AlarmManager实现闹钟

分手后的思念是犯贱 2022-06-12 13:07 155阅读 0赞

今天给大家介绍一下闹钟的实现，先看概念图：

![Center][]

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)

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>

[Center]: /images/20220612/a732b1fef70c461284232c055db47bd7.png