使用SharedPreferences保存一个字符串值，但是由于某种原因，它没有被保存或由于其他问题

Question

I'm trying to save marker with Latlng and two strings with SharedPreferences and i'm doing a for loop to retrieve it when the activity is lunched again i had another question before because i couldn't delete the marker from the SharedPreferences So my mind is so missed up i can't figure it out what is the issue now please check the code below and any suggestions that could help i appreciated

I'm Using the et String so i match it to Marker title and on Marker Click i delete the Marker from sharedPreferences according to its title and already initilized the SharedPreferences in onCreated Method like so SharedPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());

So I save the values like this,

int Int,cycler,IncreaseAmount;
String testSample;
private static final String StringLat= "Latitude",StringLng="Longitude",StringDis="Dis",StringName="Name";

String SinputNames = inputName.getText().toString();
Sinputdiscription = inputdiscription.getText().toString();


dLatitude = AddedLatLng.latitude;
dLongitude = AddedLatLng.longitude;
SharedPreferences.Editor editor = SharedPrefs.edit();

IncreaseAmount++;
editor.putInt("IJSS",IncreaseAmount);
IncreaseAmount = SharedPrefs.getInt("IJSS",0);
//SJSS = SinputNames;
//SJSS = Double.toString(dLatitude);

editor.putString("ErrorTest","Pulling up the info is working");
editor.putLong(SJSS+StringLat,Double.doubleToLongBits(dLatitude));
editor.putLong(SJSS+StringLng,Double.doubleToLongBits(dLongitude));
editor.putString(SJSS+StringName,SinputNames);
editor.putString(SJSS+StringDis,Sinputdiscription);
// editor.putString("lat"+ Integer.toString((IntCoords)), Double.toString(point.latitude));
editor.putString("ForLooper"+Integer.toString((IncreaseAmount)),SinputNames);
editor.apply();

and then pull it off from sharedPreferences

String CheckErrortest = SharedPrefs.getString("ErrorTest","Not working!");

Log.i("AlertSinput:",CheckErrortest);
cycler = SharedPrefs.getInt("IJSS",0);
if(cycler !=0) {
    String Name="";
    double Lat321,Lng321;
//     Log.i("ifCycler","if Cycler != 0 is working");
    Int = SharedPrefs.getInt("IJSS",0) +1;
    for(int i=0; i< Int ; i++ ) {
        Log.i("ForLoop:","The for loop is also working");
        // editor.putString("ForLooper"+Integer.toString((IncreaseAmount)),SJSS+StringLat);

        //Here i can't pull up the info
        String iCheck = SharedPrefs.getString("Forlooper"+Integer.toString((Int)),"");
        Log.i("TheMarkerName:","Should be"+iCheck);
        Name = SharedPrefs.getString(iCheck+StringName,"Marker");
        Lat321 = Double.longBitsToDouble(SharedPrefs.getLong(iCheck+StringLat,0));
        Lng321 = Double.longBitsToDouble(SharedPrefs.getLong(iCheck+StringLng,0));
        Log.i("Markertitle:#",Name);
        Log.i("TestTheInteger:#",Integer.toString((Int)));

        if(Lat321 !=0) {
            AddedLatLng = new LatLng(Lat321,Lng321);
            drawMarker(AddedLatLng,Name);
        }
    }
}

So the CheckErrortest and Log.i("ForLoop:","The for loop is also working"); are working Just fine but the String String iCheck = SharedPrefs.getString("Forlooper"+Integer.toString((Int)),""); Is not working when i pull up the info for some reason and i couldn't figure out what is the issue anything that could help is appreciated thank you very much

Answer 1

I don't see you're commiting your changes . You need to do

editor.apply();

or

editor.commit();

All changes you make in an editor are batched, and not copied back to the original SharedPreferences until you call commit() or apply()

Answer 2

You need to apply your changes after work with editor.

editor.commit();

or

editor.apply();