修改Bitmap像素颜色

需求：将一个白色图标的Bitmap修改成任意颜色

	public static Bitmap changeBitmapColor(Bitmap origBm, int color) {
	    Bitmap copyBm = origBm.copy(Bitmap.Config.ARGB_8888, true);
		final int w = copyBm.getWidth();
		final int h = copyBm.getHeight();
		for(int i=0; i<w; i++) {
			for(int j=0; j<h; j++) {
				int c = copyBm.getPixel(i, j);
				if(c != 0) {
					final int alpha = (c >> 24) & 0xff;
					if(alpha > 0 && alpha != 0xff) {
						color = (alpha << 24) | (color & 0xffffff);
					}
					copyBm.setPixel(i, j, (alpha << 24) | color);
				}
			}
		}
	    origBm = copyBm;
		return origBm;
	}