package com.example.flickrbrowser2; import android.util.Log; import androidx.appcompat.widget.Toolbar; import androidx.appcompat.app.ActionBar; import androidx.appcompat.app.AppCompatActivity; public class BaseActivity extends AppCompatActivity { private static final String TAG = "BaseActivity"; static final String FLICKR_QUERY = "FLICKR_QUERY"; static final String PHOTO_TRANSFER = "PHOTO_TRANSFER"; void activateToolBar(boolean enableHome) { Log.d(TAG, "activateActionBar: starts"); ActionBar actionbar = getSupportActionBar(); if (actionbar == null) { Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); if (toolbar != null) { setSupportActionBar(toolbar); actionbar = getSupportActionBar(); } } if (actionbar != null) { actionbar.setDisplayHomeAsUpEnabled(enableHome); } } }