Develop Reference

How to string to shared preference without an editText?

can I save strings to my sharedpreference without using an editText. Using an edit text this is the format of putting string to the shared preference right?
editor.putString("username", etUsername.getText().toString());
I want to happen is to get the users ID from the db for it to be saved on the sharedpreference.
editor.putString("userID", *******);
what should I put there? Thanks. I don't know how to do it.
And this is my db for the users.
myDB

editor.putString("userID", parameter);
yes, in second parameter you can save your sting whatever your want.

You're doing it right.
String stringValue = "BobSmith";
editor.putString("stringKey", stringValue);

This can be done like this:
String valueToBeSaved = etUsername.getText().toString();
editor.putString("userID", valueToBeSaved);
editor.apply();
DatabaseHelper myDatabaseHelper = new DatabaseHelper(Activity.this);
myDatabaseHelper.openDataBase();
String userId = myDatabaseHelper.getYourData(); //this is the method to query user UserId
myDatabaseHelper.close();
//now save userId in shared preferences
String valueToBeSaved = etUsername.getText().toString();
editor.putString("userID", userId);
editor.apply();
}
I hope youe are searching for this. If any doubts let me know.

Why previous customer details are showed in shared preference?

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
SharedPreferences.Editor editor = prefs.edit();
editor.putString("Orderinfo", responseStr);
Log.i("myprev",responseStr);//storing correct values
editor.commit();
I have used fragments,i stored Orderinfo,its stores the current values but in next fragment page i have to retrive my current customer data,but its shows previously stored customer details...can anyone help me to solve the problem?
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
String emailsts = prefs.getString("Orderinfo", "");
Log.i("myinfo",emailsts);//this shows prev customer details

SharedPreferences myPrefs =PreferenceManager.getDefaultSharedPreferences(getActivity());
myPrefs.edit().putString("Orderinfo", responseStr).apply();
String responseString= myPrefs.getString("Orderinfo", "");
if(!responseString.isEmpty()){
// Do you code
}

String emailsts = prefs.getString("Orderinfo", "");
here "emailsts" is getting null so you will get default value which is blank in above code .which means your value is not Store in SharedPreferences.
And Mau be your "responseStr" is null please put log there and print value.
Log.v(TAG ,"responseStr=="+responseStr);

How to avoid adding duplicate values in shared preferences in android?

In android, i am adding string values using shared preferences, but i want to compare the value which i am going to add to shared preferences with values which are already stored in shared preferences to avoid adding duplicate values, but i am not getting how to do this?
or is there any alternate method to avoid adding duplicate values in shared preferences?
I am adding string values using following code
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
Editor editor = sharedpreferences.edit();
editor.putString(Name, s);
editor.commit();

In android you cannot really have duplicate value in sharedPreference because every time you change or modify a value on sharedPreference it will replace the previous with the current. So since every instance of it has a single unique key, which mean it will always be unique (in my experience every time i messed up with this keys like giving the same name key for both an Int and boolean for example i end up crashing the app or having some kind of exception)
If im wrong i hope someone else will correct me and provide you with a better answer!

I don't know whether I'm understanding your question quite well or not, but Android's SharedPreferenceshas it's own contains to check if a a key already exists or not.
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
if (sharedpreferences.contains(NAME)) //It already contains NAME key
On the other hand, if your worries are about a single key's value not to be repeated, just read it before storing the new value and compare themselves, no more.
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
if (!sharedpreferences.getString(NAME, "").equals(s)) {
// It does not have the same value, store 's'
sharedpreferences
.edit();
.putString(NAME, s);
.commit();
}
However, in this particular case I wouldn't perform this verification, just overwrite the value and that's it, as it always gonna be the same.

First get String value from SharedPreferences as oldvalue then compare with newvalue which you want to store. If String not match then save newvalue in SharedPreferences.
Try something like this
String str_newvalue = "new string here";
SharedPreferences sharedpref = this.getSharedPreferences(this.getPackageName(), context.MODE_PRIVATE);
String str_oldvalue = sharedpref.getString("key", "");
if (!str_newvalue.equals(str_oldvalue)) {
sharedpref.edit().putString("key", str_newvalue).commit();
}

Do this
SharedPreferences prefs = getPreferences(MODE_PRIVATE);
String restoredText = prefs.getString("text", null);
if(restoredText.matches(your string))
{
// do nothing
}
else
{
//save your data
}
}

Get Strings from ArrayList and save in Shared Preferences

I have an ArrayList that can contain 1 to 15 strings. Those strings need to be saved in my shared preferences, now I know how to iterate trough the array to get the strings. What I don't know, is there a clean way to dynamically add the strings to my shared preferences file? I could do this on a sluggish way by creating 15 strings and using an if statement to fill the shared preference, but I would like to know if there is a better way.
Thank you.

If its about naming, you can use something like this:
public static final String mPrefix = "mArray";
SharedPreferences prefs;
prefs = this.getSharedPreferences("PREF", 0);
prefsEditor = appSharedPrefs.edit();
//mAL is your ArrayList
for(int i=0; i<mAl.size(); i++){
prefsEditor.putString(mPrefix + "-" + i, mAl.get(i));
}
prefsEditor.commit();

You can use the putStringSet method available in SharedPreferences.Editor to store string arrays. For example:
String[] array = new String[]{"this", "is", "a", "string", "array"};
SharedPreferences.Editor edit = sharedPrefs.edit();
edit.putStringSet("myKey", new HashSet<String>(Arrays.asList(array)));
edit.commit();
Or if your API is below 11 then you may convert your string array into a single string and save it just like an ordinary string. For example:
edit.putString("myKey", TextUtils.join(",", array));
and later use the following to rebuild your array from string:
array = TextUtils.split(sharedPrefs.getString("myKey", null), ",");

Mainly to edit the shared prefernces data you need to take the Editor Object from it so you could edit it freely so to put data in it:
SharedPrefernces preferences = mContext.getSharedPreferences(MODE_PRIVATE);
Editor prefEditor = preferences.edit();
prefEditor.putString("this is a key object","this is value of the key");
You can also put inside different kinds of object for example : boolean , int , float , double and etc....
Just look up the editor class in android developers website...
In order to read the data from the sharedPrefrences it is even more simplier
SharedPrefrences pref = mContext.getSharedPreferences(MODE_PRIVATE);
pref.getString("the key of the value");

Android shared preferences retrieve username and password

Im having trouble with retrieving username and password from android's sharedpreferences. I use this code to save the username and pass
SharedPreferences prefs=getSharedPreferences("File", 0);
SharedPreferences.Editor e= prefs.edit();
e.putString("Email", "example#example.com").putString("Password", "password1");
e.commit();
e.putString("Email", "example_2#example.com").putString("Password", "password2");
e.commit();
String s=prefs.getString("Email","not found");
But i dont know how to retrieve information for user to log in. Can anybody help me figure out

Create Share Preference:
SharedPreferences sp=getSharedPreferences("Login", 0);
SharedPreferences.Editor Ed=sp.edit();
Ed.putString("Unm",Value );
Ed.putString("Psw",Value);
Ed.commit();
Get Value from Share preference:
SharedPreferences sp1=this.getSharedPreferences("Login",null);
String unm=sp1.getString("Unm", null);
String pass = sp1.getString("Psw", null);

You need to give different keys for different values, otherwise the second email will erase the first one. See shared preferences as a persistent hashmap :
//keep constants, don't use their values. A constant has more meaning
SharedPreferences prefs=getSharedPreferences("File", MODE_PRIVATE );
SharedPreferences.Editor e= prefs.edit();
//keys should be constants as well, or derived from a constant prefix in a loop.
e.putString("Email1", "example#example.com").putString("Password1", "password1");
e.putString("Email2", "example_2#example.com").putString("Password2", "password2");
//commit once, not twice
e.commit();
//not found should be a constant in a xml resource file
String mail1=prefs.getString("Email1","not found");
String mail2=prefs.getString("Email2","not found");