CODEWITHSUNDEEP
androidandroid-layoutandroid-intentandroid-fragments
Mellon
Mellon

Reputation: 38902

Toggle Button is checked automatically at runtime when back to fragment

I have 2 Fragments.

FirstFragment has only a button. When user press the button, the SecondFragment is shown.

Both fragments are in backstack. So, when SecondFragment is shown, if user press physical back button, the FirstFragment will be shown.

Everything works fine at this point.

Now, on SecondFragment layout, I added an ToggleButton:

<ToggleButton 
    android:id="@+id/my_toggle"
    android:checked="false"

    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textOn="@string/on"
        android:textOff="@string/off"
/>

My SecondFragment.java :

public class SecondFragment extends Fragment{

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle bundle){
    super.onCreateView(inflater, container, savedInstanceState);

   //My Toggle Button
    myToggleBtn.setOnCheckedChangeListener(
       new CompoundButton.OnCheckedChangeListener(){
           @Override
           public void onCheckedChanged(CompoundButton buttonView, boolean isChecked){

            Log.v("*TOGGLE CHECK CHANGED*",String.valueOf(isChecked));

            if(isChecked){
                //DO SOME THING 

            }else{  
                //DO SOMETHING ELSE     
            }
           }
        });

        return inflater.inflate(R.layout.second_layout, null);
    }
 ...

 @Override
 public void onDestroy(){
    super.onDestroy();
    //Set my toggle button to unchecked status,when leave this fragment 
    myToggleBtn.setChecked(false);
  }

}

The toggle button works fine on my SecondFragment. BUT, if now I press the toggle button to check it(so it changed to checked status), then press physical back button to go back to FirstFragment (onDestroy() is called which set toggle button to unchecked status) , and then come to SecondFragment again, surprisingly, at this moment, the ToggleButton is checked at run time, and I noticed from LogCat, the OnCheckedChangeListener() is invoked at run time too, why?

P.S.: LogCat shows that onDestroy() is called when leaving SecondFragment

Upvotes: 0

Views: 1994

Answers (1)

Mellon
Mellon

Reputation: 38902

After I moved myToggleBtn.setChecked(false); from onDestroy() to onStop(), the problem get solved. Thanks.

Upvotes: 1

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