3. Use the drawing API to customize the view---rotated squares

1 ImportAndroid.content.Context;2 ImportAndroid.graphics.Canvas;3 ImportAndroid.graphics.Color;4 ImportAndroid.graphics.Paint;5 ImportAndroid.util.AttributeSet;6 ImportAndroid.view.View;7 8 /**9 * Rotation of the blockTen  *  One  * @authorDr A  */ -  Public classRotatingrectextendsView { -  the     PrivatePaint p;//Brush Objects -     Private floatdegrees = 0; -  -     /**used by the resource resolver .*/ +      PublicRotatingrect (context context, AttributeSet attrs,intdefstyleattr) { -         Super(context, attrs, defstyleattr); +  A initproperties (); at     } -  -      PublicRotatingrect (Context context, AttributeSet attrs) { -         Super(context, attrs); -  - initproperties (); in     } -  to      PublicRotatingrect (Context context) { +         Super(context); -  the initproperties (); *     } $ Panax Notoginseng     /**Initialize Properties*/ -     Private voidInitProperties () { thep =NewPaint (); +P.setcolor (color.red);//Set Red A     } the  + @Override -      Public voidDraw (canvas canvas) { $         Super. Draw (canvas); $  -Canvas.save ();//Save State -         //canvas.rotate (degrees); //rotate around the upper left corner theCanvas.translate (200, 200);//adjust the position, in order to show the full.  -Canvas.rotate (degrees, 50, 50);//rotates around the center point. Wuyi         //0, 0, 100, 100 the value of the distance boundary.  theCanvas.drawrect (0, 0, 100, 100, p); -  Wudegrees++; -Canvas.restore ();//Recovery About  $         //make it invalid. So when you redraw again, check to see if the view is in a valid state, - invalidate ();  -     } -  A}

1 < Com.jikexueyuan.drawapi.RotatingRect 2         Android:layout_width = "Fill_parent" 3         android:layout_height= "fill_parent"/>

3. Use the drawing API to customize the view---rotated squares