闹钟主要要用到的就是 AlarmManager 闹钟管理器。
1什么是闹钟管理器?
就是可以使用闹钟管理器触发事件,这些事件是可以在特定的时间和或者固定的间隔时间间隔发生。
2怎么来使用闹钟管理器来实现闹钟的?
首先我们要获得闹钟管理器,
确定设置闹钟的时刻,
创建要调用的接受程序,
创建一个挂起的 pendingIntent,它可传递闹钟管理器来调用接受程序。
最后使用刚创建的闹钟时间和 pendingIntent来设置闹钟。
需要注意的是周期闹钟与一次闹钟的方法不一样
一个是alarmManager.set()
一个是alarmManager.setRepeating()
跳activity小编用的是广播,当然也可以直接跳activity。
具体代码:
package com.zking.android28;
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;
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);
//获取闹钟管理者
alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
}
public void setAlarmOne(View view){
//获取系统当前时间
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) {
Calendar c=Calendar.getInstance();
//确定好选择的时间
c.set(Calendar.HOUR_OF_DAY,i);
//设置闹钟
c.set(Calendar.MINUTE,i1);
Intent intent=new Intent();
intent.setAction("com.zking.android28.RING");
pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0x101,intent,0);
alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(), pendingIntent);
}
},hour,minute,true);
timePickerDialog.show();
}
public void setAlarmCycle(View view){
//获取当前系统时间
Calendar calendar=Calendar.getInstance();
int hour=calendar.get(Calendar.HOUR_OF_DAY);
int minute=calendar.get(Calendar.MINUTE);
//01.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) {
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,i);
c.set(Calendar.MINUTE,i1);
//02.确定好选择的时间
//03.设置闹钟
//04.当之间一到,将执行的响应
Intent intent=new Intent();
intent.setAction("com.zking.android28.RING");
pendingIntent =
PendingIntent.getBroadcast(MainActivity.this,0x102,intent,0);
//周期闹钟 alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);
}
},hour,minute,true);
timePickerDialog.show();
}
public void cancelAlarmCycle(View view){
alarmManager.cancel(pendingIntent);
}
}
广播代码:
package com.zking.android28;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
/** * Created by Administrator on 2017/2/22. */
public class RingReservd extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
if("com.zking.android28.RING".equals(intent.getAction())){
Log.i("test","收到广播了");
//跳转到Activity
Intent intent1=new Intent(context,RingActivity.class);
//给Intent设置标志位Flag
intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//Intent的组成部分:ComponementName extra Action Data Categlay(分组) Flag
context.startActivity(intent1);
}
}
}
最后就是activtiy代码啦,通知就是写在这里呢。
在这里我们要用到的是NotificationManager,就是通知管理器。
package com.zking.android28;
import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.NotificationCompat;
import android.view.View;
/** * Created by Administrator on 2017/2/22. */
public class RingActivity extends AppCompatActivity{
private MediaPlayer mediaPlayer;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ring);
//播放音乐
mediaPlayer= MediaPlayer.create(this, R.raw.duo);
mediaPlayer.start();
//显示通知栏
NotificationCompat.Builder notificationCompat=new NotificationCompat.Builder(this);
//设置参数
notificationCompat.setDefaults(NotificationCompat.DEFAULT_ALL);
notificationCompat.setContentTitle("提醒");
notificationCompat.setContentText("一大波僵尸正在门口");
notificationCompat.setSmallIcon(android.R.drawable.ic_lock_idle_alarm);
Notification notification=notificationCompat.build();
//通知管理器
NotificationManager notificationManager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//发送通知
notificationManager.notify(0x101,notification);
}
public void close(View view){
mediaPlayer.stop();
finish();
}
}
最后上效果图,通知的效果图就不上了,因为手机无法截图: