I want do something like this:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
int i = (int) (new Date().getTime()/1000);
if( ) // next day
{
mymethod();
}
}
When in system date is a new day, then I want to call mymethod()
With new day do you mean after midnight? So you want to detect if the date is different from last time?
#Override
protected void onResume() {
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
int lastTimeStarted = settings.getInt("last_time_started", -1);
Calendar calendar = Calendar.getInstance();
int today = calendar.get(Calendar.DAY_OF_YEAR);
if (today != lastTimeStarted) {
//startSomethingOnce();
SharedPreferences.Editor editor = settings.edit();
editor.putInt("last_time_started", today);
editor.commit();
}
}
It is recommended to use Calendar class instead of Date. You can check whether a day passed like this:
On some event, e.g. button click, app first start, save the time in sharedPreferences
Retrieve that value and compare it to the current time
Just an illustration on how to do this:
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
Calendar c = Calendar.getInstance();
int currentTimeSeconds = c.get(Calendar.SECOND);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
int secondsPreviousDay = prefs.getInt("seconds", 0);
if (secondsPreviousDay != 0){ //means there was an earlier set value from previously entering the activity
//compare if more than 3600*24 = 86400 (1 day in seconds) had passed
if (currentTimeSeconds - secondsPreviousDay > 86400){
mymethod();
}
}
else {
prefs.edit().putInt("seconds", currentTimeSeconds).apply();
}
}
In my code I've presumed that you want to see if a day has passed from the first time you've started this activity until the second time. You can tweak this to your preference, but I hope the idea is understandable.
I know I could've compacted those 2 if's into one, but I just wanted it to be more clear what I was after.
Great idea!
In my first activity I set something like this inside onCreate :
Calendar c = Calendar.getInstance();
int currentTimeSeconds = c.get(Calendar.SECOND);
SharedPreferences share = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor edittime = share.edit();
edittime.putInt("timevalue",currentTimeSeconds);
edittime.commit();
and use your code in another activity inside onCreate:
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
int secondsPreviousDay = prefs.getInt("seconds", 0);
if (secondsPreviousDay != 0){ //means there was an earlier set value from previously entering the activity
//compare if more than 3600*24 = 86400 (1 day in seconds) had passed
if (currentTimeSeconds - secondsPreviousDay > 86400){
// mymethod();
mymethod();
}
}
else {
prefs.edit().putInt("seconds", currentTimeSeconds).apply();
}
}
I'm sorry for that but I'm still learning
Related
In the following piece of code, one of the mEditor lines, doesn't appear to execute.
I've tried many different combinations so far, but can't get it to execute properly. The value is not set at all.
If i try to use the value, like in a Toast, I will receive a ResourcesNotFound Exception
Initialization of SharedPreference in my onCreateView, Fragment
mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
mEditor = mSharedPreferences.edit();
public void onClick(View view) {
int round_number = mSharedPreferences.getInt(getString(R.string.pref_round_played),0);
if (round_number == 0){
game_team.setBackgroundResource(R.drawable.t);
game_team.setVisibility(View.VISIBLE);
knap_bund.setVisibility(View.INVISIBLE);
knap_top.setText("Next Strat");
mEditor.putString(getString(R.string.pref_chosen_team), "T");
mEditor.putInt(getString(R.string.pref_round_played),round_number + 1);
mEditor.apply();
//Show CT side Pistol round here//
}
Following code is used in my onClick, which has other sharedPreferences, working the exact same way, which executes fine.
The first line executes just fine, but the second line containing 'putInt' isn't executing as intended.
mEditor.putString(getString(R.string.pref_chosen_team), "T");
mEditor.putInt(getString(R.string.pref_round_played), 1);
mEditor.apply();
Example of working code:
else if(round_number <= 30){
mEditor.putInt(getString(R.string.pref_round_played),round_number + 1);
mEditor.apply();
}
UPDATE
Just to clarify due to the comments. It's only this one occasion where the sharedPreferences won't work. I use it about 15 other places in this fragment, with no issues at all
I will receive a ResourcesNotFound Exception
I think R.string.pref_round_played is not exist,check it for your strings.xml
you're not posted for your detailed code so do it like this below to save values in shared preference
public static final String PREFS_NAME = "MyPrefsFile";
SharedPreferences.Editor editor = getSharedPreferences(PREFS_NAME , MODE_PRIVATE).edit();
editor.putString("name", "john");
editor.putInt("id", 123);
editor.apply();
Retrieve the data from shared preference
SharedPreferences prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
String name = prefs.getString("name", ""); // you can put default value if you need
int idName = prefs.getInt("id", 0);
if this is not works for you please post your full code
Update
change your code to this one
mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
SharedPreferences.Editor mEditor = mSharedPreferences .edit();
final Date today = new Date();
Calendar nextYear = Calendar.getInstance();
nextYear.add(Calendar.YEAR, 1);
CalendarPickerView datePicker = findViewById(R.id.calendarPickerView);
datePicker.init(today, nextYear.getTime()).withSelectedDate(today);
datePicker.setOnDateSelectedListener(new CalendarPickerView.OnDateSelectedListener() {
#Override
public void onDateSelected(Date date) {
Calendar calselected = Calendar.getInstance();
calselected.setTime(date);
final String selectedDate = "" +
calselected.get(Calendar.DAY_OF_MONTH) + "/" +
(calselected.get(Calendar.MONTH) + 1) + "/" +
calselected.get(Calendar.YEAR);
String user_uid = mAuth.getCurrentUser().getUid();
final DatabaseReference current_user_db = mDatabase.child(user_uid);
alterupdate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
current_user_db.child("Altered date").setValue(selectedDate);
startActivity(new Intent(first_activity.this, second_activity.class));
}
});
}
});
I created calendar picker and saved the output in "Altered date" field. But when a user selects other date it is overriding the current date. So, what is the best option to save all the altered dates?
But when a user selects other date it is overriding the current date.
This is happening because you are calling set() method on the same reference. Since every node in a Firebase database is a Map and in case of Map, it replaces the old value with the new one.
So, what is the best option to save all the altered dates?
To solve this, I recommend you to use the push() method. For that, please change the followig line of code:
current_user_db.child("Altered date").setValue(selectedDate);
to
current_user_db.child("Altered date").push().setValue(selectedDate);
I'm trying to implement a high score function in my app and I have created an int variable of score, but when I try to call it in another class, I keep getting "cannot resolve symbol 'score'".
int score = getIntent().getIntExtra("score", 0);
scoreLabel.setText(score + "");
SharedPreferences settings = getSharedPreferences("Game_Data", Context.MODE_PRIVATE);
int highScore = settings.getInt("High_Score", 0);
if(SystemClock.elapsedRealtime() > highScore){
highScoreLabel.setText("High Score : " + score);
//save
SharedPreferences.Editor editor = settings.edit();
editor.putInt("High_Score", score);
editor.commit();
}else {
highScoreLabel.setText("High Score : " + highScore);
}
}
Then I have the below code in a class where I call the function but that variable 'score' keeps showing as cannot resolve symbol. What can I do?
Intent intent = new Intent(getApplicationContext(), scoreKeeper.class);
intent.putExtra("score", score);
startActivity(intent);
Bear in mind I am a beginner so it could be something easy that I have missed.
Thanks.
In your string, there should be a placeholder : %1$s
Here %1 is the placeholder number, and $s is because it is a string.
Learn more here : Stiling Strings in section Formating Strings
Set score as global variable
public class MainActivity extends AppCompatActivity {
private int score; // set as global
#Override
public void onCreate(Bundle savedInstanceState) {
.......
}
}
Don't forget to remove the int in line
int score = getIntent().getIntExtra("score", 0);
I'm trying to save marker with Latlng and two strings with SharedPreferences and i'm doing a for loop to retrieve it when the activity is lunched again i had another question before because i couldn't delete the marker from the SharedPreferences So my mind is so missed up i can't figure it out what is the issue now please check the code below and any suggestions that could help i appreciated
I'm Using the et String so i match it to Marker title and on Marker Click i delete the Marker from sharedPreferences according to its title and already initilized the SharedPreferences in onCreated Method like so SharedPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
So I save the values like this,
int Int,cycler,IncreaseAmount;
String testSample;
private static final String StringLat= "Latitude",StringLng="Longitude",StringDis="Dis",StringName="Name";
String SinputNames = inputName.getText().toString();
Sinputdiscription = inputdiscription.getText().toString();
dLatitude = AddedLatLng.latitude;
dLongitude = AddedLatLng.longitude;
SharedPreferences.Editor editor = SharedPrefs.edit();
IncreaseAmount++;
editor.putInt("IJSS",IncreaseAmount);
IncreaseAmount = SharedPrefs.getInt("IJSS",0);
//SJSS = SinputNames;
//SJSS = Double.toString(dLatitude);
editor.putString("ErrorTest","Pulling up the info is working");
editor.putLong(SJSS+StringLat,Double.doubleToLongBits(dLatitude));
editor.putLong(SJSS+StringLng,Double.doubleToLongBits(dLongitude));
editor.putString(SJSS+StringName,SinputNames);
editor.putString(SJSS+StringDis,Sinputdiscription);
// editor.putString("lat"+ Integer.toString((IntCoords)), Double.toString(point.latitude));
editor.putString("ForLooper"+Integer.toString((IncreaseAmount)),SinputNames);
editor.apply();
and then pull it off from sharedPreferences
String CheckErrortest = SharedPrefs.getString("ErrorTest","Not working!");
Log.i("AlertSinput:",CheckErrortest);
cycler = SharedPrefs.getInt("IJSS",0);
if(cycler !=0) {
String Name="";
double Lat321,Lng321;
// Log.i("ifCycler","if Cycler != 0 is working");
Int = SharedPrefs.getInt("IJSS",0) +1;
for(int i=0; i< Int ; i++ ) {
Log.i("ForLoop:","The for loop is also working");
// editor.putString("ForLooper"+Integer.toString((IncreaseAmount)),SJSS+StringLat);
//Here i can't pull up the info
String iCheck = SharedPrefs.getString("Forlooper"+Integer.toString((Int)),"");
Log.i("TheMarkerName:","Should be"+iCheck);
Name = SharedPrefs.getString(iCheck+StringName,"Marker");
Lat321 = Double.longBitsToDouble(SharedPrefs.getLong(iCheck+StringLat,0));
Lng321 = Double.longBitsToDouble(SharedPrefs.getLong(iCheck+StringLng,0));
Log.i("Markertitle:#",Name);
Log.i("TestTheInteger:#",Integer.toString((Int)));
if(Lat321 !=0) {
AddedLatLng = new LatLng(Lat321,Lng321);
drawMarker(AddedLatLng,Name);
}
}
}
So the CheckErrortest and Log.i("ForLoop:","The for loop is also working");
are working Just fine but the String String iCheck = SharedPrefs.getString("Forlooper"+Integer.toString((Int)),"");
Is not working when i pull up the info for some reason and i couldn't figure out what is the issue anything that could help is appreciated thank you very much
I don't see you're commiting your changes. You need to do
editor.apply();
or
editor.commit();
All changes you make in an editor are batched, and not copied back to the original SharedPreferences until you call commit() or apply()
You need to apply your changes after work with editor.
editor.commit();
or
editor.apply();
I've managed to get my score to save to SharedPreferences correctly as well as it saving to highscore. However when checking if the previous score is better than the saved highscore, it always saves over it no matter what and I don't know why.
// save score and time if current score is > than current highscore and time is > than current hightime
if (score > scorePreferences.getInt("highscore", 0) && time > timePreferences.getInt("hightime", 0)) {
highscorePreferences = getContext().getSharedPreferences("highscore", 0);
SharedPreferences.Editor editorHighscore = highscorePreferences.edit();
editorHighscore.putInt("highscore", score);
editorHighscore.commit();
timePreferences = getContext().getSharedPreferences("hightime", 0);
SharedPreferences.Editor editorHightime = timePreferences.edit();
editorHightime.putInt("hightime", time);
editorHightime.commit();
}
It then gets read in gameoveractivity and highscore activity using this code:
// load score from last session
private void load() {
// get score and set text field
scorePreferences = getSharedPreferences("score", 0);
score = scorePreferences.getInt("score", 0);
scoreValue.setText(Integer.toString(score));
// get time and set text field
timePreferences = getSharedPreferences("time", 0);
time = timePreferences.getInt("time", 0);
timeValue.setText(Integer.toString(time) + " seconds");
// get highscore and set text field
highscorePreferences = getSharedPreferences("highscore", 0);
highscore = highscorePreferences.getInt("highscore", 0);
highscoreValue.setText(Integer.toString(highscore));
}
Should this:
if (score > scorePreferences.getInt("highscore", 0)...
...not be something like:
if (score > highscorePreferences.getInt("highscore", 0)...
The key "highscore" is in your preferences set with that same name. It looks like you are reading that key from the "score" preferences instead. It's not there, so the default of 0 is always being used.
It looks like you use same key for your sharedpreferences that is why the values override.
I would recommend using sqlite for storing top scores.
Use one SharedPreferences object. To save, you can do this:
SharedPreferences prefs = getSharedPreferences("score", Context.MODE_PRIVATE);
int highscore = prefs.getInt("highscore", 0);
int hightime = prefs.getInt("hightime", 0);
if (score > highscore && time > hightime) {
SharedPreferences.Editor editor = prefs.editor();
editor.putInt("highscore", score);
editor.putInt("hightime", time);
editor.commit();
}
Then load it, also use one SharedPreferences object:
private void load() {
SharedPreferences prefs = getSharedPreferences("score", Context.MODE_PRIVATE);
score = prefs.getInt("score", 0);
scoreValue.setText(Integer.toString(score));
time = prefs.getInt("time", 0);
timeValue.setText(Integer.toString(time) + " seconds");
highscore = prefs.getInt("highscore", 0);
highscoreValue.setText(Integer.toString(highscore));
}
NOTES:
it's a good idea to use keys for prefs file name and variables, so that you can avoid easy typo mistakes when saving/retrieving variables, eg.
public static final String PREFS_NAME = "score";
public static final String KEY_HIGHSCORE = "highscore";
public static final String KEY_HIGHTIME = "hightime";
then use it
SharedPreferences prefs = getSharedPreferences(ClassNameWhereItsDeclared.PREFS_NAME, Context.MODE_PRIVATE);
editor.putInt(ClassNameWhereItsDeclared.KEY_HIGHSCORE, score);
etc.
I don't see where you're saving time and score, but you can do it the same way as highscore and hightime