"Android Learning Notes" Rounded rectangle imageview the implementation and use of custom controls

In the process of doing an Android project, we always encounter the need to use rounded rectangle controls to display icons, pictures, or buttons, one solution is to create a shape layout XML file under Drawable, and a custom control class that inherits from ImageView. Here is a concrete way to achieve this.

First we name a Xcroundrectimageview class and inherit from ImageView. The code is as follows:

1 ImportAndroid.content.Context;2 ImportAndroid.graphics.Bitmap;3 ImportAndroid.graphics.Bitmap.Config;4 ImportAndroid.graphics.Canvas;5 ImportAndroid.graphics.Paint;6 ImportAndroid.graphics.PixelFormat;7 ImportAndroid.graphics.RectF;8 ImportAndroid.graphics.PorterDuff.Mode;9 ImportAndroid.graphics.PorterDuffXfermode;Ten ImportAndroid.graphics.Rect; One Importandroid.graphics.drawable.BitmapDrawable; A Importandroid.graphics.drawable.Drawable; - ImportAndroid.util.AttributeSet; - ImportAndroid.widget.ImageView; the  - 
 -  - /** + * Created by Yang on 2016-03-18. - * Custom Rounded rectangle ImageView that can be used directly when the component is in the layout.  +  */ A  Public classXcroundrectimageviewextendsImageView { at     Privatepaint paint; -  -      PublicXcroundrectimageview (Context context) { -          This(Context,NULL); -     } -  in      PublicXcroundrectimageview (Context context, AttributeSet attrs) { -          This(context, Attrs, 0); to     } +  -      PublicXcroundrectimageview (context context, AttributeSet attrs,intDefstyle) { the         Super(context, attrs, defstyle); *Paint =NewPaint (); $     }Panax Notoginseng  -     /** the * Draw Rounded Rectangle picture +      */ A @Override the     protected voidOnDraw (canvas canvas) { +Drawable drawable =getdrawable (); -         if(NULL!=drawable) { $Bitmap Bitmap =NULL; $             if(drawableinstanceofbitmapdrawable) { -Bitmap =((bitmapdrawable) drawable). Getbitmap (); -}Else if(drawableinstanceofasyncdrawable) { theBitmap =Bitmap.createbitmap (GetWidth (), - getheight (),WuyiDrawable.getopacity ()! = Pixelformat.opaque?Bitmap.Config.ARGB_8888:Bitmap.Config.RGB_565); theCanvas CANVAS1 =NewCanvas (bitmap); -Drawable.setbounds (0, 0, GetWidth (), getheight ()); Wu Drawable.draw (CANVAS1); -             } About             //10 rounded angular angle size for the set fillet, modifiable $Bitmap B = Getroundbitmap (Bitmap, 10); -             FinalRect RECTSRC =NewRect (0, 0, B.getwidth (), B.getheight ()); -             FinalRect rectdest =NewRect (0, 0, GetWidth (), getheight ()); - Paint.reset (); A Canvas.drawbitmap (b, Rectsrc, rectdest, paint); +}Else { the             Super. OnDraw (canvas); -         } $     } the  the     /** the * Get Rounded Rectangle picture method the      * @paramBitmap -      * @returnBitmap in      */ the     PrivateBitmap Getroundbitmap (Bitmap Bitmap,introundpx) { theBitmap output =Bitmap.createbitmap (Bitmap.getwidth (), Bitmap.getheight (), config.argb_8888); AboutCanvas Canvas =NewCanvas (output); the         Final intcolor = 0xff424242; the         FinalRect rect =NewRect (0, 0, Bitmap.getwidth (), Bitmap.getheight ()); the         FinalRECTF RECTF =NewRECTF (rect); +Paint.setantialias (true); -Canvas.drawargb (0, 0, 0, 0); the paint.setcolor (color);Bayi         intx =bitmap.getwidth (); the Canvas.drawroundrect (RECTF, ROUNDPX, ROUNDPX, paint); thePaint.setxfermode (NewPorterduffxfermode (mode.src_in)); - canvas.drawbitmap (Bitmap, rect, rect, paint); -         returnoutput; the     } the}

Just refer to the custom control where the rounded rectangle is needed, as shown in the code below

< <!-- your package name-- > . View. Xcroundrectimageview                    android:id= "@+id/xcroundrectimageview"                    android:layout_width= "Wrap_content"                    android:layout_height= "Wrap_content"/>

Android Learning notes Rounded rectangle ImageView the implementation and use of custom controls