Android ImageView picture fillet display (reprint)

Source: Internet
Author: User

Reprinted from:

Android ImageView can only display the picture of the rectangle, so that does not meet our other needs, such as to display a circular picture, this time, we need to customize the ImageView, the principle is to first get to the image of the bitmap, It then trims the rounded bitmap and then draws the circular picture output in OnDraw ().

The implementation code for the custom circular ImageView class is as follows:

 Packagecom.rainwii.entity;//Package NameImportAndroid.content.Context;;;;;;;;;;ImportAndroid.util.AttributeSet;ImportAndroid.widget.ImageView;/*** * Custom circular ImageView can be used directly when the component is in the layout. *  * @authorcaizhiming **/ Public classXcroundimageviewextendsImageView {PrivatePaint paint;  PublicXcroundimageview (Context context) { This(Context,NULL); }     PublicXcroundimageview (Context context, AttributeSet attrs) { This(context, Attrs, 0); }     PublicXcroundimageview (context context, AttributeSet attrs,intDefstyle) {        Super(context, attrs, Defstyle); Paint=NewPaint (); }    /*** * Draw a circular picture * *@authorcaizhiming*/@Overrideprotected voidOnDraw (canvas canvas) {drawable drawable=getdrawable (); if(NULL!=drawable) {Bitmap Bitmap=((bitmapdrawable) drawable). Getbitmap (); Bitmap b= Getcirclebitmap (Bitmap, 14); FinalRect RECTSRC =NewRect (0, 0, B.getwidth (), B.getheight ()); FinalRect rectdest =NewRect (0, 0, GetWidth (), getheight ());            Paint.reset ();        Canvas.drawbitmap (b, Rectsrc, rectdest, paint); } Else {            Super. OnDraw (canvas); }    }    /*** * Get round picture method * *@paramBitmap *@parampixels *@returnBitmap *@authorcaizhiming*/    PrivateBitmap Getcirclebitmap (Bitmap Bitmap,intpixels) {Bitmap Output=Bitmap.createbitmap (Bitmap.getwidth (), Bitmap.getheight (), config.argb_8888); Canvas Canvas=NewCanvas (output); Final intcolor = 0xff424242; FinalRect rect =NewRect (0, 0, Bitmap.getwidth (), Bitmap.getheight ()); Paint.setantialias (true); Canvas.drawargb (0, 0, 0, 0);        Paint.setcolor (color); intx =bitmap.getwidth (); Canvas.drawcircle (x/2, X/2, X/2, paint); Paint.setxfermode (NewPorterduffxfermode (mode.src_in));        Canvas.drawbitmap (Bitmap, rect, rect, paint); returnoutput; }}

Once you have completed this custom class, you can use this class as a component in the layout, such as:

<Relativelayoutxmlns:android= "Http://"
Xmlns:tools= "Http://"
Android:layout_width= "Match_parent"
Android:layout_height= "Match_parent" > <Com.rainwii.entity.XCRoundImageViewAndroid:id= "@+id/roundimageview"
Android:layout_centerinparent= "true"
Android:layout_width= "200DP"
Android:layout_height= "200DP"
ANDROID:SRC= "@drawable/roundimageview" /></Relativelayout>

Additional Student Information:

Android ImageView picture fillet display (reprint)

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