how to convert from string to integer

Question

I have a problem that made me confused, i want to use the value of EditText and convert it to int, when launching the activity it displays on logcat "invalid int" and i make the input value for the editText is 9 digits! could you help me in finding the problem

this is my code:

     String texti =  numberi.getText().toString();
     int x = Integer.parseInt(texti);

can you do a trim on string before doing parseInt. Just to eliminate any chances of space character or so — Saurabh
– Saurabh, Commented Feb 22, 2013 at 5:07
yes, the problem that i used this way, and for some reason it doesn't work!!! — Hussam Ali Alzoubi
– Hussam Ali Alzoubi, Commented Feb 22, 2013 at 5:09

Shoshi · Accepted Answer · 2013-02-22 05:18:23Z

1

u said that u have wrote that in onCreate(). so u have to check first, is the text is null or not:

String texti =  numberi.getText().toString();
long x;
if(texti.trim().length() > 0)
  x = Long.parseLong(texti);

answered Feb 22, 2013 at 5:18

Shoshi

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asifsid88 · Accepted Answer · 2013-02-22 05:06:51Z

1

You have to save it in long

long x = Long.parseLong(texti);

answered Feb 22, 2013 at 5:06

asifsid88

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Vipul · Accepted Answer · 2013-02-22 05:08:44Z

1

If your only objective is to allow user to input numbers into EditText.Then use

android:inputType="number"

And then Integer.parseInt(editText.getText().toString());

answered Feb 22, 2013 at 5:08

Vipul

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Aniket Inge · Accepted Answer · 2013-02-22 05:07:19Z

0

The integer in texti could be larger than Integer.MAX_VALUE value, so use Long instead

long x = Long.parseLong(texti.trim());

answered Feb 22, 2013 at 5:07

Aniket Inge

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GrIsHu · Accepted Answer · 2013-02-22 05:12:54Z

0

What you have code is correct but for better way use this,

  String texti =  numberi.getText().toString();
  int x = Integer.parseInt(texti.trim());  // Trim the extra spaces, if any.

Always have habbit to trim() when converting to Numeric format, This will prevent from NumberFormatException

edited Feb 22, 2013 at 5:12

GrIsHu

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answered Feb 22, 2013 at 5:07

user2060383

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Avadhani Y · Accepted Answer · 2013-02-22 05:27:59Z

0

Parsing String to Integer:

    Integer.parseInt(<Your EditText>.getText().toString());

answered Feb 22, 2013 at 5:27

Avadhani Y

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Comments

Siddharth Srivastava · Accepted Answer · 2013-02-22 05:46:04Z

Ideally, if your EditText will only accept integers then you should set inputType property to either:

numberSigned
number

eg. something like this:

<EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/editTextCustomerPin"
        android:layout_marginTop="20dp"
        android:inputType="numberSigned"
        android:textSize="16dp" android:hint="@string/enterCustomerPin"
        android:layout_gravity="center_horizontal"/>

Now in your activity, you can always do:

EditText myEditText = (EditText) findViewById(R.id.editTextCustomerPin);
String editTextContent = myEditText.getText().toString();
if (editTextContent.length() > 0) {
     int num = Integer.parseInt(num);
     //Do your processing
} else {  
     //Show error message, eg. a toast or an alert dialog
}

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