How to add "UP" back button in fragment (Fragment to Activity)

Question

I want to go from fragment to activity using back button using toolbar back icon.

The fragment is my navigation drawer item & activity is my MainActivity.

How do I do it?

Answer 1

You can use app:navigationIcon="?attr/homeAsUpIndicator" for that back navigation icon.

 <android.support.v7.widget.Toolbar
            android:id="@+id/toolbarId"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:navigationIcon="?attr/homeAsUpIndicator"/>

For navigation:

Toolbar toolbar = (ToolBar) getActivity().findViewById(R.id.toolbarId);

toolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            getActivity().onBackPressed();
        }
    });

Answer 2

Call this method in your fragment onCreateView

public void showBackButton() {
if (getActivity() instanceof ActionBarActivity) {
    ((ActionBarActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
}

Answer 3

It might help in case if you want to come back from fragment to previous location.

Put this in your class with navController.

  @Override
public boolean onSupportNavigateUp() {
    navController.navigateUp();
    return super.onSupportNavigateUp();
}

don't forget implement relevant dependency such as navigation and navigation UI.

Answer 4

Try this worked for me :

1. in XML:

   <android.support.v7.widget.Toolbar
    android:id="@+id/profileToolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
   

2. Create an back arrow icon in drawable folder. Name it 'ic_back_button'. Not sure how :-
   just right click on drawable > new > ImageAsset > Clip Art > Search back > select > OK > Finish (don't forget to change the name).

3. then Inside your fragment in onCreateView :

       Toolbar toolbar = view.findViewById(R.id.profileToolbar);
       toolbar.setNavigationIcon(R.drawable.ic_back_button);
       toolbar.setNavigationOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
         getActivity().onBackPressed();
       }
       });