CODEWITHSUNDEEP
javaandroidtextwatcher
mancuss
mancuss

Reputation: 375

EditText with negative number and TextWatcher

I have a problem with inputting negative int into my EditText, when I do so I get an error 09-12 06:26:42.025: E/AndroidRuntime(18247): java.lang.NumberFormatException: Invalid int: "-" xml file:

<EditText
        android:id="@+id/downAndDistanceStarting"
        android:layout_width="180dp"
        android:layout_height="match_parent"
        android:ems="10"
        android:inputType="numberSigned"
        android:selectAllOnFocus="true"
        android:textSize="@dimen/enterText" >

java code:

end = (EditText) findViewById(R.id.downAndDistanceEnding);
public void afterTextChanged(Editable s) {
int w = Integer.parseInt(end.getText().toString());
}

I'm assuming there is a problem with my textWatcher and it is "sending" my input after every keyboard "press", so when I'm trying to input -12 it sends "-" for "parsening" before I manage to finish, and that's why my app is crashing, am I right? any one knows how to fix it?

Upvotes: 0

Views: 756

Answers (2)

B-Android
B-Android

Reputation: 11

I faced the same problem. I put a if condition before it is parsing. Like this, So till you enter the second digit it will not parse.

end = (EditText) findViewById(R.id.downAndDistanceEnding);
public void afterTextChanged(Editable s) {
  if(!end.getText().toString().equals("-"));
  {
    int w = Integer.parseInt(end.getText().toString());
  } else { //do something  }
}

Upvotes: 1

kosa
kosa

Reputation: 66637

Yes you are correct. Wrap your code in try/catch block, then, when - is received it will throw NumberFormatException and it will be catched.

try
{
int w = Integer.parseInt(end.getText().toString());
}catch(NumberFormatException e)
{

}

Upvotes: 0

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