Android 实现自定义闹钟

闹钟是手机中非常常用的应用，当然我们也可以实现它

在闹钟中分为一次闹钟和周期闹钟，顾名思义，一次闹钟就会响一次后就失效，周期闹钟就是隔一段时间后会再次响铃。

今天就给大家分享两种闹钟的基本代码：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android27_zhangkai_alarm_notification.MainActivity">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="设置闹钟(一次)"
android:onClick="setAlarmOnce"
></Button>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="设置闹钟(周期)"
android:onClick="setAlarmRepeat"
></Button>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="取消周期闹钟"
android:onClick="cancelAlarmRepeat"
></Button>

</LinearLayout>

MainActivity.Java

package com.example.android27_zhangkai_alarm_notification;

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 am;

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

//获取闹钟管理器
am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
}

public void setAlarmOnce(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);

//弹出时间对话框
TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,hourOfDay);
c.set(Calendar.MINUTE,minute);
//设置闹钟
PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,new Intent("com.example.android27_zhangkai_alarm_notification.RING"),0);
am.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
}
},hour,minute,true);
timePickerDialog.show();
}

public void setAlarmRepeat(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);

//1.弹出时间对话框
TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,hourOfDay);
c.set(Calendar.MINUTE,minute);
//2.获取到时间      hourOfDay       minute
//3.设置闹钟
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0x102, new Intent("com.zking.administrator.g160628_android29_alarm_notification.RING"), 0);
am.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);//设置五秒响一次
}
},hour,minute,true);
time
4000
PickerDialog.show();
}
public void cancelAlarmRepeat(View view){
am.cancel(pendingIntent);
}
}

因为设置闹钟的页面和闹钟响铃的页面为两个Activity，所以我在此运用了广播的技术，当闹钟时间到了，触发服务发送广播给响铃的页面，然后开始响铃。

服务页面：

package com.example.android27_zhangkai_alarm_notification;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

/**
* Created by Administrator on 2017/7/23 0023.
*/

public class RingReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if ("com.example.android27_zhangkai_alarm_notification.RING".equals(intent.getAction())){
Intent intent1=new Intent(context,RingActivity.class);
intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent1);
}
}
}
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响铃页面：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="懒PIG，该出窝了！！！"
android:textSize="40sp"
/>

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="停止"
android:onClick="stop"
/>

</LinearLayout>
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package com.example.android27_zhangkai_alarm_notification;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

/**
* Created by Administrator on 2017/7/23 0023.
*/

public class RingActivity extends AppCompatActivity {

private MediaPlayer mediaPlayer;

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

//设置播放响铃音乐
mediaPlayer = MediaPlayer.create(this, R.raw.c);
mediaPlayer.start();
}

public void stop(View view){
mediaPlayer.stop();
finish();
}
}

记得要在配置页面配置服务哟

<receiver android:name=".RingReceiver"
android:enabled="true"
android:exported="true"
>
<intent-filter>
<action android:name="com.example.android27_zhangkai_alarm_notification.RING"></action>
</intent-filter>
</receiver>