how to clear spinner value in android

问题

i have two spinners when i select items(other then first item) in first spinner which is saved in array it populates data in spinner second which comes from web services. i want that when i again select first data which is title of spinner first it should clear all the value from spinner second. i did all tricks but helpless. suggest me.

my code is:

  if(spinner1== 0) {
        spinner2List.clear();
        ArrayAdapter<String> adapterEmpty = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinner2List);
        adapterEmpty.setDropDownViewResource(R.layout.spinner_layout);

        // Apply the adapter to the spinner
        spinner2.setAdapter(adapterEmpty);
    }

thanks.

回答1:

You have called spinner2List.clear(); but haven't notified the adapter by using notifyDataSetChanged(); method.

回答2:

when you select one of your first spinner Items you can use code below in first spinner onItemSelected() method to clear your second spinner.

 Spinner2.setAdapter(null)

回答3:

The Below Code is Used for Clearing the Spinner Value:-

ArrayList<String> allAreaNames;

                allAreaNames.clear();

                ArrayAdapter<String> AreaAdapter = new ArrayAdapter<String>
                        (context, android.R.layout.simple_spinner_item, allAreaNames);


                AreaAdapter.setDropDownViewResource
                        (android.R.layout.simple_spinner_dropdown_item);

                AreaSpinner.setAdapter(AreaAdapter);

来源：https://stackoverflow.com/questions/14706497/how-to-clear-spinner-value-in-android

标签

android

spinner