I Build a Brain Trainer app but Not Showing my TEXTVIEW when i run my app and warning is showing do not concatenate text display with setText

Question

sumTextView.setText(Integer.toString(a) + " + " + Integer.toString(b));

This Line show warning you see in pic..

Possible duplicate of [Android TextView : "Do not concatenate text displayed with setText"](http://stackoverflow.com/questions/33164886/android-textview-do-not-concatenate-text-displayed-with-settext) — Mr.7, Aug 08 '16 at 12:55
Not understanding the issue, please post the xml file or log file. — Satish Bonagiri, Aug 08 '16 at 12:55

score 0 · Answer 1 · answered Aug 08 '16 at 12:55

Use String.format();

sumTextView.setText(String.format("%1$d + %2$d", a, b));

With this you can format a string correctly with multiple variables, no matter whether they are strings or integers. This example takes the value of variable a and replaces the placeholder %1$d with it. Same goes for the other variable.

score 0 · Answer 2 · answered Aug 08 '16 at 12:56

0

take an string copy whole line in it, then show string in setText

String str = (Integer.toString(a) + " + " + Integer.toString(a));
sumTextView.setText(str);

answered Aug 08 '16 at 12:56

Shahzain ali

1,679
1
20
33

score 0 · Answer 3 · answered Aug 08 '16 at 13:00

1. The First String Says that do not concate string with setText property.

String txt = String.valueOf(a) + " + " + String.valueOf(b);
sumTextView.setText(str);

2. Second warning says that your program have possibility to crash or genearte an exception in case if value of a or b is null or not an integer. So check condition if(a!=null and b!=null) then display text in if condition.

I Build a Brain Trainer app but Not Showing my TEXTVIEW when i run my app and warning is showing do not concatenate text display with setText

3 Answers3