Android Chinese API (17) -- textswitcher

Source: Internet
Author: User

Preface

This chapter is about Android. widget. textswitcher. It is translated into a Text Converter Control (derived from the famous door series) and translated from madgoat. You are welcome to visit his blog: http://madgoat.cn/. thank madgoat again! I look forward to your participation in Android API Chinese translation, contact me over140@gmail.com.

 

Statement

You are welcome to repost, but please keep the original source of the article :)

Madgoat: http://madgoat.cn/

Blog: http://www.cnblogs.com

Farmer's uncle: http://www.cnblogs.com/over140/

 

Version

Android 2.2 r1

 

Body

I. Structure

    Public class textswitcher extends viewswitcher

 

Java. Lang. Object

Android. View. View

Android. View. viewgroup

Android. widget. framelayout

Android. widget. viewanimator

Android. widget. viewswitcher

Android. widget. textswitcher

 

Ii. Category Overview

    

Viewswitcher only contains the child-type textview. Textswitcher is used to animation the labels on the screen. When settext (charsequence) is called, textswitcher uses an animation to erase the current text and display new text content. (Note: Some animated effects are added when the text is changed)

 

Iii. Constructor

Public textswitcher (context)

Create a new blank textswitcher

Parameters

Context application context

 

Public textswitcher (context, attributeset attrs)

Use the provided context and attributes to create an empty textswitcher

Parameters

Context application environment

Attrs Attribute Set

 

Iv. Public Methods

Public void addview (view child, int index, viewgroup. layoutparams Params)

Adds a subview Based on the specified layout parameter.

Parameters

Child subview

Position of the new subview in Index

Add the layout parameters of the Child view in Params.

Throw an exception

Illegalargumentexception when the subview is not a textview instance

 

Public void setcurrenttext (charsequence text)

Set the text content of the currently displayed Text View. Non-animated display.

Parameters

New text to be displayed in text

 

Public void settext (charsequence text)

Set the text content of the next view and switch to the next view. You can exit the current text to display the next text.

Parameters

New text to be displayed in text

 

V. Sample Code

5.1 from apidemos> View> textswitcher

5.1.1 Java

Public class textswitcher1 extends activity implements viewswitcher. viewfactory,
View. onclicklistener {

Private textswitcher mswitcher;

Private int mcounter = 0;

@ Override
Protected void oncreate (bundle savedinstancestate ){
Super. oncreate (savedinstancestate );

Setcontentview (R. layout. text_switcher_1 );

Mswitcher = (textswitcher) findviewbyid (R. Id. switcher );
Mswitcher. setfactory (this );

Animation in = animationutils. loadanimation (this,
Android. R. anim. fade_in );
Animation out = animationutils. loadanimation (this,
Android. R. anim. fade_out );
Mswitcher. setinanimation (in );
Mswitcher. setoutanimation (out );

Button nextbutton = (button) findviewbyid (R. Id. Next );
Nextbutton. setonclicklistener (this );

Updatecounter ();
}

Public void onclick (view v ){
Mcounter ++;
Updatecounter ();
}

Private void updatecounter (){
Mswitcher. settext (string. valueof (mcounter ));
}

Public View makeview (){
Textview T = new textview (this );
T. setgravity (gravity. Top | gravity. center_horizontal );
T. settextsize (36 );
Return T;
}
}

5.1.2 XML

<? XML version = "1.0" encoding = "UTF-8"?>
<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "match_parent"
Android: layout_height = "match_parent"
Android: Orientation = "vertical">

<Button Android: Id = "@ + ID/next"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "@ string/text_switcher_1_next_text"/>

<Textswitcher Android: Id = "@ + ID/switcher"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"/>

</Linearlayout>

5.2 other examples

Http://tech.ddvip.com/2010-02/1265125017144500.html

Http://www.javaeye.com/topic/569985

 

6. Download

Http://download.csdn.net/source/2774515 (csdn)

 

End

Madgoat is very positive. After receiving the translation of this chapter, he quickly translated it with complete code and. Now he is translating the next translation. Thank you for your participation!

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