29.Android-闹钟-通知（定时操作）

最新推荐文章于 2022-05-25 13:22:54 发布

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#Android #闹钟 #通知 #定时操作

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本文介绍了如何在Android中实现闹钟和通知功能，包括一次性闹钟和周期性闹钟的详细代码实现，展示了设置成功后的一次性闹钟及周期性闹钟效果图。

一.知识概要

二.具体代码实现如下:

布局文件

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"
    android:orientation="vertical"
    >

    <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

<?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"
    android:orientation="vertical"
    >
    <!--播放音乐的界面-->

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="小懒猪，该起床了！！！"
        android:textSize="40sp"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="关闭闹钟"
        android:onClick="stop"
        /><!--可以写手势，一滑就关闭-->

</LinearLayout>

Java代码

MainActivity.java

package com.zking.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.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.NotificationCompat;
import android.view.View;
import android.widget.TimePicker;

import java.util.Calendar;

/**
 * 设置闹钟
 *
 * 闹钟一响就跳广播，广播又跳了Activity
 */
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);

    }

    //一次性闹钟
    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：当前系统时间
                       c.set(Calendar.HOUR_OF_DAY,hourOfDay);//把小时设为你选择的小时
                       c.set(Calendar.MINUTE,minute);
                       //2.获取到时间      hourOfDay       minute  （选择的时钟和分钟）
                       //3.设置一次性闹钟
                       PendingIntent pendingIntent= PendingIntent.getBroadcast(MainActivity.this,0x101,new Intent("com.zking.android29_alarm_notification.RING"),0);//上下文 请求码  启动哪一个广播 标志位
                       am.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);//RTC_WAKEUP:唤醒屏幕  getTimeInMillis():拿到这个时间点的毫秒值 pendingIntent:发送广播
               }
           },hour,minute,true);//上下文，监听，默认的时分秒
           timePickerDialog.show();//弹出对话框
    }


    //周期闹钟
    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.getBroadcast(MainActivity.this,0x102,new Intent("com.zking.android29_alarm_notification.RING"),0);
                    am.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);//5秒响一次
                }
            },hour,minute,true);
            timePickerDialog.show();
    }

    //取消周期闹钟
    public void cancelAlarmRepeat(View view){
        am.cancel(pendingIntent);
    }


    //发送通知
    public void send(View view){
            //实例化通知
            NotificationCompat.Builder builder=new NotificationCompat.Builder(this);//v7.app.AppCompatActivity:什么继承了v7所以导v7  Builder:构造器
            builder.setContentTitle("提示");//通知的标题
            builder.setContentText("您中奖啦！请先汇款到XXX账号激活中奖码");//通知的内容
            builder.setSmallIcon(android.R.drawable.star_on);//图标
            builder.setDefaults(NotificationCompat.DEFAULT_ALL);//使用默认的震动、默认的铃声等
            builder.setAutoCancel(true);//点完通知信息就消失
            Notification notification=builder.build();//通知
            //发送通知
            notificationManager.notify(0x101,notification);//id  通知

//          builder.setContentIntent() //点击通知信息跳转
//          builder.setCustomContentView() //设置通知栏自定义样式
    }





}

RingReceiver.java

package com.zking.android29_alarm_notification;

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

/**
 * 响铃广播接收者
 * 广播调Activity
 */

public class RingReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
           //广播的名字:包名+随便取一个名字
           if("com.zking.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);//需要把启动的新的Activity放到一个新的任务栈里面才能启动
                 context.startActivity(intent2);
           }
    }
}

RingActivity.java

package com.zking.android29_alarm_notification;

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

/**
 * 响铃
 *一进来就播放音乐
 */
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.music);
        mediaPlayer.start();//一进来就播放
    }

    public void stop(View view){//停止的方法
        mediaPlayer.stop();
        finish();//把自己的界面干掉
    }

}

清单文件AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.zking.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>
        <!--注册静态广播-->
        <receiver android:name=".RingReceiver"
            android:enabled="true"
            android:exported="true"
            >
            <intent-filter>
                <action android:name="com.zking.android29_alarm_notification.RING"></action>
            </intent-filter>
        </receiver>

    </application>

</manifest>

一次性闹钟效果图