What does an EditText.getText() in android return if it is empty?

Question

我尝试过null和空字符串，还有其他想法吗？

Answer 1

No other possibility.

getText , infact, will never return null. It returns CharSequence whose contents may be empty.

Instead of doing getText().toString().equals("") or vice-versa, it may be faster to do getText().length() == 0

Answer 2

If it's empty, this will work:

if(mEditText.getText().toString().equals("")) {
    // stuff to run when it's empty
}

Even if it's empty, getText() will still return an Editable, so if you were trying to do this:

if(mEditText.getText().equals("")) {
    // stuff
}

It most certainly wasn't working.

Answer 3

You can use TextUtils.isEmpty( mEditText.getText().toString() ). It will return true if its empty/null.

Answer 4

The best way I found to check it is to stock the value in a var like:

String text = mEditText.getText().toString();

and then to use boolean operator isEmpty like:

if (text.isEmpty){
    // stuff
} 

Answer 5

After looking at several questions and since it's already possible to get a null I've found the answer to avoid a

method invocation toString may produce NPE

warning all over the place:

String theText = String.valueOf(mEditText.getText());