How do i get these values to save? - java

I need the inserted values in this edittext to show up after i quit the application. I currently have it set up so it'll set new default values if this is the first time for a user to set up the settings page but i can't get the set values to save and load the same values. Here is my code.
if (res.equals("555")) {
//post the saved text
} else if (res.equals("510")) {
editTextname.setText("Firstname Lastname", TextView.BufferType.EDITABLE);
editTextphone.setText("XXX-XXX-XXXX", TextView.BufferType.EDITABLE);
editTextemail.setText("name#yourdomain.com", TextView.BufferType.EDITABLE);
editTextaddress.setText("Street, City, State, Zip", TextView.BufferType.EDITABLE);
//save the entered text above and show it
}

Use SharedPreferences:
SharedPreferences prefs = getSharedPreferences("MyPreference", MODE_PRIVATE);
// On first run:
SharedPreferences.Editor editor = prefs.edit();
if(!prefs.contains("key1"))
editor.putString("key1", "defaultValue1");
if(!prefs.contains("key2"))
editor.putString("key2", "defaultValue2");
editor.commit();
// On save:
SharedPreferences.Editor editor = prefs.edit();
editor.putString("key1", "value1");
editor.putString("key2", "value3");
editor.commit();
// On read:
String value1 = prefs.getString("key1");
String value2 = prefs.getString("key2");

Related

Shared Preferences save more than 1 value at the same time

I'm new to android programming and I was wondering if it's possible to add more than one value in shared preferences at the same time. I have tried the following, but when I try to get the values I can see only the first one. The other value is getting the default value. Can you help me, please?
My code:
SharedPreferences.Editor editor = getSharedPreferences("prefs", Context.MODE_PRIVATE).edit();
String string1 = "myString1";
String string2 = "myString2";
editor.putString(string1, string2).apply();
SharedPreferences preferences = getSharedPreferences("prefs", Context.MODE_PRIVATE);
String string1FromSP = preferences.getString(string1, "default");
String string2FromSP = preferences.getString(string2, "default");
Log.e("Value 1", string1FromSP);
Log.e("Value 2", string2FromSP);
Values in Android SharedPreference gets stored like Key Value pair. And You are trying to store it all together like list or varargs.
So to save the values in Your example
SharedPreferences.Editor editor = getSharedPreferences("prefs", Context.MODE_PRIVATE).edit();
String string1 = "myString1";
String string2 = "myString2";
editor.putString("STRING_1", string1).apply();
editor.putString("STRING_2", string2).apply();
SharedPreferences preferences = getSharedPreferences("prefs", Context.MODE_PRIVATE);
String string1FromSP = preferences.getString("STRING_1", "default");
String string2FromSP = preferences.getString("STRING_2", "default");
Log.e("Value 1", string1FromSP);
Log.e("Value 2", string2FromSP);

Storing a 1D array of strings in Shared Preferences

I have two arrays, the first consists of 9 buttons. The second can hold 9 Strings. I have a method called getPlayerChoiceText to populate the String array with the text that is set on each button from the playerchoice Array. How can I save this text using SharedPreferences?
private String[] getPlayerChoiceText()
{
playerchoiceText[0] = playerchoice[0].getText().toString();
playerchoiceText[1] = playerchoice[1].getText().toString();
playerchoiceText[2] = playerchoice[2].getText().toString();
playerchoiceText[3] = playerchoice[3].getText().toString();
playerchoiceText[4] = playerchoice[4].getText().toString();
playerchoiceText[5] = playerchoice[5].getText().toString();
playerchoiceText[6] = playerchoice[6].getText().toString();
playerchoiceText[7] = playerchoice[7].getText().toString();
playerchoiceText[8] = playerchoice[8].getText().toString();
return playerchoiceText;
}
private void saveData()
{
SharedPreferences sharedPreferences = getSharedPreferences(SHARED_PREFS, MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
playerchoiceText = getPlayerChoiceText();
}
I have got the same problem. I solved it by using JSONArray.
JSONArray choices = new JSONArray();
choices.put("1");
choices.put("2");
choices.put("3");
// Save
SharedPreferences sharedPreferences = getSharedPreferences(SHARED_PREFS, MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("choices", choices.toString());
// Retrieve
choices = new JSONArray(sharedPreferences.getString("choices", "[]"));
In this way, you can easily do Insert and Delete operations. I hope this helps.
Android's SharedPreferences operates as a key value store, and does not allow you to directly store Java objects. So, representing your player choice text values as a map would make more sense, if you want to store them using shared preferences.
There is one trick you might be able to use here, if you wanted to continue representing your choice texts as an array. You could store the texts using a delimiter, e.g. pipe:
String choices = String.join("|", playerchoiceText);
SharedPreferences prefs = getSharedPreferences(YOUR_PREFS_KEY, Context.MODE_PRIVATE);
prefs.edit().putString("choices", choices).apply();
And then, on the way out:
SharedPreferences prefs = getSharedPreferences(YOUR_PREFS_KEY, Context.MODE_PRIVATE);
String[] playerchoiceText = prefs.getString("choices", "").split("\\|");
Use put/getStringSet():
private void saveData()
{
SharedPreferences sharedPreferences = getSharedPreferences(SHARED_PREFS, MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
String[] playerchoiceText = getPlayerChoiceText();
editor.putStringSet("player_choice", new HashSet<T>(Arrays.asList(playerchoiceText));
editor.commit();
}

How to save web page informations?

I want my app to check some web page only once a day, so I want the data to be saved anded reloaded upon starting the app again.
I followed this tutorial, but I can not save the result with MainActivity extends AppCompatActivity:
String url = "https://en.wikipedia.org/wiki/Main_Page";
SharedPreferences data;
SharedPreferences.Editor dataEditor;
String sDate = date.getString("date", "");
DateFormat df = new SimpleDateFormat("MMMM d");
String date = df.format(Calendar.getInstance().getTime());
if(sDate != date){ // <-- this does not work
new Date().execute();
}
and Date extends AsyncTask<Void, Void, Void>:
Document document = Jsoup.connect(url).get();
Elements date = document.select("div#mp-otd p b");
String sDate = date.getText();
dataEtitor.setString("date", sDate)
dataEtitor.commit;
The "Date extends AyncTask" class always start.
editor.commit() is used in order to save changes to shared preferences.
Add below line of code after setString
dataEtitor.commit(); // commit changes
SharedPreferences Example as follow
SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0); // 0 - for private mode
Editor editor = pref.edit();
Storing Data
editor.putBoolean("key_name", true); // Storing boolean - true/false
editor.putString("key_name", "string value"); // Storing string
editor.putInt("key_name", "int value"); // Storing integer
editor.putFloat("key_name", "float value"); // Storing float
editor.putLong("key_name", "long value"); // Storing long
editor.commit(); // commit changes
Retrieving Data
pref.getString("key_name", null); // getting String
pref.getInt("key_name", null); // getting Integer
pref.getFloat("key_name", null); // getting Float
pref.getLong("key_name", null); // getting Long
pref.getBoolean("key_name", null); // getting boolean
Clearing or Deleting Data
editor.remove("name"); // will delete key name
editor.remove("email"); // will delete key email
editor.commit(); // commit changes
editor.clear();
editor.commit(); // commit changes
You muss use !(sDate.equals(date) in place of sDate != date, because the Strings are new and so they can not be compare each other.

How to Totalize all the score with Sharedpreferences?

As i know the basic of save int value with sharedpreferences method is using this
SharedPreferences pref = getSharedPreferences("SavedGame", MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
editor.putInt("savedscore", Score);
editor.commit();
and then we can get the int value in another activity using this
SharedPreferences pref = getSharedPreferences("SavedGame", MODE_PRIVATE);
Score = pref.getInt("savedscore", 0);
Scoretext = (TextView)findViewById(R.id.textscore);
Scoretext.setText(String.valueOf(score));
and my question is how to totalize all the score that we got when we playing in another activity?
example ;
when i play for the first time i got the score 4000 , so of course when we use this method editor.putInt("savedscore", Score); it will save the score value and then we got the score value in another activity with using this Score = pref.getInt("savedscore", 0); it will make the int Score value to 4000
and then i play again then i got score 2000 , so of course the sharedpreferences Score = pref.getInt("savedscore", 0); int Score value will change to 2000 and not totalize
so that is my question how to Totalize the score?
Simply create another preference entry "totalScore" and increment it accordingly (each time you save a new score):
//...
SharedPreferences pref = getSharedPreferences("SavedGame", MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
editor.putInt("savedscore", Score);
editor.commit();
updateTotalScore(Score)
//..
private void updateTotalScore(int newScore){
SharedPreferences pref = getSharedPreferences("totalScore", MODE_PRIVATE);
int current = pref.getInt("totalScore", 0);
SharedPreferences.Editor editor = pref.edit();
editor.putInt("totalScore", current+newScore);
editor.commit();
}
private int getTotalScore(){
SharedPreferences pref = getSharedPreferences("totalScore", MODE_PRIVATE);
return pref.getInt("totalScore", 0);
}

sharedpreferences wont remember values in android

Here is the code where I put the values:
if(soundima == 1){
soundima=0;
editor.putInt("sOn", soundima);
editor.commit();
}
else if(soundima == 0){
soundima=1;
editor.putInt("sOn", soundima);
editor.commit();
}
Then when I quit the application, the values are not remembered. I get the values with this code:
editor = PreferenceManager.getDefaultSharedPreferences(this);
soundima = editor.getInt("sOn", 0);
I am not entirely sure why that is not working. However, the following code should solve the problem.
//create a constant to use for the shared preferences
public static final String YOUR_CONSTANT = "Preferences";
Then to place the values in shared preferences, use the following code:
if(soundima == 1){
soundima = 0;
SharedPreferences sound = getSharedPreferences(YOUR_CONSTANT,0);
SharedPreferences.Editor editor = sound.edit();
editor.putInt("sOn", soundima);
editor.commit();
}
else if(soundima == 0){
soundima = 1;
SharedPreferences sound = getSharedPreferences(YOUR_CONSTANT,0);
SharedPreferences.Editor editor = sound.edit();
editor.putInt("sOn", soundima);
editor.commit();
}
Then to retrieve the values, use this code:
SharedPreferences sound = getSharedPreferences(YOUR_CONSTANT,0);
soundima = sound.getInt("sOn", 0);

Categories