How to call a non-activity method on Notification Click

Question

I have a java class MyClass which contains a method called callMethod. I want to call this method when user clicks on the notification

Below is the code i used to generate the notification

public class MainActivity extends AppCompatActivity {

    Button button;
    NotificationManager mNotifyMgr;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button);
        mNotifyMgr = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, new Intent(MainActivity.this, MyClass.class), PendingIntent.FLAG_UPDATE_CURRENT);
                Notification notification =
                    new NotificationCompat.Builder(MainActivity.this)
                            .setContentTitle("Notification")
                            .setSmallIcon(R.drawable.ic_launcher)
                            .setContentText("Downloaded")
                            .setContentIntent(pendingIntent)
                            .build();

                mNotifyMgr.notify(1,notification);
            }
        });
    }
}

And below is the implementation of MyClass

public class MyClass {
    public void callMethod(){
        System.out.println("Notification clicked");
    }
}

Please help, I am stuck into this for a while now

try MyClass.callMethod() it will work, you can have an Util class to handle some generic cases like this — Babajide Apata, Oct 12 '16 at 11:05
looking at this line PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, new Intent(MainActivity.this, MyClass.class), PendingIntent.FLAG_UPDATE_CURRENT);what it does is to call my class, so inside this class, you can call your method, immediately the class starts — Babajide Apata, Oct 12 '16 at 11:12

score 11 · Accepted Answer · answered Oct 13 '16 at 07:40

11

You could do something like this:

When creating your PendingIntent to put in the Notification:

Intent notificationIntent = new Intent(MainActivity.this, MyClass.class);
notificationIntent.putExtra("fromNotification", true);
PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, notificationIntent,
         PendingIntent.FLAG_UPDATE_CURRENT);

Now, in MyClass.onCreate():

if (getIntent().hasExtra("fromNotification")) {
    callMethod();
}

answered Oct 13 '16 at 07:40

David Wasser

93,459
16
209
274

MyClass is not an activity class, there is no onCreate() method in MyClass – Ezio Oct 13 '16 at 08:12
Well, then, you can't do this: `PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, new Intent(MainActivity.this, MyClass.class), PendingIntent.FLAG_UPDATE_CURRENT); ` that you posted in your code! – David Wasser Oct 13 '16 at 13:04
2

A click on a `Notification` triggers an `Intent`. That's it. You need something to receive that `Intent` and perform the action you want to be done. Only Android components (`Activity`, `Service` or `BroadcastReceiver`) can receive an `Intent`. So it looks like you will need to write an `Activity`, `Service` or `BroadcastReceiver` that will receive the `Intent` and then call `MyClass.callMethod()`. – David Wasser Oct 13 '16 at 13:07

score 2 · Answer 2 · answered Oct 12 '16 at 11:00

2

 @Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    //notification callbacks here in activity
    //Call method here from non activity class.
    Classname.methodName();
}

answered Oct 12 '16 at 11:00

Ankit Kumar

3,663
2
26
38

How to call a non-activity method on Notification Click

2 Answers2

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