Number formatting does not take into account locale settings. Consider using String.format instead android studio

Question

Here is my question and its solution regarding this problem..

Em trying to pass textview value between different activities, and em getting a problem. when i execute the code, the app crashes on opening StudentActivity, but then it shows the correct result..here is the code

LoginActivity.java

    int a = Integer.parseInt(textView.getText().toString());
    Intent i = new Intent(LoginActivity.this, StudentActivity.class);
    i.putExtra("level", a);
    startActivity(i);

StudentActivity.java

      textView.setText(Integer.toString(getIntent().getExtras().getInt("level")));

IN studentActivity, Integer.toString(getIntent().getExtras().getInt("level")) => this line says Number formatting does not take into account locale settings. Consider using String.format instead.Please suggest some code.. Any help would be truely appreciated!!

Cristobal

Answer 1

Use

textView.setText(String.format(Locale.getDefault(), "%d", your_int));

The correct locale will automatically be used

Brickey

Answer 2

Regarding the warning :

"Number formatting does not take into account locale settings. Consider using String.format instead android studio",

This is a Lint warning called "TextView Internationalization" which says :

When calling TextView#setText * Never call Number#toString() to format numbers; it will not handle fraction separators and locale-specific digits properly. Consider using String#format with proper format specifications (%d or %f) instead.

So you should have written :

 textView.setText(String.format("%d", getIntent().getExtras().getInt("level"))));

Stickup

well you still didn't set locale here, no difference – Peculium

You can call String.format(Locale.getDefaultLocale(), "%d", getIntent().getExtras().getInt("level"))) and locale is added – Buckinghamshire

Answer 3

In you LoginActivity, you insert String! named "a" into Intent.

In your StudentActivity, you try to grab Integer!! thanks for call getInt().

Simply change whole line to

textView.setText(getIntent().getExtras().getString("level"));

Cralg

Hmm I've anyway never used such call over getExtras(). You may try use this getIntent().getStringExtra(). From source code it looks that result is almost same, but getExtras() always create a new instance of Bundle object, so it is also unneeded creating of objects. Anyway your code looks completely correctly and I have no idea why it should complain about locale when you play with integer number. Suggest to check different places in your code. – Cralg

Sorry for a delay. Anyway you gave so little details. Generally, there is no place where should NullPointerException happen. 'getIntent' should be always non-null. GetStringExtra may return null, but such value set to TextView is valid! So please check your code, because problem is not on this line of code. Otherwise you have to post longer version of your code. – Cralg

i've changed my format, i've used shared preference for passing data – Cristobal

Answer 4

I used:

textView.setText(getIntent().getExtras().getString("level"));

but it still has some warning; when I use this:

textView.setText(Locale.getDefault(), getIntent().getExtras().getString("level"));

it is Ok;

Braeunig