Contoh Android AlarmManager

Android AlarmManager memungkinkan Anda untuk mengakses alarm sistem.
Dengan bantuan Android AlarmManager di android, Anda dapat menjadwalkan aplikasi Anda untuk berjalan pada waktu tertentu di masa depan. Ia bekerja apakah telepon Anda berjalan atau tidak.

Android AlarmManager memegang kunci bangun CPU yang memberikan jaminan untuk tidak tidur telepon sampai siaran ditangani.

Contoh Android AlarmManager

Mari kita lihat contoh AlarmManager sederhana yang berjalan setelah waktu tertentu yang disediakan oleh pengguna.

* Main Activity

Anda hanya perlu menyeret editText dan tombol seperti yang diberikan di bawah ini.

File : activity_main.xml

<?xml version="1.0" encoding="utf-8"?>  
<RelativeLayout 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="example.android.com.alarmmanager.MainActivity">  
 
    <Button  
        android:id="@+id/button"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="Start"  
        android:layout_alignParentBottom="true"  
        android:layout_centerHorizontal="true"  
        android:layout_marginBottom="103dp" />  
 
    <EditText  
        android:id="@+id/time"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentTop="true"  
        android:layout_centerHorizontal="true"  
        android:layout_marginTop="22dp"  
        android:ems="10" />  
</RelativeLayout>  

* Activity class

Kelas aktivitas memulai layanan alarm ketika pengguna mengklik tombol.

File : MainActivity.java

package example.android.com.alarmmanager;  
 
import android.app.AlarmManager;  
import android.app.PendingIntent;  
import android.content.Intent;  
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.Toast;  
 
public class MainActivity extends AppCompatActivity {  
    Button start;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
        start= findViewById(R.id.button);  
 
        start.setOnClickListener(new View.OnClickListener() {  
            @Override  
            public void onClick(View view) {  
                startAlert();  
            }  
        });  
    }  
 
    public void startAlert(){  
        EditText text = findViewById(R.id.time);  
        int i = Integer.parseInt(text.getText().toString());  
        Intent intent = new Intent(this, MyBroadcastReceiver.class);  
        PendingIntent pendingIntent = PendingIntent.getBroadcast(  
                this.getApplicationContext(), 234324243, intent, 0);  
        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);  
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()  
                + (i * 1000), pendingIntent);  
        Toast.makeText(this, "Alarm set in " + i + " seconds",Toast.LENGTH_LONG).show();  
    }  
}  

Mari buat kelas BroadcastReceiver yang memulai alarm.

File : MyBroadcastReceiver.java

package example.android.com.alarmmanager;  
 
import android.content.BroadcastReceiver;  
import android.content.Context;  
import android.content.Intent;  
import android.media.MediaPlayer;  
import android.widget.Toast;  
 
public class MyBroadcastReceiver extends BroadcastReceiver {  
    MediaPlayer mp;  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        mp=MediaPlayer.create(context, R.raw.alarm);  
        mp.start();  
        Toast.makeText(context, "Alarm....", Toast.LENGTH_LONG).show();  
    }  
}  

* AndroidManifest

Anda perlu memberikan entri penerima dalam file AndroidManifest.xml.

File : AndroidManifest.xml

<receiver android:name="MyBroadcastReceiver" >  
</receiver>  

Mari kita lihat kode lengkap file AndroidManifest.xml.

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

Output :

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