更改导航抽屉中菜单项的文本颜色 [英] Changing text color of menu item in navigation drawer

问题描述

我正在尝试为我的应用添加夜间主题，但我浪费了将近三个小时，只是试图让导航抽屉中的文本和图标随着深色背景变白.这是我尝试在 MainActivity.java 中的 onCreate() 中执行此操作的方法:

I'm trying to add a night theme for my app and I've wasted nearly three hours just trying to make the text and icons in my navigation drawer turn white along with the dark background. Here is the way I'm trying to go about doing this in onCreate() in MainActivity.java:

navigationView = (NavigationView) findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

    // This method will trigger onItemClick of navigation menu
    @Override
    public boolean onNavigationItemSelected(MenuItem menuItem) {

        // Checking if the item is in checked state or not, if not make it in checked state
        if (menuItem.isChecked())
            menuItem.setChecked(false);
        else menuItem.setChecked(true);

        if (nightMode == 0) {
            SpannableString spanString = new SpannableString(menuItem.getTitle().toString());
            spanString.setSpan(new ForegroundColorSpan(Color.WHITE), 0, spanString.length(), 0); // fix the color to white
            menuItem.setTitle(spanString);
        }

nightMode 布尔值无关紧要，因为它有效.当夜间模式设置为开启 (0) 时，导航抽屉中选择的任何菜单项都会变为白色.但是，只有在选择每个项目时才会发生这种情况，这显然很不方便.这是我的 drawer_dark.xml:

The nightMode boolean is irrelevant because it works. When night mode is set to on (0), whatever menu item is selected in the navigation drawer turns white. However, that only happens when each item is selected which is obviously inconvenient. Here is my drawer_dark.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/unitone"
            android:checked="true"
            android:icon="@drawable/one_white"
            android:title="Classical Period" />
        <item
            android:id="@+id/unittwo"
            android:checked="false"
            android:icon="@drawable/two_white"
            android:title="Postclassical Period" />
        <item
            android:id="@+id/unitthree"
            android:checked="false"
            android:icon="@drawable/three_white"
            android:title="Early Modern Era" />
        <item
            android:id="@+id/unitfour"
            android:checked="false"
            android:icon="@drawable/four_white"
            android:title="Dawn of Industrial Age" />
        <item
            android:id="@+id/unitfive"
            android:checked="false"
            android:icon="@drawable/five_white"
            android:title="Modern Era" />
    </group>
</menu>

我在每个项目的透明背景上使用白色图标，但它们在导航抽屉的黑色背景上显示为黑色.我已经尝试寻找一种 xml 解决方案来更改文本的颜色，但我正在挠头，因为我不知道为什么会忽略这一点.

I'm using white icons on a transparent background for each item, yet they show up as black on the black background of the navigation drawer. I've tried looking for an xml solution to changing the color of the text and I'm scratching my head because I don't know why this was overlooked.

有人可以为我提供动态解决方案来实现我的目标吗?感谢所有帮助，谢谢！

Can someone offer me a dynamic solution in getting what I'm trying to achieve? All help is appreciated, thank you!

我没有使用第三方库，它是支持库中提供的 NavigationView.这是 XML 布局:

I am not using a third party library, it's the NavigationView provided in the support library. Here's the XML layout:

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:elevation="7dp"
    tools:context=".MainActivity"
    android:fitsSystemWindows="true" >

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <FrameLayout
            android:id="@+id/container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/ColorDark" />

        <include layout="@layout/toolbar" />

    </FrameLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:background="#000"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/header"
        app:menu="@menu/drawer" />

</android.support.v4.widget.DrawerLayout>

推荐答案

 <android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:background="#000"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/header"
        app:itemTextColor="your color"
        app:menu="@menu/drawer" />

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