Android - The method is undefined

Question

I keep getting this error while trying to convert to CharSequence[].

The method toArray(CharSequence[]) is undefined for the type String

This is my code

              CharSequence[] cs = abbrev.toArray(new CharSequence[abbrev.length()]);

The abbrev is just splitting sentences into its first characters (Hello World --> HW)

       String[] result = matches.toString().split("\\s+");
        // The string we'll create

        String abbrev = "";

           // Loop over the results from the string splitting
           for (int i = 0; i < result.length; i++){

               // Grab the first character of this entry
               char c = result[i].charAt(0);

               // If its a number, add the whole number
               if (c >= '0' && c <= '9'){
                   abbrev += result[i];
               }

               // If its not a number, just append the character
               else{
                   abbrev += c;
               }
           }

Any Ideas?

Thanks

What do you not understand about the very clear error message? — Tim, Feb 24 '15 at 19:18

score 0 · Answer 1 · answered Feb 24 '15 at 19:20

0

Because abbrev is a string, you can't call toArray on it. Convert it to a CharSequence first. For example,

CharSequence[] abbrevCs = abbrev; // it's converted automatically
CharSequence[] cs = abbrevCs.toArray(new CharSequence[abbrev.length()]);

answered Feb 24 '15 at 19:20

Joshua Grosso Reinstate CMs

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He is trying to convert it to a CS – Tim Feb 24 '15 at 19:21
Tried that and getting this error Type mismatch: cannot convert from String to CharSequence[] – BasicCoder Feb 24 '15 at 19:27
Are all your tools up-to-date? Try rebuilding the project. If you're using an IDE, restart the IDE. Uninstall and reinstall things in a worst-case scenario. Have fun :) – Joshua Grosso Reinstate CMs Feb 24 '15 at 20:43
Done all that still occurring – BasicCoder Feb 25 '15 at 11:52
You uninstalled the JDK and the IDE? (and then reinstalled them?) If so, try it on a different computer.... – Joshua Grosso Reinstate CMs Feb 25 '15 at 16:00

score 0 · Answer 2 · edited May 23 '17 at 12:12

0

You don't have to convert a String to a CharSequence because a String is a CharSequence. You can just assign a String object to a CharSequence object and the conversion is implicit. See here for more details: How to convert a String to CharSequence?

edited May 23 '17 at 12:12

Community

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1

answered Feb 24 '15 at 19:21

vdelricco

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However, the OP is still getting the error message, so something's going wrong.... – Joshua Grosso Reinstate CMs Feb 24 '15 at 19:22
Right, but what the OP is doing isn't necessary or correct. They can simply assign the `abbrev` to `cs` and the conversion is implicit. – vdelricco Feb 24 '15 at 19:24
Of course, but _something's_ going wrong, so this solution won't work. If this answer was correct, the question wouldn't be here.... – Joshua Grosso Reinstate CMs Feb 25 '15 at 15:59

Android - The method is undefined

2 Answers2