androidx.appcompat.widget.toolbar cannot be cast to android.widget.toolbar

Question

my tollbar display is not showing in app and it is giving this error androidx.appcompat.widget.toolbar cannot be cast to android.widget.toolbar caused by Caused by: java.lang.ClassCastException

My xml toolbar code is

<androidx.appcompat.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/allNotifications_tollbar"
        android:layout_alignParentTop="true"
        android:background="@color/LighterGrayColor"
        android:minHeight="?attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        />



 import android.widget.Toolbar;
    
     private void attachJavaToXML()
        {
            try
            {
                objectDialog =new Dialog(this);
                objectDialog.setContentView(R.layout.please_wait_dialog);
    
                objectToolbar=findViewById(R.id.allNotifications_tollbar);
                objectRecyclerView=findViewById(R.id.allNotifications_RecyclerView);
    
                objectToolbar.inflateMenu(R.menu.all_notifications_menu);
                objectToolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId())
                        {
                            case R.id.allNotifications_item_clear:
                                clearAllNotifications();
                                return true;
                            case R.id.allNotifications_item_goBack:
                                startActivity(new Intent(AllNotifications.this,MainContentPage.class));
                                return true;
                        }
                        return false;
                    }
                });
            }
            catch (Exception e)
            {
                Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
    }

i know there is an issue with import android.widget.Toolbar; so which import should i use??

Answer 1

Since in your layout you are using

<androidx.appcompat.widget.Toolbar
  android:id="@+id/allNotifications_tollbar"
  ../>

in your code you have to import the same class :

import androidx.appcompat.widget.Toolbar

Toolbar objectToolbar;
objectToolbar=findViewById(R.id.allNotifications_tollbar);