I am trying to set multiple values in hashmap in my android app. Some values are String
and one value I want to send is an array of objects I created OnlineTestResultPOJO
. Following is the code which I want to implement.
OnlineTestResultPOJO[] records = db.resultDao().getRecords();
HashMap<String, String> map = new HashMap<>();
map.put("dbname",dbname);
map.put("class",clas);
map.put("rollno",rollno);
map.put("access_token",accessToken);
map.put("records_arr", records);
Obviously it is giving error in the last line as it is not String
, but is it possible to set all of these things in one HashMap
? I tried wrapping it with String.valueOf(records)
, but that spoils the working of object producing unexpected results. Any alternate solution to achieve this?
Create map as below:
HashMap<String, Object> map = new HashMap<>();
Just declare your map like this:
HashMap<String, Object> map = new HashMap<>();
eg Object type for the value.
You can serialize Object to String and save it to HashMap as a String.
// serialize the object
try {
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream so = new ObjectOutputStream(bo);
so.writeObject(myObject);
so.flush();
serializedObject = bo.toString();
} catch (Exception e) {
System.out.println(e);
}
// deserialize the object
try {
byte b[] = serializedObject.getBytes();
ByteArrayInputStream bi = new ByteArrayInputStream(b);
ObjectInputStream si = new ObjectInputStream(bi);
MyObject obj = (MyObject) si.readObject();
} catch (Exception e) {
System.out.println(e);
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.