CN105549973A - Data updating method and system for view list in list control - Google Patents
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Abstract
The invention provides a data updating method and system for a view list in a list control. The method comprises an interface initialization stage and an interface updating stage. During the interface initialization stage, the filling of a data source is carried out, namely, a first flag bit is added into a data structure corresponding to each view list item in the data source, and the filled data source is bound with a data adapter; and the list control obtains the data source through the data adapter, the view list of the corresponding list control is filled with the view list items in the data source, and a first view is drawn according to the view list of the list control. During the interface updating stage, when the data structure is changed, the first flag bit of the data structure is changed to a second flag bit, the view list of the list control obtains a data structure containing the second flag bit, and a corresponding view part of the data structure containing the second flag bit in the first view is drawn to obtain a second view. According to the data updating method and system, only the list item view with the changed data is updated, so that the resource waste is avoided and the updating performance is greatly improved.
Description
Technical field
The present invention relates to a kind of Android operational system, particularly relate to the system and method for the optimization of the Data Update of view list in a kind of Android list control.
Background technology
Along with the fast development of modern communication equipment, in Android application, the frequency of utilization of list control is very high, and the operation upgrading list interface when data variation is also very frequent, the method that currently available technology uses is the notifyDataSetChanged method of data adapter unit in calling system, realize upgrading interface, but the method is when upgrading interface, all list items in visual interface can be repainted, even if the data of some list items bindings do not change, also can be repainted.
Current existing technical scheme, that data in data source are when changing, call the system provider method notifyDataSetChanged of the data adapter unit of associated, trigger interface and redraw operation, now visual on interface list items, all by the getView method of data adapter unit, can obtain the view comprising new data, be plotted on screen, specifically can with reference to Android official exploitation document; But the shortcoming of above-mentioned prior art is, in the getView method of calling data adapter, when redrawing interface, whether data source data all changes, and all the view of binding data again can be drawn, so, can cause the waste of performance greatly.
Existence in view of the above problems, a kind of newly, effectively provide a kind of just by the view of vicissitudinous data rows list item, again bind new data, the invention making program feature obtain effectively promoting the system and method for the optimization of the Data Update of view list in a kind of list control is imperative.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of just by the view of vicissitudinous data rows list item, again new data is bound, and avoid data source data and whether all change, the view of binding data again carries out drawing and the waste of the performance caused by capital, so makes program feature effectively be promoted.
For achieving the above object and other relevant objects, the invention provides the data-updating method of view list in a kind of list control, it at least comprises the steps: interface initial phase, carry out data source filling, wherein, described data source is filled in the data structure of each view list item correspondence in data source adds the first zone bit, the described data source after filling and data adapter unit is bound; Described list control obtains described data source by described data adapter unit, is packed into by the view list item in described data source in the view list of corresponding described list control, draws the first view according to the view list of list control; Described first view of display interface display; Interface is the new stage more, when described data structure changes, first zone bit of described data structure is changed to the second zone bit, so that the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, obtain the second view, so that described second view of display interface display.
Alternatively, the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, a kind of specific implementation process obtaining the second view comprises: searching loop data source, find the data structure comprising the second zone bit, obtain the primary importance of data structure in described data source comprising the second zone bit; The position of first view list at described primary importance and current visible interface is compared, obtains the position needing the view list upgraded; The affiliated data structure comprising the second zone bit is updated in the view list of described needs renewal, obtains described second view.
Alternatively, described data adapter unit, according to the difference of the position of first view list at described primary importance and described current visible interface, obtains the position needing the view list upgraded.
Alternatively, the position of first view list at described current visible interface is obtained by described list control.
Alternatively, the default value of described first zone bit is false; The default value of described second zone bit is true.
The present invention also provides the data update system of view list in a kind of list control, it at least comprises: interface initialization module, carry out data source filling, wherein, described data source is filled in the data structure of each view list item correspondence in data source adds the first zone bit, the described data source after filling and data adapter unit is bound; Described list control obtains described data source by described data adapter unit, is packed into by the view list item in described data source in the view list of corresponding described list control, draws the first view according to the view list of list control; Described first view of display interface display; Interface update module, be connected with described interface initialization module, when described data structure changes, first zone bit of described data structure is changed to the second zone bit, so that the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, obtain the second view, so that described second view of display interface display.
Alternatively, in described list control, the data update system of view list also comprises: described interface update module is after vicissitudinous data being detected, searching loop data source, find the data structure comprising the second zone bit, obtain the primary importance of data structure in described data source comprising the second zone bit, the position of first view list at described primary importance and current visible interface is compared, obtain the position needing the view list upgraded, the affiliated data structure comprising the second zone bit is updated in the view list of described needs renewal, obtain described second view.
Alternatively, described data adapter unit, according to the difference of the position of first view list at described primary importance and described current visible interface, obtains the position needing the view list upgraded.
Alternatively, described list control obtains the position of first view list at described current visible interface.
Alternatively, the default value of described first zone bit is false; The default value of described second zone bit is true.
As mentioned above, the data update system of view list and method in a kind of list control of the present invention, have following beneficial effect:
In list control of the present invention, the data update system of view list and method are compared with prior art, owing to just vicissitudinous for data list items view can be upgraded, and avoid data source data and whether all change, the view of binding data again carries out drawing and the waste of the performance caused by capital, and program feature can be promoted greatly.
Accompanying drawing explanation
Fig. 1 is shown as the step schematic diagram of the interface initial phase of the data-updating method of view list in list control of the present invention.
The step schematic diagram of the interface that Fig. 2 is shown as the data-updating method of view list in list control of the present invention more new stage.
Fig. 3 is shown as the block schematic illustration of the data update system of view list in list control of the present invention.
Element numbers explanation
101 interface initialization modules
102 interface update module
S10-S15 step S10-S15
S31-S33 step S31-S33
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.It should be noted that, when not conflicting, the feature in following examples and embodiment can combine mutually.
It should be noted that, the diagram provided in following examples only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
The embodiment of the present invention provides the data-updating method of view list in a kind of list control, and it at least comprises the steps:
Interface initial phase, carries out data source filling, and wherein, described data source is filled in the data structure of each view list item correspondence in data source adds the first zone bit, the described data source after filling and data adapter unit is bound; Described list control obtains described data source by described data adapter unit, is packed into by the view list item in described data source in the view list of corresponding described list control, draws the first view according to the view list of list control; Described first view of display interface display; Wherein, the default value of described first zone bit is false; The default value of described second zone bit is true.
Interface is the new stage more, when described data structure changes, first zone bit of described data structure is changed to the second zone bit, so that the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, obtain the second view, so that described second view of display interface display.Further, the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, a kind of specific implementation process obtaining the second view comprises: searching loop data source, find the data structure comprising the second zone bit, obtain the primary importance of data structure in described data source comprising the second zone bit; The position of first view list at described primary importance and current visible interface is compared, obtains the position needing the view list upgraded; The affiliated data structure comprising the second zone bit is updated in the view list of described needs renewal, obtains described second view.Wherein, described data adapter unit, according to the difference of the position of first view list at described primary importance and described current visible interface, obtains the position needing the view list upgraded; The position of first view list at described current visible interface is obtained by described list control.
In list control of the present invention, the protection domain of the data-updating method of view list is not limited to the step execution sequence that the present embodiment is enumerated, and the step increase and decrease of the prior art that every principle according to the present invention is done, step are replaced the scheme realized and be all included in protection scope of the present invention.
The present invention also provides the data update system of view list in a kind of list control; in described list control, the data update system of view list can realize the data-updating method of view list in list control of the present invention; but the implement device of the data-updating method of view list includes but not limited to the structure of the data update system of view list in the list control that the present embodiment is enumerated in list control of the present invention; the malformation of the prior art that every principle according to the present invention is done and replacement, be all included in protection scope of the present invention.
In described list control, the data update system of view list, shown in Figure 3, and it at least comprises: interface initialization module 101, interface update module 102.
Described interface initialization module 101, carries out data source filling.Wherein, described data source is filled in the data structure of each view list item correspondence in data source adds the first zone bit, the described data source after filling and data adapter unit is bound; Described list control obtains described data source by described data adapter unit, is packed into by the view list item in described data source in the view list of corresponding described list control, draws the first view according to the view list of list control; Described first view of display interface display.Wherein, the default value of described first zone bit is false; The default value of described second zone bit is true.
Described interface update module 102 is connected with described interface initialization module 101, when described data structure changes, first zone bit of described data structure is changed to the second zone bit, so that the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, obtain the second view, so that described second view of display interface display.Further, described interface update module 102 is after vicissitudinous data being detected, searching loop data source, find the data structure comprising the second zone bit, obtain the primary importance of data structure in described data source comprising the second zone bit, the position of first view list at described primary importance and current visible interface is compared, obtain the position needing the view list upgraded, the affiliated data structure comprising the second zone bit is updated in the view list of described needs renewal, obtains described second view.Wherein, described data adapter unit, according to the difference of the position of first view list at described primary importance and described current visible interface, obtains the position needing the view list upgraded; Described list control obtains the position of first view list at described current visible interface.
Particularly, refer to shown in Fig. 1 and Fig. 3, the present embodiment provides data update system and the method for view list in a kind of list control, the substance of the inventive method is, in the entity class of data comprising needs display, increase a zone bit, represent the need of again obtaining view view and filling new data with true or false, afterwards in the realization of data adapter unit, when getView generates List View View, increase decision logic, if need to repaint, then walk by normal flow, if do not needed, then directly return existing List View.
In list control of the present invention, the preposition requirement of the data-updating method of view list is, in data source, mainly data structure that list uses, increase a zone bit, data type is Boolean, acquiescence false.When there being data variation, in this data structure, zone bit is set to true, and showing needs to upgrade interface; Call the method at the renewal interface of optimization afterwards, by the data structure in all data sources of searching loop, whether judgement symbol position is true, if, then by the position of this data structure in data source, compare with the position of first data structure in current visible interface, obtain the view view needing to upgrade, then new data is set.
Namely, list control ListView obtains the listings view view that will show by binding data adapter, the method obtained is getView (), then data source is in data adapter unit, fill in getView method, up-to-date data are just had in the view that such list control ListView is obtained by getView () method, then upgrade and be exactly, after vicissitudinous data being detected, be true by its mark position, then the renewal tabulating method optimized in calling data adapter: first find zone bit to be the data of true, according to the order of these data in data source, find the position of list items view corresponding in list control ListView, then this view is obtained, refill the data of renewal and show, so far upgraded.
The data-updating method of view list in a kind of list control provided by the present invention, by being now divided into interface initial phase and interface, more the new stage is described as follows:
Shown in figure 1, interface initial phase,
Perform step S31, after entering interface,
Perform step S32, be first the filling carrying out data source, and add zone bit in each data structure, default value is false, is ready for operation afterwards.
Perform step S33, that is, afterwards by its binding data adapter, now interface can obtain the view of list items by the getView method of adapter, shows.
Shown in figure 2, interface is the new stage more,
Perform step S10, when described data source changes,
Perform step S11, the zone bit synchronously arranging the data structure inside of change is true, shows that this needs to upgrade,
Perform step S12 afterwards, call this interface updating method, its idiographic flow is as described below:
Perform step S13, carry out searching loop data source, find zone bit in data structure to be the data of true, take its position position1 in data source according to cycle index;
Perform step S14, the position position2 of first list items at position1 and current visible interface is compared, the method that position2 can be provided by list control obtains, compare both aforementioned and obtain: the position difference of list items and current visible interface first list items that needs upgrade, be delivered to the list items view that data adapter unit getChildAt method obtains needing to upgrade;
Perform step S15, index data corresponding in data source by position1, the available data in view obtained in the previous step is upgraded;
Get back to the first step, continue traversal, if had, then repeat the step of S13-S15,
Otherwise terminate the step of the invention described above method.
The invention provides the data update system 100 of view list in a kind of list control, it at least comprises:
Interface initialization module 101, after entering interface, carries out the filling of data source, in each data structure, adds zone bit, afterwards by its binding data adapter, obtains the view of list items, shows;
Interface update module 102, when described data source changes, the zone bit synchronously arranged in the data structure of change shows that this needs to upgrade, and calls this interface updating method afterwards.
The data update system 100 of view list in described list control, it adds zone bit in the data comprising needs display;
Judge whether to need again to obtain List View, fill new data according to the content of zone bit; Generate List View, in the realization of data adapter unit, increase decision logic; If need to repaint List View, then walk by normal flow, otherwise,
Then directly return existing List View.Described zone bit represents with true or false, and default value is false.
The data update system 100 of view list in described list control, its interface update module is called this interface updating method and is comprised the steps: described searching loop data source, find zone bit in data structure to be the data of true, obtain its position in data source according to cycle index; The position of first List View at above-mentioned position and current visible interface is compared the position difference of List View and current visible interface first List View obtaining needing to upgrade, be delivered to the List View that data adapter unit obtains needing to upgrade; Obtain its location index in data source data corresponding in data source by cycle index, the available data in List View obtained in the previous step is upgraded; Continue traversal, if had, then repeat above-mentioned step, otherwise, terminate above-mentioned step.The data update system of view list in described list control, the method that the position of first List View at current visible interface described in it is provided by list control obtains.List control ListView obtains the listings view view that will show by binding data adapter, the method obtained is getView (), then data source is in data adapter unit, fill in getView method, up-to-date data are just had in the view that such list control ListView is obtained by getView () method, then upgrade and be exactly, after vicissitudinous data being detected, be true by its mark position, then the renewal tabulating method optimized in calling data adapter: first find zone bit to be the data of true, according to the order of these data in data source, find the position of list items view corresponding in list control ListView, then this view is obtained, refill the data of renewal and show, so far upgraded.
The data update system of view list and method in a kind of list control of the present invention, in the entity class of data comprising needs display, increase a zone bit, represent the need of again obtaining view and filling new data, afterwards in the realization of data adapter unit with true or false, when getView generates List View View, increase decision logic, if need to repaint, then walk by normal flow, if do not needed, then directly return existing List View.Increase a zone bit in the data source that the present invention uses in list, mainly data structure, data type is Boolean, acquiescence false.When there being data variation, in this data structure, zone bit is set to true, and showing needs to upgrade interface; Call the method at the renewal interface of optimization afterwards, by the data structure in all data sources of searching loop, whether judgement symbol position is true, if, then by the position of this data structure in data source, compare with the position of first data structure in current visible interface, obtain the view needing to upgrade, then new data is set.Whether owing to just vicissitudinous for data list items view can be upgraded, and avoid data source data and all change, all the view of binding data again can be carried out drawing and the waste of the performance caused, program feature can be promoted greatly.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. the data-updating method of view list in list control, it is characterized in that, it at least comprises the steps:
Interface initial phase, carries out data source filling, and wherein, described data source is filled in the data structure of each view list item correspondence in data source adds the first zone bit, the described data source after filling and data adapter unit is bound; Described list control obtains described data source by described data adapter unit, is packed into by the view list item in described data source in the view list of corresponding described list control, draws the first view according to the view list of list control; Described first view of display interface display;
Interface is the new stage more, when described data structure changes, first zone bit of described data structure is changed to the second zone bit, so that the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, obtain the second view, so that described second view of display interface display.
2. the data-updating method of view list in list control according to claim 1, it is characterized in that: the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, a kind of specific implementation process obtaining the second view comprises:
Searching loop data source, finds the data structure comprising the second zone bit, obtains the primary importance of data structure in described data source comprising the second zone bit;
The position of first view list at described primary importance and current visible interface is compared, obtains the position needing the view list upgraded;
The affiliated data structure comprising the second zone bit is updated in the view list of described needs renewal, obtains described second view.
3. the data-updating method of view list in list control according to claim 2, it is characterized in that: described data adapter unit, according to the difference of the position of first view list at described primary importance and described current visible interface, obtains the position needing the view list upgraded.
4. the data-updating method of view list in list control according to claim 2, is characterized in that: the position of first view list at described current visible interface is obtained by described list control.
5. the data-updating method of view list in the list control according to arbitrary one of Claims 1-4, is characterized in that: the default value of described first zone bit is false; The default value of described second zone bit is true.
6. the data update system of view list in list control, it is characterized in that, it at least comprises:
Interface initialization module, carries out data source filling, and wherein, described data source is filled in the data structure of each view list item correspondence in data source adds the first zone bit, the described data source after filling and data adapter unit is bound; Described list control obtains described data source by described data adapter unit, is packed into by the view list item in described data source in the view list of corresponding described list control, draws the first view according to the view list of list control; Described first view of display interface display;
Interface update module, be connected with described interface initialization module, when described data structure changes, first zone bit of described data structure is changed to the second zone bit, so that the view list of described list control obtains the data structure comprising the second zone bit, draw the View component of the data structure correspondence in described first view comprising described second zone bit, obtain the second view, so that described second view of display interface display.
7. the data update system of view list in list control according to claim 6, it is characterized in that, in described list control, the data update system of view list also comprises: described interface update module is after vicissitudinous data being detected, searching loop data source, find the data structure comprising the second zone bit, obtain the primary importance of data structure in described data source comprising the second zone bit, the position of first view list at described primary importance and current visible interface is compared, obtain the position needing the view list upgraded, the affiliated data structure comprising the second zone bit is updated in the view list of described needs renewal, obtain described second view.
8. the data update system of view list in list control according to claim 7, it is characterized in that: described data adapter unit, according to the difference of the position of first view list at described primary importance and described current visible interface, obtains the position needing the view list upgraded.
9. the data update system of view list in list control according to claim 7, is characterized in that: described list control obtains the position of first view list at described current visible interface.
10. the data update system of view list in the list control according to arbitrary one of claim 6 to 9, is characterized in that: the default value of described first zone bit is false; The default value of described second zone bit is true.
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