Getting java.lang.String cannot be cast to java.lang.Integer when retrieving value from SharedPreferences

Question

I am trying to use SharedPreferences to store some values and retrieve them when the app opens, but I have issues with retrieving some int values.

I have tried converting the value to a string and then using Integer.ParseInt to retrieve the value, but I still get an error.

This is where my value should be stored:

void putP1Index(int index) {
    SharedPreferences.Editor mEditor = mPrefs.edit();
    mEditor.putInt(keyP1Index, index);
    mEditor.apply();
}

void putP2Index(int index) {
    SharedPreferences.Editor mEditor = mPrefs.edit();
    mEditor.putInt(keyP2Index, index);
    mEditor.apply();
}

They are saved from a different class:

private MainGame mainGame;
private SavedValues savedValues;


ScoreSetter(MainGame mainGame) {
    this.mainGame = mainGame;
    savedValues = new SavedValues(mainGame);
}

void setScore(who) {
switch (who) {
        case 1:
            ++indexP1;
            savedValues.putP1Index(indexP1);
//Some code...
        case 2:
            ++indexP2;
            savedValues.putP2Index(indexP2);
//Some code...
}
}

And I try to retrieve it like this:

int getP1Index() {
    return mPrefs.getInt(keyP1Index, 0);
}

int getP2Index() {
    return mPrefs.getInt(keyP2Index, 0);
}

by calling them from a different class:

void getSavedValues() {
    indexP1 = savedValues.getP1Index();
    indexP2 = savedValues.getP2Index();
}

On the getSavedValues method I get the error

java.lang.RuntimeException: Unable to start activity ComponentInfo{...}: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer

What I don't understand is the fact that I save the value as int and try to retrieve them the same way.

Also, I have a similar method but with booleans and it works just fine.

Answer 1

I managed to fix the issue. There was nothing wrong with the code, but with a value that was written in a previous version of the app.

After cleaning the app data and and Invalidate and clear cache in Android Studio the issue disappeared.