android日程提醒完整的java.class代码和布局文件

以下是一个用于创建日程提醒的简单Android应用程序的完整Java类和布局文件示例。

布局文件schedule_reminder.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/title_edittext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:hint="提醒标题" />

    <EditText
        android:id="@+id/desc_edittext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/title_edittext"
        android:layout_margin="16dp"
        android:hint="提醒描述" />

    <TextView
        android:id="@+id/time_textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/desc_edittext"
        android:layout_margin="16dp"
        android:text="选择提醒时间" />

    <Button
        android:id="@+id/select_time_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/time_textview"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="16dp"
        android:text="选择时间" />

    <Button
        android:id="@+id/add_reminder_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/select_time_button"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="16dp"
        android:text="添加提醒" />

</RelativeLayout>

Java类ScheduleReminderActivity.java:

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
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.TimePicker;
import android.widget.Toast;

import java.util.Calendar;

public class ScheduleReminderActivity extends AppCompatActivity {

    private EditText titleEditText, descEditText;
    private TextView timeTextView;
    private Button selectTimeButton, addReminderButton;

    private int hour, minute;

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

        titleEditText = findViewById(R.id.title_edittext);
        descEditText = findViewById(R.id.desc_edittext);
        timeTextView = findViewById(R.id.time_textview);
        selectTimeButton = findViewById(R.id.select_time_button);
        addReminderButton = findViewById(R.id.add_reminder_button);

        selectTimeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showTimePicker();
            }
        });

        addReminderButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                addReminder();
            }
        });
    }

    private void showTimePicker() {
        final Calendar calendar = Calendar.getInstance();
        hour = calendar.get(Calendar.HOUR_OF_DAY);
        minute = calendar.get(Calendar.MINUTE);

        TimePickerDialog timePickerDialog = new TimePickerDialog(ScheduleReminderActivity.this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
                hour = selectedHour;
                minute = selectedMinute;

                timeTextView.setText(String.format("%02d:%02d", hour, minute));
            }
        }, hour, minute, true);

        timePickerDialog.show();
    }

    private void addReminder() {
        String title = titleEditText.getText().toString();
        String desc = descEditText.getText().toString();

        if (title.isEmpty() || desc.isEmpty()) {
            Toast.makeText(this, "请填写提醒标题和描述", Toast.LENGTH_SHORT).show();
            return;
        }

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, hour);
        calendar.set(Calendar.MINUTE, minute);
        calendar.set(Calendar.SECOND, 0);

        Intent intent = new Intent(ScheduleReminderActivity.this, ReminderReceiver.class);
        intent.putExtra("title", title);
        intent.putExtra("desc", desc);

        PendingIntent pendingIntent = PendingIntent.getBroadcast(ScheduleReminderActivity.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);

        Toast.makeText(this, "提醒已设置", Toast.LENGTH_SHORT).show();
    }
}

该应用程序包含一个布局文件和一个Java类。布局文件包含一些文本框和按钮，用于输入提醒标题、描述和时间，并添加提醒。Java类包含与布局文件中的控件交互的代码，并使用AlarmManager和BroadcastReceiver来触发提醒。请注意，还需要创建一个ReminderReceiver类，以便在提醒触发时通知用户。