diff --git a/schedule.java b/schedule.java
new file mode 100644
index 0000000..ec1007c
--- /dev/null
+++ b/schedule.java
@@ -0,0 +1,254 @@
+package edu.hzuapps.androidlabs;
+
+
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.annotation.SuppressLint;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.graphics.Canvas;
+import android.os.Bundle;
+import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.RadioGroup;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.util.Timer;
+import java.util.TimerTask;
+
+public class schedule extends AppCompatActivity {
+    private Button informationbutton;
+    private Button buttonadd;
+    private Button buttondelete;
+    MyHelper myHelper;
+    SQLiteDatabase db;
+    Intent intent;
+    Context context =this;
+    String temp;
+    TextView textView;
+    Cursor cursor;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_schedule);
+        informationbutton=findViewById(R.id.information);
+        buttonadd=findViewById(R.id.add);
+        buttondelete=findViewById(R.id.delete);
+        myHelper=new MyHelper(this);
+        db=myHelper.getWritableDatabase();
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"1","1"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Monday1);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"1","2"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Monday2);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"1","3"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Monday3);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"1","4"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Monday4);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"2","1"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Tuesday1);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"2","2"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Tuesday2);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"2","4"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Tuesday3);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"2","4"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Tuesday4);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"2","1"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Wednesday1);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"3","2"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Wednesday2);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"3","3"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Wednesday3);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"3","4"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Wednesday4);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"4","1"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Thursday1);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"4","2"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Thursday2);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"4","3"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Thursday3);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"4","4"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Thursday4);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"5","1"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Friday1);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"5","2"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Friday2);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"5","3"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Friday3);
+        textView.setText(temp);
+        cursor=db.query("courses", null, "weekdayname=? and id=?", new String[]{"5","4"}, null, null, null);
+        cursor.moveToFirst();
+        temp = cursor.getString(2);
+        textView=findViewById(R.id.Friday4);
+        textView.setText(temp);
+        buttonadd.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                @SuppressLint("ResourceType") AlertDialog dialog = new AlertDialog.Builder(context, R.layout.dailog).create();
+                    dialog.setCanceledOnTouchOutside(true);
+                    dialog.show();
+                    dialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
+                    //窗口的屏幕的位置
+
+                    Window win = dialog.getWindow();
+                    win.setContentView(R.layout.dailog);
+                    win.setLayout(RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT);
+                    //窗口的屏幕的位置
+
+                    EditText editText1 = (EditText) win.findViewById(R.id.weekdayname);
+                    EditText editText2 = (EditText) win.findViewById(R.id.id);
+                    EditText editText3 = (EditText) win.findViewById(R.id.coursename);
+                    //窗口文本组件
+
+
+                    //窗口的  取消按钮  及监视器
+                    Button button1 = (Button) win.findViewById(R.id.returnback);
+                    button1.setOnClickListener(v1 -> dialog.cancel());
+
+
+                    //窗口的  确定按钮  及监视器
+                    Button button2 = (Button) win.findViewById(R.id.sure);
+                    button2.setOnClickListener(new View.OnClickListener() {
+                        @Override
+                        public void onClick(View v) {
+                            String number;
+                            TextView textView;
+                            String weekdayname=editText1.getText().toString();
+                            String id=editText2.getText().toString();
+                            String coursename=editText3.getText().toString();
+                            if (weekdayname==""){
+                                Toast.makeText(schedule.this,"请输入时间",Toast.LENGTH_SHORT).show();
+                            }
+                            db=myHelper.getWritableDatabase();
+                            ContentValues values=new ContentValues();
+                            values.put("coursename",coursename);
+                            db.update("courses",values,"weekdayname=? and id=?",new String[]{weekdayname,id});
+                            Toast.makeText(schedule.this,"课程已添加",Toast.LENGTH_SHORT).show();
+                        }
+                    });
+            }
+        });
+        buttondelete.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                @SuppressLint("ResourceType") AlertDialog dialog = new AlertDialog.Builder(context, R.layout.deletedailog).create();
+                dialog.setCanceledOnTouchOutside(true);
+                dialog.show();
+                dialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
+                //窗口的屏幕的位置
+
+                Window win = dialog.getWindow();
+                win.setContentView(R.layout.deletedailog);
+                win.setLayout(RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT);
+                //窗口的屏幕的位置
+
+                EditText editText1 = (EditText) win.findViewById(R.id.weekdayname1);
+                EditText editText2 = (EditText) win.findViewById(R.id.id1);
+                //窗口文本组件
+
+
+                //窗口的  取消按钮  及监视器
+                Button button1 = (Button) win.findViewById(R.id.returnback);
+                button1.setOnClickListener(v1 -> dialog.cancel());
+
+
+                //窗口的  确定按钮  及监视器
+                Button button2 = (Button) win.findViewById(R.id.sure);
+                button2.setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        String number;
+                        TextView textView;
+                        String weekdayname=editText1.getText().toString();
+                        String id=editText2.getText().toString();
+                        db=myHelper.getWritableDatabase();
+                        ContentValues values=new ContentValues();
+                        values.put("coursename", (byte[]) null);
+                        db.update("courses",values,"weekdayname=? and id=?",new String[]{weekdayname,id});
+                        Toast.makeText(schedule.this,"课程已删除",Toast.LENGTH_SHORT).show();
+                    }
+                });
+
+
+            }
+
+        });
+
+        informationbutton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                intent=new Intent(schedule.this,information.class);
+                startActivity(intent);
+            }
+        });
+
+    }
+
+
+}
\ No newline at end of file