how to get id of broadcastreceiver in android

Question

I want to get the id of broadcastriver.

Is there any way to find the id of the broadcastreciver?? I am making an alarm application and on saving the alarm, I send a broadcast using pending intent. Now if a user edit the alarm, I want to abort that specif broadcast and send a new broadcast of the new time?

How can I do this????

I am using this code for broadcast

Intent intent = new Intent(this, StartProfileBroadcastReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(
                this.getApplicationContext(), 234324243, intent, 0);

        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, StartTimemill, pendingIntent);

and in manifest, I register my Broadcastreciver using this code

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

Answer 1

you can find the project on my github by this project you can et lots of alarm and can catch cancaled alarms.

Alarm class is needed to hold to get specific data

Alarm.java

public class Alarm {
    public int getState() {
        return state;
    }

    public void setState(int state) {
        this.state = state;
    }

    public int getUniqueID() {
        return uniqueID;
    }

    public void setUniqueID(int uniqueID) {
        this.uniqueID = uniqueID;
    }

    private int state;
    private int uniqueID;

}

AlarmHolder is singleton and holds the alarm in an arraylist

AlarmHolder.java

import java.util.ArrayList;

public class AlarmHolder{
      private static AlarmHolder uniqueAlarmHolder;   
      private ArrayList<Alarm> lAlarms;

      private AlarmHolder() {         
          lAlarms = new ArrayList<Alarm>();
      }

      public  synchronized static AlarmHolder getInstance()     
      {
          if (uniqueAlarmHolder == null) {
              uniqueAlarmHolder = new AlarmHolder();
            }
            return uniqueAlarmHolder;
      }   

      public void registerAlarm(int id) {
          Alarm a = new Alarm();
          a.setState(1);
          a.setUniqueID(id);

          lAlarms.add(a);
        }

      public void removeAlarm(int id,Alarm a) {
          Alarm newAlarm = new Alarm();
          a.setState(0);
          a.setUniqueID(id);

          lAlarms.remove(id);
          lAlarms.add(newAlarm);          
        }

      public void replaceList(ArrayList<Alarm> newList) {
          lAlarms.clear();
           lAlarms.addAll(newList);       
        }

      public ArrayList<Alarm> getAlarms() {
            return lAlarms;
        }

      public Alarm lastAlarmId() {
            return lAlarms.get(lAlarms.size()-1);
        }
  }  

MyBroadcastReceiver.java

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Vibrator;
import android.util.Log;
import android.widget.Toast;

public class MyBroadcastReceiver extends BroadcastReceiver {
    AlarmHolder objAlarmHolder = AlarmHolder.getInstance();

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

            // with this key we can catch the alarm which we want
        int key = intent.getIntExtra("key",0);


        for (Alarm alarm : objAlarmHolder.getAlarms()) {
            // if alarmstate is 1 and the key belogs that alarm device will vibrate
            if (alarm.getState() == 1 & alarm.getUniqueID() == key ) {
                Log.v("alarm", String.valueOf(String.valueOf(alarm.getUniqueID())));
                Toast.makeText(context, "your alarm id : " + String.valueOf(alarm.getUniqueID()),Toast.LENGTH_LONG).show();
                Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
                vibrator.vibrate(2000);
            } else {
                Log.v("alarm", "canceled alarm number : " + String.valueOf(alarm.getUniqueID()));
            }

        }

    }

}

MainActivity.java

import java.util.ArrayList;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    EditText text;
    int uniqueInteger = 1;
    AlarmHolder objAlarmHolder = AlarmHolder.getInstance();
    ArrayList<Alarm> tempAlarmHolder = new ArrayList<Alarm>();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        text = (EditText) findViewById(R.id.editText1);

        Button btn = (Button) findViewById(R.id.button1);

        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                            // we should pass unique integer to method 
                startAlert(uniqueInteger);
                uniqueInteger++;
            }
        });
    }

    public void startAlert(int rnd) {
        int i = Integer.parseInt(text.getText().toString());
        Bundle bundle = new Bundle();
        bundle.putInt("key", uniqueInteger);

        objAlarmHolder.registerAlarm(uniqueInteger);

        int alarmCount = 0;
        tempAlarmHolder.clear();


            // in this loop, all old alarms' state will set as 0
        for (Alarm alarm : objAlarmHolder.getAlarms()) {

            if(alarmCount < objAlarmHolder.getAlarms().size()-1)
            {
                Alarm objAlarm = new Alarm();
                objAlarm.setState(0);
                objAlarm.setUniqueID(alarmCount);               
                tempAlarmHolder.add(objAlarm);              
            }
            else
            {
                tempAlarmHolder.add(alarm);             
            }           
            alarmCount++;
        }

        objAlarmHolder.replaceList(tempAlarmHolder);




        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
                + (i * 1000), getPendingIntent(bundle, uniqueInteger));
        Toast.makeText(this, "Alarm set in " + i + " seconds",
                Toast.LENGTH_LONG).show();
    }

    private PendingIntent getPendingIntent(Bundle bundle, int rc) {
        Intent intent = new Intent(MainActivity.this, MyBroadcastReceiver.class);

            // send alarm id to broatcast
        intent.putExtras(bundle);
        return PendingIntent.getBroadcast(this, rc, intent,
                PendingIntent.FLAG_UPDATE_CURRENT);
    }
}

Manifest.xml

 <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />
   <uses-permission android:name="android.permission.VIBRATE" ></uses-permission>
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <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>

activity_main.xml

<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" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="65dp"
        android:ems="10" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editText1"
        android:layout_centerHorizontal="true"
        android:text="Button" />

</RelativeLayout>

Answer 2

You can either:

1. Keep a reference to the PendingIntent object you register with the AlarmManager, and call PendingIntent.cancel to cancel it when you're registering a new alarm.
2. Use the flag FLAG_CANCEL_CURRENT when creating your PendingIntent.

Using both methods, the old alarm will be deleted when creating the new one..