Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
931 views
in Technique[技术] by (71.8m points)

java - How to get Spinner Selected Item in Android

I am making a currency converter with two spinners. I want to make an "if" function using the values of the spinner's selected item like below.

    @Override
    public void onClick(View v) {
        if (spinner1.getSelectedItem()=="Dollars" && spinner2.getSelectedItem()=="Euros") {
            convertDollarstoEuros();
        }
        if (spinner1.getSelectedItem()=="Euros" && spinner2.getSelectedItem()=="Euros") {
            convertEurostoEuros();
        }
    Toast.makeText(MainActivity.this,
            "OnClickListener : " + 
                    "
Spinner 1 : "+ String.valueOf(spinner1.getSelectedItem()) + 
                    "
Spinner 2 : "+ String.valueOf(spinner2.getSelectedItem()),
                Toast.LENGTH_SHORT).show();
        }

The problem is that the toast is showing, but the currencies aren't converting. The toast part is working, but the spinner part isn't. Any help would be greatly appreciated. Here is my LogCat:

enter image description here

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Try this :

if (spinner1.getSelectedItem().toString().equals("Dollars") && spinner2.getSelectedItem().toString().equals("Euros")
...

getSelectedItem() returns an Object . info . So you have to get the corresponding string first. Then java compares strings using equals().


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...