Android(安卓)ImageView部分圆图处理组件 xutils兼容问题

我用的是一个RoundImageView.java自定义圆图组件:

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);    }    @SuppressLint("DrawAllocation")    @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 = null;        if (drawable instanceof BitmapDrawable) {            b = ((BitmapDrawable) drawable).getBitmap();        } else if (drawable instanceof AsyncDrawable) {            //添加这个判断只为支持xutils            b = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),                    drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);            Canvas canvas1 = new Canvas(b);            // canvas.setBitmap(bitmap);            drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());            drawable.draw(canvas1);        }        Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);        if (defaultWidth == 0) {            defaultWidth = getWidth();        }        if (defaultHeight == 0) {            defaultHeight = getHeight();        }        // 保证重新读取图片后不会因为图片大小而改变控件宽、        //高的大小（针对宽、高为wrap_content布局的imageview，但会导致margin无效）        int radius = 0;        // 定义画两个边框，分别为外圆边框和内圆边框        if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {            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);        // bitmap回收(recycle导致在布局文件XML看不到效果)        // bmp.recycle();        // squareBitmap.recycle();        // scaledSrcBmp.recycle();        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);    }}

如果使用xutils加载图片的朋友可能有的时候用上这种圆图处理会报异常

java.lang.Class Cast Exception: com.lidroid.xutils.bitmap.core.Async Drawable cannot be cast to android.graphics.drawable.BitmapDrawable

在其中加上这个判断就OK了

  if(drawable instanceof BitmapDrawable){          b =  ((BitmapDrawable)drawable).getBitmap() ;      }else if(drawable instanceof AsyncDrawable){          b = Bitmap                   .createBitmap(                   getWidth(),                   getHeight(),                   drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888                   : Bitmap.Config.RGB_565);                 Canvas canvas1 = new Canvas(b);                 // canvas.setBitmap(bitmap);                 drawable.setBounds(0, 0, getWidth(),                   getHeight());                 drawable.draw(canvas1);     }

相关圆图组件还有很多:
https://github.com/vinc3m1/RoundedImageView
此组件　用于圆角。圆图，但不支持xutils显示

https://github.com/lopspower/CircularImageView
这个同样不支持xutils

https://github.com/hdodenhof/CircleImageView
这个也不错。同样不支持xutils

以上开源组件稍作修改便可支持xutils

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