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RoundImageView.java

<†·Ÿ"http://www.bkjia.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+PC9wPgo8cHJlIGNsYXNzPQ=="brush:java;">package com.dxd.roundimageview;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.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.graphics.drawable.NinePatchDrawable;import android.util.AttributeSet;import android.util.Log;import android.widget.ImageView;import com.alan.myimageview.R;/** * Ô²ÐÎImageView£¬¿ÉÉèÖÃ×î¶àÁ½¸ö¿í¶È²»Í¬ÇÒÑÕÉ«²»Í¬µÄÔ²Ðα߿ò¡£ * ÉèÖÃÑÕÉ«ÔÚxml²¼¾ÖÎļþÖÐÓÉ×Ô¶¨ÒåÊôÐÔÅäÖòÎÊýÖ¸¶¨ */public class RoundImageView extends ImageView {private int mBorderThickness = 0;private Context mContext;private int defaultColor = 0xFFFFFFFF;// Èç¹ûÖ»ÓÐÆäÖÐÒ»¸öÓÐÖµ£¬ÔòÖ»»Ò»¸öÔ²Ðα߿òprivate int mBorderOutsideColor = 0;private int mBorderInsideColor = 0;// ¿Ø¼þĬÈϳ¤¡¢¿íprivate int defaultWidth = 0;private int defaultHeight = 0;public RoundImageView(Context context) {super(context);mContext = context;}public RoundImageView(Context context, AttributeSet attrs) {super(context, attrs);mContext = context;setCustomAttributes(attrs);}public RoundImageView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);mContext = context;setCustomAttributes(attrs);}private void setCustomAttributes(AttributeSet attrs) {TypedArray a = mContext.obtainStyledAttributes(attrs,R.styleable.roundedimageview);mBorderThickness = a.getDimensionPixelSize(R.styleable.roundedimageview_border_thickness, 0);mBorderOutsideColor = a.getColor(R.styleable.roundedimageview_border_outside_color,defaultColor);mBorderInsideColor = a.getColor(R.styleable.roundedimageview_border_inside_color, defaultColor);}@Overrideprotected void onDraw(Canvas canvas) {Drawable drawable = getDrawable() ; if (drawable == null) {return;}if (getWidth() == 0 || getHeight() == 0) {return;}this.measure(0, 0);if (drawable.getClass() == NinePatchDrawable.class)return;Bitmap b = ((BitmapDrawable) drawable).getBitmap();Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);if (defaultWidth == 0) {defaultWidth = getWidth();}if (defaultHeight == 0) {defaultHeight = getHeight();}int radius = 0;if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {// ¶¨Òå»Á½¸ö±ß¿ò£¬·Ö±ðΪÍâÔ²±ß¿òºÍÄÚÔ²±ß¿òradius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - 2 * mBorderThickness;// »ÄÚÔ²drawCircleBorder(canvas, radius + mBorderThickness / 2,mBorderInsideColor);// »ÍâÔ²drawCircleBorder(canvas, radius + mBorderThickness + mBorderThickness / 2, mBorderOutsideColor);} else if (mBorderInsideColor != defaultColor && mBorderOutsideColor == defaultColor) {// ¶¨Òå»Ò»¸ö±ß¿òradius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor);} else if (mBorderInsideColor == defaultColor && mBorderOutsideColor != defaultColor) {// ¶¨Òå»Ò»¸ö±ß¿òradius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderOutsideColor);} else {// ûÓб߿òradius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2;}Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight / 2 - radius, null);}/** * »ñÈ¡²Ã¼ôºóµÄÔ²ÐÎͼƬ * @param radius°ë¾¶ */public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {Bitmap scaledSrcBmp;int diameter = radius * 2;// ΪÁË·ÀÖ¹¿í¸ß²»ÏàµÈ£¬Ôì³ÉÔ²ÐÎͼƬ±äÐΣ¬Òò´Ë½ØÈ¡³¤·½ÐÎÖд¦ÓÚÖмäλÖÃ×î´óµÄÕý·½ÐÎͼƬint bmpWidth = bmp.getWidth();int bmpHeight = bmp.getHeight();int squareWidth = 0, squareHeight = 0;int x = 0, y = 0;Bitmap squareBitmap;if (bmpHeight > bmpWidth) {// ¸ß´óÓÚ¿ísquareWidth = squareHeight = bmpWidth;x = 0;y = (bmpHeight - bmpWidth) / 2;// ½ØÈ¡Õý·½ÐÎͼƬsquareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight);} else if (bmpHeight < bmpWidth) {// ¿í´óÓÚ¸ßsquareWidth = squareHeight = bmpHeight;x = (bmpWidth - bmpHeight) / 2;y = 0;squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,squareHeight);} else {squareBitmap = bmp;}if (squareBitmap.getWidth() != diameter || squareBitmap.getHeight() != diameter) {scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter,diameter, true);} else {scaledSrcBmp = squareBitmap;}Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(),scaledSrcBmp.getHeight(), Config.ARGB_8888);Canvas canvas = new Canvas(output);Paint paint = new Paint();Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(),scaledSrcBmp.getHeight());paint.setAntiAlias(true);paint.setFilterBitmap(true);paint.setDither(true);canvas.drawARGB(0, 0, 0, 0);canvas.drawCircle(scaledSrcBmp.getWidth() / 2,scaledSrcBmp.getHeight() / 2, scaledSrcBmp.getWidth() / 2,paint);paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);bmp = null;squareBitmap = null;scaledSrcBmp = null;return output;}/** * ±ßÔµ»Ô² */private void drawCircleBorder(Canvas canvas, int radius, int color) {Paint paint = new Paint();/* È¥¾â³Ý */paint.setAntiAlias(true);paint.setFilterBitmap(true);paint.setDither(true);paint.setColor(color);/* ÉèÖÃpaintµÄ¡¡style¡¡ÎªSTROKE£º¿ÕÐÄ */paint.setStyle(Paint.Style.STROKE);/* ÉèÖÃpaintµÄÍâ¿ò¿í¶È */paint.setStrokeWidth(mBorderThickness);canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);}}

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