CODEWITHSUNDEEP
javaandroidandroid-studiotextview
snapplex
snapplex

Reputation: 851

Append text to a TextView datatype

I'm a beginner android/java programmer and my background is primarily in C++ and C#. In C# if I have a string variable called myWord and it has a value of "Hello" I can append additional information by using the + operator.

I tried this method a few times in java and apparently I can't use this tatic because the TextView datatype is void. Android studio gives me the following error: Operator '+' cannot be applied to 'void', 'java.lang.String'

/*C # */
public string bob ()
{
return "Bob!";
}

string myWord = "Hello ";
myWord = myWord + "Bob!"; //myWord is now equal to "Hello Bob!"

OR 

myWord = "Hello " + bob(); //myWord is now equal to "Hello Bob!"


*/ JAVA */
TextView displayTextView = null;
displayTextView.setText("Hello");

I'd like to find a way to append additional text to the original value of "Hello" so the value of displayTextView will be "Hello Bob!"

Any ideas?

Edit: I'm currently using a capital "S" and my app can successfully access and retrieve information from my class. The app would FC whenver I tried to append text to to the TextView data type.

Thank you for the feedback everyone.

Upvotes: 24

Views: 55938

Answers (5)

Longi
Longi

Reputation: 3973

You can call append() on a TextView object.

In your case it would be: displayTextView.append("Bob!");

Upvotes: 46

TejjD
TejjD

Reputation: 2561

Your issue is on your declaration of the String instance in both the method and the variable.

It requires a "S" not a lower case s.

Also the "+" sign does work, it is just your String declaration as pointed out.

Here is how it looks

All the best :)

Upvotes: 1

Shihab
Shihab

Reputation: 2679

First letter of String is not small letter. To take a String variable in java you have to write String var;

So, for android use following code:

TextView displayTextView = null;
TextView displayTextView = (TextView) findViewById(R.id.myText);
String myWord = "Your";
displayTextView.setText("Hello " + myword);

This should work.

Upvotes: 1

deadfish
deadfish

Reputation: 12304

Why nobody suggested getText() method ?

TextView displayTextView = null;
displayTextView.setText("text1");
displayTextView.setText(displayTextView.getText() + "text2");//poor and weak

or better for longer strings:

SpannableString ss =new SpannableString();
ss.append("text1").append("text2");
displayTextView.setText(ss);

Upvotes: 3

mrek
mrek

Reputation: 1888

If you are using TextView, use append. For example: 

TextView textView = (TextView) findViewById(R.id.myText);
textView.setText("Hello");
textView.append(" Bob!");

Upvotes: 12

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