dfinity-candid-lite

This is the lighter version of the ic4j-candid

Documentation

From ic4j-candid version 0.7.4, mobile users can also start building their application on top of ICP using the Java SDK.

The Android Developer's preferred way to interact with the canister is via POJO class.

For the demonstration purpose, I have built a Tweet's App on top of ICP. This can be found here

To start building an Android app on ICP, refer to this repo.

Supported type mapping between Java and Candid

Candid	Java
bool	Boolean
int	BigInteger
int8	Byte
int16	Short
int32	Integer
int64	Long
nat	BigInteger
nat8	Byte
nat16	Short
nat32	Integer
nat64	Long
float32	Float, Double
float64	Double
text	String
opt	Optional
principal	Principal
vec	array, List
record	Map, Class
variant	Map, Enum
func	Func
service	Service
null	Null

POJO Java class with Candid annotations

import java.math.BigInteger;

import org.ic4j.candid.annotations.Field;
import org.ic4j.candid.annotations.Name;
import org.ic4j.candid.types.Type;

public class Pojo {
	@Field(Type.BOOL)
	@Name("bar")
	public Boolean bar;

	@Field(Type.INT)
	@Name("foo")
	public BigInteger foo;
}

Pojo pojoValue = new Pojo();
				
pojoValue.bar = new Boolean(false);
pojoValue.foo = BigInteger.valueOf(43); 
				

Build

You need JDK 8+ to build IC4J Candid.