Should I create a new Fragment instance every time with BottomNavigationView












0















I am trying to create an android app with BottomNavigationView and Fragments. My code is:



public class MainActivity extends AppCompatActivity {

//some code
//some code
//some code
//some code

private BottomNavigationView.OnNavigationItemSelectedListener
mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {

@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeHome).commit();
return true;
case R.id.navigation_dashboard:
getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeDashboard).commit();
return true;
case R.id.navigation_notifications:
getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeNotifications).commit();
return true;
}
return false;
}
};
}


Should I create a new object of each class every time, when the user select a different item on the menu?



Is it good practice to create one object for each class like below?



public class MainActivity extends AppCompatActivity {

//some code
//some code
//some code
//some code

private final Fragment home = new myframeHome();
private final Fragment dashboard = new myframeDashboard();
private final Fragment notifications = new myframeNotifications();

private BottomNavigationView.OnNavigationItemSelectedListener
mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {

@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
getFragmentManager().beginTransaction().replace(R.id.myframe, home).commit();
return true;
case R.id.navigation_dashboard:
getFragmentManager().beginTransaction().replace(R.id.myframe, dashboard).commit();
return true;
case R.id.navigation_notifications:
getFragmentManager().beginTransaction().replace(R.id.myframe, notifications).commit();
return true;
}
return false;
}
};
}


Which of the two methods should I use?










share|improve this question



























    0















    I am trying to create an android app with BottomNavigationView and Fragments. My code is:



    public class MainActivity extends AppCompatActivity {

    //some code
    //some code
    //some code
    //some code

    private BottomNavigationView.OnNavigationItemSelectedListener
    mOnNavigationItemSelectedListener
    = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    switch (item.getItemId()) {
    case R.id.navigation_home:
    getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeHome).commit();
    return true;
    case R.id.navigation_dashboard:
    getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeDashboard).commit();
    return true;
    case R.id.navigation_notifications:
    getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeNotifications).commit();
    return true;
    }
    return false;
    }
    };
    }


    Should I create a new object of each class every time, when the user select a different item on the menu?



    Is it good practice to create one object for each class like below?



    public class MainActivity extends AppCompatActivity {

    //some code
    //some code
    //some code
    //some code

    private final Fragment home = new myframeHome();
    private final Fragment dashboard = new myframeDashboard();
    private final Fragment notifications = new myframeNotifications();

    private BottomNavigationView.OnNavigationItemSelectedListener
    mOnNavigationItemSelectedListener
    = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    switch (item.getItemId()) {
    case R.id.navigation_home:
    getFragmentManager().beginTransaction().replace(R.id.myframe, home).commit();
    return true;
    case R.id.navigation_dashboard:
    getFragmentManager().beginTransaction().replace(R.id.myframe, dashboard).commit();
    return true;
    case R.id.navigation_notifications:
    getFragmentManager().beginTransaction().replace(R.id.myframe, notifications).commit();
    return true;
    }
    return false;
    }
    };
    }


    Which of the two methods should I use?










    share|improve this question

























      0












      0








      0








      I am trying to create an android app with BottomNavigationView and Fragments. My code is:



      public class MainActivity extends AppCompatActivity {

      //some code
      //some code
      //some code
      //some code

      private BottomNavigationView.OnNavigationItemSelectedListener
      mOnNavigationItemSelectedListener
      = new BottomNavigationView.OnNavigationItemSelectedListener() {

      @Override
      public boolean onNavigationItemSelected(@NonNull MenuItem item) {
      switch (item.getItemId()) {
      case R.id.navigation_home:
      getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeHome).commit();
      return true;
      case R.id.navigation_dashboard:
      getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeDashboard).commit();
      return true;
      case R.id.navigation_notifications:
      getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeNotifications).commit();
      return true;
      }
      return false;
      }
      };
      }


      Should I create a new object of each class every time, when the user select a different item on the menu?



      Is it good practice to create one object for each class like below?



      public class MainActivity extends AppCompatActivity {

      //some code
      //some code
      //some code
      //some code

      private final Fragment home = new myframeHome();
      private final Fragment dashboard = new myframeDashboard();
      private final Fragment notifications = new myframeNotifications();

      private BottomNavigationView.OnNavigationItemSelectedListener
      mOnNavigationItemSelectedListener
      = new BottomNavigationView.OnNavigationItemSelectedListener() {

      @Override
      public boolean onNavigationItemSelected(@NonNull MenuItem item) {
      switch (item.getItemId()) {
      case R.id.navigation_home:
      getFragmentManager().beginTransaction().replace(R.id.myframe, home).commit();
      return true;
      case R.id.navigation_dashboard:
      getFragmentManager().beginTransaction().replace(R.id.myframe, dashboard).commit();
      return true;
      case R.id.navigation_notifications:
      getFragmentManager().beginTransaction().replace(R.id.myframe, notifications).commit();
      return true;
      }
      return false;
      }
      };
      }


      Which of the two methods should I use?










      share|improve this question














      I am trying to create an android app with BottomNavigationView and Fragments. My code is:



      public class MainActivity extends AppCompatActivity {

      //some code
      //some code
      //some code
      //some code

      private BottomNavigationView.OnNavigationItemSelectedListener
      mOnNavigationItemSelectedListener
      = new BottomNavigationView.OnNavigationItemSelectedListener() {

      @Override
      public boolean onNavigationItemSelected(@NonNull MenuItem item) {
      switch (item.getItemId()) {
      case R.id.navigation_home:
      getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeHome).commit();
      return true;
      case R.id.navigation_dashboard:
      getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeDashboard).commit();
      return true;
      case R.id.navigation_notifications:
      getFragmentManager().beginTransaction().replace(R.id.myframe, new myframeNotifications).commit();
      return true;
      }
      return false;
      }
      };
      }


      Should I create a new object of each class every time, when the user select a different item on the menu?



      Is it good practice to create one object for each class like below?



      public class MainActivity extends AppCompatActivity {

      //some code
      //some code
      //some code
      //some code

      private final Fragment home = new myframeHome();
      private final Fragment dashboard = new myframeDashboard();
      private final Fragment notifications = new myframeNotifications();

      private BottomNavigationView.OnNavigationItemSelectedListener
      mOnNavigationItemSelectedListener
      = new BottomNavigationView.OnNavigationItemSelectedListener() {

      @Override
      public boolean onNavigationItemSelected(@NonNull MenuItem item) {
      switch (item.getItemId()) {
      case R.id.navigation_home:
      getFragmentManager().beginTransaction().replace(R.id.myframe, home).commit();
      return true;
      case R.id.navigation_dashboard:
      getFragmentManager().beginTransaction().replace(R.id.myframe, dashboard).commit();
      return true;
      case R.id.navigation_notifications:
      getFragmentManager().beginTransaction().replace(R.id.myframe, notifications).commit();
      return true;
      }
      return false;
      }
      };
      }


      Which of the two methods should I use?







      java android android-fragments bottomnavigationview






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 2 at 18:13









      GeorgeGeorge

      103




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