SplashActivity.java

package com.alorma.github.ui.activity;

import android.accounts.Account;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import java.util.List;

public class SplashActivity extends AppCompatActivity {

  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    AccountsManager accountsFragment = new AccountsManager();
    List<Account> accounts = accountsFragment.getAccounts(this);

    if (accounts.isEmpty()) {
      Intent intent = new Intent(this, WelcomeActivity.class);
      startActivity(intent);
      finish();
    } else {
      Intent intent = new Intent(this, MainActivity.class);
      startActivity(intent);
      finish();
    }
  }
}