在Android中动态禁用微调器项目

Question

对于我们的项目，我需要实现以下内容：当在另一个微调器中选择了相同的项时，将禁用一个微调器项（反之亦然）。关于如何实现它的任何想法，或者是否已经存在这样的实现（可能在适配器或Spinner类中）？

Answer 1

我知道两个微调器都具有相同的项目列表，因此您可以设置第一个微调器并获取位置，并在第二个微调器中自动禁用该位置。

public class MainActivity extends AppCompatActivity {
int selectedItemSpinner1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    // Items in the two Spinners
    String[] languages = new String[]{
            "English",
            "French",
            "German",
            "Spanish",
            "Italien"
    };
    List<String> languagesList = new ArrayList<>(Arrays.asList(languages));


    // Set the spinner 1 and get the selected value position
    Spinner spinner1 =  findViewById(R.id.spinner1);
    ArrayAdapter<String> adapter = new ArrayAdapter<>(this,R.layout.support_simple_spinner_dropdown_item,languagesList);
    spinner1.setAdapter(adapter);

    spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            selectedItemSpinner1 = position;
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
        }
    });


    // Set the spinner 2 and disable the position
    Spinner spinner2 =  findViewById(R.id.spinner2);
    ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this,R.layout.spinner_item,languagesList){
        @Override
        public boolean isEnabled(int position){
            if(position == selectedItemSpinner1)
            { return false;
            }
            else
            {
                return true;
            }
        }

        @Override
        public View getDropDownView(int position, View convertView, ViewGroup parent) {
            View view = super.getDropDownView(position, convertView, parent);
            TextView tv = (TextView) view;

            if(position==selectedItemSpinner1) {
                // Set the disable item text color
                tv.setTextColor(Color.GRAY);
            }
            else {
                tv.setTextColor(Color.BLACK);
            }
            return view;
        }
    };
    spinnerArrayAdapter.setDropDownViewResource(R.layout.spinner_item);
    spinner2.setAdapter(spinnerArrayAdapter);
}