Android - on click notification save string in Shared Preferences

Question

I'm still not very good in Android dev, and I'm trying to figure out how can I do trigger some action (in my case I want to save a variable in shared preferences) after I click a Notification in Android.

I currently have this code:

private void startForegroundService() {
        Log.d(TAG, "Start " + NOTIFICATION_CHANNEL_NAME + " foreground service");
        setNotificationLanguage();
        Intent notificationIntent = new Intent(this, MainActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
        builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                .setSmallIcon(getResourceIdForResourceName(this, "ic_stat_show_chart"))
                .setSound(null)
                .setContentTitle(NOTIFICATION_CHANNEL_NAME)
                .setContentText(NOTIFICATION_CHANNEL_DESC)
                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                .setContentIntent(pendingIntent);
        Notification notification = builder.build();
}

When I click the notification I launch my MainActivity class, which is something that I also want. But I would also like to save a string in Shared Preferences in the notification is clicked. I already searched and found nothing. If someone could help I would appreciate it. Thank you :)

Try to work it in the way I coded. You can accept my answer if it's working @Johny . Thank you. — Brahma Datta, May 31 '21 at 14:23

score 1 · Answer 1 · answered May 31 '21 at 13:46

1

Try doing below in your Main Activty:

Intent intent = getIntent();
if (intent.hasExtras()){
   //Saved notification has been clicked to shared preferences
}

Hope this might help

answered May 31 '21 at 13:46

keshav kowshik

2,354
4
22
45

score 1 · Answer 2 · answered May 31 '21 at 13:47

1

You can pass arguments to intent, and in MainActivity check is intent have arguments Passing arguments to intent android

answered May 31 '21 at 13:47

Konrad Sikora

11
1
3

score 1 · Answer 3 · answered May 31 '21 at 14:07

Add String value which you want to save your sharedpref as extra in your notificationIntent, something like below.

notificationIntent.putExtra("Key","Value");

You will be able to extract it in your onCreate of your Activity.

 String value = getIntent().getStringArrayExtra("Key");

Note: If you just want to know if the activity is opened by notification, just pass any constant value in intent and check if you get that in the onCreate using the above approach, that way you are sure that the activity is launched by notification. Just make sure in that condition not to use the same key/value combination as extras for the same activity intent from launching it from anywhere else other than notification pendingIntent flow.

Brahma Datta · Accepted Answer · 2021-05-31T14:42:14.493

As Keshav explained, You can get the data from the intent and store it in the sharedpreferences, Here is SharedPreferenceHelper class.

public class SharedPreferenceHelper {

 private static final String STRING_NAME = "your_string_name";

 public SharedPreferenceHelper(Context context) {
    mPreferences = PreferenceManager.getDefaultSharedPreferences(context);
  }

 public void setString(String your_string){
    mPreferences.edit().putString(STRING_NAME,your_string).apply();
}

public String getString(){
    return mPreferences.getString(STRING_NAME,null);
}

}

In the MainActivity,

public class MainActivity extends AppCompatActivity{

 Bundle mBundle;
 SharedPreferenceHelper mSharedPreferenceHelper;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mSharedPreferenceHelper = new SharedPreferenceHelper(this);
    mBundle = getIntent().getExtras();

    if(mBundle != null){
     mSharedPreferenceHelper.setString(mBundle.getString("your_string_data"));
     }

}

If activity is already created then,

@Override
protected void onResume() {
    super.onResume();
  if(mBundle != null){
     mSharedPreferenceHelper.setString(mBundle.getString("your_string_data"));
     }
}

enter code here

Let me Know if you have any issues.

What if the MainActivity is already created? Should I do it also in onResume(), for example? — Johny Boy, May 31 '21 at 14:30
Yeah but check if the bundle is null before you put the preference value @JohnyBoy — Brahma Datta, May 31 '21 at 14:33
Ok update your answer if you can, so I accept it. I think this is important. Thank you for you help. — Johny Boy, May 31 '21 at 14:35

score 1 · Answer 5 · answered May 31 '21 at 14:22

1

Override method onNewIntent in your MainActivity

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    SharedPreferences.Editor editor = prefs.edit();
    editor.putString("KEY", "str value"); //change this according to your need
    editor.apply();
}

answered May 31 '21 at 14:22

Intra

46
1
4

You are completely right. Its better to use onNewIntent, since the onCreate method only triggers if the MainActivity is not already running. Thank you very much!! – Johny Boy May 31 '21 at 15:54

Android - on click notification save string in Shared Preferences

5 Answers5