效果图如下:
//开发手机闹钟主要用到了AlarmManager类,提供了访问系统定时服务的途径,当AlarmManager定时时间到了之后,Intent对象将会被系统广播,进而启动目标程序,进入通知类调用通知
package com.example.android28_inform;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TimePicker;
import java.util.Calendar;
/**
* 闹钟
*/
public class MainActivity extends AppCompatActivity {
private AlarmManager alarmManager;
private PendingIntent pendingIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//实例化闹钟管理
alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
}
//设置闹钟
public void one(View view){
//获取当前系统的时间
Calendar calendar= Calendar.getInstance();
int hour=calendar.get(Calendar.HOUR_OF_DAY);
int minute=calendar.get(Calendar.MINUTE);
//弹出时间对话框
TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int i, int i1) {
//确定选择好的时间
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,i);
c.set(Calendar.MINUTE,i1);
//时间一到,执行相对应的操作
Intent intent=new Intent();
intent.setAction(<