原生android学生信息管理系统源码，学生信息管理系统APP源码，连接阿里云数据库

package com.example.yangguoying; import androidx.annotation.Nullable; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import androidx.viewpager.widget.ViewPager; import android.app.ProgressDialog; import android.content.ContentValues; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.Button; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.PopupMenu; import android.widget.TabHost; import android.widget.Toast; import com.example.yangguoying.SqLiteDatabase.GetDatabase; import com.example.yangguoying.adapter.StudentInfoAdapter; import com.example.yangguoying.adapter.ViewPagerAdapter; import com.example.yangguoying.datasource.DataSource; import com.example.yangguoying.entity.StudentInfo; import com.example.yangguoying.util.JDBC.JDBCAPI.JDBCUtilImpl; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Objects; public class MainActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener{ ImageButton edit_button; SharedPreferences.Editor dataEdit; SharedPreferences getDataEdit; Button main_add_student_info; ListView main_student_info_list; StudentInfoAdapter studentInfoAdapter; List<StudentInfo> list; DataSource dataSource; JDBCUtilImpl jdbcUtil; GetDatabase database; SQLiteDatabase sqLiteDatabase; Cursor cursor; StudentInfo studentInfo; ContentValues contentValues; ProgressDialog progressDialog; Button view_one_button; Button view_tow_button; LinearLayout view_one_line; LinearLayout view_tow_line; Button cloud_view_button; List<StudentInfo> cloud_list; ListView cloud_view_list; StudentInfoAdapter cloudStudentInfoAdapter; private LayoutInflater layoutInflater; private ViewPager viewPager; private ViewPagerAdapter viewPagerAdapter; private List<View> viewList; private View viewOne; private View viewTow; private int curIndex = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); setView(); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode){ case 1: onLoadStudentInfo(); break; case 2: case 4: case 6: studentInfoAdapter.notifyDataSetChanged(); break; } } private void initView() { edit_button = findViewById(R.id.edit_button); dataEdit = getSharedPreferences("user_data",MODE_PRIVATE).edit(); getDataEdit = getSharedPreferences("user_data",MODE_PRIVATE); main_add_student_info = findViewById(R.id.main_add_student_info); // main_student_info_list = findViewById(R.id.main_student_info_list); dataSource = new DataSource(); jdbcUtil = new JDBCUtilImpl(dataSource.getConnectionUrl(),dataSource.getDatabaseUser(),dataSource.getDatabasePassword(),"com.mysql.jdbc.Driver"); database = new GetDatabase(); sqLiteDatabase = database.getDatabase(this).getWritableDatabase(); contentValues = new ContentValues(); progressDialog = new ProgressDialog(MainActivity.this); view_one_button = findViewById(R.id.view_one_button); view_tow_button = findViewById(R.id.view_tow_button); view_one_line = findViewById(R.id.view_one_line); view_tow_line = findViewById(R.id.view_tow_line); layoutInflater = LayoutInflater.from(this); viewList = new ArrayList<>(); viewPager = findViewById(R.id.view_pager); viewOne = layoutInflater.inflate(R.layout.local_database_view,null); viewTow = layoutInflater.inflate(R.layout.cloud_database_view,null); viewList.add(viewOne); viewList.add(viewTow); viewPagerAdapter = new ViewPagerAdapter(viewList); viewPager.setAdapter(viewPagerAdapter); viewPager.setCurrentItem(curIndex); viewPager.setOffscreenPageLimit(2); viewPager.addOnPageChangeListener(this); main_student_info_list =viewOne.findViewById(R.id.main_student_info_list); onLoadStudentInfo(); cloud_view_button = viewTow.findViewById(R.id.cloud_view_button); cloud_view_list = viewTow.findViewById(R.id.cloud_view_list); cloudStudentInfoAdapter = new StudentInfoAdapter(MainActivity.this,cloud_list); } private void setView() { main_student_info_list.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent intent = new Intent(MainActivity.this,ShowStudentInfoActivity.class); intent.putExtra("id",list.get(position).getId()); intent.putExtra("isCloud",false); startActivityForResult(intent,2); } }); main_add_student_info.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this, AddStudentInfoActivity.class); startActivityForResult(intent, 1); finish(); } }); main_student_info_list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setTitle("提示"); builder.setMessage("确认删除学生信息"); builder.setPositiveButton("删除", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //TODO 删除本地数据 sqLiteDatabase.delete("student_info","student_info_id = ?",new String[]{String.valueOf(list.get(position).getId())}); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } AlertDialog.Builder builder_delete_cloud = new AlertDialog.Builder(MainActivity.this); builder_delete_cloud.setTitle("提示"); builder_delete_cloud.setMessage("是否删除云数据信息"); builder_delete_cloud.setPositiveButton("删除", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //TODO 删除云数据 new Thread(new Runnable() { @Override public void run() { jdbcUtil.deleteData("DELETE FROM `student_info` WHERE `student_info_id` = ?",new Object[]{list.get(position).getId()}); deleteBefore(position); }