Serverfirst these two classes have been hit into the jar bag, can not be modified ah ... "Your leader is a little awkward.What This is not the pit father, do I have to change the interface? "You are already in tears.""This is not necessary, in this case you can use the adapter mode, this mode is to solve the problem of incompatibility between the interface appears." ”In fact, the use of the adapter mode is
The following conditions need to be met:
1, compared to the new adapter connection computer interface, must be the same interface with the Huara adapter.
2, look at the adapter's label in the "Output/output" Item after the number, the legend shows 20v-4.5a,20v for this adapter output voltage, the new adapter must be
?Adapter mode: the interface of a class is transformed into another interface that the customer expects, and the adapter lets the originally incompatible classes work together seamlessly.appearance mode: provides a unified interface for accessing a group of interfaces in a subsystem. The appearance defines a high-level interface that makes the subsystem easier to use.?Object adapter:Class
Why do I need adapter? Short answer: Simplifying"Event Source" can register (addxxxlistener) Listener object and Send event objectWindowListener listener = ...; Frame.addwindowlistener (listener);Specific event corresponding to a specific listener interface (Listener interface); Public Interface windowlistener{ void windowopened (windowevent e); void windowclosing (WindowEvent e);}In order to handle a particular event, the listener implements t
On the basis of custom ViewGroup (5): http://www.jb51.net/article/100639.htm, add the use of adapter to fit the data, which is more convenient, just use the adapter adapter data and cannot be updated.
Package com.example.libingyuan.horizontallistview.ScrollViewGroup;
Import Android.content.Context;
Import Android.util.AttributeSet;
Import Android.util.Displ
(New Operationadd, A, b);
Case "Minus": Return Context.getresult (New, Operationminus, A, b);
......
}
}
private static int GetResult (Operation ins, int a, int b) {return
ins.calculateresult (a,b);
}
In this way, our client code can be changed to:
public class customer{public
static void Main (Strings args[]) {The context
ins = new context ();
int result Ins.getresult ("add", 1,2);
}
Compare the client code for the previous s
Basic of ListView-data adapter resolution and listview AdapterData adapter:
Purpose: Fill in complex data (array, linked list, database, set, etc.) on the specified view interface.ArrayAdapter (array adapter): used to bind a single data formatArray Source: can be a set or ArrayArrayAdapter (context, the layout file and data source corresponding to each list item
Explain:Transforms the interface of one class into another interface that the customer wants. Those classes that would otherwise not work together because of incompatible interfaces can work together.Solve the problem:What is needed is, but cannot be used, and cannot be modified in a short time. That is, make a function suitable for different environments.In the development, the system data, behavior are matched, but the interface does not match, you can consider the adapter.It is desirable to r
Here is a "finger-round" example to illustrate the principle of adapter mode and simple application, this example from Java and schema.
1. Class Diagram
2. Java Implementation CodePackage cn.edu.ynu.sei.adapter;
/**
* Sphere Interface *
* @author 88250
* @version 1.0.0, 2007-8-28
*/
public interface BALLF
{
/**
* Calculated surface Area
* @return
*/
Public double CalculateArea ();
/**
* Calculate Volume
* @return
*/
Public double calculat
One system wants to use another system's data source, but the data source format does not meet its own requirements, which can be used in adapter modeOne example: The data provided by the personnel system returns the map type, but the financial system needs a List type of dataData sources provided by the personnel system:1 ImportJava.util.HashMap;2 ImportJava.util.Map;3 4 Public classpeople {5 PublicMapGetorgname () {6MapNewHashmap();7Map.put (1
did not expect her wife to get angry. She told her that he was an unlearned hacker and never let him in again. And Shen's transfer plan ended in failure.
Ji Xiaolan thought, I can't say that I want to make an appointment with a girl like Shen. when I leave the house, I want to say that my wife loves listening. What I do is what I love and do what I do, in this way, both of them can be done. The following code is used:
Reading: The old lady thought she was going to study. She actually went o
The holes that use Holder in the Adapter, and the Adapter uses Holder
When using the GridView and ListView, Zookeeper usually uses Holder to cache each item in the Adapter to improve efficiency. However, if the Holder is not used properly, this caching mechanism will lead to many unexpected problems, I would like to sum up my experience to avoid further attacks i
What is the role of adapter? In fact, it is a bridge between the view interface and the data. We can be seen as an understanding of interface data binding, and the data it manipulates are generally more complex data, such as arrays, lists, databases, collections, etc.The commonly used adapters are:(1) arrayadapter; array as the data source, filled with arrayadapter(2) Simpleadapter; list as a data source, populated with Simpleadapter(3) Simplecursorad
Adapter Mode: Converts the interface of a class into another interface that the customer expects. Adapters allow classes that are incompatible with the original interface to work together.Direct. The following is the class diagram for the object adapter. Because Java does not support multiple inheritance. So this is how the Java adapter is implemented.Combining H
Adapter (Adapter) Details: http://blog.csdn.net/jjwwmlp456/article/details/39893723The Observer (Observer) Details: http://blog.csdn.net/jjwwmlp456/article/details/39967021Adapterview systemadapter is used in AdapterviewAdapter systemBaseadapter realizes the Spinneradapter, ListAdapterIn this form, the adapter mode is used, and here is the interface adapterViewer
The general use of pageadapter need to implement GetCount, Isviewfromobject, Instantiateitem, Destroyitem and other default functions, in fact, you can extract the common code into the parent class./*** Created by Xiaoxuan948 on 2015/10/27.* Desc:* Hint: Set data to adapter first, then bind adapter Setadapter Call Instantiateitem method */Public classabsunitybasepageadapterT>extendsPageradapterImplementsIno
Adapter class Adapter, NULL implementation of an abstract method in an interfaceImportJava.awt.Button;ImportJava.awt.Frame;ImportJava.awt.event.MouseAdapter;ImportJava.awt.event.MouseEvent;ImportJava.awt.event.MouseListener;ImportJava.awt.event.WindowAdapter;ImportJava.awt.event.WindowEvent;ImportJava.awt.event.WindowListener;/ * * Adapter class
Situation Description:Today in the writing of data display, using the ListView, in its adapter, found that the number of times the GetView method execution is the data item n times (my side of the display is 4 times times, this times the value does not know will change), this is obviously unscientific!Check the data and find the layout problem of the ListView. I set the android:layout_height= "wrap_content" Height to wrap_content. While the Wrap_conte
By using this method, you can connect a mobile device (iphone, ipad, or mobile phone) to the Internet through a wireless network card of a laptop.Microserof virtual wifi miniport adapter is a new feature of Windows 7, which is called virtual wifi.The virtual Wifi function in Windows 7 can Virtualize a network card based on a wireless network card, so that the AP function of the wireless router can be realized, and wireless devices can share the Intern
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