Load sharedpreferences not giving me a value - java

Here is my code.
SharedPreferences sharedPreferences = getSharedPreferences(values,
MODE_PRIVATE);
str1 = sharedPreferences.getString("lu121", "test");
str2 = sharedPreferences.getString("lp5151", "test");
et_username.setText(str1);
et_pass.setText(str2);
by default str1 and str2 should have values of test but when i open the android application the edittexts are not set as test instead i see a blank. Is there something wrong with my code?

You need to call commit() to save the values (you didn't include any code where you are writing.
...
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("lu", "testlu");
editor.putString("lp", "testlp");
editor.commit();

Related

SharedPreferences editor not executing

In the following piece of code, one of the mEditor lines, doesn't appear to execute.
I've tried many different combinations so far, but can't get it to execute properly. The value is not set at all.
If i try to use the value, like in a Toast, I will receive a ResourcesNotFound Exception
Initialization of SharedPreference in my onCreateView, Fragment
mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
mEditor = mSharedPreferences.edit();
public void onClick(View view) {
int round_number = mSharedPreferences.getInt(getString(R.string.pref_round_played),0);
if (round_number == 0){
game_team.setBackgroundResource(R.drawable.t);
game_team.setVisibility(View.VISIBLE);
knap_bund.setVisibility(View.INVISIBLE);
knap_top.setText("Next Strat");
mEditor.putString(getString(R.string.pref_chosen_team), "T");
mEditor.putInt(getString(R.string.pref_round_played),round_number + 1);
mEditor.apply();
//Show CT side Pistol round here//
}
Following code is used in my onClick, which has other sharedPreferences, working the exact same way, which executes fine.
The first line executes just fine, but the second line containing 'putInt' isn't executing as intended.
mEditor.putString(getString(R.string.pref_chosen_team), "T");
mEditor.putInt(getString(R.string.pref_round_played), 1);
mEditor.apply();
Example of working code:
else if(round_number <= 30){
mEditor.putInt(getString(R.string.pref_round_played),round_number + 1);
mEditor.apply();
}
UPDATE
Just to clarify due to the comments. It's only this one occasion where the sharedPreferences won't work. I use it about 15 other places in this fragment, with no issues at all
I will receive a ResourcesNotFound Exception
I think R.string.pref_round_played is not exist,check it for your strings.xml
you're not posted for your detailed code so do it like this below to save values in shared preference
public static final String PREFS_NAME = "MyPrefsFile";
SharedPreferences.Editor editor = getSharedPreferences(PREFS_NAME , MODE_PRIVATE).edit();
editor.putString("name", "john");
editor.putInt("id", 123);
editor.apply();
Retrieve the data from shared preference
SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
String name = prefs.getString("name", ""); // you can put default value if you need
int idName = prefs.getInt("id", 0);
if this is not works for you please post your full code
Update
change your code to this one
mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
SharedPreferences.Editor mEditor = mSharedPreferences .edit();

Passing variables through many activities

on MainActivity I have two edit texts which I get name and age values
now I have in this activity for example name="Mohamed" age=26
my questions is how to use these variables freely in other activities without passing them through Intent
Use the Shared Preferences.
Set the values:
SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
editor.putString("name", name);
editor.putInt("age", age);
editor.commit();
Retrieve values:
SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
String restoredName = prefs.getString("name", null); //null is the default value.
int age = prefs.getInt("age", 0); //0 is the default value.
For more information visit Android Doc Shared Preferences

Saving a String value with SharedPreferences but for some reason it is not getting saved or due to other issue

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
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()
You need to apply your changes after work with editor.
editor.commit();
or
editor.apply();

Preferences always returns default value

This code I use to create value in SharedPreference.
SharedPreferences sharedpreferences;
sharedpreferences = getSharedPreferences("user", Context.MODE_PRIVATE);
Editor editor = sharedpreferences.edit();
editor.putInt("ans1",1).commit();
Here is the code to get value from SharedPreference.
SharedPreferences sharedpreferences=getApplicationContext().getSharedPreferences("user", Activity.MODE_PRIVATE);
int ans = sharedpreferences.getInt("ans1",7);
Value of ans always is 7.

problem While Sharing text in Android using SharedPreferences

I am Following this link to use the SharedPreferences.Am trying to Apply in my Application but The Shared value returns the null value
Here my code To assign the Shared Variable
SharedPreferences sharedPreferences = getSharedPreferences("pref",Activity.MODE_WORLD_READABLE);
SharedPreferences.Editor editor= sharedPreferences.edit();
String l="hello";
editor.putString(l,"imagepath");
editor.commit();
here code to access the Shared variable
SharedPreferences myPrefs = this.getSharedPreferences("myPrefs", MODE_WORLD_READABLE);
String prefName = myPrefs.getString("imagepath",null);
Toast.makeText(getBaseContext(),"create banner"+prefName,Toast.LENGTH_LONG).show();
here prefName returns null value.It Cannot Shared.
The preference name is "hello", not "imagepath".
String prefName = myPrefs.getString("hello", null);
And I think it's better to use getString("hello", ""). This way, prefName will never be null.
You have written "myPrefs" in (SharedPreferences myPrefs = this.getSharedPreferences("myPrefs", MODE_WORLD_READABLE);)
Change it like this (SharedPreferences myPrefs = this.getSharedPreferences("pref", MODE_WORLD_READABLE);)
here i have change "myPrefs" in ("myPrefs", MODE_WORLD_READABLE) to "pref" .
Now you the coorect one be ("pref", MODE_WORLD_READABLE)
you are using wrong key.
get string like this:
String prefName = myPrefs.getString("hello",null);
you are also using two different sharedPreference name:
SharedPreferences sharedPreferences = getSharedPreferences("pref",Activity.MODE_WORLD_READABLE);
SharedPreferences myPrefs = this.getSharedPreferences("myPrefs", MODE_WORLD_READABLE);
Please make sure you write and read in same SharedPreference.
Your code to write in SharedPreference should look like this:
SharedPreferences sharedPreferences = getSharedPreferences("pref",0);
SharedPreferences.Editor edito r= sharedPreferences.edit();
String l="hello";
editor.putString(l,"imagepath");
editor.commit();
To read from SharedPreference should look like this:
SharedPreferences myPrefs = this.getSharedPreferences("pref", 0);
String prefName = myPrefs.getString("hello",null);
Toast.makeText(getBaseContext(),"create banner"+prefName,Toast.LENGTH_LONG).show();
Switch this around:
editor.putString("imagepath", l);
also you will want to change the possible return value of "null" to a more acceptable error return value, maybe 0 or -1.
String prefName = myPrefs.getString("imagepath","0");
Source Android Doc for Editor:
abstract SharedPreferences.Editor putString(String key, String value)
//Set a String value in the preferences editor, to be written back once commit() or apply() are called.

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