How to prevent BottomSheetDialogFragment from dismissing after a navigation to another fragment?

Preventing BottomSheetDialogFragment Dismissal After Navigation

BottomSheetDialogFragments, a versatile UI element in Android, can be frustrating when they dismiss unexpectedly after navigating to another fragment. This article provides a comprehensive guide to preventing this behavior, ensuring a smooth user experience.

Understanding the Issue

BottomSheetDialogFragments, by default, dismiss when a new fragment is pushed onto the back stack. This is a standard behavior designed to maintain a clean UI. However, there are situations where this default behavior is undesirable.

Solutions

Here are the effective solutions to prevent BottomSheetDialogFragment dismissal during navigation:

1. Overriding onActivityResult()

This method allows handling the result of a fragment’s navigation. To prevent dismissal, handle the result appropriately.

```java
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == Activity.RESULT_OK) {
        // Prevent dismissal:
        // 1. Keep the BottomSheetDialogFragment open (if desired).
        // 2. Update the content of the BottomSheetDialogFragment (if required).
    } else if (resultCode == Activity.RESULT_CANCELED) {
        // Handle the case where the navigation resulted in cancellation.
    }
}
```

2. Using the setCancelable() Method

The setCancelable() method controls whether the BottomSheetDialogFragment can be dismissed by clicking outside its bounds or by pressing the back button. By setting it to false, you effectively disable dismissal via these methods.

```java
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setCancelable(false); 
}
```

3. Using a Custom Dialog Fragment

Create a custom dialog fragment that extends DialogFragment and handles the navigation logic itself.

```java
public class MyCustomDialogFragment extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Create the dialog using your custom layout.
        // ...
        return builder.create();
    }

    // Handle navigation logic within this fragment.
    // ...
}
```

4. Managing Fragment Stack

Instead of simply pushing a new fragment, consider using techniques like:

• Adding a new fragment to the existing back stack using addToBackStack(String backStackName)
• Using a dedicated activity for managing the BottomSheetDialogFragment and its associated fragments

Comparison of Solutions

Conclusion

By employing the appropriate strategies, you can effortlessly prevent BottomSheetDialogFragment from dismissing after navigation, creating a more intuitive and user-friendly experience. Choose the solution that best fits your specific application’s requirements and enjoy the benefits of a persistent BottomSheetDialogFragment.