RoundImageView

package org.com.cctest.view;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.widget.ImageView;import cn.sunease.yujian.R;/** * 圆形ImageView，可设置最多两个宽度不同且颜色不同的圆形边框。 * 设置颜色在xml布局文件中由自定义属性配置参数指定 */public class RoundImageView extends ImageView {   private int mBorderThickness = 0;   private Context mContext;   private int defaultColor = 0xFFFFFFFF;   // 如果只有其中一个有值，则只画一个圆形边框   private int mBorderOutsideColor = 0;   private int mBorderInsideColor = 0;   // 控件默认长、宽   private 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);   }   @Override   protected 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(Config.ARGB_8888, true);      if (defaultWidth == 0) {         defaultWidth = getWidth();      }      if (defaultHeight == 0) {         defaultHeight = getHeight();      }      int radius = 0;      if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {// 定义画两个边框，分别为外圆边框和内圆边框         radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - 2 * mBorderThickness;         // 画内圆         drawCircleBorder(canvas, radius + mBorderThickness / 2,mBorderInsideColor);         // 画外圆         drawCircleBorder(canvas, radius + mBorderThickness + mBorderThickness / 2, mBorderOutsideColor);      } else if (mBorderInsideColor != defaultColor && mBorderOutsideColor == defaultColor) {// 定义画一个边框         radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;         drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor);      } else if (mBorderInsideColor == defaultColor && mBorderOutsideColor != defaultColor) {// 定义画一个边框         radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;         drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderOutsideColor);      } else {// 没有边框         radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2;      }      Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);      canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight / 2 - radius, null);   }   /**    * 获取裁剪后的圆形图片    * @param radius半径    */   public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {      Bitmap scaledSrcBmp;      int diameter = radius * 2;      // 为了防止宽高不相等，造成圆形图片变形，因此截取长方形中处于中间位置最大的正方形图片      int bmpWidth = bmp.getWidth();      int bmpHeight = bmp.getHeight();      int squareWidth = 0, squareHeight = 0;      int x = 0, y = 0;      Bitmap squareBitmap;      if (bmpHeight > bmpWidth) {// 高大于宽         squareWidth = squareHeight = bmpWidth;         x = 0;         y = (bmpHeight - bmpWidth) / 2;         // 截取正方形图片         squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight);      } else if (bmpHeight < bmpWidth) {// 宽大于高         squareWidth = 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;   }   /**    * 边缘画圆    */   private void drawCircleBorder(Canvas canvas, int radius, int color) {      Paint paint = new Paint();      /* 去锯齿 */      paint.setAntiAlias(true);      paint.setFilterBitmap(true);      paint.setDither(true);      paint.setColor(color);      /* 设置paint的　style　为STROKE：空心 */      paint.setStyle(Paint.Style.STROKE);      /* 设置paint的外框宽度 */      paint.setStrokeWidth(mBorderThickness);      canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);   }}