Question

我在对话框中有一个微调器，我试图从微调器中的所选项目中获取值，并将其传递给String变量。我发现的方法是spinner.setOnItemSelectedListener（）。

但是，此方法需要在对话框外设置另一种方法。代码附在下面。

这是对话框的代码

private void recordDialog() {
    LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
    View subView = inflater.inflate(R.layout.record, null);

    //get current date
    Calendar calendar = Calendar.getInstance();
    String pattern = "dd-MMM-yy";
    DateFormat dateFormat = new SimpleDateFormat(pattern);
    final String currentDate = dateFormat.format(calendar.getTime());

    //get category
    final Spinner spinner = subView.findViewById(R.id.spinner);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.category, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(this);
    ...
    final AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

还有对话框之外的部分

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    String selectedCategory = parent.getItemAtPosition(position).toString();
}

反正有没有完成对话框中的所有内容？

Answer 1

好吧，您只需在onItemSelectedListener函数中实现recordDialog：

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
      public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
         // Do your stuff here    
      }

      public void onNothingSelected(AdapterView<?> parent) {
         // Do your stuff here  
      }
  });
}

对话框中的OnItemSelectedListener

1 个答案: