I use the following helper to save user input to sharedpreference:
protected void storeData(SharedPreferences.Editor editor,
String key, EditText et) {
String content = et.getText().toString();
if ("".equals(content)||" ".equals(content)) {
editor.remove(key);
} else {
editor.putString(key, content);
}
}
then
number1 = (EditText)findViewById(R.id.number1);
SharedPreferences sharedPreferences = getSharedPreferences("Database", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
storeData(editor,"number1", number1);
editor.commit();
I wish to ask if how can I retrieve that value as a integer, then use it for some calculation.
I been searching and found this , found that they use editor.putInt(key,content);
But is that possible to extract the value as integer straight from my method?
thank you.
Your storeData() method is setting a string (putString()). Shared prefs store typed values distinctly different. That is, you cannot put "1" as a string then get it our later as an integer.
You need to use put/getInt() consistently. Alternatively you could store it as a string, and again consistently get it as a string and coerce it to an int as you need.
Your really should be using putInt(), but you can also use Integer.parseInt("some string") to convert your String value to an integer.
Use editor.commit() inside the else part
A suggestion:
use editor.apply() instead of editor.commit() as commit handles the job in foreground whereas apply handles that asynchronously.
I know, the question has been asked long time agao. I came up with similar situation. So, the might help someone in the future.
//for integer values
port = (EditText) findViewById(R.id.devicePort);
int devicePort = Integer.parseInt(port.getText().toString());
editor.putInt(getString(R.string.devicePort), devicePort);
editor.apply();
Related
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.
In my app, the user can add a name and an age for multiple people. Most likely it will only be around 2 or 3. I want to store these in shared preferences. I set a counter to keep track of how many people have been stored as well as to manage which key goes with which value. I took the edittext input and put it in a string and then put it into the shared preferences like so, adding on the counter so I know that is the first person and would access the person with "name1".
//this is in the class
public int count = 1;
//this is in the main
SharedPreferences sharedPreferences = getSharedPreferences("registerData", Context.MODE_PRIVATE);
SharedPreferences.Editor myEditor = sharedPreferences.edit();
myEditor.putString("Name"+count, name);
myEditor.putString("Age"+count, age);
Unless I am mistaken, that should put the string "name" into "Name1".
Then I go and try to access it in another activity with...
SharedPreferences sharedPreferences = getSharedPreferences("registerData", Context.MODE_PRIVATE);
String name = sharedPreferences.getString("Name"+count,"");
String age = sharedPreferences.getString("Age"+count,"");
Then i would update the counter before the next person would be added to change the key to "Name2" "Age2", and so on.
Whenever I try to set the strings to a textview, they show up blank. Which means its not the same String to access the key. The putString has to get the "Name1", because even when I try to access the getString("Name",""), it's still blank. Is there something I'm doing wrong or missing. Or there is a better way of doing this? Thanks.
SharedPreferences sharedPreferences = getSharedPreferences("registerData",Context.MODE_PRIVATE);
SharedPreferences.Editor myEditor = sharedPreferences.edit();
myEditor.putString("Name"+count, name);
myEditor.putString("Age"+count, age);
myEditor.apply();//returns nothing,don't forgot to commit changes
also you can use
myEditor.commit() //returns true if the save works, false otherwise.
Is there something I'm doing wrong or missing. Or there is a better
way of doing this?
If SharedPreferences key names are dynamic then you should use SharedPreferences.getAll() which return all keys available in selected preference:
Map<String, ?> allKeys = sharedPreferences.getAll();
Now iterate through allKeys to check key names and get values from Map.Entry related to key like:
for (Map.Entry<String, ?> entry : allKeys.entrySet()) {
Log.v("TAG","Key Name :" entry.getKey());
Log.v("TAG","Key Value :" entry.getValue());
}
You have to call apply() on the shared preference editor after making changes.
...
myEditor.apply();
Shared preferences however, are not meant to store content related data. Consider using more appropriate solutions like a database.
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
}
}
I am storing userId at the time of registration in SharedPreferencesand. Now I want to access the SharedPreferences stored UserId value. Till now I tried this code:
prefrence = PreferenceManager.getDefaultSharedPreferences(this);
edit3 = prefrence.edit();
edit3.putInt("user_id", userid);
Log.e("Commit", "SharedPreferences");
edit3.commit();
And on the next activity I am using this for access:
prefr = PreferenceManager.getDefaultSharedPreferences(this);
value = prefr.getInt("user_id", "");
How do I do this?
You PUT in an INT and GET a STRING... Maybe that's causing a type cast error.
I see you changed your code, to get an int... the WRONG WAY!
You are doing so:
value = prefr.getInt("user_id", "");
Instead you should do so:
value = prefr.getInt("user_id", 0);
(You can't assign "" to an int.)
The above is valid if user_id is an int. If user_id is a string, then you should do a putString and a getString. Like:
edit3.putString("user_id", userid);
And then
value = prefr.getString("user_id", "");
So you grant the necessary type consistency.
Try changing
prefr.getString("user_id", "");
to
prefr.getInt("user_id", 0);
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");