Android以编程方式更改导航抽屉菜单项文本

Question

我的应用程序中有新的导航抽屉,我想从代码中动态更改导航视图菜单项标题文本.我看了很多帖子,但我想不通,我怎么能这样做.我怎样才能正确实现这一目标？

MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

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();
    }
});

DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
        this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);

}

activity_main_drawer.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

<group android:checkableBehavior="single">
    <item android:id="@+id/nav_camara" android:icon="@android:drawable/ic_menu_camera"
        android:title="Import" />
    <item android:id="@+id/nav_gallery" android:icon="@android:drawable/ic_menu_gallery"
        android:title="Gallery" />
    <item android:id="@+id/nav_slideshow" android:icon="@android:drawable/ic_menu_slideshow"
        android:title="Slideshow" />
    <item android:id="@+id/nav_manage" android:icon="@android:drawable/ic_menu_manage"
        android:title="Tools" />
</group>

<item android:title="Communicate">
    <menu>
        <item android:id="@+id/nav_share" android:icon="@android:drawable/ic_menu_share"
            android:title="Share" />
        <item android:id="@+id/nav_send" android:icon="@android:drawable/ic_menu_send"
            android:title="Send" />
    </menu>
</item>

Answer 1

您可以通过在MainActivity.java文件中添加以下行以编程方式更改导航菜单项的标题.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ...
    //other stuff here
    ...
    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

    // get menu from navigationView
    Menu menu = navigationView.getMenu();

    // find MenuItem you want to change
    MenuItem nav_camara = menu.findItem(R.id.nav_camara);

    // set new title to the MenuItem
    nav_camara.setTitle("NewTitleForCamera");

    // do the same for other MenuItems
    MenuItem nav_gallery = menu.findItem(R.id.nav_gallery);
    nav_gallery.setTitle("NewTitleForGallery");

    // add NavigationItemSelectedListener to check the navigation clicks
    navigationView.setNavigationItemSelectedListener(this);

}

这对我来说很好.希望它能帮到你.

Answer 2

如果您从导航菜单抽屉列表中重命名或删除项目,请更改以下代码

  NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    if (navigationView != null) {
        Menu menu = navigationView.getMenu();
        menu.findItem(R.id.nav_profile).setTitle("My Account");
        menu.findItem(R.id.nav_mng_task).setTitle("Control Task");
        //menu.findItem(R.id.nav_pkg_manage).setVisible(false);//In case you want to remove menu item
        navigationView.setNavigationItemSelectedListener(this);
    }