Realization of Simple Alarm Clock Function Based on Alarmmanager

In this paper, we share the specific code of Alarmmanager to realize simple alarm clock function for your reference. The specific contents are as follows

Code:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
 
  <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=" Start the alarm clock "
    android:id="@+id/button"
    android:onClick="startAlarmClick"
    android:layout_alignParentEnd="true"
    android:layout_alignParentStart="true" />
 
  <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=" Set the alarm clock "
    android:id="@+id/button2"
    android:layout_below="@+id/button"
    android:onClick="startSetAlarmClick"
    android:layout_alignParentStart="true"
    android:layout_alignParentEnd="true" />
 
</RelativeLayout>

MainActivity.java

package com.example.haige.alarmmanager;
 
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends Activity
{
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
  }
 
  /*
   Start the alarm clock 
   */
  public void startAlarmClick(View view)
  {
    // Get the alarm clock service of the system 
    AlarmManager am= (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    // Time to trigger alarm clock (milliseconds) 
    long triggerTime= System.currentTimeMillis()+3000;
    Intent intent=new Intent(this,Alarmctivity.class);
    PendingIntent op=PendingIntent.getActivity(this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
    // Start 1 The second time will only be executed 1 A second alarm clock 
    am.set(AlarmManager.RTC,triggerTime,op);
//    // Repeat the alarm clock at a specified time 
//    am.setRepeating(AlarmManager.RTC,triggerTime,2000,op);
  }
 
  /*
   Set the alarm clock 
   */
  public void startSetAlarmClick(View view)
  {
    // Get the alarm clock service of the system 
    AlarmManager am= (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    // Time to trigger alarm clock (milliseconds) 
    long triggerTime= System.currentTimeMillis()+3000;
    Intent intent=new Intent(this,AlarmReceiver.class);
    PendingIntent op=PendingIntent.getBroadcast(this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
    // Start 1 The second time will only be executed 1 A second alarm clock 
    am.set(AlarmManager.RTC,triggerTime,op);
//    // Repeat the alarm clock at a specified time 
//    am.setRepeating(AlarmManager.RTC,triggerTime,2000,op);
  }
}

activity_alarmctivity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context="com.example.haige.alarmmanager.Alarmctivity">
 
</RelativeLayout>

Alarmctivity.java

package com.example.haige.alarmmanager;
 
import android.app.Activity;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import java.io.IOException;
 
public class Alarmctivity extends Activity
{
  MediaPlayer mp;
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_alarmctivity);
    mp = new MediaPlayer();
    try {
      mp.setDataSource(this, Uri.parse("/storage/sdcard1/kugou/ Hearing / Nan Quan Mama - You're not like her .mp3"));
      mp.prepare();
    } catch (IOException e) {
      e.printStackTrace();
    }
    mp.setLooping(true);
    mp.start();
    alarmOialog();
  }
 
 
  @Override
  protected void onResume() {
    super.onResume();
  }
 
  @Override
  protected void onDestroy() {
    super.onDestroy();
    if(mp!=null)
    {
      if(mp.isPlaying())
      {
        mp.stop();
      }
      mp.release();
    }
  }
 
  public void alarmOialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage(" Big brother, big sister called you to get up! ");
    builder.setPositiveButton(" Come again 1 Times ", new DialogInterface.OnClickListener() {
 
      @Override
      public void onClick(DialogInterface dialogInterface, int i) {
        alarm();
        finish();
      }
    });
 
    builder.setNegativeButton(" Stop ", new DialogInterface.OnClickListener() {
 
      @Override
      public void onClick(DialogInterface dialogInterface, int i) {
        finish();// Close a window 
      }
    });
    builder.show();
  }
 
  private void alarm() {
    // Get the alarm clock service of the system 
    AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    // Time to trigger alarm clock (milliseconds) 
    long triggerTime = System.currentTimeMillis() + 5000;
    Intent intent = new Intent(this, Alarmctivity.class);
    PendingIntent op = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    // Start 1 The second time will only be executed 1 A second alarm clock 
    am.set(AlarmManager.RTC, triggerTime, op);
    // Repeat the alarm clock at a specified time 
//    am.setRepeating(AlarmManager.RTC,triggerTime,2000,op);
  }
 
}

Broadcast receiver AlarmReceiver. java

package com.example.haige.alarmmanager;
 
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
 
public class AlarmReceiver extends BroadcastReceiver {
  public AlarmReceiver() {
  }
 
  @Override
  public void onReceive(Context context, Intent intent) {
    Toast.makeText(context," Get up, get up! ",Toast.LENGTH_SHORT).show();
  }
}