Title not appearing

That message icon is a float button so to get rid of that you just get rid of the xml and java for the float button. Look in activity_main.xml at the bottom and get rid of this

<android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin" app:srcCompat="@android:drawable/ic_dialog_email"/>

Then in MainActivity.java in the onCreate method, get rid of this

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } });

As for your other question, I would like to see your activity_main.xml, AndroidManifest.xml and your styles.xml in order to attempt to answer. :)