CODEWITHSUNDEEP
androidstring
root14
root14

Reputation: 25

Android one line getText() declarations. What is the difference?

What is the difference? Aren't they actually the same thing?

I'm getting "Cannot resolve method 'getText' in 'View'"

string = findViewById(R.id.signup_email).getText().toString();

But it's working perfectly.

textView = findViewById(R.id.signup_email);

string = textView.getText().toString();

Upvotes: 0

Views: 107

Answers (3)

Dinkar Kumar
Dinkar Kumar

Reputation: 2250

you can do something like this

((TextView)findViewById(R.id.signup_email)).getText().toString();

if you do just findViewById you will get View as the returned Object which is the parent of TextView but have a limited method to work with. So if we know what type of our view is we should cast the Object to the correct view intended So we can perform a variety of operation specific to that view.

In this case, it's TextView that is the reason we cast it to it and then we are able to use the getText() method of TextView Class which was not available in the View class hence you were getting compilation error for the usage of that method.

Upvotes: 1

mohammed ahmed
mohammed ahmed

Reputation: 305

findViewById() returns a View. So the view does not heve getText() method. So if you modify the first option as follows:

string = ((TextView)findViewById(R.id.signup_email)).getText().toString();

With this, it will cast view to TextView and than you can call get text method.

Upvotes: 0

Nilesh B
Nilesh B

Reputation: 967

First of all findViewById(R.id.signup_email) returns the View object, so when you write this statement findViewById(R.id.signup_email).getText() here getText() applies on view object (apparently View class does not contain this method).

But when you separate in two lines, here textView = findViewById(R.id.signup_email); the View object will be type cast to TextView or EditText (which you defined) object. so from here you will get this method.

If you want to keep in single line you can use

string = ((TextView) findViewById(R.id.signup_email)).getText().toString();

Upvotes: 1

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