Android self-defined rounded corners ImageView

We often see images in some apps that show rounded corners. For example, QQ's contact icon and so on, to achieve a rounded picture is a way to directly use the rounded picture resources, of course, without rounded corners picture resources. We are also able to implement our own programs, and here is a way to define your own fillet ImageView:

Package Com.yulongfei.imageview;import Android.content.context;import Android.content.res.typedarray;import Android.graphics.bitmap;import Android.graphics.bitmap.config;import Android.graphics.canvas;import Android.graphics.color;import Android.graphics.paint;import Android.graphics.path;import Android.graphics.porterduff;import Android.graphics.porterduffxfermode;import Android.graphics.RectF;import Android.util.attributeset;import Android.widget.imageview;public class Roundangleimageview extends ImageView { private int roundwidth = 13;private int roundheight = 13;public Roundangleimageview (context context) {super (context); init (context, null);} Public Roundangleimageview (context context, AttributeSet attrs, int defstyle) {Super (context, attrs, defstyle); Init ( context, attrs);} Public Roundangleimageview (context context, AttributeSet Attrs) {Super (context, attrs); init (context, attrs);} private void init (context context, AttributeSet attrs) {if (attrs! = null) {TypedArray a = Context.obtainStyledattributes (attrs,r.styleable.roundangleimageview); roundwidth = A.getdimensionpixelsize ( R.styleable.roundangleimageview_roundwidth, roundwidth); roundheight = A.getdimensionpixelsize ( R.styleable.roundangleimageview_roundheight, Roundheight); A.recycle ();} else {float density = context.getresources (). Getdisplaymetrics (). Density;roundwidth = (int) (roundwidth * density); Roundheight = (int) (roundheight * density);}} /** Rewrite Draw () */@Overridepublic void draw (canvas canvas) {//Instantiate a bitmapbitmap of the same size as imageview bitmap = Bitmap.createbitmap (GetWidth (), GetHeight (), config.argb_8888);//Instantiate a canvas, this canvas corresponding memory for the above Bitmapcanvas CANVAS2 = new Canvas (bitmap), if (bitmap.isrecycled ()) {bitmap = Bitmap.createbitmap (GetWidth (), GetHeight (), config.argb_8888); canvas2 = new Canvas (bitmap);} Draw ImageView himself to the CANVAS2, which causes bitmap to store Imageviewsuper.draw (CANVAS2);//Use canvas to draw a rounded rectangle, This will change bitmap data drawroundangle (CANVAS2);//Draw the cropped bitmap to the current canvas on the system so that the cropped imageview can be displayed on the screen paint paint = new paint () ;p Aint.setxfermodE (null); Canvas.drawbitmap (bitmap, 0, 0, paint); Bitmap.recycle ();} public void setroundwidth (int roundwidth, int roundheight) {this.roundwidth = Roundwidth;this.roundheight = RoundHeight;}        private void Drawroundangle (canvas canvas) {Paint maskpaint = new Paint ();        Maskpaint.setantialias (True); Maskpaint.setxfermode (new Porterduffxfermode (PorterDuff.Mode.CLEAR));          Path Maskpath = new Path ();                Maskpath.addroundrect (New RECTF (0.0F, 0.0F, GetWidth (), GetHeight ()), Roundwidth, Roundheight, Path.Direction.CW); This is the fill mode set.        Very critical Maskpath.setfilltype (Path.FillType.INVERSE_WINDING); Canvas.drawpath (Maskpath, Maskpaint);}}

Android self-defined rounded corners ImageView