Toolbar

<androidx.appcompat.widget.Toolbar
    android:background="#ffff00"
    app:navigationIcon="@drawable/baseline_close_24"
    app:title="主标题"
    android:id="@+id/tb"
    app:titleTextColor="#ff0000"
    app:subtitle="子标题"
    app:subtitleTextColor="#ff0000"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"

        android:layout_gravity="center"
        ></TextView>

Toolbar toolbar = findViewById(R.id.tb);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Log.e("leo","onClick：被点击了");
    }
});