[안드로이드] 알람 예제

MainActivity.java

package com.example.myapplication;


import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Calendar;

import static android.app.AlarmManager.RTC_WAKEUP;

public class MainActivity extends AppCompatActivity {
    private static final String TAG = null;
    private TimePicker timePicker;
    private AlarmManager alarmManager;
    private int hour, minute;
    Context context;

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

        TextView textview = (TextView)findViewById(R.id.textview);

        final Intent intent = new Intent(this, Alarm.class);
        final AlarmManager alarmManager = (AlarmManager)this.getSystemService(ALARM_SERVICE);
        final PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

        hour = 17;
        minute = 59;
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, hour);
        calendar.set(Calendar.MINUTE, minute);

        // 지정한 시간에 매일 알림
        try {
            alarmManager.setRepeating(RTC_WAKEUP, calendar.getTimeInMillis(), 60 * 1000, pendingIntent);
            textview.setText("출근하세요 ~~~~~~!!");

        } catch (Exception e){
            textview.setText(e.toString());
        }

        // 알람 정지 버튼
        Button alarm_off = findViewById(R.id.btn1);
        alarm_off.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "Alarm 종료", Toast.LENGTH_SHORT).show();

                Intent intent = new Intent(MainActivity.this, Alarm.class);
                PendingIntent pIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
                alarmManager.cancel(pIntent);
            }
        });

    }
}

activity_main.xml

TextView와 Button 을 만들어준다.

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textview"
        android:textSize="30sp"
        android:layout_marginBottom="10dp"/>

    <Button
        android:id="@+id/btn1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="종료"
        android:onClick="button"
        app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

AndroidManiffest.xml

VIBRATE 퍼미션을 추가하고, Alarm.java를 추가한다.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapplication">

    <uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
    <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission android:name="android.permission.VIBLATE"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="알람"
        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>
        <receiver android:name=".Alarm"></receiver>
    </application>
</manifest>

Alarm.java

package com.example.myapplication;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioAttributes;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.widget.Toast;

public class Alarm extends BroadcastReceiver {
    Ringtone rt;

    @Override
    public void onReceive(Context context, Intent intent) {

        Toast.makeText(context, "출근하세요 ~~~~~~!!", Toast.LENGTH_SHORT).show();    // AVD 확인용

        Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
        Ringtone ringtone = RingtoneManager.getRingtone(context.getApplicationContext(), uri);
        AudioAttributes audioAttributes = new AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_ALARM).build();

        ringtone.setAudioAttributes(audioAttributes);
        ringtone.play();
    }
}