Surfaceview's Supplement

1, when to use: when the custom view needs frequent refresh, or refresh the data is relatively large, it is recommended to use Surfaceview instead of using the view

2. Steps to inherit Surfaceview: ①, Inherit Surfaceview class ②, Inherit Sufaceholder.callback interface, and runnable interface override the following methods

③, get Surfaceholder and join the callback interface

④, when surfacecreated () is callback, the thread is started

 Public void surfacecreated (Surfaceholder holder) {    new Thread (this). Start ();  }

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⑤, set a while () loop in the Run () method, and always draw the view

 Public void run () {  while (isdrawing) {    draw (); // always draw   }}

⑥, get the canvas provided by Surfaceview (see)

 Public void Draw () {  try{    = Mholder.lockcanvas ();  } Catch (Exception p) {       }finally{    mcanvas.unlockcanvasandpost (Mcanvas);}    }

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Surfaceview's Supplement