CODEWITHSUNDEEP
javaandroid-studioandroid-edittext
aftab alee
aftab alee

Reputation: 13

app crashes with no input while using Edittext in android studio

I am having this issue with Edittext in android studio.The app works fine but app crashes with no input

Here is the java code

public void onButtonClick (View v)
{
    int num1,num2,sum;

    EditText e1 = (EditText)findViewById(R.id.num1);
    EditText e2 = (EditText)findViewById(R.id.num2);

    TextView t1 = (TextView)findViewById(R.id.sum);

    num1 = Integer.parseInt(e1.getText().toString());

    num2 = Integer.parseInt(e2.getText().toString());

    sum = num1 + num2;

    t1.setText(Integer.toString(sum));
}

Upvotes: 0

Views: 2007

Answers (1)

Uma Kanth
Uma Kanth

Reputation: 5629

Integer.parseInt() fails when no input is given, calculate only if there is an input.

public void onButtonClick (View v)
{
    int num1 = 0,num2 = 0,sum = 0;
    EditText e1 = (EditText)findViewById(R.id.num1);
    EditText e2 = (EditText)findViewById(R.id.num2);

    TextView t1 = (TextView)findViewById(R.id.sum);
    if(!(e1.getText().toString()).equals(""))
       num1 = Integer.parseInt(e1.getText().toString());
    if(!(e2.getText().toString()).equals(""))
       num2 = Integer.parseInt(e2.getText().toString());

    sum = num1 + num2 ;

    t1.setText(sum.toString());
}

Your application will crash if the given input is not a number.

To make an EditText only accept numbers

In the xml file use this

<EditText
    android:inputType="number"
    android:digits="0123456789."
/>

Upvotes: 2

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