直接可用的Android studio学生信息管理系统.pdf-资料库

直接可用的Android studio学生信息管理系统直接可用的学生信息管理系统主要为大家详细介绍了直接可用的Android studio学生信息管理系统，具有一定的参考价值，感兴趣的小伙伴们可以参考一下百度上流传最广的版本有所欠缺，并不能直接使用，同时有很多不必要的功能，这是我进行删减、修改、核查后的版本，根据下面的步骤一步步来直接能够运行程序。本程序实现的功能是增删改查以及全选首先是程序提纲程序提纲主要部分是java文件和xml文件。 activity放在java文件里面，xml文件就是布局文件，用来规定界面的显示格式。类定义的Java文件文件类定义的 StudentDao StudnetDBHelper Student TableContanst 其他文件其他文件 string .xml color.xml styles.xml AndroidManifest.xml(自定义的活动需要手动添加到此文件中) 下面看看我的文件目录

值得注意的是，menu.xml不是放在layout目录下，而是放在menu目录下。然后依次介绍各个activity的代码主界面是StudentListActivity 主界面是代码如下 java文件：StudentListActivity package com.example.asus.student; import java.util.ArrayList; import java.util.Iterator;

import java.util.List; import android.app.AlertDialog; import android.app.ListActivity; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.util.Log; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.Button; import android.widget.CheckBox; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.SimpleCursorAdapter; import android.widget.Toast; import StudentDBHelper.StudentDBHelper; import Student.Student; //import AddStudentActivity; import TableContanst.TableContanst; public class StudentListActivity extends ListActivity implements OnClickListener, OnItemClickListener, OnItemLongClickListener { private static final String TAG = "TestSQLite"; private Button addStudent; private Cursor cursor; private SimpleCursorAdapter adapter; private ListView listView; private List list; private RelativeLayout relativeLayout; private Button searchButton; private Button selectButton; private Button deleteButton; private Button selectAllButton; private Button canleButton; private LinearLayout layout; private StudentDao dao; private Student student; private Boolean isDeleteList = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Log.e(TAG, "onCreate"); list = new ArrayList(); student = new Student(); dao = new StudentDao(new StudentDBHelper(this)); addStudent = (Button) findViewById(R.id.btn_add_student); searchButton = (Button) findViewById(R.id.bn_search_id); selectButton = (Button) findViewById(R.id.bn_select); deleteButton = (Button) findViewById(R.id.bn_delete); selectAllButton = (Button) findViewById(R.id.bn_selectall); canleButton = (Button) findViewById(R.id.bn_canel); layout = (LinearLayout) findViewById(R.id.showLiner); relativeLayout=(RelativeLayout) findViewById(R.id.RelativeLayout); listView = getListView(); // 为按键设置监听 addStudent.setOnClickListener(this); searchButton.setOnClickListener(this); selectButton.setOnClickListener(this); deleteButton.setOnClickListener(this); canleButton.setOnClickListener(this); selectAllButton.setOnClickListener(this); listView.setOnItemClickListener(this); listView.setOnItemLongClickListener(this); listView.setOnCreateContextMenuListener(this); } // 调用load()方法将数据库中的所有记录显示在当前页面

@Override protected void onStart() { super.onStart(); load(); } public void onClick(View v) { // 跳转到添加信息的界面 if (v == addStudent) { startActivity(new Intent(StudentListActivity.this, AddStudentActivity.class)); } else if (v == searchButton) { // 跳转到查询界面 startActivity(new Intent(this, StudentSearch.class)); } else if (v == selectButton) { // 跳转到选择界面 isDeleteList = !isDeleteList; if (isDeleteList) { checkOrClearAllCheckboxs(true); } else { showOrHiddenCheckBoxs(false); } } else if (v == deleteButton) { // 删除数据 if (list.size() > 0) { for (int i = 0; i < list.size(); i++) { long id = list.get(i); Log.e(TAG, "delete id=" + id); int count = dao.deleteStudentById(id); } dao.closeDB(); load(); } } else if (v == canleButton) { // 点击取消，回到初始界面 load(); layout.setVisibility(View.GONE); isDeleteList = !isDeleteList; } else if (v == selectAllButton) { // 全选，如果当前全选按钮显示是全选，则在点击后变为取消全选，如果当前为取消全选，则在点击后变为全选 selectAllMethods(); } } // 创建菜单 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { MenuInflater inflater = new MenuInflater(this); //getMenuInflater(); inflater.inflate(R.menu.menu, menu); } // 对菜单中的按钮添加响应时间 @Override public boolean onContextItemSelected(MenuItem item) { int item_id = item.getItemId(); student = (Student) listView.getTag(); Log.v(TAG, "TestSQLite++++student+" + listView.getTag() + ""); final long student_id = student.getId(); Intent intent = new Intent(); Log.v(TAG, "TestSQLite+++++++id"+student_id); switch (item_id) { /* 添加 case R.id.add: startActivity(new Intent(this, AddStudentActivity.class)); break;*/ // 删除 case R.id.delete: deleteStudentInformation(student_id); break; case R.id.look: // 查看学生信息 Log.v(TAG, "TestSQLite+++++++look"+student+""); intent.putExtra("student", student); intent.setClass(this, ShowStudentActivity.class); this.startActivity(intent); break; case R.id.write: // 修改学生信息 intent.putExtra("student", student); intent.setClass(this, AddStudentActivity.class); this.startActivity(intent); break; default: break;

} return super.onContextItemSelected(item); } @Override public boolean onItemLongClick(AdapterView parent, View view, int position, long id) { Student student = (Student) dao.getStudentFromView(view, id); listView.setTag(student); registerForContextMenu(listView); return false; } // 点击一条记录是触发的事件 @Override public void onItemClick(AdapterView parent, View view, int position, long id) { if (!isDeleteList) { student = dao.getStudentFromView(view, id); Log.e(TAG, "student*****" + dao.getStudentFromView(view, id)); Intent intent = new Intent(); intent.putExtra("student", student); intent.setClass(this, ShowStudentActivity.class); this.startActivity(intent); } else { CheckBox box = (CheckBox) view.findViewById(R.id.cb_box); box.setChecked(!box.isChecked()); list.add(id); deleteButton.setEnabled(box.isChecked()); } } // 自定义一个加载数据库中的全部记录到当前页面的无参方法 public void load() { StudentDBHelper studentDBHelper = new StudentDBHelper( StudentListActivity.this); SQLiteDatabase database = studentDBHelper.getWritableDatabase(); cursor = database.query(TableContanst.STUDENT_TABLE, null, null, null, null, null, TableContanst.StudentColumns.MODIFY_TIME + " desc"); startManagingCursor(cursor); adapter = new SimpleCursorAdapter(this, R.layout.student_list_item, cursor, new String[] { TableContanst.StudentColumns.ID, TableContanst.StudentColumns.NAME, TableContanst.StudentColumns.AGE, TableContanst.StudentColumns.SEX, TableContanst.StudentColumns.LIKES, TableContanst.StudentColumns.PHONE_NUMBER, TableContanst.StudentColumns.TRAIN_DATE }, new int[] { R.id.tv_stu_id, R.id.tv_stu_name, R.id.tv_stu_age, R.id.tv_stu_sex, R.id.tv_stu_likes, R.id.tv_stu_phone, R.id.tv_stu_traindate }); listView.setAdapter(adapter); } // 全选或者取消全选 private void checkOrClearAllCheckboxs(boolean b) { int childCount = listView.getChildCount(); Log.e(TAG, "list child size=" + childCount); for (int i = 0; i < childCount; i++) { View view = listView.getChildAt(i); if (view != null) { CheckBox box = (CheckBox) view.findViewById(R.id.cb_box); box.setChecked(!b); } } showOrHiddenCheckBoxs(true); } // 显示或者隐藏自定义菜单 private void showOrHiddenCheckBoxs(boolean b) { int childCount = listView.getChildCount(); Log.e(TAG, "list child size=" + childCount); for (int i = 0; i < childCount; i++) { View view = listView.getChildAt(i); if (view != null) { CheckBox box = (CheckBox) view.findViewById(R.id.cb_box); int visible = b ? View.VISIBLE : View.GONE; box.setVisibility(visible); layout.setVisibility(visible); deleteButton.setEnabled(false); } } }

// 自定义一个利用对话框形式进行数据的删除 private void deleteStudentInformation(final long delete_id) { // 利用对话框的形式删除数据 AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("学员信息删除") .setMessage("确定删除所选记录?") .setCancelable(false) .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { int raws = dao.deleteStudentById(delete_id); layout.setVisibility(View.GONE); isDeleteList = !isDeleteList; load(); if (raws > 0) { Toast.makeText(StudentListActivity.this, "删除成功!", Toast.LENGTH_LONG).show(); } else Toast.makeText(StudentListActivity.this, "删除失败!", Toast.LENGTH_LONG).show(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); AlertDialog alert = builder.create(); alert.show(); } // 点击全选事件时所触发的响应 private void selectAllMethods() { // 全选，如果当前全选按钮显示是全选，则在点击后变为取消全选，如果当前为取消全选，则在点击后变为全选 if (selectAllButton.getText().toString().equals("全选")) { int childCount = listView.getChildCount(); for (int i = 0; i < childCount; i++) { View view = listView.getChildAt(i); if (view != null) { CheckBox box = (CheckBox) view.findViewById(R.id.cb_box); box.setChecked(true); deleteButton.setEnabled(true); selectAllButton.setText("取消全选"); } } } else if (selectAllButton.getText().toString().equals("取消全选")) { checkOrClearAllCheckboxs(true); deleteButton.setEnabled(false); selectAllButton.setText("全选"); } } } 布局文件：main.xml和student_list_item.xml 代码如下 main.xml

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直接可用的Android studio学生信息管理系统.pdf

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