android – 导航视图中的自定义菜单项大小和文本大小

我在导航视图中使用代码来自定义文本高度和行高,它适用于api21,但是相同的代码在api 16中不起作用.我怎样才能使它工作？

码：

创建一个样式并使用app：theme将其应用于NavigationView

<style name="NavigationViewStyle">
     <item name="android:textSize">20sp</item> <!-- menu item text size-->
     <item name="android:listPreferredItemHeightSmall">40dp</item><!-- menu item height-->
</style>

然后,使用app：theme将此样式应用于NavigationView

<android.support.design.widget.NavigationView
       ...
       ...    
        app:theme="@style/NavigationViewStyle"
       ...
       ...


</android.support.design.widget.NavigationView>

解决方法

在代码中,您可以使用此代码自定义文本视图.试试看,让我知道.

private final ArrayList<View> mMenuItems = new ArrayList<>();
    final Menu navMenu = navigationView.getMenu();
    // Install an OnGlobalLayoutListener and wait for the NavigationMenu to fully initialize
    navigationView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            // Remember to remove the installed OnGlobalLayoutListener
            navigationView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            // Loop through and find each MenuItem View
            for (int i = 0; i < navMenu.size(); i++) {
                final String id = "nav_menuItem" + (i);
                final MenuItem item = navMenu.findItem(getResources().getIdentifier(id,"id",getPackageName()));
                navigationView.findViewsWithText(mMenuItems,item.getTitle(),View.FIND_VIEWS_WITH_TEXT);
            }
            // Loop through each MenuItem View and apply your custom Typeface

            for (final View menuItem : mMenuItems) {
                ((TextView) menuItem).setTypeface(fontLight,Typeface.norMAL);
            }

        }
    });