android adapterview

Adapterview IntroductionAdapterview component is a kind of very important component, Adapterview itself is an abstract base class, inherits from ViewGroup, the usage is very similar, only the display form is different, therefore agrees to explain.Characteristics of AdapterviewDerivation relationships of Adapterview and its subclassesAdapterview derives three subc

this case, a TextView control is placed. Because the child view corresponds to the same layout, the resource ID of the control inside each child view is the same because the resource ID is specified by the same layout.The right part of the graph is a data source, such as a content provider or SQLite database, and the query returns a cursor. Adapter is the key to associating the left-hand listview with the right-side data source, which reads a set of data from the data source, correlates it to a

Preface This chapter covers android. widget. AdapterView. AdapterContextMenuInfo. The version is Android 2.3 r1 and translated from "cnmahj". Welcome to his blog: http://android.toolib.net/blog/. Thank you again "cnmahj "! Welcome to join in Android API Chinese translation, contact me over140@gmail.com. Statement You

parameter represents the view that was just hidden when the scroll bar was scrolled. This view is hidden, and we can use this view to present the view that we just showed, instead of recreating a view. This greatly reduces the consumption of memory and time.4,BaseexpandablelistadapterIt is an abstract method, and its subclasses are more commonly used including: Simpleexpandablelistadapter, SimplecursortreeadapterIf you use Baseexpandablelistadapter in your code, the more important ways to imple

getting hundreds of rows, but the system actually gets more, so that when the fingers move quickly, you can see the new line display more quickly. Note: listview is used as an example here, but other types of adapterview can also be used in general mode.System preset Layout In this example, chreceivlayout ID starts with Android. R., which indicates that it is a system preset, rather than the resources in o

feature, the subclass that overrides the method must first call the method of the parent class.ParametersPosition the index (zero-based) of the selected data entry.Vi. Methods of protectionProtected Boolean cananimate ()Indicates whether the view group can provide an animated display for its child views after the first layout.return valueReturns true if the child view can use the animation effect, otherwise false.protected void dispatchrestoreinstancestate (sparsearrayOverrides to prevent the a

Preface This chapter content is android. widget. AdapterView. OnItemClickListener, version for Android 2.3 r1, translated from "wheat", welcome to communicate with him: 0mellisa0@gmail.com, thanks again "wheat "! Welcome to join in Android API Chinese translation, contact me over140@gmail.com. Statement You are welcom

Preface This chapter is about android. widget. AdapterView. OnItemSelectedListener. The version is Android 2.3 r1 and translated from "cnmahj". You are welcome to visit his blog: http://android.toolib.net/blog/. Thank you again "cnmahj "! Welcome to join in Android API Chinese translation, contact me over140@gmail.com.

Android AdapterView clears the cache view method, androidadapterview AdapterView. SetAdapter (null ); AdapterView. SetAdapter (mAdapter ); You can. Android AdapterView In fact, you will find that the parameter of this method i

Preface This chapter covers android. widget. AdapterView. OnItemLongClickListener. The version is Android 2.3 r1 and translated from "cnmahj". You are welcome to visit his blog: http://android.toolib.net/blog/. Thank you again "cnmahj "! Welcome to join in Android API Chinese translation, contact me over140@gmail.com.

Listview is a list component. It generally uses the system-provided listview by inheriting listactivity. All adapterview components must have a corresponding adapter as the adapter to display the layout of elements in the list. See Mind Map Arrayadapter: array or set adapter. Example:Private final string [] MOUs = {"Guo jia ","Zookeeper ","Zookeeper ","Cheng Jing ","Drama talents ","Xu Shu"};Arrayadapter You can also use the

An understanding of the four parameters (ARG) of the Onitemclicklistener listener for the adapter interface in Android development:Code: public void Onitemclick (adapterviewIf there is a ListView, the ListView contains the A,b,c,d 4 item.If you order b this item. As follows:(1) public void Onitemclick (adapterview/* The parent is equivalent to a pointer to the ListView adapter, which can be used to get ever

Adapterviewanimator: displays an animation when switching between views. Android: animatefirstview Specifies whether to apply an animation to the current view when viewanimation is first displayed.Android: inanimation Specifies the animation used to display the view. Android: loopviews Defines whether to cyclically execute an animation to the first view after it is executed at the end of the list.Android: o

=" http://www.bkjia.com/uploads/allimg/131228/062H0K26-0.jpg "title =" Capture. JPG "/> So far, we have understood the principle of this framework. Simply put, we can use controller C) to map dataset M to view V. Let's talk about the relationship between Adapter, AdapterView, and DataSource using this idea: Adapter -- C Controller) AdapterView -- V view) DataSource -- M dataset) Now that we understand thi

General statement Android "List" Implementation is actually a typical MVC pattern, in fact, Adapterview is equivalent to view, responsible for drawing and view of the event response, adapter equivalent to controller, is responsible for controlling the display of data and presentation methods, In addition, the entity class in the project represents model. Adapter Adapter is actually an interface, not a sp

AdapterView of UI components and its sub-class (3) details of the Spinner Control The Spinner allows you to quickly select a value from a dataset. By default, the Spinner displays the selected value,Click the Spinner to bring up a dropdown menu or a dialog box containing all optional values. From this menu, you can select a new value for the Spinner. I will discuss in this article 1. Basic usage of Spinner 2. xml attributes of the Spinner 3. Set the a

How to avoid the ListView and other Adapterview on the dynamic add deletion of the trap, below for everyone to share, the specific content as follows First, define the following array resource as the loading content for the list: Then simply write down the layout file, because I need to set the Layout_weight in the ListView to 1, regardless of how long the list is, and always display the edit box and button at the bottom.

Adapter data changes the implementation principle and case of the existing View, adapterview First, let's talk about the inheritance relationship of the specific class of the Adapter, as shown in Adapte serves as a bridge between AdapterView and View. The Adapter loads View (such as the data to be displayed in ListView and girdView ). The data to be displayed in the related View is completely decoupled fr

Layout file,ListView android:id= "@+id/mainratepicview" android:layout_width= "Match_parent" android:layout_height= "Wrap_content" android:layout_below= "@id/wordview_mainrate" android:layout_margintop= "@dimen/appendrate_item_mainrate_margin_top" android: Listselector= "@color/transparent" > Is isn't supported in Adapterview

04-24 15:58:38.768 24891-24891/? E/androidruntime:fatal Exception:main Process:com.example.kodulf.listviewyouhuademo, pid:24891 Java.lang.UnsupportedOperationException:addView (View, layoutparams) is not supported in Adapterview The reason for the error is: The following inflate should not be the parent, should be null Convertview = Layoutinflater.from (context). Inflate (r.layout.item,parent); Workaround: Convertview = Layoutinflater.