spinner1.setOnItemSelectedListener(
    new AdapterView.OnItemSelectedListener() {
        //add some code here
    }
);

Spinner spnLocale = (Spinner)findViewById(R.id.spnLocale);

spnLocale.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
        // Your code here
    } 

    public void onNothingSelected(AdapterView<?> adapterView) {
        return;
    } 
}); 

注意:记住一件事。

OnItemSelectedListener事件将执行两次:

旋转器初始化 手动选择的用户

试着用标志变量来区分这两者。

我认为最好的方法是让flagitemselected = 0;在onCreate()。在itemselected event上增加标志，即flagitemselected++;然后检查

if(flagitemselected!=1)
{
// do your work here
}

我想这会有帮助。

spinner.setOnItemSelectedListener(
            new AdapterView.OnItemSelectedListener() {

                @Override
                public void onItemSelected(AdapterView<?> arg0, View arg1,
                        int arg2, long arg3) {

                    // TODO Auto-generated method stub
                }

                @Override
                public void onNothingSelected(AdapterView<?> arg0) {
                    // TODO Auto-generated method stub

                }
                //add some code here
            }
        );

对于kotlin，您可以使用:

spinner.onItemSelectedListener =  object : AdapterView.OnItemSelectedListener {
    override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
        
    }

    override fun onNothingSelected(p0: AdapterView<*>?) {
        
    }
}

注意:对于onItemSelected方法的参数，我使用自定义变量名

你在onCreate或onStart中设置OnItemSelectedListener并不重要——它仍然会在活动创建或启动期间被调用(分别)。 所以我们可以在onCreate中设置它(而不是在onStart中!) 只需添加一个标志来计算第一次初始化:

private Spinner mSpinner;
private boolean mSpinnerInitialized;

然后在onCreate(或onCreateView)中只需:

mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                if (!mSpinnerInitialized) {
                    mSpinnerInitialized = true;
                    return;
                }

                // do stuff
            }

            public void onNothingSelected(AdapterView<?> adapterView) {
                return;
            }
        });