package com.bottle.bottlelilibrary.view;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.PixelFormat;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.util.AttributeSet;/** * 自定义ImageView，将图片转换为圆形 */public class XCRoundImageView extends android.support.v7.widget.AppCompatImageView {    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     */    @Override    protected void onDraw(Canvas canvas) {        Drawable drawable = getDrawable();        if (null != drawable) {//            Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();//此方法报错            Bitmap bitmap = drawableToBitmap(drawable);//使用此方法将drawable转换成bitmap            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);        }    }    /**     * 将Drawable转换成bitmap     *     * @param drawable     * @return     */    public static Bitmap drawableToBitmap(Drawable drawable) {        int w = drawable.getIntrinsicWidth();        int h = drawable.getIntrinsicHeight();        Bitmap.Config config =                drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888                        : Bitmap.Config.RGB_565;        Bitmap bitmap = Bitmap.createBitmap(w, h, config);        //注意，下面三行代码要用到，否则在View或者SurfaceView里的canvas.drawBitmap会看不到图        Canvas canvas = new Canvas(bitmap);        drawable.setBounds(0, 0, w, h);        drawable.draw(canvas);        return bitmap;    }    /**     * 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(), Bitmap.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;    }}