冲刺（十一）

  这是一个关于登陆进入对应用户界面的几个功能。

package com.example.shazidouhuiapp.activity;

import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import com.example.shazidouhuiapp.Bean.User;
import com.example.shazidouhuiapp.MainActivity;
import com.example.shazidouhuiapp.R;

import java.util.Timer;
import java.util.TimerTask;

import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.BmobUser;
import cn.bmob.v3.exception.BmobException;
import cn.bmob.v3.listener.QueryListener;

public class splash extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);
        Timer timer = new Timer();
        timer.schedule(timertask, 2000);
        Bmob.initialize(this,"e575c228703fd6ae7b822919edc18236");
    }

    TimerTask timertask = new TimerTask() {
        @Override
        public void run() {
            BmobUser currentUser = BmobUser.getCurrentUser(User.class);
            //逻辑判断是否登录，登陆了进入对应用户界面
            if (currentUser!=null) {
                String id=currentUser.getObjectId();
                BmobQuery<User> query=new BmobQuery<>();
                query.getObject(id, new QueryListener<User>() {
                    @Override
                    public void done(User user, BmobException e) {
                        if(user.getType().equals("student")){
                            startActivity(new Intent(splash.this, studentinterface.class));
                        }
                        else if(user.getType().equals("teacher")){
                            startActivity(new Intent(splash.this,teacherinterface.class));
                        }
                    }
                });

            }
            else {
                startActivity(new Intent(splash.this, mobloging.class));
           }

        }
    };
}