spinner.setOnItemSelectedListener(this);
此方法需要实现 implements AdapterView.OnItemSelectedListener此类
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
//i代表的是下拉框被选中的内容是第几个,从0开始
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
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