<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");
}
});