Android instance-Mobile security Defender (vii)-Custom combo controls

First, the goal.

Combines multiple system controls (TextView, buttons, checkboxes, and so on) into a single custom control and is used like a system control. The 1th Automatic Update control is based on a relative layout, and the 2nd Automatic Update control is a custom composite control that can be reused like a system control such as a general textview.

Custom controls

Second, the code implementation.

1. Create a new XML file (named Model_setting_item.xml) under the Layout folder to save the layout of the custom control.

2. Organize individual system controls in a new XML file (Model_setting_item.xml) according to design. Here you can copy the code from the relative layout in the layout file (Activity_setting.xml) of the sixth lecture to the new XML file, preserving the relative layout header in the new XML file when the primary copy is in place.

New XML file (model_setting_item.xml) code:

1<?xml version= "1.0" encoding= "Utf-8"?>2<relativelayout xmlns:android= "Http://schemas.android.com/apk/res/android"3Android:layout_width= "Wrap_content"4android:layout_height= "Wrap_content"5android:layout_marginleft= "10dip"6android:layout_marginright= "10dip" >7 8<TextView9Android:id= "@+id/setting_update_title"TenAndroid:layout_width= "Wrap_content" Oneandroid:layout_height= "Wrap_content" Aandroid:layout_margintop= "10dip" -android:text= "Automatic Updates" -Android:textcolor= "#000000" theAndroid:textsize= "22dip"/> -  -<TextView -Android:id= "@+id/setting_update_content" +Android:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" +android:layout_below= "@id/setting_update_title" AAndroid:text= "Allow Automatic Updates when software is networked" atAndroid:textcolor= "#88000000" -Android:textsize= "18dip"/> -  -<CheckBox -Android:id= "@+id/setting_update_checkbox" -Android:layout_width= "Wrap_content" inandroid:layout_height= "Wrap_content" -Android:layout_alignparentright= "true" toAndroid:layout_centervertical= "true"/> +  -<View theAndroid:layout_width= "Match_parent" *android:layout_height= "0.1dip" $android:layout_below= "@id/setting_update_content"Panax Notoginsengandroid:layout_margintop= "2dip" -android:background= "#70000000"/> the  +</RelativeLayout>

View Code

3. The way to create a marquee control (see fourth) creates a new class that inherits the relative layout (named Settingitemview) under the Custom tool class package (Com.example.mobilesafe.ui). In the new Class (Settingitemview) code:

①. Define three construction methods (same as "marquee" section): Menu bar Source--generate Constructors from superclass, click OK in the popup dialog box.

The code is as follows:

1  Public classSettingitemviewextendsRelativelayout {2 3      PublicSettingitemview (context context, AttributeSet attrs,intDefstyle) {4         Super(context, attrs, defstyle);5     }6 7      PublicSettingitemview (Context context, AttributeSet attrs) {8         Super(context, attrs);9     }Ten  One      PublicSettingitemview (Context context) { A         Super(context); -     } -}

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②. Create a method that initializes the layout file (named Iniview (context context)), passing a context as a parameter to the method. In method Iniview (context context) through the View object's inflate (context context, int resource, ViewGroup root) The resource method converts a resource file (the layout file) into a View object and loads it into the ViewGroup, with the parameter context contexts being a contextual,int resource is the resource file that needs to be converted (This is the newly created XML file (Model_setting_item.xml), ViewGroup root is the parent component that needs to be loaded (this is settingitemview.this).

Iniview Method Code (note the COM.EXAMPLE.MOBILESAFE.R resource bundle when you import the R package):

1 Private void Iniview (Context context) {2         View.inflate (context, R.layout.model_setting_item, Settingitemview.  this); 3     }

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③. A method Iniview (context) that initializes the layout file in three constructor methods.

4. Use a custom combo control.

　　　　In the layout file (here or in the Settings center layout file Activity_setting.xml as an example) to add a custom composite control, which is defined in the The relative layout in the Activity_setting.xml file creates a control with the full path name of the custom control, setting properties such as width, height, and ID.

The code is as follows:

1  <Com.example.mobilesafe.ui.SettingItemView2         android:id= "@+id/setting_update"3          android:layout_width= "Wrap_content"4         android:layout_height= "Wrap_content" >5     </com.example.mobilesafe.ui.SettingItemView>

View Code

Android instance-Mobile security Defender (vii)-Custom combo controls