I'm trying to get integer Value from Second activity and save in the main activity
and its succeed
i tried to save that value in SharedPreferences
the problem every time im re-open the app
and check saved date in SharedPreferences I found the default value ( in this case LanguageSelected,1 )
What is the problem?
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = getIntent();
languageCheck = intent.getIntExtra(Language.LanguageSelected,1);
// saving data
SharedPreferences sharedPreferences = getSharedPreferences("whatsappfastmessage",MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putInt("languageValue", languageCheck);
editor.commit();
sharedPreferences = getSharedPreferences("whatsappfastmessage",MODE_PRIVATE);
savedValue = sharedPreferences.getInt("languageValue", languageCheck);
i Solved the issue ,
i didn't know that SharedPreferences file can be access from any activities
just write the code of retrieve
best regards
Related
I have one application that uses SharedPreferences to record the checkin or checkout state of the user.
If the checkin is pressed, it's button is grayed out the checkout becomes available, the opposite work as well.
However some users tells me that "sometimes" they will make another checkin on the next day and the checkout is still available.
Im supecting that they are forgetting to tap it, but i want to know if is there by any chance that this SharedPreferencces get cleared by itself?
this is the part of my code that i save the checkin state:
SharedPreferences preferences = getSharedPreferences("MyPreferences", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("statuscheckin", 1); //1 for checkin, 0 for checkout
editor.commit();
this is the part where i check it
if (getSharedPreferences("MyPreferences", Context.MODE_PRIVATE).getInt("statuscheckin", 0) == 1) {...}
Unless you clear the storage/cache, SharedPreferences won't get cleared by itself.
Make sure you are not clearing it by yourself for any condition happening.
If you are getting the default value only, it's possible that you are using it before the value gets committed.
Try this code,
Session Manager code:
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
Context context;
public static final String KEY_CHECKIN= "checkin";
public void setCheckin(boolean login){
editor = sharedPreferences.edit();
editor.putBoolean(KEY_CHECKIN,checkin);
editor.apply();
}
public boolean getCheckin(){
return sharedPreferences.getBoolean(KEY_CHECKIN,false);
}
In your Java code:
SessionManager sessionmanager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sessionmanager = new SessionManager(this);
//Condition for checkin
if(user checkedIn){
sessionmanager.setCheckin(true);}
//Retrieving the value when user again opens the app:
if(sessionmanager.getCheckin()){}////proceed with your logic.
I make a setup class with shared preferences and in the first open apk the user use the default value and after edit if he want it with update value. My problem is when re open the apk and no create preference apk display default value else if there is old preference display this. I want update preferences onCreate with old save preferences if preferences exist(no with default value). How I create this? I want something if pref exist go to share preference...and read value...else use the default
String strValue ="http://www.power7.net/LEDstate.txt";//default value
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ioweb_bt);
/* SharedPreferences preferences = getSharedPreferences("dataioweb" , MODE_PRIVATE);
String strValue = preferences.getString("Url","");
text = (TextView) findViewById(R.id.textUrl);
text.setText(strValue);
*/
edittxtUrl = (EditText)findViewById(R.id.txtUrl);
edittxtUrl.setText(strValue);
}
public void Save(View view) {
SharedPreferences preferences = getSharedPreferences("dataioweb" , MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit(); // Put the values from the UI
edittxtUrl = (EditText)findViewById(R.id.txtUrl);
String strUrl = edittxtUrl.getText().toString();
editor.putString("Url", strUrl); // value to store
// Commit to storage
editor.commit();
Change your code as for setting default value in TextView when user start your Application or any value not exist in SharedPreferences
SharedPreferences preferences;
String strValue="";
TextView text;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ioweb_bt);
text = (TextView) findViewById(R.id.textUrl);
preferences = getSharedPreferences("dataioweb" , MODE_PRIVATE);
strValue = preferences.getString("Url","");
if(!strValue.equals("")){
text.setText(strValue);
}
else{
text.setText("Set Default value here");
}
// your code here
In this way, you can get default value from preference if no value is their corresponding to your preference key
SharedPreferences preferences=getSharedPreferences(preferencename, MODE_PRIVATE);
String str=preferences.getString(key, defaultValue);
I want some variables to be saved, when I shut down my app and to load them after opening the app (for statistics in a game)
How can I do this?
EDIT: Here my code:
TextView test1;
String punkte = "15";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SharedPreferences save = getSharedPreferences(punkte, 0);
save.edit().putString("score", punkte);
SharedPreferences load = getSharedPreferences(punkte, 0);
String points = load.getString("score", "0");
test1 = (TextView) findViewById(R.id.test1);
test1.setText(points);
}
You should be using SharedPrefences. They are quite simple to use and will store the variables in the application data. As long as the user never hits "Clear Data" in the settings for your application, they will always be there.
Here is a code sample.
To access variables:
SharedPreferences mPrefs = getSharedPreferences("label", 0);
String mString = mPrefs.getString("tag", "default_value_if_variable_not_found");
To edit the variables and commit (store) them:
SharedPreferences.Editor mEditor = mPrefs.edit();
mEditor.putString("tag", value_of_variable).commit();
Make sure both "tag" fields match!
Use SharedPreference, this is a better option.
To see this tutorial.
sample code:
save:
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor editor = settings.edit();
editor.putString("statepara1", ts);
editor.commit();
get:
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
String ret = settings.getString("statepara1", "0");
I am trying to save a date in one activity and then have that date put in a textView in another activity. I am not sure about how to get the two activities to communicate with each other.
In file called report.java I have this method that gets the date and save it in sharedPrefernces.
private void updateLabel() {
date.setText(fmtDate.format(dateAndTime.getTime()));
SharedPreferences preferences = getPreferences(MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("date", date.getText().toString()); // value to store
editor.commit();
}
I am trying to figure out how to get my file called inspection use this to populate a textView
The problem I think I am having is with getting the correct name for the report file.
public static final String PREF_FILE_NAME = "report";
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
then I have this code on a method called onResume()
#Override
public void onResume() {
super.onResume();
SharedPreferences preferences = getPreferences(MODE_PRIVATE);
String strDate=preferences.getString("date", date.getText().toString());
date.setText(strDate);
}
You are saving the value to two seperate preference files.
SharedPreferences preferences = getPreferences(MODE_PRIVATE);
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
Use only one.
Why not use the default preference file that is accessible by all classes/activities of your app?
SharedPreferences preference = PreferenceManager.getDefaultSharedPreferences(yourContext);
preferences.edit().putString(YOURKEY, yourStrValue);
This way you are not creating extra preference files in your app that you have to remember which values are stored in which files. Definately makes life easier.
i have a default activity that starts first (Activity A), and from there the user can go to another activity (Activity B). In B after some work the user sets a sharedpreference. the next time the app starts i want to check in A if sharedpreference is null to go to B. and i put this if just under
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
and it encapsulates the whole onCreate. when the app starts it skips A and on B i shows the layout and the FC with NullPointerException.
Any one got experience with this?
OR
any one got a better idea on skipping A?
Well Simon you have to use Shared prefrences. save your data in shared prefrences. Then in the activity where you want to use the data in Shared prefres again get instance of same shared prefrence. get the data and use it.
go through this code
public class Calc extends Activity {
public static final String PREFS_NAME = "MyPrefsFile";
#Override
protected void onCreate(Bundle state){
super.onCreate(state);
. . .
// Restore preferences
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
boolean silent = settings.getBoolean("silentMode", false);
setSilent(silent);
}
#Override
protected void onStop(){
super.onStop();
// We need an Editor object to make preference changes.
// All objects are from android.context.Context
SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("silentMode", mSilentMode);
// Commit the edits!
editor.commit();
}
}
probably you will get an insight
To answer my own question. i had a location listener in onDestroy an because it was not initialized because of skipping onCreate it returned NullPointer.