public static String[] stripAll(String... strs) {
        return stripAll(strs, null);
    }
<p>Strips whitespace from the start and end of every String in an array.
Whitespace is defined by {@link Character#isWhitespace(char)}.</p>

<p>A new array is returned each time, except for length zero.
A {@code null} array will return {@code null}.
An empty array will return itself.
A {@code null} array entry will be ignored.</p>

<pre>
StringUtils.stripAll(null)             = null
StringUtils.stripAll([])               = []
StringUtils.stripAll(["abc", "  abc"]) = ["abc", "abc"]
StringUtils.stripAll(["abc  ", null])  = ["abc", null]
</pre>

@param strs  the array to remove whitespace from, may be null
@return the stripped Strings, {@code null} if null array input
android/android_framework/base/src/main/java/lang3/StringUtils.java