报错 Canvas: trying to use a recycled bitmap

一开始分享的代码是这样的，可以分享给WeChat、QQ、短信。发现在分享完短信在退回界面后，原本的bitmap图片不见了。日志报错trying to use a recycled bitmap。bitmap被回收掉了

if(shareDialog == null) {shareDialog = new ShareDialog();BitmapDrawable drawable = (BitmapDrawable) ivPassport.getDrawable();Bitmap bitmap = drawable.getBitmap();//bitmap = bitmap.copy(Bitmap.Config.ARGB_4444, true);String appName = AppUtils.getAppName();ShareBase.Bean bean = new ShareBase.Bean(this).setBitmap(bitmap).setUrl("http://www.hikvision.com/").setContent(String.format(Locale.getDefault(), "分享自%s", TextUtils.isEmpty(appName) ? "访客管理APP" : appName)).setTitle("访客二维码").setShareImage(true);shareDialog.setBean(bean);}shareDialog.show(getSupportFragmentManager(),"shareDialog");

解决方法：加上注释掉的那句代码，copy一个bitmap副本