typically include email clients, SMS messages programs, calendars, maps, browsers, and contact managers, among others. All application programs in the android system are written in Java language. In addition, developers can also develop android applications that meet specific functional requirements based on the android API framework, android architecture components, and other supporting libraries used by the core application. Many applications in the existing android applications have modules supporting a short video playing function, such as tremble, fast-hand, today's first line, and the like, but in the process of playing a short video, if the current short video playing is finished, the android application user needs to manually switch to an adjacent video for playing, the requirement of the user for continuously and automatically playing the video cannot be met, and the user experience is reduced.
Disclosure of Invention
In view of this, the present invention provides a method for automatically switching and playing a video for an android application, which can implement automatic switching and playing of a video without user operation in the android application.
The invention provides a method for automatically switching playing videos of an android application, which comprises the following steps:
step 1, determining android applications to be monitored and video switching modes adopted by the android applications to be monitored, and establishing an android application directory containing the android application names, the android application types and the video switching modes of the android applications to be monitored; the android application types comprise an FFmpeg-based android application class, a MediaCodec-interface-based android application class and a third-party decoder-based android application class;
step 2, determining the android application type of the current android application according to the android application name of the current android application and the android application directory, executing step 3 if the current android application is an FFmpeg-based android application class, executing step 4 if the current android application is an android application class based on a MediaCodec interface, and executing step 5 if the current android application is an android application class based on a third-party decoder;
step 3, obtaining the frame rate of a current video file to be played by the current android application, if the interval time of the key frames is greater than or equal to the reciprocal of the frame rate, monitoring the return value of a video decoding function of the FFmpeg when the video is decoded to the last frame, and executing step 7 when the return value indicates that the current video frame is decoded; if the interval time of the key frames is less than the reciprocal of the frame rate, executing step 7 after waiting for a set time period when the return value indicates that the current video frame is decoded;
step 4, obtaining the frame rate of a current video file to be played by the current android application, if the interval time of key frames is greater than or equal to the reciprocal of the frame rate, monitoring the return value of the query decoding output function of the MediaCodec when the video is decoded to the last frame, and executing step 7 when the return value indicates that the current video frame is decoded; if the interval time of the key frames is less than the reciprocal of the frame rate, executing step 7 after waiting for a set time period when the return value indicates that the current video frame is decoded;
step 5, monitoring a progress attribute value of a progress bar control of the current android system, and executing step 6 if the progress attribute value is not obtained; if the progress attribute value is changed, executing the step 7 when the value reaches 100;
step 6, acquiring the time length of a current video file to be played by the current android application, starting timing when the current android application starts to play the current video file, and executing step 7 when the timing time is equal to the time length;
and 7, determining a video switching mode of the current android application according to the android application name of the current android application and the android application directory, and simulating the video switching mode to switch the video played by the currently running android application into an adjacent video file.
Further, in the step 1 of determining the android application to be monitored and the video switching mode adopted by the android application to be monitored, the process of determining the video switching mode of the android application to be monitored includes:
step 1.1, starting an android application to be monitored, and acquiring a view of a currently played video window;
step 1.2, acquiring a parent view of a currently played video window and other similar views with the same or similar structures as the view of the currently played video window in the parent view;
1.3, if the similar view and the view of the current playing video window are positioned in the left and right directions, the video switching mode of the android application to be monitored is left and right sliding switching; and if the similar view and the view of the current playing video window are positioned in the vertical direction, the video switching mode of the android application to be monitored is vertical sliding switching.
Further, the set time period is the reciprocal of the frame rate or 1/30 seconds.
Further, the manner of obtaining the duration of the current video file to be played by the current android application in step 6 is to use a video decoding engine to analyze the video packaging format and the encoding format of the video file to obtain the video duration.
Further, the manner of obtaining the duration of the current video file to be played by the current android application in step 6 is to obtain the duration of the network video stream when the video stream establishes a handshake connection based on a streaming media protocol by using a video decoding engine.
Further, in the step 6, in starting timing when the current android application starts playing the current video file, it is determined that the current android application starts playing the current video file in a manner that: and determining the starting time of playing the video file by detecting the state change of the SurfaceView.
Further, the process of simulating the video switching mode in step 7 is as follows: and continuously sending a group of touch event messages to the android environment to simulate touch sliding, wherein the touch event messages comprise an ACTION _ DOWN event message sent by a simulation touch point at a set starting position, an ACTION _ MOVE event message sent by the simulation touch point at a middle point position in the process of moving to an end position, and an ACTION _ UP event message sent by the simulation touch point after the simulation touch point reaches the end position.
Further, the coordinates (x ', y') of the midpoint location in the touch event message are determined in a manner of: if the current video switching mode of the android application is left-right sliding, (x ', y') is (x '= x ± t, y), and if the current video switching mode of the android application is up-DOWN sliding, (x', y ') is (x, y' = y ± t), where (x, y) is the starting point position coordinate, and t is the time waiting after sending the ACTION _ DOWN event message.
Further, the coordinate determination method of the starting point position and the ending point position is as follows:
step 9.1, detecting whether the currently displayed interface has the SurfaceView, if so, taking the central point of the SurfaceView as a starting position (x, y), and taking the central point as a set proportion of the offset screen height h or width w as an end position (x ', y'); the terminal position is (x '' = x +/-w/4, y) when the video switching mode is left-right sliding, and the terminal position is (x, y '' = y +/-h/4) when the video switching mode is up-down sliding; if no SurfaceView exists, executing step 9.2;
and 9.2, selecting the View with the largest size in the View tree of the currently displayed interface, and taking the center point as the starting point position (x, y) of the touch point.
Further, the starting point in the step 9.2 is the center point of the 5/6-sized rectangle with the largest size of View in the View tree of the currently displayed interface.
Has the advantages that:
according to the method and the device, the existing android applications are classified based on different implementation modes, the video switching modes of all the android applications are analyzed, the states of the android applications playing the current video are monitored in different modes aiming at different types of android applications, the sliding operation of a user is simulated by adopting a touch simulation mode when the current video playing is finished, the automatic switching of the video files played by the android applications is realized, the problem that the existing android applications cannot automatically switch the video playing is solved, the convenience of operation is effectively improved, and the user experience is improved.
Drawings
Fig. 1 is a flowchart of a method for automatically switching to play a video by an android application according to the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a method for automatically switching playing videos of an android application, which has the core idea that: the method comprises the steps of classifying and analyzing android applications to be monitored, determining the types and video switching modes of the android applications, acquiring the playing state of the current video file of the android applications by monitoring whether the last frame of the video file is played or not or monitoring the playing time of the video file and the like according to different types, and simulating user sliding operation to realize automatic switching of the video file by adopting a touch sliding simulation mode after the current video is played.
The invention provides a method for automatically switching playing videos of an android application, wherein the flow is shown in figure 1, and the method specifically comprises the following steps:
step 1, determining android applications to be monitored, analyzing and determining video switching modes adopted by all the android applications to be monitored, and establishing an android application directory containing the names of the android applications to be monitored, the types of the android applications and the video switching modes. In the invention, the android application types comprise an FFmpeg-based android application class, a MediaCodec-interface-based android application class and a third-party decoder-based android application class.
The FFmpeg-based android application class is an android application which adopts FFmpeg to realize a video processing function, and the FFmpeg is a multimedia video processing tool and comprises the functions of video acquisition, video format conversion, video capture, video watermarking and the like; android application class based on a MediaCodec interface refers to android application for realizing a video processing function by adopting the MediaCodec interface, wherein the MediaCodec interface is provided by an android system and used for accessing a low-layer multimedia coder/decoder interface, is a part of a low-layer multimedia architecture of the android system, and can realize coding and decoding of common audio and video formats such as H.264, H.265, AAC, 3gp and the like; the android application class based on the third-party decoder is the android application which adopts the third-party decoder to realize the video processing function.
The android application to be monitored is determined according to the user needs, specifically, a relatively common android application can be selected in the existing android market as the android application to be monitored, or the android application with the short video playing function, which is installed in an android system used by the user, can also be detected and used as the android application to be monitored.
In general, the video switching modes adopted by android applications include up-down sliding switching and left-right sliding switching. For the determined android applications to be monitored, the video switching mode of each android application to be monitored can be determined through the actual operation process, and the video switching mode of each android application to be monitored can also be determined in an automatic use testing mode.
In the android system, usually, a plurality of adjacent views of the android application have the same parent view, and for the android application with a short video playing function, the views of adjacent playing video windows usually have the same parent view, only the view of one playing video window is displayed in use, the view of the playing video window adjacent to the view of the playing video window is not displayed any more, and all the views of the playing video windows have the same or similar structure, so that the video switching manner of the android application can be judged by judging the position relationship between all the similar views, which have the same or similar structure as the view of the currently displayed playing video window, in the parent view of the currently displayed view of the playing video window and the current view, for example, if the similar views are located in the left-right direction of the current view, the video switching manner of the android application is left-right sliding switching, if the similar view is located in the up-down direction of the current view, the video switching mode of the android application is up-down sliding switching, and therefore the automatic use testing mode provided by the invention comprises the following steps:
step 1.1, starting an android application to be monitored, and acquiring a view of a currently played video window;
step 1.2, acquiring a parent view of a currently played video window, and acquiring other similar views with the same or similar structure as the view of the currently played video window in the parent view;
1.3, if the similar view and the view of the current playing video window are positioned in the left-right direction, the video switching mode of the android application is left-right sliding switching; and if the similar view and the view of the current playing video window are positioned in the up-down direction, the video switching mode of the android application is up-down sliding switching.
Step 2, acquiring the name of the currently running android application, searching the android application type corresponding to the currently running android application in the android application directory determined in the step 1 according to the name, and executing the step 3 when the android application type is an FFmpeg-based android application class; when the android application type is an android application class based on a MediaCodec interface, executing the step 4; and when the android application type is the android application class based on the third-party decoder, executing the step 5.
Step 3, obtaining the frame rate of a current video file to be played by the currently running android application, if the time interval of two decoding of the FFmpeg (namely, the key frame interval time) is greater than or equal to the reciprocal of the frame rate, monitoring the return value of the video decoding function of the FFmpeg when the video is decoded to the last frame, and executing step 7 when the current state represented by the return value is that the current video frame is decoded; if the time interval between two decoding of the FFmpeg is less than the reciprocal of the frame rate, monitoring the return value of the video decoding function of the FFmpeg when the video is decoded to the last frame, and executing the step 7 after waiting for a set time period when the return value indicates that the current state is that the current video frame is decoded completely.
In general, for android applications of the FFmpeg-based android application class, when playing video, an avcodec _ decode _ video function of FFmpeg is called to decode a video frame, and a return value of the function can identify whether the decoding process of the current video frame is finished. In the invention, whether the video is played completely is judged in an auxiliary way by monitoring the return value of the avcodec _ decode _ video function when the last frame of the video is decoded, namely, when the return value indicates that the last frame is decoded completely and the time interval is greater than or equal to the reciprocal of the frame rate, the video is played completely, and when the return value indicates that the last frame is decoded completely and the time interval is less than the reciprocal of the frame rate, the video is decoded completely and is not played completely, so that the set time period needs to be waited.
In addition, if the time interval between two decoding of FFmpeg is less than the reciprocal of the frame rate, it indicates that there is a pre-decoding operation for FFmpeg, which is generally used in the decoding process of streaming media, and at this time, it is necessary to wait for a set time period before performing subsequent operations, and the set time period is usually the reciprocal of the frame rate or 1/30 seconds.
Step 4, obtaining the frame rate of the current video file to be played by the currently running android application, if the time interval of two decoding set by the MediaCodec is greater than or equal to the reciprocal of the frame rate, monitoring the return value of the query decoding output function of the MediaCodec when the video is decoded to the last frame, and executing step 7 when the return value indicates that the current state is that the current video frame is decoded; otherwise, monitoring the return value of the inquiry decoding output function of the MediaCodec when the video is decoded to the last frame, and executing the step 7 after waiting for a set time period when the return value indicates that the current state is that the current video frame is decoded completely.
In general, for android applications based on MediaCodec interfaces, after a frame of video data is transmitted into a decoder through mcodec. queueinputbuffer when a video is played, the decoding output is queried through mcodec. queueoutputbuffer, and a return value of dequeuoutputbuffer can identify whether the decoding process of a current video frame is finished, if the return value is a normal value, the decoding is finished, otherwise, the decoding process is abnormal or not finished.
In addition, if the time interval between two decodings set by MediaCode is smaller than the reciprocal of the frame rate, it indicates that there is a pre-decoding operation of MediaCode, which is generally used in the decoding process of streaming media, and at this time, it is necessary to wait for the set time period and then perform the subsequent operation, and the set time period is usually the reciprocal of the frame rate or 1/30 seconds.
Step 5, monitoring the value of the progress attribute of a progress bar (progress Bar) control provided by the current android system, and executing step 6 if the value of the progress attribute is not obtained; and if the value of the progress attribute is changed, executing the step 7 when the value reaches 100.
In the android system, a progress value currently displayed by a progress bar (progress bar) is specified by setting a progress attribute value of a progress bar control.
And 6, acquiring the duration of the current video file to be played by the currently running android application, starting timing when the currently running android application starts to play the current video file, and executing the step 7 when the timing time is equal to the duration of the current video file.
The method for acquiring the duration of the current video file to be played by the currently running android application comprises the steps of analyzing the video packaging format and the encoding format of the video file by adopting an FFmpeg or other video decoding engine to acquire the video duration, and acquiring the duration of a network video stream by adopting the FFmpeg or other video decoding engine based on a streaming media protocol when a handshake connection is established for the video stream. In addition, as for the mode of starting timing when the currently running android application starts playing the current video file, the timing can be started by judging the first frame for starting playing the video file, under normal circumstances, a SurfaceView is created when the android application plays the video file, and the first refresh of the SurfaceView entering the VISIBLE state from the INVISIBLE state is the first frame for starting playing the video file, so that the starting time of playing the video file can be determined by detecting the state change of the SurfaceView.
And 7, searching a video switching mode adopted by the android application in the android application directory determined in the step 1 according to the name of the currently running android application, simulating the video switching mode, and switching the video played by the currently running android application into an adjacent video file.
Specifically, the method can simulate the video switching mode adopted by the android application in the following simulated sliding mode. The implementation process of the simulated sliding is to continuously send a group of touch event messages (MotionEvent) to the android environment to simulate the touch sliding, namely to send an ACTION _ DOWN event message at a set starting position (x, y); in the process of simulating the up-down or left-right sliding of the touch point to the end position (x ', y'), the ACTION _ MOVE event message is sent after waiting a set time t to calculate the current position (x ', y') of the touch point, wherein the set time may be 1ms or shorter, for example, when the sliding mode is left-right sliding, the current position is (x '= x ± t, y), and when the sliding mode is up-down sliding, the current position is (x, y' = y ± t); the ACTION UP event message is transmitted after the simulated touch point reaches the end position (x ', y'). The parameters of the touch event message include touch point coordinates and an event type (ACTION _ DOWN, ACTION _ MOTION, ACTION _ UP).
Further, in order to improve the reliability of the transmitted touch event message, the present invention determines the touch point start position (x, y) and end position (x ', y') involved in the touch event message in the following manner:
step 7.1, detecting whether the currently displayed interface has the SurfaceView, if so, taking the center point of the SurfaceView as the starting point position (x, y) of the touch point, and taking the end point position (x ', y') as a set proportion of the offset screen height or width by taking the center point as the center, for example, when the sliding mode is left-right sliding, the end point position is (x '= x +/-w/4, y), and when the sliding mode is up-down sliding, the end point position is (x, y' = y +/-h/4); if no SurfaceView exists, then step 7.2 is performed.
And 7.2, selecting the central point of the View with the largest size in the View tree of the current window as the starting point position (x, y) of the touch point. Further, to avoid the set touch point start position being located at the position of the progress bar, the center point of the rectangle 5/6 sized as the current window located at the upper portion of the current window may be selected as the touch point start position.
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 (10)
1. A method for automatically switching playing videos of an android application is characterized by comprising the following steps:
step 1, determining android applications to be monitored and video switching modes adopted by the android applications to be monitored, and establishing an android application directory containing the android application names, the android application types and the video switching modes of the android applications to be monitored; the android application types comprise an FFmpeg-based android application class, a MediaCodec-interface-based android application class and a third-party decoder-based android application class;
step 2, determining the android application type of the current android application according to the android application name of the current android application and the android application directory, executing step 3 if the current android application is an FFmpeg-based android application class, executing step 4 if the current android application is an android application class based on a MediaCodec interface, and executing step 5 if the current android application is an android application class based on a third-party decoder;
step 3, obtaining the frame rate of a current video file to be played by the current android application, if the interval time of the key frames is greater than or equal to the reciprocal of the frame rate, monitoring the return value of a video decoding function of the FFmpeg when the video is decoded to the last frame, and executing step 7 when the return value indicates that the current video frame is decoded; if the interval time of the key frames is less than the reciprocal of the frame rate, executing step 7 after waiting for a set time period when the return value indicates that the current video frame is decoded;
step 4, obtaining the frame rate of a current video file to be played by the current android application, if the interval time of key frames is greater than or equal to the reciprocal of the frame rate, monitoring the return value of the query decoding output function of the MediaCodec when the video is decoded to the last frame, and executing step 7 when the return value indicates that the current video frame is decoded; if the interval time of the key frames is less than the reciprocal of the frame rate, executing step 7 after waiting for a set time period when the return value indicates that the current video frame is decoded;
step 5, monitoring a progress attribute value of a progress bar control of the current android system, and executing step 6 if the progress attribute value is not obtained; if the progress attribute value is changed, executing the step 7 when the value reaches 100;
step 6, acquiring the duration of a current video file to be played by the current android application, starting timing when the current video file is played by the current android application, and executing step 7 when the timing time is equal to the duration;
and 7, determining a video switching mode of the current android application according to the android application name of the current android application and the android application directory, and simulating the video switching mode to switch the video played by the currently running android application into an adjacent video file.
2. The method according to claim 1, wherein in the step 1 of determining the android application to be monitored and the video switching manner adopted by the android application to be monitored, the step of determining the video switching manner of the android application to be monitored comprises:
step 1.1, starting an android application to be monitored, and acquiring a view of a currently played video window;
step 1.2, acquiring a parent view of a currently played video window and other similar views with the same or similar structures as the view of the currently played video window in the parent view;
1.3, if the similar view and the view of the current playing video window are positioned in the left-right direction, the video switching mode of the android application to be monitored is left-right sliding switching; and if the similar view and the view of the current playing video window are positioned in the vertical direction, the video switching mode of the android application to be monitored is vertical sliding switching.
3. The method of claim 1, wherein the set time period is the reciprocal of the frame rate or 1/30 seconds.
4. The method according to claim 1, wherein the step 6 of obtaining the duration of the current video file to be played by the current android application is to obtain the video duration by analyzing a video encapsulation format and a coding format of the video file by a video decoding engine.
5. The method according to claim 1, wherein the step 6 of obtaining the duration of the current video file to be played by the current android application is to obtain the duration of the network video stream when the video stream establishes a handshake connection based on a streaming media protocol by using a video decoding engine.
6. The method according to claim 1, wherein in the step 6, when starting timing when the current android application starts playing the current video file, it is determined that the mode of the current android application starting playing the current video file is as follows: and determining the starting time of playing the video file by detecting the state change of the SurfaceView.
7. The method according to claim 1, wherein the process of simulating the video switching mode in step 7 is: and continuously sending a group of touch event messages to the android environment to simulate touch sliding, wherein the touch event messages comprise an ACTION _ DOWN event message sent by a simulation touch point at a set starting position, an ACTION _ MOVE event message sent by the simulation touch point at a middle point position in the process of moving to an end position, and an ACTION _ UP event message sent by the simulation touch point after the simulation touch point reaches the end position.
8. The method of claim 7, wherein the coordinates (x ', y') of the midpoint location in the touch event message are determined by: if the current video switching mode of the android application is left-right sliding, (x ', y') is (x '= x ± t, y), and if the current video switching mode of the android application is up-DOWN sliding, (x', y ') is (x, y' = y ± t), where (x, y) is the starting point position coordinate, and t is the time waiting after sending the ACTION _ DOWN event message.
9. The method of claim 7, wherein the coordinates of the start and end positions are determined by:
step 9.1, detecting whether the currently displayed interface has the SurfaceView, if so, taking the central point of the SurfaceView as a starting position (x, y), and taking the central point as a set proportion of the offset screen height h or width w as an end position (x ', y'); the terminal position is (x '' = x +/-w/4, y) when the video switching mode is left-right sliding, and the terminal position is (x, y '' = y +/-h/4) when the video switching mode is up-down sliding; if no SurfaceView exists, executing step 9.2;
and 9.2, selecting the View with the largest size in the View tree of the currently displayed interface, and taking the center point as the starting point position (x, y) of the touch point.
10. The method of claim 9, wherein the starting point in step 9.2 is the center point of the 5/6 sized rectangle of the View with the largest size in the View tree of the currently displayed interface.
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