Learning Satellite Menu

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Transfer from http://www.cnblogs.com/persist-confident/p/4487386.html

Read the Hyman Teacher's video, it sounds a little confused, so I want to realize the implementation of the satellite menu to summarize. Long story short, here's a summary:

One, custom ViewGroup
1), Custom properties file

The definition of the property:

<attr name= "Position" >
<enum name= "left_top" value= "0"/>
<enum name= "Left_bottom" value= "1"/>
<enum name= "Right_top" value= "2"/>
<enum name= "Right_bottom" value= "3"/>
<enum name= "Center_bottom" value= "4"/>
</attr>
<attr name= "radius" format= "Dimension"/>

It is important to note how to associate a property file with a custom ViewGroup

=====================================================

It still has problems

The main thing is that its sub-menu is not fully positioned correctly

======-------------------------The following is what he wrote (indeed a desirable place)--------------------===========

4) about the layout of custom controls

Here I focus mainly on the layout of the main menu in the middle of the following position:

First get the length width of the main menu:

int width = mcbutton.getmeasuredwidth ();
int height = mcbutton.getmeasuredheight ();

To place the main menu in the middle of the screen:

Then his x-coordinate is L = getmeasuredwidth ()/2-WIDTH/2;

The Y coordinate is: t = getmeasuredheight ()-height;

Final layout

Mcbutton.layout (L, T, L + width, t + height);

The layout location of the sub-menu

T1 = (int) (Mradius * Math.sin (Math.pi/count * (i + 1)));
l1= (int) (Mradius * Math.Cos (Math.pi/count * (i + 1)));

Coordinates of the final sub-menu

L = getmeasuredwidth ()/2-WIDTH/2-L1;
t = getmeasuredheight ()-height-t2;

Sub-menu Layout

Child.layout (L, T, L + width, t + height);

Connect it through Arcmenu, and Arcmenu is our custom ViewGroup

<declare-styleable name= "Arcmenu" >
<attr name= "position"/>
<attr name= "radius"/>
</declare-styleable>

=====================------This is his result-------===============

The end result is as follows:

=====================------This is my result-------===============

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Still need to improve, hope to know why the great God advice!

Learning Satellite Menu