Android custom control to achieve the effect of temperature rotation button
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Android
First look at the renderings
Realization idea
Implementation method
Initialize some parameters
Draw dial
Take the center of the screen as the origin of the canvas, the arc angle is 270 °, and draw the dials in unselected and selected states.
The additional 2 ° in the rotation method is the result of later adjustment, so don't care.
Draw an arc under the dial
Draw title and temperature identification
Draw rotation button
Draw temperature
Handling sliding events
Provide some interface methods
summary
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