How to do something on back press instead of pop from backStack just for one fragment and still should able to work normally for other fragments?

Question

I have an app in which there is a FramLayout with id frame_container.

My onCreate looks like this :-

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        hideKeyboard();
        editText = findViewById(R.id.editText4);
        editText.setSelection(editText.getText().toString().length());
        textView = findViewById(R.id.textView3);
        frameLayout = findViewById(R.id.frame_container);
        frameLayout.setVisibility(View.INVISIBLE);
        FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
        fragmentTransaction.add(R.id.frame_container,new advancefunction());
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.commit();
        frameLayout.animate().translationXBy(1000f);


    }

When I press a button it just brings my fragment with animation by using function :-

@Override
    public void advanceButton(View view) {

        frameLayout.setVisibility(View.VISIBLE);
        frameLayout.animate().translationXBy(-1000f).setDuration(500);
    }

So when I press backButton it goes to previous state but instead I want it to get invisible and translationXby(1000f) any suggestions how to achieve it as i am a new to android and still learning so a help would be great.

now it's not duplicate @arbuz a help would be great – SHOBHIT SRIVASTAVA 17BIT0292 Jun 06 '18 at 17:58 — SHOBHIT SRIVASTAVA 17BIT0292, Jun 06 '18 at 17:58

LMaker · Answer 1 · 2018-06-06T17:51:16.813

0

Just use onBackPressed function, who catches the listener from the back key inside your Activity

 @Override
    public void onBackPressed() {
       //put your code here
    }

or

Use this one if you`re inside a Fragment

@Override
    public void onDetach() {
        super.onDetach();
        PUT YOUR CODE HERE
    }

edited Jun 06 '18 at 17:51

answered Jun 06 '18 at 17:47

LMaker

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where should I place onBackPressed function ? – SHOBHIT SRIVASTAVA 17BIT0292 Jun 06 '18 at 17:48
put inside your Activity – LMaker Jun 06 '18 at 17:49
Refer to [this](https://stackoverflow.com/a/24881908/7540393) if you want to do it inside a fragment – Arthur Attout Jun 06 '18 at 17:49
I dont think this is the best approach, I`ll edit my answer – LMaker Jun 06 '18 at 17:50
`onDetach` will do the job – LMaker Jun 06 '18 at 17:52
thing is that my FrameLayout variable is in MainActivity.java and my fragment is advaancefunction.java now where to put and how to use framelayout variable ? @LMaker – SHOBHIT SRIVASTAVA 17BIT0292 Jun 06 '18 at 17:54
I think you should override onbackpress function inside your main activity by sorting out your target fragment – Aliy Jun 06 '18 at 18:00
its really confuse to be honest, Can you provide your github repo or something? – LMaker Jun 06 '18 at 18:19

score 0 · Answer 2 · answered Jun 06 '18 at 18:13

0

Try it:

@Override
public void onBackPressed() {
    int count = getFragmentManager().getBackStackEntryCount();
    if (count == 0) {
        super.onBackPressed();
    } else getFragmentManager().popBackStack();
}

answered Jun 06 '18 at 18:13

Abner Escócio

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How to do something on back press instead of pop from backStack just for one fragment and still should able to work normally for other fragments?

2 Answers2