Iam trying to make a checker and I want to save a value into SharedPreferences. But i'am not sure if it works
This what I do to save the value is : *
SharedPreferences prefs = getSharedPreferences("PREFERENCE", MODE_PRIVATE);
boolean firstrun = prefs.getBoolean("firstrun", true);
db = openOrCreateDatabase("value.db", Context.MODE_PRIVATE, null); // optional CursorFactory
if (firstrun) {
SharedPreferences.Editor editor = prefs.edit();
db.execSQL("CREATE TABLE startValue (ID Integer Primary Key, myValue Integer)");
db.execSQL("INSERT INTO startValue (myValue) VALUES (2)");
editor.putBoolean("firstrun", false);
editor.apply();
}
// Save the state
getSharedPreferences("PREFERENCE", MODE_PRIVATE)
.edit()
.putBoolean("firstrun", false)
.commit();
And to Clear the preferenece from another activity is :
try{
db = openOrCreateDatabase("value.db", Context.MODE_PRIVATE, null); // optional CursorFactory
db.execSQL("DROP TABLE IF EXISTS startValue");
db.close();
SharedPreferences preferences = getPreferences(0);
SharedPreferences.Editor editor = preferences.edit();
editor.remove("firstrun");
editor.clear();
editor.commit();
this.finish();
}
catch(SQLException ex)
{
//catch error here
}
Issue
But when i'am testing as I see its not clearing the preferences. Am I doing something wrong or?
To clear SharedPreferences use this
SharedPreferences preferences = getSharedPreferences("PREFERENCE", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.clear();
editor.commit();
Hope this helped you.