android - 带有导航组件的顶部应用栏和底部应用栏的两个不同菜单

Answer 1

Just use onCreateOptionsMenu() for the Toolbar as usual: (Kotlin)

override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.menu_first, menu)
        return super.onCreateOptionsMenu(menu)
    }

Then declare the Toolbar inside onCreate() and use setSupportActionBar():

val toolbar = findViewById<Toolbar>(R.id.myToolbar)
setSupportActionBar(toolbar)

And after that, replaceMenu() will do the trick: (Inside onCreate())

val bottomBar = findViewById<BottomAppBar>(R.id.bottomAppBar)
bottomBar.replaceMenu(R.menu.menu_main)

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Note that if you wanted to use BottomSheetFragment for the NavigationView opening, you'll need setSupportActionBar in order to set menus for the BottomAppBar and I couldn't still find a way to fix this.

Answer 2

要拥有多个 Toolbar（或 BottomAppBar），您必须手动为另一个充气。当您调用setSupportActionBar()和onCreateOptionsMenu()时，您实际上是在这样做：

private boolean inflateBottomAppBar() {
    BottomAppBar bottomAppBar = findViewById(R.id.bottomAppBar);
    Menu bottomMenu = bottomAppBar.getMenu();
    getMenuInflater().inflate(R.menu.menu_bottom, bottomMenu);
    for (int i = 0; i < bottomMenu.size(); i++) {
        bottomMenu.getItem(i).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem menuItem) {
                return onOptionsItemSelected(menuItem);
            }
        });
    }
    return super.onCreateOptionsMenu(menu);
}

其中R.id.bottomAppBar是 BottomAppBar 的 id，而 R.menu.menu_bottom是菜单项的 id。

在你为主工具栏充气后在你的onCreateOptionsMenu()中调用这个方法，你会很高兴的。所有的项目点击都将由onOptionsItemSelected()方法正常处理。

如果您正在制作两个或更多常规工具栏，这也将起作用。