android registration form validation

Question

what method should i use to validate a login registration form in android ?

The validation should take place once the user moves on to the next edittext.

You need provide more details on what you have tried and your code. — Ravi Y, Feb 04 '13 at 07:56

score 1 · Accepted Answer · edited May 23 '17 at 12:12

1

I am sure you want to validate values being entered by user in EditText, if this is the case then you can implement TextWatcher for the EditText.

Check this thread: How to use the TextWatcher class in Android?

edited May 23 '17 at 12:12

Community

1
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answered Feb 04 '13 at 07:38

Paresh Mayani

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score 1 · Answer 2 · answered Feb 04 '13 at 07:46

Try to use setOnFocusChangeListener of the EditText.

Set your validation code in onFocusChange of setOnFocusChangeListener. Once your focus is off then the code/your validation will execute.

Have a look at the following code.

edittext.setOnFocusChangeListener(new OnFocusChangeListener() 
{          

                    public void onFocusChange(View v, boolean hasFocus) 
                    {
                        if(!hasFocus)
                        {
                            // your validation code
                        }
                    }
});

score 0 · Answer 3 · answered Feb 04 '13 at 07:46

Based on your requirement .. Do validation when editText loses focus ...

edit_Text.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
  if(hasFocus){

  }else
      // Do validation here.....
  }
});

score 0 · Answer 4 · edited Feb 04 '13 at 08:01

There Are 2 Ways to Validate

at each Field Validation

on Button click Validation for Type One you need to Implement TextWatcher for each Field sample Snippet is Following

EdittextFieldName.addTextChangedListener(new TextWatcher() 
{                    
@Override

  public void onTextChanged(CharSequence s, int start, int before, int count) {

                    // TODO Auto-generated method stub
                }

                @Override
                public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                    // TODO Auto-generated method stub
                }

                @Override
                public void afterTextChanged(Editable s) {

                    // TODO Auto-generated method stub
                }
            });

and for type 2 You need to check field Data Validations According to filed Type like

Email formate is invalid
Email not entered
empty field
not followed Sequence etc

android registration form validation

4 Answers4