Android Java Shared Preferences push notification once

Question

I have this inside myMainActivity:

public void sendNotificationIfTimeEnd01() {
    Intent intent01 = new Intent(Intent.ACTION_VIEW,
            Uri.parse("https://www.google.de/?gws_rd=ssl"));
    PendingIntent pendingIntent01 = PendingIntent.getActivity(this, 1, intent01, 0);
    NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
    builder.setSmallIcon(R.drawable.ic_stat_notification);
    builder.setContentIntent(pendingIntent01);
    builder.setAutoCancel(true);
    builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));
    builder.setContentTitle(gamesJuliToStringArray[0]);
    builder.setContentText("Ready");
    builder.setSubText("click for google");
    NotificationManager notificationManager = (NotificationManager) getSystemService(
            NOTIFICATION_SERVICE);
    notificationManager.notify(NOTIFICATION_ID_01, builder.build());
    try {
        Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
        r.play();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

I call it inside my fragment like this:

if (diffDays <= 0) {
    String diffDaysAvailable = "ready";
    ((TextView) android.findViewById(R.id.readyLeft)).setText(diffDaysAvailable);
    ((TextView) 
    activity.sendNotificationIfTimeEnd01();
    Log.d("MyApp", "notification 1");
}

I basically get a sample notification if diffDays <= 0. That works so far.

The problem is that the notification always pops up, when I restart the app.

I googled and read that one should use shared preferences to solve this issue. (Not experienced with it). I have this so far:

        final SharedPreferences sharedPreferences = getActivity().getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
        final SharedPreferences.Editor editor = sharedPreferences.edit();

        // push notification once time is up
        final String notification01 = sharedPreferences.getString("notification01", "not01");

But have no idea how to continue and solve this issue.

We can use `SharedPreferences` for storing data. You can use `puXxxx()` to store and `getXxxx()` to retrieve from it. Its not that complicated.. — Emil, Aug 22 '15 at 18:01
possible duplicate of [How to use SharedPreferences in Android to store, fetch and edit values](http://stackoverflow.com/questions/3624280/how-to-use-sharedpreferences-in-android-to-store-fetch-and-edit-values) — Emil, Aug 22 '15 at 18:31

Hussein El Feky · Accepted Answer · 2015-08-22T18:08:55.730

2

Do something like this:

if (diffDays <= 0) {
    final SharedPreferences sharedPreferences = getActivity().getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
    final boolean notification01 = sharedPreferences.getBoolean("notification01", false);

    if (!notification01) {
        String diffDaysAvailable = "ready";
        ((TextView) android.findViewById(R.id.readyLeft)).setText(diffDaysAvailable);
        activity.sendNotificationIfTimeEnd01();
        Log.d("MyApp", "notification 1");
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putBoolean("notification01", true);
        editor.apply();
    }
}

Before sending any notification, this will check if the boolean is false or not. If it is false, then send the notification and set that boolean true, else nothing.

edited Aug 22 '15 at 18:08

answered Aug 22 '15 at 18:04

Hussein El Feky

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@KevinBrown I have explained. – Hussein El Feky Aug 22 '15 at 18:09
Glad that helped. Do you mean you want to save the value of diffDaysAvailable instead of saving a boolean? – Hussein El Feky Aug 22 '15 at 18:27
I mean I want to set the text of the button to ready like you wrote String diffDaysAvailable = "ready"; ((TextView) android.findViewById(R.id.readyLeft)).setText(diffDaysAvailable); but somehow this is now blank I guess its something if the condition – Max Brian Aug 22 '15 at 18:29
I got it was my fault – Max Brian Aug 22 '15 at 18:31

Emil · Answer 2 · 2015-08-22T18:21:09.997

This line initializes your SharedPreference with the name you provided and which will remain Private to your app

SharedPreferences sharedPreferences = getActivity().getSharedPreferences("YOUR_PREFERENCE_NAME", Context.MODE_PRIVATE);

Call this method when you want a boolean data is stored in preference which is associated with a key (a string literal).

public void setValue() {
 SharedPreferences.Editor editor = sharedPreferences.edit();
 editor.putBoolean("your_key", true);
 editor.commit();
}

With this method you can check if you have already put a true value in your preference with a key.

public boolean isValueExists() {
 boolean value = sharedPreferences.getBoolean("your_key", false);
 return value;
}

Android Java Shared Preferences push notification once

2 Answers2