setSupportActionBar (androidx.appcompat.widget.Toolbar) in AppCompatActivity cannot be applied

Question

An error showing incompatible types Android widget toolbar cannot be converted in Java compiler while working on Android Studio.

    Toolbar toolbar = (Toolb         


        

Answer 1

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_detail);

    Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
    setSupportActionBar(toolbar); //No Problerm

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}

we must import androidx.appcompat.widget.Toolbar; don't import android.widget.Toolbar;