Android中标题栏文本的居中对齐

<?xml version="1.0" encoding="utf-8"?><androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

   <TextView
        android:id="@+id/toolbar_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Title"
        android:textColor="@android:color/white"
        android:textSize="20sp"
        android:textStyle="bold" />

</androidx.appcompat.widget.Toolbar>

    android:id="@+id/toolbar"
    layout="@layout/toolbar_center_title" />

import androidx.appcompat.widget.Toolbar;

// ...

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

    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    // ...
}

TextView toolbarTitle = findViewById(R.id.toolbar_title);
toolbarTitle.setText("New Title");