Develop Reference

Android Google Fit select max results

I try to develop some fitness application which will use Google Fit.
And i have one question. Assume that user make some sport activity a few days in a week. And want to show him his best result. The only way I know I can do this - is load all data from user history and then select the set with maximum value.
And its obvious that I dont like that method because of the fact that I should load all the history. (And the user can have history for a few years).
Another way is to store data in local database (so i dont need to load all history every time the user want to see his best result) and synch it with google fit data, but I think its too dificult.
Do we have some other options for that kind of tasks?

Use sharedpreferences to save the value,
To set value
SharedPreferences prefs = this.getSharedPreferences("myhighestscore", Context.MODE_PRIVATE);
Editor editor = prefs.edit();
editor.putInt("key", score);
editor.commit();
To get value
SharedPreferences prefs = this.getSharedPreferences("myhighestscore", Context.MODE_PRIVATE);
int score = prefs.getInt("key", 0);
here is a link.
Using Shared Preferences

Android save EditText text

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", "");

Does SharedPreferences work in Eclipse emulator?

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

using shared preferences in android to fill data in forms

I am developing an android Application for managing and creating personal and business cards.
How can I use Shared Preferences (where i will be storing my personal and professional information ) in creating the cards.
Every time i need to create a new card, the program should ask me to gather information from the Shared Preferences and also my "create new Card" form should ask for adding new fields (like another or new e-mail not present in shared preferences ) dynamically.
please let me know any sample examples explaining such scenario..... I have extensively searched over internet to find some, but couldn't get any as per my requirement.
Thankyou.

For your requirement it should be better to use sqlite database. because if you are adding more records then it always better to use database for storing similar type of data..
otherwise if you want to use Shared Preference only then try like this...
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
//Storing data
Editor edit = preferences.edit();
edit.putString("pref_empId", _empid);
edit.putString("pref_userName", _username);
edit.putString("pref_userType", _usertype);
edit.commit();
//Retrieving
pref_userName = preferences.getString("pref_userName", "n/a");
pref_empId = preferences.getString("pref_empId","n/a");
pref_userType = preferences.getString("pref_userType","n/a");

In shared preferences you can store the info as key-value pair. For details read http://developer.android.com/guide/topics/data/data-storage.html#pref

android save settings and information

i am new to android, i searched a lot and couldn't find a satisfying answer; what i need is to save some setting for my application such as
1> language, number of items to display, display/not display images, etc...
which i think is best done using the shared preferences
2> save which data categories to get from the internet...
here is my problem:
i have data divided into category objects with key, name, type, data[]...(data[] is changing all the time and not saved after exiting the application),(key, name, type are final values defined by programmer).
and because there are many categories which the user may or may not want to load(around 25), he/she can choose which categories to display, and these choices must be saved.
i think using shared preferences will not help because of the complexity of the data; i was thinking of using sqlite or xml, not sure which is the best choice keeping in mind efficiency and memory size.
note: i am using a global variable for the category information array, that is because data[] needs to be refreshed automatically every 2-3 minutes and must be available to all activities also efficiency and memory space are an issue.
i will appreciate any advice, thank you in advance.

1> SharedPreferences is the right choice
2> you have multiple possibilities
a) Use the internal storage and use Object Serialization (for simplicity reasons), xml (if you want to exchange the data) or use a own format
b) SQLite is the fastest solution. But you have to do more programming for that
b would be my choice, so create a DB-Object (static or singleton pattern) and write functions for every database task

1) Yes, SharedSettings should help youy. There is plenty information around, but post back if you are lost.
2) I would make a table with all the categories and a boolean value thats says "show" where you can keep if the user wants to show it or not.
Of course it depends on the size of the categories and how much they change, because otherwise you will be updating the database forever.

User shared preference in store your setting,
SharedPreferences sharedPreferences = this.applicationContext.getSharedPreferences(preferencesName, Context.MODE_PRIVATE);
//For saving the setting:
//for storing long
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putLong(key, value);
//for storing string editor.commit();
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(key, value);
editor.commit();
//and similarly for int,float etc
//For Retrieving the string:
sharedPreferences.getLong(key, defaultValue); //for long value
sharedPreferences.getSting(key, defaultValue); //for string value