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How to change TextSize and Background Color of a spinner

I want to change my spinner background color and text size of each item in the Spinner, i already have gone through few answers for questions similar to mine but did not get the answer weather we can change the textSize / Background Color of a spinner or not? If anyone have a simple answer, i will be thankful to their reply.
Thanks in advance.

In the strings.xml file create a <string-array name="spinner"> tag.
create <item> tags inside with each entry.
Wrap the text in each item with <![CDATA[ ...raw html... ]]> tag. Put in the formatting information in the raw html part ofcourse.
In the activity,
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.spinner, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
Check the top answer from this post :
Set TextView text from html-formatted string resource in XML
Though this refers to a TextView, it can be modified to be used in a Spinner too.

You'll have to create a custom xml list item for your spinner, something like this list_item_spinner.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:background="#000000"
android:textColor="#FB26A9"
android:padding="10dip"/>
After that use that file in your code as follows
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list_item_spinner, mListData);

How to set correct text size for a Spinner in an Android Toolbar action bar

I followed these instructions to add a spinner to my Toolbar which I am using as the action bar in my Android app.
However the text size is too small.
How do I get the correct text size for an action bar item?
For an example of the correct size see the Action Bar guide.

Try adding the below property to your spinner item, it worked for me :
android:textSize="?attr/actionBarSize"
Hope this helps..
Edit :
Okay, I wasn't telling you about toolbar, let me show an example which might help you :
I assumed in my answer that you have a custom layout defined for spinner, if not then have a look at below code :
Define spinnerLayout.xml file in your layout resource :
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/spinnerLayoutItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="?attr/actionBarSize"
android:textColor="#FF0000"
android:gravity="center"/>
Now, add this in your activity :
.....
Spinner spinner = (Spinner) findViewById(R.id.spinner); // Your spinner id in layout.
.....
ArrayAdapter<String> adapter = ArrayAdapter.createFromResource(this,
R.array.list,R.layout.spinnerLayoutItems);
spinner.setAdapter(adapter);
....
So, I was telling to set your textSize in spinner to "?attr/actionBarSize", you can set it anything, as big as you want.
I am sorry, I by mistake wrote in my previous answer : android:layout_height property, I have corrected it.
Hope this helps....

The accepted answer is wrong. Because ?attr/actionBarSize is 56dp!! Its HUGE for text. The right way to do it is set a style to the TextView as follows:
style="#style/ActionBarTitle"
If you are using AppCompat, you can also use this instead:
style="#style/Base.TextAppearance.Widget.AppCompat.Toolbar.Title"
Both achieve the same result. Styles in Android are repeated if you use support libraries.

spinner text color is white?

I use a Spinner inside a layout.
I use this code:
...
<Spinner
android:layout_width="200dp"
android:layout_height="wrap_content"
android:id="#+id/spin_prod_promo" />
...
Now, when I assign it's adapter I use this code:
...
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(mcontext, android.R.layout.simple_spinner_item, mylabels);
// Drop down layout style
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
Spinner myspinner = (Spinner) V.findViewById(R.id.spin_prod_promo);
// attaching data adapter to spinner
myspinner.setAdapter(dataAdapter);
...
My problem is that, the text color of the spinner is white... thus unreadable, and I do not set it to be this way anywhere in the code.
The "funny thing" is that I use the exact same code in a different activity and the Spinner has the right colors.
The difference is that in this (BAD) case the spinner is located in a fragment.
So if the spinner is in an activity - colors are fine
If the spinner is located on a fragment - color is messed up
I tried using a custom layout for the items of the spinner, but all I succeeded was to make the spinner look disabled. Plus there is always an item in the dropdown that has the color of the background (it can only be seen if I click on it, then I can see the content as long as I keep the click on)
What is going on here?
How can I solve this problem?
Is there something I can do to set the colors of the spinner to be the colors of the theme?
All other widgets in the fragment have normal colors...
Thank you

Context mcontext = getActivity().getApplicationContext(); Is this wrong?
Yes, this is wrong. Only use getApplicationContext() when you know exactly why you are using getApplicationContext(). In particular, never use getApplicationContext() for inflating layouts, as it will screw things up by not using the right theme.
I would delete mcontext entirely, replacing it with getActivity() where needed in your fragment.

just try this..
String[]array={"A","B","C","D"};
ArrayAdapter<String> adapter=new ArrayAdapter<String> (**YourClassName.this**,android.R.layout.simple_list_item_checked,array);
listView.setAdapter(adapter);
NOTE YourClassName.this is your current class name.This code is working for me.

I found the solution. It is to declare a custom layout for the item of the Spinner and use it instead of the default one. And in the custom layout, I set the color of the TextView text to black.
It works this way.
So the code: (promospin_row.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:textColor="#000000"
android:id="#+id/tv_promo_txt"
android:paddingLeft="5dp"
android:paddingTop="5dp" />
</LinearLayout>
and the java code:
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(mcontext, R.layout.promospin_row, R.id.tv_promo_txt, mylabels);
// Drop down layout style
dataAdapter.setDropDownViewResource(R.layout.promospin_row);
Spinner myspinner = (Spinner) V.findViewById(R.id.spin_prod_promo);
// attaching data adapter to spinner
myspinner.setAdapter(dataAdapter);
This way, the item text becomes black. And no other anomalies.
Thank you #CommonsWare for your time

Just use null instead of getApplicationContext().
It must work.
I have tried it and its working.
In your Application you can use null instead of mcontext

I was having this problem too. This is not a solution but a potential workaround for others to try in case the above solutions don't work.
Set the background color of the popup that appears when the spinner is selected to something that contrasts the white text color.
<Spinner
...
android:popupBackground="#color/layout_background"
... />
Here I have defined layout_background as a dark greyish color #565656 in a seperate file called colors.xml located in my src/main/java/res/values folder.

Another solution is to indeed use GetApplication() as the context instead of
getActivity().getApplicationContext();
This way I can use the default item layout without having to declare a new custom layout.
So I guess, CommonsWare was right afterall. It is the context that blew things up.
Please #Commonsware, make your comment an answer so I can accept it, because you deserve it.
EDIT
I was writing this while you wrote your answer, that is why it seems I didn't see your answer :)

Just use getBaseContext() instead of mcontext.
Worked for me. I set the adapter of spinner inside onItemClick function of AutoCompleteTextView and had the same problem of text color until I used getBaseContext(). Hope this answer helps.

Spinner Text Not Visible

I am trying to setText in Spinner but is not visible in device. (Visible in emulater) .
Please give solution for this.

You cant settext to spinner with settext(). You have to use ArrayAdapter for displaying the content in spinner. like this,
Declare an array-
String[] type_array = {"Monthly","Quaterly","Yearly"};
In onCreate()-
spinner_type = (Spinner) findViewById(R.id.spinner_type_susa);
spinner_type.setOnItemSelectedListener(this);
ArrayAdapter<String> adapter_type = new ArrayAdapter<String>(this,R.layout.spinner_row,type_array);
adapter_type.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner_type.setAdapter(adapter_type);

You gave the text a holo color that is only available on a high API level and your device doesn't know what to do with it so it gave the default color of text which is black, which just happens to be the color of the background in your spinner. Yes this is a wild guess.

Change font size on actual Spinner button object

I know it is possible to change the font size of the Spinner menu that pops up when the button is clicked, and I know it is possible to change the font size of an ordinary button - but I can't seem to find anything on changing the size of the text in the actual spinner button itself. Is this possible? If so, how can it be done?

This is the generic layout from simple_spinner_item.xml, I've added a textSize attribute at the bottom, let's save it as spinner_item.xml:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/text1"
style="?android:attr/spinnerItemStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:singleLine="true"
android:textSize="36sp" />
And you use it just like any other layout in an adapter:
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.spinner_item, list);
adapter.setDropDownViewResource(android.R.layout.spinner_dropdown_item);
spinner.setAdapter(adapter);

There is no "text in the actual spinner button itself", except what you put there. You determined the layout that appears in the Spinner, in both the closed and open states, by how you set up your SpinnerAdapter (e.g., via layout files supplied to the constructor and to setDropDownViewResource()). If you want to change anything about those layouts, you need to change your layout resources or change your SpinnerAdapter.