Return back to specific fragment of Activity-A from another Activity

Question

I open the

Message-Fragment

from

Activity-A

and then open the

Camera-Fragment

from

Message-Fragment

. Now current fragment is

Camera-Fragment

and i have media-slider on it. Now I have two options, one is

ImagePreview-Fragment

that is opened if I click the image item on media-slider. Other is

VideoPreview-Activity

that is opened if click the video item on media-slider. So there is one condition of clicking video-item. If I click the video-item on media-slider and video size is bigger than 10 MB, I open the

VideoTrim-Activity

and when trim is completed i call the

VideoPreview-Activity

.

I'm sending a media from

VideoPreview-Activity

or

ImagePreview-Fragment

. So when I send the media I want to return back to the

Message-Fragment

with data.

How can I return back to

Message-Fragment

from

VideoPreview-Activity

(opened from Camera-Fragment) and

VideoPreview-Activity

(opened from

VideoTrim-Activity

). Also if you can help me about how to return back from

ImagePreview-Fragment

to

Message-Fragment

I would be much appreciated. These are seperated questions. Hope you can help.

I open the fragments with adding to backstack

addToBackStack(fragmentTag)

.

Edited : VideoPreview-Fragment must be VideoPreview-Activity
and VidoTrim-Fragment must be VideoTrim-Activity. these are the activities. like you see on the image.

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Answer 1

If I understand everything correctly I think I have a solution. I will ignore all other aspects of the navigation and just focus on the fact you want to go from VideoPreviewActivity to the MainActivity and adjust the fragment stack, and that this is being triggered from a done button (or something similar) but NOT the back button.

The simple way would be to use the activity result functions startActivityForResult which would allow you to use a onActivityResult function in the main activity to pass the information back. However you may potentially navigate to the VideoPreviewActivity via the VideoTrimActivity so you would have to pass this information back through two activities which would be a bit messy.

So my proposed solution has a few steps.

Instead of calling finish() on the VideoPreviewActivity fire an intent to create the MainActivity

Intent intent = new Intent(context, HomeActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.putExtra()//Add your return data here
startActivity(intent)

Instead of starting a new MainActivity this will return you to the previous one and finish all the activities sat above it in the task task.

Add this function to the MainActivity.

@Override
protected void onNewIntent(Intent intent) {
    setIntent(intent);
}

Then in the onStart function you can check your intent to see if there is data in there returned from VideoPreview and remove the fragments you no longer need.

if (getIntent().hasExtra(YOUR_DATA)) {
        if (getSupportFragmentManager().getBackStackEntryCount() > 0)
            getSupportFragmentManager(). popBackStackImmediate("MESSAGE_TAG", 0);
}

Where "MESSAGE_TAG" is the tag used in the ft.addToBackStack("MESSAGE_TAG") call.

This will clear all of the fragments with an addToBackStack in the transaction. The MessageFragment will start its lifecycle calls again and you can access the data from

getActivity().getIntent()

Return back to specific fragment of Activity-A from another Activity

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