条件がtrueの場合、ボタン内部のフラグメントonclickを置き換える方法は？私は以下のコードで条件ならば置けば

Question

フラグメントの交換は

 _doneButton.setOnClickListener(new Button.OnClickListener() { 

      @Override 
     public void onClick(View _view) { 


      Name(no.getText().toString(), pass.getText().toString()); 
     if(loginsucess){ 


     android.support.v4.app.FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction(); 

      MainFragment mainFragment = new MainFragment(); 
      ft.replace(R.id.content, mainFragment); 
      ft.addToBackStack(null); 
      ft.commit(); 
    } 

Answer 1

_doneButton.setOnClickListener(new Button.OnClickListener() { 

@Override 
public void onClick(View _view) { 

if(true){ 

Name(no.getText().toString(), pass.getText().toString()); 


android.support.v4.app.FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction(); 

MainFragment mainFragment = new MainFragment(); 
ft.replace(R.id.content, mainFragment); 
ft.addToBackStack(null); 
ft.commit(); 
} 

Answer 2

は、条件がどのようなものです。この

if(loginsucees){ 
android.support.v4.app.FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction(); 

      MainFragment mainFragment = new MainFragment(); 
      ft.replace(R.id.content, mainFragment); 
      ft.addToBackStack(null); 
      ft.commit(); 
} 
else { 
//Do Nothing 
} 

Answer 3

_doneButton.setOnClickListener(new Button.OnClickListener() { 

    @Override 
    public void onClick(View _view) { 
if(loginsucees){ 
Name(no.getText().toString(), pass.getText().toString()); 
    FragmentManager manager = getSupportFragmentManager(); 
    FragmentTransaction ft = manager.beginTransaction(); 
    MainFragment mainFragment = new MainFragment(); 
    ft.replace(R.id.content, mainFragment,"main_fragment"); 
    ft.commitAllowingStateLoss(); 
    } 
} 
});