Android custom View identifies the currently selected control

One value is the code posted by an online friend. It is very convenient and you can learn a lot. this time I also posted some simple little things. I don't really want to describe graph-based code...
 
Subject Code
 
Myview code
Package com. suncco. taoxie;
 
Import android. content. Context;
Import android. content. res. TypedArray;
Import android. graphics. Canvas;
Import android. graphics. Paint;
Import android. util. AttributeSet;
Import android. util. Log;
Import android. view. View;
 
Public class MyView extends View {
Private int count;
Private float space, radii;
Private int point_normal_color, point_seleted_color;
 
// Select
Private int selected = 0;
 
// Background seleted normal
 
Public MyView (Context context, AttributeSet attrs ){
Super (context, attrs );
TypedArray a = context
. ObtainStyledAttributes (attrs, R. styleable. MyView );
 
Count = a. getInteger (R. styleable. MyView_count, 3 );
Space = a. getDimension (R. styleable. MyView_space, 9 );
Radii = a. getDimension (R. styleable. MyView_point_radii, 9 );
 
Point_normal_color = a. getColor (R. styleable. MyView_point_normal_color,
0x000000 );
Point_seleted_color = a. getColor (
R. styleable. MyView_point_seleted_color, 0xffff07 );
 
Int sum = attrs. getAttributeCount ();
A. recycle ();
}
 
Public void setCount (int count ){
This. count = count;
Invalidate ();
}
 
Public void next (){
If (selected <count-1)
Selected ++;
Else
Selected = 0;
Invalidate ();
}
 
Public void previous (){
If (selected> 0)
Selected --;
Else
Selected = count-1;
Invalidate ();
}
 
@ Override
Protected void onDraw (Canvas canvas ){
Paint paint = new Paint ();
Paint. setAntiAlias (true );
// Start position to center the whole
Float w = canvas. getWidth ()-(count * 2 * radii)-space * (count-1 );
 
For (int I = 0; I <count; I ++ ){
If (I = selected)
Paint. setColor (point_seleted_color );
Else
Paint. setColor (point_normal_color );
Canvas. drawCircle (w/2.f + radii + I * (space + radii ),
Radii + 1, (int) radii + 2)/2, paint );
}
}
 
@ Override
Protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec ){
Super. onMeasure (widthMeasureSpec, heightMeasureSpec );
SetMeasuredDimension (widthMeasureSpec, (int) (radii * 2) + 2 );
}
 
Public void setSelected (int selectedId ){
If (selectedId> = 0 & selectedId <= count)
This. selected = selectedId;
Else if (selectedId <0)
This. selected = 0;
Else if (selectedId> count)
This. selected = count;
Invalidate ();
}
 
}
 
Custom namespace of the custom View:
The following custom attributes, such as count: total number, space: distance of each point, and so on, are commonly obtained...
 
The namespace is also called myview... code.
*** _ Attrs. xml of this file put in value. For example, I will go to haowuliaoa_attrs.xml here.
The namespace is also called myview... code.
<? Xml version = "1.0" encoding = "UTF-8"?>
<Resources>
<Declare-styleable name = "MyView">
<Attr name = "count" format = "integer"/>
<Attr name = "space" format = "dimension"/>
<Attr name = "point_size" format = "dimension"/>
<Attr name = "point_seleted_color" format = "color | reference"/>
<Attr name = "point_normal_color" format = "color | reference"/>
<Attr name = "point_radii" format = "dimension"/>
</Declare-styleable>
</Resources>
 
 
Everything is okay. You can apply it directly on the xml layout...
 
 
Xml Code
First, add your own namespace in the layout header.
Xmlns: haowuliaoa = "Name of the package at http://schemas.android.com/apk/res"
Xml Code
Then there is the xml layout...
Xml Code
<Package name. MyView android: id = "@ + id/myView"
Android: layout_width = "fill_parent" android: layout_height = "10dip"
Android: background = "#00000000" android: gravity = "center"
Android: layout_marginBottom = "4dip" suncco: count = "6" suncco: space = "10dip"
Suncco: point_size = "4dip" suncco: point_seleted_color = "# ff0000"
Suncco: point_normal_color = "# ffffff" suncco: point_radii = "5dip"/>
 
So is simple ....
The smaller points in the image are the results of today.
Functions are often used...

Author "whyhappy"