android - 返回主 Activity 后取消选中抽屉导航中的 MenuItem

Question

抽屉导航有一个小问题。返回主要 Activity 后，我不想“检查”任何内容，这里是关于我的问题的更多信息:

当我开始一项 Activity 时，我有这样的菜单:

很好 :) 当我单击“用户配置文件”或其他菜单项时，我正在打开新 Activity 。我在这个“新 Activity ”中没有任何菜单，只有返回按钮，所以我要返回主要 Activity 。这是一个问题，当我返回主 Activity 并打开抽屉导航时，它看起来像:

要取消选中我之前打开的这个菜单项，我需要做什么？

//编辑抽屉导航代码:

mToolbar = findViewById(R.id.toolbar);
    setSupportActionBar(mToolbar);

    ActionBar actionbar = this.getSupportActionBar();
    actionbar.setDisplayHomeAsUpEnabled(true);
    actionbar.setHomeAsUpIndicator(R.drawable.ic_menu_black_24dp);

    mDrawerLayout = findViewById(R.id.drawer_layout);
    NavigationView navigationView = findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(
            new NavigationView.OnNavigationItemSelectedListener() {
                @Override
                public boolean onNavigationItemSelected(MenuItem menuItem) {
                    // close drawer when item is tapped
                    mDrawerLayout.closeDrawers();
                    switch (menuItem.getItemId()) {
                        case android.R.id.home:
                            mDrawerLayout.openDrawer(GravityCompat.START);
                            return true;
                        case R.id.action_user:
                            //Save info about clicked menu item to open correct activity when "onDrawerClosed" listener will be call
                            choseIntentFromDrawerLayout= EventContract.EventEntry.MENU_USER_PROFIL;
                            return true;
                        case R.id.action_settings:
                            choseIntentFromDrawerLayout=EventContract.EventEntry.MENU_SETTINGS;
                            return true;
                        case R.id.action_about:
                            choseIntentFromDrawerLayout= EventContract.EventEntry.MENU_ABOUT;
                            return true;
                        case R.id.action_log_out:
                            choseIntentFromDrawerLayout= EventContract.EventEntry.MENU_LOG_OUT;
                            return true;
                            default:
                                choseIntentFromDrawerLayout= EventContract.EventEntry.MENU_NOTHING;
                    }

                    //UNCHECK? - NO WORKING
                    if(menuItem.isChecked()){
                        menuItem.setChecked(false);
                    }
                    return true;

                }
            });

    mDrawerLayout.addDrawerListener(
            new DrawerLayout.DrawerListener() {
                @Override
                public void onDrawerSlide(View drawerView, float slideOffset) {
                    // Respond when the drawer's position changes
                }

                @Override
                public void onDrawerOpened(View drawerView) {
                    // Respond when the drawer is opened
                    choseIntentFromDrawerLayout= EventContract.EventEntry.MENU_NOTHING;
                }

                @Override
                public void onDrawerClosed(View drawerView) {
                    // Respond when the drawer is closed
                    switch (choseIntentFromDrawerLayout) {
                        case EventContract.EventEntry.MENU_USER_PROFIL:
                            Intent intentUser = new Intent(CatalogActivity.this,UserActivity.class);
                            mExtraInfoHelp.putWindsurferToIntent(intentUser,mWindsurfer,getApplicationContext());
                            startActivity(intentUser);
                            break;
                        case EventContract.EventEntry.MENU_SETTINGS:
                            Intent intentSettings = new Intent(CatalogActivity.this,SettingsActivity.class);
                            startActivity(intentSettings);
                            break;
                        case EventContract.EventEntry.MENU_ABOUT:
                            Intent intentAbout = new Intent(CatalogActivity.this,AboutActivity.class);
                            startActivity(intentAbout);
                            break;
                        case EventContract.EventEntry.MENU_LOG_OUT:
                            AuthUI.getInstance().signOut(CatalogActivity.this);
                            break;
                        case EventContract.EventEntry.MENU_NOTHING:
                            break;
                    }

                }

                @Override
                public void onDrawerStateChanged(int newState) {
                    // Respond when the drawer motion state changes
                }
            }
    );

Answer 1

我会取消选中“onPause”或“onResume”方法中的菜单项。我假设您对 menuItem.isChecked 的调用返回 false，因为 android 会在调用监听器后将您的 menuItem 设置为已选中。 arsent 的回答显示了如何取消选中菜单项:How to uncheck checked items in Navigation View?也可以取消选中 onDrawerClosed 监听器中的菜单项:此代码有效:

@Override
                public void onDrawerClosed(View drawerView) {
                    //Solution:
                    int size = navigationView.getMenu().size();
                    for (int i = 0; i < size; i++) {
                        navigationView.getMenu().getItem(i).setChecked(false);
                    }
                    // Respond when the drawer is closed
                    switch (choseIntentFromDrawerLayout) {
                        case EventContract.EventEntry.MENU_USER_PROFIL:
                            Intent intentUser = new Intent(CatalogActivity.this,UserActivity.class);
                            mExtraInfoHelp.putWindsurferToIntent(intentUser,mWindsurfer,getApplicationContext());
                            startActivity(intentUser);
                            break;
                        case EventContract.EventEntry.MENU_SETTINGS:
                            Intent intentSettings = new Intent(CatalogActivity.this,SettingsActivity.class);
                            startActivity(intentSettings);
                            break;
                        case EventContract.EventEntry.MENU_ABOUT:
                            Intent intentAbout = new Intent(CatalogActivity.this,AboutActivity.class);
                            startActivity(intentAbout);
                            break;
                        case EventContract.EventEntry.MENU_LOG_OUT:
                            AuthUI.getInstance().signOut(CatalogActivity.this);
                            break;
                        case EventContract.EventEntry.MENU_NOTHING:
                            break;
                    }

                }