i have two class in my project.the first one is" public class Schtimetable extends Activity" in which there is a method i need to call in Class B :"public class ClassMode" .The method is
public int calculateWeeks() {
SharedPreferences preferences = getSharedPreferences("currentWeek",
Context.MODE_PRIVATE);
int csweek = preferences.getInt("CSweek", 1);
int weekofyear = preferences.getInt("currentWeek", 0);
int now_weekofyear = Calendar.getInstance().get(Calendar.WEEK_OF_YEAR);
return (csweek + now_weekofyear - weekofyear);// return current week
}
i find i can't use it just like this:
Schtimetable s = new Schtimetable();
int oddOReven = cursor.getInt(cursor.getColumnIndex("oddOReven"));
cursor.close();
if ((s.calculateWeeks() % 2 == oddOReven) || (oddOReven == 2)) {
Log.i(TAG, "has Class is true");
return true;
} else {
Log.i(TAG, "has Class is false");
return false;
}
in all,i want to have a data by the method calculateweeks() returned,how can i get it. Thanks !
Don't call methods from activities. Activities are meant to be started, not instantiated like a plain old java object. Place the method elsewhere (in some other helper class) and have it take a Context as an argument (so you can get the SharedPreferences). Then, in any activity you can call that method. Also, you should probably make the method static.
ReplyDeleteuse like this
ReplyDeleteYourActivtyClass activityclassobject = new YourActivtyClass();
activityclassobject.activityclassmethod();
use this in your non activity class
which is called from another activity class...
i hope you understand process to call method..