解决方法
首先,convert bitmap to byte array
Bitmap bmp = intent.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG,100,stream);
byte[] byteArray = stream.toByteArray();
稍后,将byte []保存到Realm中
注意：字符串和字节数组(byte [])不能大于16 MB(来自Realm文档)
字段类型
Realm supports the following field types: boolean,byte,short,ìnt,long,float,double,String,Date and byte[]. The integer types byte,int,and long are all mapped to the same type (long actually) within Realm. Moreover,subclasses of RealmObject and RealmList are supported to model relationships.
