AlarmManager实现闹钟

今天给大家介绍一下闹钟的实现，先看概念图：

其中氛围两种基础的，一为一次性闹钟，响一次就停止；二为周期闹钟，可以由自己设置周期时间，重复响铃，以下为代码：

xml部分：

activity_main.xml(设置闹钟的界面)

<?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:orientation="vertical"    android:layout_height="match_parent">    <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>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="发送通知"        android:onClick="send"        /></LinearLayout>

activity_ring.xml(闹钟响铃的界面)

<?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: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>

java部分：

MainActivity.java:

package com.zking.administrator.g160628_android29_alarm_notification;import android.app.AlarmManager;import android.app.Notification;import android.app.NotificationManager;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.support.v7.app.NotificationCompat;import android.view.View;import android.widget.TimePicker;import java.util.Calendar;public class MainActivity extends AppCompatActivity {    private AlarmManager am;    private PendingIntent pendingIntent;    private NotificationManager notificationManager;    @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);        //获取通知管理器        notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_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);         //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,0x101,new Intent("com.zking.administrator.g160628_android29_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.获取时间                 //3.设置闹钟                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);            }        },hour,minute,true);        timePickerDialog.show();    }    public void cancelAlarmRepeat(View view){          am.cancel(pendingIntent);    }    public void send(View view){         //实例化通知        NotificationCompat.Builder builder=new NotificationCompat.Builder(this);        builder.setContentTitle("提示");        builder.setContentText("中奖啦！请先汇款到XXX账号激活");        builder.setSmallIcon(android.R.drawable.star_on);        builder.setDefaults(NotificationCompat.DEFAULT_ALL);        builder.setAutoCancel(true);//      builder.setContentIntent()//        builder.setCustomContentView()        Notification notification=builder.build();        //发送通知        notificationManager.notify(0x101,notification);    }}

RingActivity.java

package com.zking.administrator.g160628_android29_alarm_notification;import android.media.MediaPlayer;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;public class RingActivity extends AppCompatActivity {    private MediaPlayer mediaPlayer;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_ring);        mediaPlayer = MediaPlayer.create(this, R.raw.c);        mediaPlayer.start();    }    public void stop(View view){        mediaPlayer.stop();        finish();    }}

RingReceiver.java:

package com.zking.administrator.g160628_android29_alarm_notification;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;/** * Created by Administrator on 2017/7/23 0023. */public class RingReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        if("com.zking.administrator.g160628_android29_alarm_notification.RING".equals(intent.getAction())){            Log.i("test","闹钟响了！！！");            //跳转到Activity中            Intent intent2=new Intent(context,RingActivity.class);            intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            context.startActivity(intent2);        }    }}

最后，不要忘记设置权限：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.zking.administrator.g160628_android29_alarm_notification">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".RingActivity"></activity>        <receiver android:name=".RingReceiver"            android:enabled="true"            android:exported="true"            >            <intent-filter>                <action android:name="com.zking.administrator.g160628_android29_alarm_notification.RING"></action>            </intent-filter>        </receiver>    </application></manifest>