Android学习-每日打卡APP-实现浏览功能

接着写每日打卡App

现在实现了浏览功能

package com.example.clockappliction;

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.TextView;
import android.widget.Toast;

import com.example.clockappliction.DataBase.CRUD;
import com.example.clockappliction.Information.Student;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btn_login, btn_reg,btn_list;

    private EditText et_log_id,et_log_name,et_log_grade,et_log_phone;

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

        btn_login = (Button) findViewById(R.id.btn_login);
        btn_login.setOnClickListener(this);

        btn_reg = (Button) findViewById(R.id.btn_reg);
        btn_reg.setOnClickListener(this);

        btn_list = (Button) findViewById(R.id.btn_list);
        btn_list.setOnClickListener(this);

        et_log_id = (EditText) findViewById(R.id.et_log_id);
        et_log_name = (EditText) findViewById(R.id.et_log_name);
        et_log_grade = (EditText) findViewById(R.id.et_log_grade);
        et_log_phone = (EditText) findViewById(R.id.et_log_phone);

    }

    @Override
    public void onClick(View view) {

        if (view == findViewById(R.id.btn_login)){

            Student student = new Student();
            CRUD crud = new CRUD(this);
            //获取输入框的学生信息
            student.id = et_log_id.getText().toString();
            student.name = et_log_name.getText().toString();
            student.grade = et_log_grade.getText().toString();
            student.phone = et_log_phone.getText().toString();
            //通过id获取数据库学生信息
            Student studentData =crud.getStudentById(student.id);
            //登录
            if (student.id.equals(studentData.id)){
                if (student.name.equals(studentData.name)){
                    if (student.grade.equals(studentData.grade)){
                        if (student.phone.equals(studentData.phone)){
                            Intent intent =new Intent(this,MenuActivity.class);
                            intent.putExtra("st_id",student.id);
                            intent.putExtra("st_name",student.name);
                            startActivity(intent);
                        }else {
                            Toast.makeText(this, "电话号码不正确", Toast.LENGTH_SHORT).show();
                        }
                    }else {
                        Toast.makeText(this, "班级不正确", Toast.LENGTH_SHORT).show();
                    }
                }else {
                    Toast.makeText(this, "姓名不正确", Toast.LENGTH_SHORT).show();
                }
            }else {
                Toast.makeText(this, "学号不正确", Toast.LENGTH_SHORT).show();
            }

        } else if (view == findViewById(R.id.btn_reg)) {
            //跳转到注册页面
            Intent intent = new Intent(this,RegActivity.class);
            intent.putExtra("keys",0);
            startActivity(intent);
        } else if(view == findViewById(R.id.btn_list)){
            Intent intent = new Intent(this,ListActivity.class);

            startActivity(intent);
        }


    }

}

package com.example.clockappliction;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class MyListAdapter extends BaseAdapter {

    private Context mContext;
    private LayoutInflater mLayoutInflater;
    public MyListAdapter(Context context){
        this.mContext = context;
        mLayoutInflater = LayoutInflater.from(context);
    }
    @Override
    public int getCount() {
        return 10;
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    static class ViewHolder{
        public TextView tv1,tv2,tv3,tv4;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder holder = null;
        if (view == null){
            view = mLayoutInflater.inflate(R.layout.layout_list_item,null);
            holder =  new ViewHolder();

            holder.tv1 = (TextView) view.findViewById(R.id.tv_1);
            holder.tv2 = (TextView) view.findViewById(R.id.tv_2);
            holder.tv3 = (TextView) view.findViewById(R.id.tv_3);
            holder.tv4 = (TextView) view.findViewById(R.id.tv_4);

            view.setTag(holder);
        }else{
            holder = (ViewHolder)view.getTag();
        }
        holder.tv1.setText("日期：");
        holder.tv2.setText("关键字：");
        holder.tv3.setText("总结：");
        holder.tv4.setText("坚持天数：");

        return view;
    }

}