小编Lar*_*les的帖子

我无法更改子菜单标题的颜色,请参见下图.

我可以更改NavigationView的背景,字体的颜色和图标的颜色,但我在子菜单标题上找不到答案.

例如

<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="@color/white"
    app:itemBackground="@color/white"
    app:itemIconTint="@color/dark_green"
    app:itemTextColor="@color/dark_green"
    app:headerLayout="@layout/drawer_header"
    app:menu="@menu/drawer" />

这是我的菜单xml:

<group android:checkableBehavior="single">
    <item
        android:checked="true"
        android:icon="@drawable/ic_attachment"
        android:title="@string/nav_item_attachment" />
    <item
        android:icon="@drawable/ic_image"
        android:title="@string/nav_item_images" />
    <item
        android:icon="@drawable/ic_place"
        android:title="@string/nav_item_location" />
</group>

<item android:title="@string/nav_sub_menu">
    <menu>
        <item
            android:icon="@drawable/ic_emoticon"
            android:title="@string/nav_sub_menu_item01" />
        <item
            android:icon="@drawable/ic_emoticon"
            android:title="@string/nav_sub_menu_item02" />
    </menu>
</item>

请指教.:-).

NavigationView子菜单问题

我已经实现了一些带有一些行的RecyclerView,现在我正在尝试使用AlertDialog在用户点击一行时显示一条消息.

我已经在Adapter中成功实现了setOnClickListener但是我无法使AlertDialog工作,系统一直告诉我我不能在ViewHolder中使用AlertDialog.Builder:

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);

我的GitHub代码就在这里

public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    public TextView textView;

    public ViewHolder(View itemView) {
        super(itemView);
        textView = (TextView) itemView;
        itemView.setOnClickListener(this);
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
        alertDialogBuilder.setTitle(null);
        {
            alertDialogBuilder
                    .setMessage("You selected ")
                    .setCancelable(true); // True allows you to use the back button to exit the dialog, false does not
        }
        AlertDialog alertDialog = alertDialogBuilder.create();
        alertDialog.show();
    }