Android Action Bar Tabs, Styling the Icon and Text

问题:

Firstly, there is the image of my current tab bar

What I want is either aligning the images to very left, while keeping the text centered or moving the images on top of the text centered.

Here is how I add the texts:

var tab = this.ActionBar.NewTab ();            
tab.SetText (tabText);
tab.SetIcon (iconResourceId);

Here is my relevant style.xml entries:

<style name="Theme.Discover" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/MyActionBar</item>
    <item name="android:actionBarTabStyle">@style/MyActionBarTabStyle</item>
    <item name="android:actionBarTabTextStyle">@style/MyActionBarTabText</item>
    <item name="android:actionMenuTextColor">#ffffff</item>
    <item name="android:windowBackground">@drawable/bg</item>
</style>

<style name="MyActionBarTabStyle" parent="@android:style/Widget.Holo.Light.ActionBar.TabView">
    <item name="android:background">@drawable/action_tab_selector</item>
</style> 

<!-- ActionBar tabs text styles -->
<style name="MyActionBarTabText"
       parent="@android:style/Widget.Holo.ActionBar.TabText">
    <item name="android:textColor">#ffffff</item>
</style>

I can understand java code too so if you are not familiar with Xamarin, I still appreciate the java examples&answers.

回答1:

My solution isn't perfect, but to move the icons above the text here is what I have so far, which might be able to help you.

TabLayout.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/tab_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:color/transparent" />
    <TextView
        android:id="@+id/tab_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

MainActivity.cs

 void AddTabToActionBar(int labelResourceId, int iconResourceId)
        {
            var tab = this.ActionBar.NewTab();
            tab.SetCustomView(Resource.Layout.Tablayout);
            tab.CustomView.FindViewById<ImageView>(Resource.Id.tabImage).SetImageResource(iconResourceId);
            tab.CustomView.FindViewById<TextView>(Resource.Id.tabText).SetText(labelResourceId);
            tab.TabSelected += TabOnTabSelected;
            ActionBar.AddTab(tab);

        }

回答2:

I managed to do it successfully. Here is the xml I used:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:p1="http://schemas.android.com/apk/res/android"
    p1:minWidth="15px"
    p1:minHeight="15px"
    p1:layout_width="wrap_content"
    p1:layout_height="wrap_content"
    p1:id="@+id/tabRelative"
    p1:gravity="center">
    <ImageView
        p1:src="@drawable/discover_icon_nightlife"
        p1:layout_width="20dp"
        p1:layout_height="20dp"
        p1:id="@+id/tabImage"
        p1:layout_centerHorizontal="true"
        p1:scaleType="centerInside"
        p1:layout_marginTop="4dp"
        p1:paddingTop="1dp" />
    <TextView
        p1:text="Menu"
        p1:layout_width="wrap_content"
        p1:layout_height="wrap_content"
        p1:id="@+id/tabText"
        p1:layout_centerHorizontal="true"
        p1:layout_below="@+id/tabImage"
        p1:paddingTop="2dp" />
</RelativeLayout>

And I setted it as custom view to my ab like goober_nuts answer suggests.

It wasn't as good as I wanted it to be. I would also want to change the height of the tabs but haven't managed to do it. Here is the picture of the last look: