Add CS

CS

@@ -0,0 +1,119 @@
+package edu.hzuapps.diary;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.ContentValues;
+import android.content.Intent;
+import android.database.sqlite.SQLiteDatabase;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.DatePicker;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import java.util.Calendar;
+
+public class cunchuActivity extends AppCompatActivity {
+
+    private Button fanhuibt,qdbt,qcbt;//返回按钮，确定按钮，清除按钮
+    private DatePicker datePicker;//时间计时器
+    private int year,month,day;
+    private DBOpenHelper dbOpenHelper;//声明数据库
+    private EditText editText;//输入框
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_cunchu);
+
+        qcbt = findViewById(R.id.qc);
+        fanhuibt = findViewById(R.id.fanhui3);
+        datePicker = findViewById(R.id.datepicker);
+        qdbt = findViewById(R.id.queding2);
+        editText = findViewById(R.id.edtext);//输入框
+        dbOpenHelper = new DBOpenHelper(cunchuActivity.this,"db_date",null,2);//创建找到数据库
+        SQLiteDatabase db = dbOpenHelper.getWritableDatabase();//创建数据库对象
+
+        //返回上一个页面
+        fanhuibt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(cunchuActivity.this, jiluActivity.class);
+                startActivity(intent);
+            }
+        });
+
+        //初始化一个日历对象
+        Calendar calendar = Calendar.getInstance();
+        year = calendar.get(Calendar.YEAR);
+        month = calendar.get(Calendar.MONTH);
+        day = calendar.get(Calendar.DAY_OF_MONTH);
+
+
+        ///////////////////////时间计时器操作
+        datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() {
+            @Override
+            public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
+                cunchuActivity.this.year = year;
+                cunchuActivity.this.month = monthOfYear;
+                cunchuActivity.this.year = dayOfMonth;
+
+//****
+//添加内容在这
+//****
+                //点确定按钮会做的事情：
+                qdbt.setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        String str = year+"年"+(monthOfYear+1)+"月"+dayOfMonth+"日";
+                        //Toast.makeText(cunchuActivity.this,str,Toast.LENGTH_LONG).show();
+                        if (!(editText.getText().toString().equals(""))){
+                            insertData(db,year,(monthOfYear+1),dayOfMonth,editText.getText().toString()); //插入数据库
+                            Toast.makeText(cunchuActivity.this,"添加成功",Toast.LENGTH_SHORT).show();
+                        }else {
+                            Toast.makeText(cunchuActivity.this,"请输入事件内容",Toast.LENGTH_SHORT).show();
+                        }
+
+
+
+                    }
+                });
+
+            }
+        });
+        ////////////////////////////////////////////////////////
+//***
+//***
+//删除在这！！
+//***
+//***
+        qcbt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                db.delete("tb_date",null,null);
+                Toast.makeText(cunchuActivity.this,"清除成功",Toast.LENGTH_LONG).show();
+            }
+        });
+
+
+
+
+
+    }
+
+//***
+//***
+//修改在这！！
+//***
+//***
+    private void insertData(SQLiteDatabase sqLiteDatabase , int yearin, int monthin, int dayin, String neirongin){
+        ContentValues values = new ContentValues();
+        values.put("year",yearin);
+        values.put("month",monthin);
+        values.put("day",dayin);
+        values.put("neirong",neirongin);
+        sqLiteDatabase.insert("tb_date",null,values);
+    }
+}