I have a school planer app and I want to save the classes that are written in an EditText object. The problem is, the EditTexts are empty when I close the app and then open it again, and even when I press back. This may be a noob question, but I'm a beginner and I need help. Please answer quickly...
for saving edittext text you need to store the text into storage.
android support storage like
Database
Shared Preferences
For your problem you need to store your Edittext text into the storage when you change value.
And when you open it again you need to retrieve from the storage.
For you best option will be shared preferences. For more Go with This Example . This will make you understand save and retrieve shared preferences.
Short Example
Store Data
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
editor = pref.edit();
editor.putString("first_edittext", "value");
editor.commit();
Retrieve Data
SharedPreferences pref = PreferenceManager
.getDefaultSharedPreferences(getBaseContext());
pref.getString("first_edittext", "");
Related
I am using Android Studio and programming in Kotlin. I haven't been able to find a way to save the data entered by the user so it appears when they reopen the app. Thank you ahead of time!
You have to store your data in shared preference when any click event listen or on edittext textwatcher you can set your character in preference but best way is on any click event save data on preference and when activity open set data from preference on edittext.
Store it in Shared Preferences
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 - for private mode
use this save the value..
Editor editor = sharedpreferences.edit();
editor.putString("key_name", "value"); //here give name and value to save
editor.commit();
use this to get the value.
String edittextvalue = pref.getString("key_name", null); //put edittextvalue where ever you what to show the value.
use this step to remove or clear the value
editor.remove("name");
editor.commit();
I'm trying to develop a simple notepad on android. But I don't know how to save my notes(strings) to internal storage(or to an SQL database if it's faster). if I used internal storage would I be able to save a couple of strings and get them back? I'm a beginner to mobile application development and this is my first project. so I'd really appreciate it if you could show me a sample code so I can learn from it. Thanks!
A database is an option, therefore you'll definitively have to read the follow page, that helped me a lot. There is also some sample code in it.
http://www.vogella.com/articles/AndroidSQLite/article.html
In paragraph 9.7 is the full code for adding, editing and deleting records...
An other option is saving the string in an .txt file and save that on the storage. Than this might bring you further:
Write a file in external storage in Android
Good luck!
You can save it in shared preference if it is not too big.
To store:
SharedPreferences sharedPref = getSharedPreferences("SomeName", Context.MODE_PRIVATE);
Editor editor = sharedPref.edit();
editor.putString("String1", value); // value is the string you want to save
editor.commit()
To retrieve:
SharedPreferences sharedPref = getSharedPreferences("SomeName", Context.MODE_PRIVATE);
String retrievedString = sharedPref.getString("String1", defaultValue);
"SomeName" ---- the preference name
"String1" ---- key for the string you want to store/retrieve
defaultValue ---- in case the key is not available, this is the retrieved string
I am attempting to save a user id using SharedPreferences. Do values saved as SharePreferences persist across all Activities in my application so I can access the userid from any application? Below is my code for saving the userid.
userid = result.substring(3, result.length());
Log.d("userid at onpostexecute", userid);
SharedPreferences.Editor editor = getPreferences(MODE_PRIVATE).edit(); // to update userid
editor.putString("userid", userid);
editor.commit();
And here is the code for accessing the userid from the SharedPreferences in another activity.
SharedPreferences prefs = getPreferences(MODE_PRIVATE); // to access userid
String userid = prefs.getString("userid", "");
Log.d("shared prefs userid", userid);
What is strange is that the above code is in my onCreate method but it doesn't show up in the Logcat even though other log data is displayed before and after this code. So is there something wrong with my code that I can't even get it to display in my logcat? I can't even tell if it is being updated.
Values saved as sharedPreferences can be shared between activities if you tell it to. Right now you are creating a preference that is only accessible to that same activity. You need to use:
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor editor = preferences.edit();
Like this you are creating a sharedPreference between your application. There is a lot of explanation on the topic in the accepted answer to another question. Link to question
As discussed in the answer the way you are using to save the preference will only work in the same activity that saved it.
I assume you mean can you access them from any Activity, yes, they do persist even when you leave your app and come back. From the Docs
The SharedPreferences class provides a general framework that allows you to save and retrieve persistent key-value pairs of primitive data types. You can use SharedPreferences to save any primitive data: booleans, floats, ints, longs, and strings. This data will persist across user sessions (even if your application is killed).
If this Log.d("userid at onpostexecute", userid); doesn't even show up then I would put a breakpoint there and make sure you have a value for userid. I would also check your logcat filters to make sure that you are getting all logs. Just make sure that the type in the spinner is set to "verbose" just to be sure
I'd like my app to allow a single user to create a profile that is accessed every time they run the app. The user's profile contains a String entry and five int entries. I've thought about using an SQLite database to store the info between sessions, but it seems like overkill since I'd only need one row in a single table to store the data. However, I'm not sure if it's possible to use SharedPreferences on a String type of data.
Can anyone provide some insight into this issue please? Thank you!
Yes you can use SharedPreferences.
To write
Editor editor = getSharedPreferences("file_name", MODE_PRIVATE).edit();
editor.clear();
editor.putString("pref_name", myStringValue);
editor.commit();
To read back
SharedPreferences preferences = getSharedPreferences("file_name", MODE_PRIVATE);
String myStringValue = preferences.getString("pref_name", "default_value");
Regards.
I am newbie to Mobile development, I am using http://motech.applicationcraft.com/ to get some app going. I read about App Data Storage and wanted to use it to save some data.
I have done something like below.
3 text box with storage in d/b value TRUE.
Now I want on Click of Save button this 3 details gets saved.
My guess I need to write some Javascript on click of Save button, not sure how/what?
Pritesh
Internal storage in AC is deprecated so using d/b value= true will not do anything.
Store data securely into your own external database using Server Side functions (see this link )
Use SharedPreference to store data in App.
Like..
public static final String PREFS_NAME = "MyPrefsFile";
SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putString("name" valueOfName);
editor.putString("name" valueOfUserId);
editor.putString("name" valueOfPassword);
editor.commit();