@Test
public void testFetchAddressList() {

    List<AddressEntity> entityList = new ArrayList<>();
    AddressEntity entity = new AddressEntity();
    entity.setAddress("0x15asd35f5ad5fa34s5df4as53");
    entity.setAvatar("");
    entity.setName("qianbao-1");
    entity.setUuid(UUID.randomUUID().toString());
    entityList.add(entity);
    AddressEntity entity2 = new AddressEntity();
    entity2.setAddress("0x15asd35f5ad5fa34s5df4as53");
    entity2.setAvatar("");
    entity2.setName("qianbao-2");
    entity2.setUuid(UUID.randomUUID().toString());
    entityList.add(entity2);
    AddressEntity entity3 = new AddressEntity();
    entity3.setAddress("0x15asd35f5ad5fa34s5df4as53");
    entity3.setAvatar("");
    entity3.setName("qianbao-3");
    entity3.setUuid(UUID.randomUUID().toString());
    entityList.add(entity3);
    AddressEntity entity4 = new AddressEntity();
    entity4.setAddress("0x15asd35f5ad5fa34s5df4as53");
    entity4.setAvatar("");
    entity4.setName("qianbao-4");
    entity4.setUuid(UUID.randomUUID().toString());
    entityList.add(entity4);
    Flowable.fromIterable(entityList).filter(new Predicate<AddressEntity>() {
        @Override
        public boolean test(AddressEntity addressInfoEntity) throws Exception {
            return addressInfoEntity != null;
        }
    }).map(new Function<AddressEntity, Address>() {
        @Override
        public Address apply(AddressEntity addressInfoEntity) throws Exception {
            return new Address(addressInfoEntity.getUuid(), addressInfoEntity.getName(), addressInfoEntity.getAddress(), addressInfoEntity.getAvatar());
        }
    }).toList()
            .subscribe(new BiConsumer<List<Address>, Throwable>() {
                @Override
                public void accept(List<Address> addressEntities, Throwable throwable) throws Exception {
                    assertNotNull(addressEntities);
                    for (Address address : addressEntities) {
                        System.out.println(address.getUuid() + "===============" + address.getName());
                    }
                }
            });
}