圆形

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//类名XCRoundImageView

package com.bwie.myview;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.widget.ImageView;public class XCRoundImageView extends ImageView {private Paint paint;public XCRoundImageView(Context context) {this(context, null);}public XCRoundImageView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public XCRoundImageView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);paint = new Paint();}/** * * 绘制圆形图片 *  * @author caizhiming */@Overrideprotected void onDraw(Canvas canvas) {Drawable drawable = getDrawable();if (null != drawable) {Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();Bitmap b = getCircleBitmap(bitmap, 14);final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());paint.reset();canvas.drawBitmap(b, rectSrc, rectDest, paint);} else {super.onDraw(canvas);}}/** * * 获取圆形图片方法 *  * @param bitmap * @param pixels * @return Bitmap * @author caizhiming */private Bitmap getCircleBitmap(Bitmap bitmap, int pixels) {Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(), Config.ARGB_8888);Canvas canvas = new Canvas(output);final int color = 0xff424242;final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());paint.setAntiAlias(true);canvas.drawARGB(0, 0, 0, 0);paint.setColor(color);int x = bitmap.getWidth();canvas.drawCircle(x / 2, x / 2, x / 2, paint);paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));canvas.drawBitmap(bitmap, rect, rect, paint);return output;}}

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