In order to define a string array write in a resources file
res/values/filename.xml
<string-array name="string_array_name">
<item>text_string</item>
<item>@string/string_id</item>
</string-array>
for example
res/values/arrays.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="string_array_example">
<item>@string/app_name</item>
<item>@string/hello_world</item>
</string-array>
</resources>
and use it from java like
String[] strings = getResources().getStringArray(R.array.string_array_example;
Log.i("TAG",Arrays.toString(strings)));
Output
I/TAG: [HelloWorld, Hello World!]