Design Mode of android Application Development: appearance Mode

Next, let's learn the appearance mode.
[Html]
<P> appearance mode: provides a unified interface to access a group of interfaces in the subsystem. </P> <p> Create a Car class </p> <pre class = "java" name = "code"> package com. jindegege. car;
 
Public class Car {
 
Public String start (){
Return "the car has started ";
}
 
Public String check_stop (){
Return "Check the brakes ";
}
 
Public String check_box (){
Return "Check tank ";
}
 
Public String check_console (){
Return "Check dashboard ";
}
 
}
 
2. Create a new appearance class (this class provides a unified interface for accessing the Car class interface method)
[Java]
Package com. jindegege. car. facade;
 
Import java. util. ArrayList;
Import java. util. HashMap;
Import java. util. List;
Import java. util. Map;
 
Import com. jindegege. car. Car;
 
 
 
 
Public class Facade {
 
Public Map <String, String> car_do (Car car) {// unified interface method
Map <String, String> data = new HashMap <String, String> ();
/**
* Used to access a group of interface methods in the subsystem
*
*/
String data1 = car. check_box ();
String data2 = car. check_console ();
String data3 = car. check_stop ();
String data4 = car. start ();
Data. put ("data1", data1 );
Data. put ("data2", data2 );
Data. put ("data3", data3 );
Data. put ("data4", data4 );
Return data;
}
}
3. Create an android client and provide xml and activity:
[Html]
<? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: orientation = "vertical">
 
<TextView
Android: id = "@ + id/textview01"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: text = "@ string/hello"/>
<TextView
Android: id = "@ + id/textview02"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
/>
<TextView
Android: id = "@ + id/textview03"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
/>
<TextView
Android: id = "@ + id/textview04"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
/>
 
</LinearLayout>

Main activity class:
[Java]
Package com. jindegege. facade;
 
 
Import java. util. Map;
 
Import com. jindegege. car. Car;
Import com. jindegege. car. facade. Facade;
 
 
Import android. app. Activity;
Import android. OS. Bundle;
Import android. widget. TextView;
 
Public class FacadeActivity extends Activity {
Private TextView textview01;
Private TextView textview02;
Private TextView textview03;
Private TextView textview04;
Private Facade car_impl;
Private Map <String, String> data;
@ Override
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
Textview01 = (TextView) findViewById (R. id. textview01 );
Textview02 = (TextView) findViewById (R. id. textview02 );
Textview03 = (TextView) findViewById (R. id. textview03 );
Textview04 = (TextView) findViewById (R. id. textview04 );
Car_impl = new Facade ();
Data = car_impl.car_do (new Car ());
If (textview01! = Null & data. get ("data1 ")! = Null ){
Textview01.setText (data. get ("data1"). toString ());
}
If (textview02! = Null & data. get ("data2 ")! = Null ){
Textview02.setText (data. get ("data2"). toString ());
}
If (textview03! = Null & data. get ("data3 ")! = Null ){
Textview03.setText (data. get ("data3"). toString ());
}
If (textview04! = Null & data. get ("data4 ")! = Null ){
Textview04.setText (data. get ("data4"). toString ());
}

}
}

Let's take a look at the simple implementation effect:

Isn't it easy? encapsulate the sub-operation with a appearance interface, and then call this interface to call those very complex micro-operations.

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