SharedPreference - How to toast only once when Activity recieves the data

Question

how can i toast only once when my Activity 2 receive's data / value from my Activity 1 ? , I am trying to unlock a button when he receive the same value from the other activity. Below is my code

SharedPreferences sharedPreferences = getSharedPreferences("UnlockPreTestFour", Context.MODE_PRIVATE);
             final int scorePre = sharedPreferences.getInt("ScoreFour", 0);
               if(scorePre !=0){
            Toast.makeText(grade_four.this, "Button Unlock!", Toast.LENGTH_SHORT).show();
                      }

in my code after the Activity 2 receives the same value from Activity 1, it always toast because it already has a value , can someone help me, thanks

Answer 1

Boolean hasReceivedData = false

SharedPreferences sharedPreferences = getSharedPreferences("UnlockPreTestFour", Context.MODE_PRIVATE);
         final int scorePre = sharedPreferences.getInt("ScoreFour", 0);

           //check to see if you have received the data
           if(scorePre !=0 && hasReceivedDate == false){
                Toast.makeText(grade_four.this, "Button Unlock!", Toast.LENGTH_SHORT).show();

                //set variable to ensure data is only loaded once
                hasReceivedData = true;
             }

Here is a simple and kind of hacky answer. Your hasReceivedData variable will have to be passed onConfigurationChanged. I hope this helps!