how to use android broadcast receiver

Question

Here below is an example of service, activity and broadcast receiver. An activity is a setting that make changes to a service. The broadcast receiver listens to changes in settings and update service. learner2learner

public class xService extends Service {

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    public static void setEnableNotification(int command) {
        Log.i("EnableNotification","Updated");
        if (command == 0)
            enableNotification = true;
        ...
    }
}

The method below is a part of an activity that sends broadcast:

@Override
protected void onCreate(Bundle savedInstanceState) {
    ....
    IntentFilter filter = new IntentFilter();
        filter.addAction(NotifyServiceReceiver.ACTION);       
    registerReceiver(receiver,filter);
}   
final String ACTION="broadcast_settings";
public void onClick(View view) {
    Intent intent = new Intent(ACTION);

    switch (view.getId()) {
    case R.id.switchNotification:
        if(switchNotification.isChecked()==true)
        {       
            intent.putExtra("EnableNotification", 0);
            Log.i("Security365","Notification is enabled.");
        }
        else if ....
        sendBroadcast(intent);
        break;
    }

The part below is my broadcast receiver:

public class xReceiver extends BroadcastReceiver {

    final String ACTION="broadcast_settings";

    @Override
    public void onReceive(Context context, Intent intent) {
        if(intent.getAction().equals(ACTION)){

            int enableNotification = intent.getIntExtra("EnableNotification", 0);

            if (enableNotification == 0)
                Serurity365Service.setEnableNotification(0);
        ...
        }
    }
}

Mainfest

    <receiver android:name=".xReceiver" android:enabled="true"></receiver>

Answer 1

you are sending broadcast in a wrong way. You should send it as below:

    public void onClick(View view) {
        Intent intent = new Intent("your_action");

        switch (view.getId()) {
        case R.id.switchNotification:
            if(switchNotification.isChecked()==true)
            {       
                intent.putExtra("EnableNotification", 1);
                Log.i("Security365","Notification is enabled.");
            }
            else if ....
            sendBroadcast(intent);
            break;
        }
}

and receive it as:

 public class xReceiver extends BroadcastReceiver {

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

     if(intent.getACtion().equals("your_action"){
        int enableNotification = intent
                .getIntExtra("EnableNotification", 1);

        if (enableNotification == 0)
            Serurity365Service.setEnableNotification(0);
        ...
   }
} 
}

update you Androidmanifest.xml too:

<receiver android:name=".xReceiver" android:enabled="true">
 <intent-filter>
   <action android:name="your_action" />
 </intent-filter>
</receiver>

Answer 2

If I understand your code correctly, the block

 if(switchNotification.isChecked()==true)
    {       
        intent.putExtra("EnableNotification", 1);
        Log.i("Security365","Notification is enabled.");
    }

is setting the EnableNotification to 1 in the intent used from sendBroadcast

In your broadcast receiver, you have

 int enableNotification = intent
            .getIntExtra("EnableNotification", 1);

    if (enableNotification == 0)
        Serurity365Service.setEnableNotification(0);

So it says to retrieve the extra EnableNotification and if no value, return the default value of 1 and then you never enter your if (enableNotification == 0) statement.

To be sure your broadcast receiver works correctly, add a log statement at the beginning of your receiver in the onReceive method.

EDIT:

Also the AndroidMANIFEST.xml has a tag <manifest> that declares a package.

For example

<manifest package="com.hello.world" ...

When you declare the receiver in the manifest, the . like in .xReceiver means that xReceiver.java should be located in the package com.hello.world.

If you have in a different package, specify the full name or relatiive to the package declared in <manifest

More info here