个人作业——app

本次个人作业老师让我们完成一个定时打卡app可以实现自动读取当前时间存入数据库，并且实现注册登录，

线面是一些对应的文件：

MainActivity。java

主界面 `package com.example.conect_sqlite;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import com.example.conect_sqlite.util.ToastUtil;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
//声明控件
private Button mBtnlogin ;
public EditText mEtuser;
public EditText mEtpassword;
private MySQLiteOpenHelper mMySQLiteOpenHelper;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //找到控件
    mBtnlogin = findViewById(R.id.btn_login);
    mEtuser=findViewById(R.id.et_1);
    mEtpassword=findViewById(R.id.et_2);
    mMySQLiteOpenHelper =new MySQLiteOpenHelper(this);
    //实现直接跳转

/* mBtnlogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent =null;
intent =new Intent(MainActivity.this,function.class);
startActivity(intent);

    }
});*/
    //匹配对应用户名密码才操作
mBtnlogin.setOnClickListener(this);

}


@Override
public void onPointerCaptureChanged(boolean hasCapture) {

}

@Override
public void onClick(View view ) {
    String uid=mEtuser.getText().toString();
    String password=mEtpassword.getText().toString();
    //从数据库中删除
   int row=mMySQLiteOpenHelper.searchuid(uid,password);
    if(row==1){
        ToastUtil.toastLong(this,"登录成功！");
        Intent intent=null;//这里必须声明为空然后跳转
        intent=new Intent(MainActivity.this,function.class);
       intent.putExtra("password",password);//将这个页面的数据传入到下一个页面
        startActivity(intent);
    }else{
        ToastUtil.toastLong(this,"登录失败！用户名或密码错误！");
    }

  /*  Intent intent=null;

    //名称正确进行跳转；
    if(username.equals("wqy")&&password.equals("123456"))
    {

        intent=new Intent(MainActivity.this,function.class);
        startActivity(intent);
    }else//失败弹出弹窗
    {

    }*/
}

public void zhuce(View view) {
    Intent intent =new Intent(MainActivity.this,zhuce.class);//进行跳转
    startActivity(intent);
}

}`

这里是function页面用于功能选择的
function.java
`package com.example.conect_sqlite;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class function extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_function);


}

public void insertDate(View view) {
    Intent intent=null;
            intent=this.getIntent();

  String password=intent.getStringExtra("password");
    //从上一个页面或取账号数据

 intent =new Intent(function.this,add.class);//进行跳转
    intent.putExtra("password",  password);
  //将这个页面的数据传入到下一个页面
startActivity(intent);
}

public void deleteDate(View view) {
    Intent intent =new Intent(function.this,delete.class);//进行跳转
    startActivity(intent);
}

public void updateDate(View view) {
    Intent intent=null;
    intent=this.getIntent();

    String password=intent.getStringExtra("password");
    intent=new Intent(function.this,updata.class);
    intent.putExtra("password",  password);
    startActivity(intent);
}

public void searchDate(View view) {
    Intent intent=null;
    intent=new Intent(function.this,list.class);
    startActivity(intent);
}

}add界面用于添加打卡数据package com.example.conect_sqlite;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.example.conect_sqlite.bean.student;

import java.text.SimpleDateFormat;
import java.util.Date;

public class add extends AppCompatActivity {
private EditText etname,etthing,etdate;

private MySQLiteOpenHelper mMySQLiteOpenHelper;

//名字 事件 提醒日期
//保存
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add);

    //控件初始化
    initView();
   mMySQLiteOpenHelper =new MySQLiteOpenHelper(this);
}

private void initView() {
    etname =findViewById(R.id.et_name);
    etthing=findViewById(R.id.et_thing);
    etdate=findViewById(R.id.et_date);
}

public void insertDate(View view) {
    Intent intent=null;
            intent=this.getIntent();
   String password=intent.getStringExtra("password");//从上一个页面或取账号数据
   String name= etname.getText().toString().trim();
    String thing= etthing.getText().toString().trim();
    String date= etdate.getText().toString().trim();
 student student1=new student();
 student1.setPassword(password);
 student1.setName(name);
 student1.setThing(thing);
 student1.setDate(date);
 student1.setDaytime(getCurrentTimeFormat());
 long rowId=mMySQLiteOpenHelper.insertData1(student1);
    if(rowId!=-1){
        Toast.makeText(this,"打卡成功！",Toast.LENGTH_SHORT).show();

    }else {
        Toast.makeText(this,"打卡失败！",Toast.LENGTH_SHORT).show();
    }


}
private String getCurrentTimeFormat(){//创建我们的实时获取时间。
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat( "yyy年MM月dd HH:mm:ss");
    Date date = new Date();
    return   simpleDateFormat.format(date);

}
//插入数据库中

}`