CODEWITHSUNDEEP
androidandroid-fragments
shadygoneinsane
shadygoneinsane

Reputation: 2252

Removing fragment

When i try to remove the fragment, the if check is not working correctly My code is

public void onClick(View v) {
switch (v.getId()) {
case R.id.vehicle_button:

if(getSupportFragmentManager().findFragmentById(R.id.relative_tread_fragment).isVisible()){

getSupportFragmentManager().beginTransaction().remove(getSupportFragmentManager().findFragmentById(R.id.relative_tread_fragment)).commit();
}
flag = true;
break;

case R.id.trailer_button:
flag = false;
break;

case R.id.button_search:

if (VRN.contains(actv.getText().toString()) && flag == true) {
getSupportFragmentManager().beginTransaction().replace(R.id.relative_tread_fragment, fragment1).commit();
}
else if (VRN.contains(actv.getText().toString()) && flag == false) 
{
getSupportFragmentManager().beginTransaction().replace(R.id.relative_tread_fragment, fragment2).commit();
}
else {
flag = true;
Custom_Dialog(v);
}

i am trying to remove if any fragment is already present, but if there is no fragment, then that if block which checks if any fragment is there doesn't work and the app tries to remove the fragment which is not there and the app crashes

any suggestions how i should chk if there is a fragment or not ?

Upvotes: 0

Views: 92

Answers (3)

Want2bExpert
Want2bExpert

Reputation: 527

Try this;

  • create a Boolean type global variable
  • use that variable to check if the fragment is visible or not e.g.
    • set boolean variable to true, fragment is visible
    • else variable is false, fragment is hidden.

Upvotes: 0

Smashing
Smashing

Reputation: 1710

You can use this to check whether a certain fragment is inside a certain holder layout:

Fragment yourFrag = getSupportFragmentManager().findFragmentById(R.id.yourFragmentHolderView);
        return yourFrag != null && yourFrag instanceof whateverFragment;

You can then use methods like isVisible() etc on that fragment and remove it if you want to!.

So for example, I have an Activity which contains an inbox OR outbox fragment. If I want to know which one is active I use one of the following methods:

public boolean checkIsInbox() {
        Fragment inboxFrag = getSupportFragmentManager().findFragmentById(LIST_FRAG_HOLDER_ID);
        return inboxFrag != null && inboxFrag instanceof InboxListFragment;
    }

    public boolean checkIsOutbox() {
        Fragment outboxFrag = getSupportFragmentManager().findFragmentById(LIST_FRAG_HOLDER_ID);
        return outboxFrag != null && outboxFrag instanceof OutboxListFragment;
    }

Upvotes: 1

Kaveesh Kanwal
Kaveesh Kanwal

Reputation: 1763

if you can you should use replace instead of remove. If you want to remove all fragments then just empty the back stack like:

 getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

Upvotes: 0

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