ImageTools.java 文件源码

/**
 *图片阴影
 * @param originalBitmap
 */
public static Drawable drawImageDropShadow(Bitmap originalBitmap, Context context) {

    BlurMaskFilter blurFilter = new BlurMaskFilter(3,BlurMaskFilter.Blur.NORMAL);
    Paint shadowPaint = new Paint();
    shadowPaint.setAlpha(80);
    shadowPaint.setColor(context.getResources().getColor(R.color.black));
    shadowPaint.setMaskFilter(blurFilter);
    int[] offsetXY = new int[2];
    Bitmap shadowBitmap = originalBitmap.extractAlpha(shadowPaint, offsetXY);
    Bitmap shadowImage32 = shadowBitmap.copy(Bitmap.Config.ARGB_8888, true);
    if ( !shadowImage32.isPremultiplied() )
    {
        shadowImage32.setPremultiplied( true );
    }
    Canvas c = new Canvas(shadowImage32);
    c.drawBitmap(originalBitmap, offsetXY[0], offsetXY[1], null);
    return new BitmapDrawable(shadowImage32);
}