隐藏导航抽屉菜单项-Android
我有一个导航抽屉。调用事件时,我想为用户隐藏一个导航菜单项。我该怎么做隐藏导航抽屉菜单项-Android,android,hide,navigation-drawer,Android,Hide,Navigation Drawer,我有一个导航抽屉。调用事件时,我想为用户隐藏一个导航菜单项。我该怎么做 protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.sliding_menu); if (android.os.Build.VERSION.SDK_INT > 9) { StrictMode.ThreadP
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sliding_menu);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout1);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu1);
navDrawerItems = new ArrayList<NavDrawerItem>();
// adding nav drawer items to array
// Home
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
// Profil
navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
// Prospek
navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
// Announcement
navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1), true,
cariTotal("http://192.168.0.23/api/android/announcement/").toString()));
// Logout
navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
// Recycle the typed array
navMenuIcons.recycle();
//set event
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getApplicationContext(),
navDrawerItems);
mDrawerList.setAdapter(adapter);
// enabling action bar app icon and behaving it as toggle button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.string.app_name,
R.string.app_name
){
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
//mDrawerList.bringToFront();
//mDrawerLayout.requestLayout();
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
displayView(0);
}
}
private void displayView(int position) {
// update the main content by replacing fragments
android.app.Fragment fragment = null;
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = new ProfilFragment();
break;
case 2:
fragment = new ProspekFragment();
break;
case 3:
fragment = new AnnouncementFragment();
break;
case 4:
Logout();
break;
default:
break;
}
if (fragment != null) {
android.app.FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("SlidingMenu", "Error in creating fragment");
}
}
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.滑动菜单);
如果(android.os.Build.VERSION.SDK_INT>9){
StrictMode.ThreadPolicy policy=新建StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(策略);
}
mTitle=mDrawerTitle=getTitle();
//加载幻灯片菜单项
navMenuTitles=getResources().getStringArray(R.array.nav\u抽屉\u项目);
//参考资料中的导航抽屉图标
navMenuIcons=getResources()
.obtainTypedArray(R.array.nav_drawer_图标);
mDrawerLayout=(抽屉布局)findViewById(R.id.抽屉布局1);
mDrawerList=(ListView)findViewById(R.id.list\u slidemenu1);
navDrawerItems=新的ArrayList();
//将导航抽屉项添加到阵列
//家
添加(新的NavDrawerItem(navMenuTitles[0],navMenuIcons.getResourceId(0,-1));
//Profil
添加(新的NavDrawerItem(navMenuTitles[1],navMenuIcons.getResourceId(1,-1));
//普罗斯佩克
添加(新的NavDrawerItem(navMenuTitles[2],navMenuIcons.getResourceId(2,-1));
//公告
添加新的navDrawerItems(navMenuTitles[3],navMenuIcons.getResourceId(3,-1),true,
总计(”http://192.168.0.23/api/android/announcement/);
//注销
add(新的NavDrawerItem(navMenuTitles[4],navMenuIcons.getResourceId(4,-1));
//回收类型化数组
navMenuIcons.recycle();
//设置事件
setOnItemClickListener(新的SlideMenuClickListener());
//设置导航抽屉列表适配器
适配器=新的NavDroperListAdapter(getApplicationContext(),
纳维特姆斯);
mDrawerList.setAdapter(适配器);
//启用操作栏应用程序图标并将其作为切换按钮
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerToggle=新操作BarDrawerToggle(此,mDrawerLayout,
R.string.app_名称,
R.string.app\u名称
){
公共无效onDrawerClosed(视图){
getSupportActionBar().setTitle(mTitle);
//调用onPrepareOptions菜单()以显示操作栏图标
无效操作菜单();
}
打开图纸上的公共空白(视图抽屉视图){
getSupportActionBar().setTitle(mDrawerTitle);
//mDrawerList.bringToFront();
//mDrawerLayout.requestLayout();
//调用onPrepareOptions菜单()隐藏操作栏图标
无效操作菜单();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
如果(savedInstanceState==null){
//第一个导航项目的首次显示视图
显示视图(0);
}
}
私有void显示视图(内部位置){
//通过替换片段更新主要内容
android.app.Fragment Fragment=null;
开关(位置){
案例0:
fragment=新的HomeFragment();
打破
案例1:
片段=新的ProfilFragment();
打破
案例2:
fragment=新ProspekFragment();
打破
案例3:
fragment=新的AnnouncementFragment();
打破
案例4:
注销();
打破
违约:
打破
}
if(片段!=null){
android.app.FragmentManager FragmentManager=getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container,fragment).commit();
//更新所选项目和标题,然后关闭抽屉
mDrawerList.setItemChecked(位置,true);
mDrawerList.setSelection(职位);
setTitle(导航工具[位置]);
mDrawerLayout.closeDrawer(mDrawerList);
}否则{
//创建片段时出错
Log.e(“滑动菜单”,“创建片段时出错”);
}
}
我想在索引2处隐藏导航抽屉菜单项。怎么做
更新
我的导航抽屉中有5个菜单项,我想在调用某个事件时隐藏其中一个。您可以通过以下代码删除listview的第二项:
navDrawerItems.remove(2);
((BaseAdapter)adapter).notifyDataSetChanged();
隐藏/显示导航项目 在NavDrawerListAdapter中进行如下更改:
public class MyListAdapter extends BaseAdapter {
Context context;
ArrayList<ItemListModel> listMenuItem;
ArrayList<ItemListModel> listMenuItem1;
int hideViewIndex = -1;
public MyListAdapter(Context context, ArrayList<ItemListModel> listMenuItem) {
this.context = context;
this.listMenuItem = listMenuItem;
listMenuItem1=new ArrayList<ItemListModel>(listMenuItem);
}
@Override
public int getCount() {
return listMenuItem.size();
}
@Override
public Object getItem(int position) {
return listMenuItem.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
private class ViewHolder
{
private ImageView imgLogo;
private TextView txtItemName;
}
public void hideView(int pos)
{
listMenuItem.remove(pos);
notifyDataSetChanged();
}
public void showView(int pos)
{
listMenuItem.add(pos, listMenuItem1.get(pos));
notifyDataSetChanged();
}
@SuppressLint("InflateParams")
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if(convertView == null)
{
LayoutInflater myLayoutInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = myLayoutInflater.inflate(R.layout.activity_item_list, null);
viewHolder = new ViewHolder();
viewHolder.imgLogo = (ImageView) convertView.findViewById(R.id.imgLogo);
viewHolder.txtItemName = (TextView) convertView.findViewById(R.id.txtItemName);
convertView.setTag(viewHolder);
}
else
{
viewHolder = (ViewHolder) convertView.getTag();
}
ItemListModel itemListModel = listMenuItem.get(position);
viewHolder.imgLogo.setImageDrawable(itemListModel.getImageLogo());
viewHolder.txtItemName.setText(itemListModel.getStrItemName());
return convertView;
}
adapter.hideView(2);
//adapter.showView(2);
这将作为setInvisibility(GONE)工作:
导航视图导航视图
mapIntentActivity = getIntent();
navItemString = mapIntentActivity.getStringExtra("success");
if(navItemString != null) {
navigationView = (NavigationView) findViewById(R.id.nav_view);
Menu nav_Menu = navigationView.getMenu();
nav_Menu.findItem(R.id.nav_car).setVisible(false);
}
科特林版本
val navigationView: NavigationView = findViewById(R.id.nav_view) as NavigationView
val nav_Menu: Menu = navigationView.getMenu()
nav_Menu.findItem(R.id.nav_stock).setVisible(false)
您的意思是删除抽屉布局列表视图中的第二项吗?不,只是隐藏它。因为我想在以后再次展示,请您添加更多关于这段代码如何帮助的信息。当您需要在运行时隐藏特定的导航菜单项时,这段代码可以帮助您。示例:当用户登录时。它在导航抽屉中显示配置文件菜单,否则不显示。使用此代码,您可以在导航抽屉中隐藏和显示菜单项。这是第三个项目代码。但是如何使它“消失”而不是“不可见”@kakumanusiakrishna:看看Desmond Yao的答案。它实际上是将其从列表中删除,而不是使其“消失”。但这是通往成功的唯一途径take@Kakumanusivakrishna.setVisible(false)将仅保留项目
mapIntentActivity = getIntent();
navItemString = mapIntentActivity.getStringExtra("success");
if(navItemString != null) {
navigationView = (NavigationView) findViewById(R.id.nav_view);
Menu nav_Menu = navigationView.getMenu();
nav_Menu.findItem(R.id.nav_car).setVisible(false);
}
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
Menu menu =navigationView.getMenu();
MenuItem target = menu.findItem(R.id.nav_target);
target.setVisible(false);
//hide logout menu item when the user is not loggrd in
//Checking the condition whether the user is logged in or not
if (!SharedPrefManager.getmInstance(this).isLoggedIn()){
Menu nav_Menu = navigationView.getMenu();
nav_Menu.findItem(R.id.nav_logout).setVisible(false);
}
//SharedPrefManager .java class where we define the isLoggedIn Method()
import android.content.Context;
import android.content.SharedPreferences;
import com.motortrade.motortrade.t_Model.User;
public class SharedPrefManager {
private static final String SHARED_PREF_NAME = "my_shared_pref";
private static SharedPrefManager mInstance;
private Context mCtx;
private SharedPrefManager(Context mCtx){
this.mCtx = mCtx;
}
public static synchronized SharedPrefManager getmInstance(Context mCtx){
if (mInstance == null){
mInstance = new SharedPrefManager(mCtx);
}
return mInstance;
}
public boolean isLoggedIn(){
SharedPreferences preferences = mCtx.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
return preferences.getInt("user_id", -1) != -1;
}
val navigationView: NavigationView = findViewById(R.id.nav_view) as NavigationView
val nav_Menu: Menu = navigationView.getMenu()
nav_Menu.findItem(R.id.nav_stock).setVisible(false)