Question

public class StartCalvert extends Activity {

Spinner spnr,spnr2;
String[] numsys = {
        "Binary",
        "Decimal",
        "Octal",
        "Hexadecimal"
};

// this numsys how will i declare
String[] numsys2 = {
        "Binary",
        "Decimal",
        "Octal",
        "Hexadecimal"
};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.startcalvert);
    spnr2 = (Spinner)findViewById(R.id.spinner2);
    spnr = (Spinner)findViewById(R.id.spinner);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(
            this, android.R.layout.simple_spinner_item, numsys);
   //declare here , like what above alike .
    spnr.setAdapter(adapter);
    spnr.setOnItemSelectedListener(
            new AdapterView.OnItemSelectedListener()

Answer 1

每个Spinner都有它的适配器将其Datasource与视图绑定在一起，所以很可能你需要为每个Spinner和任何其他数据视图创建一个

Answer 2

创建

  spinner1 = (Spinner) findViewById(R.id.spinner1 );
        spinner2 = (Spinner) findViewById(R.id.spinner2 );

    ArrayAdapter<String> adapterSpinner1 = new ArrayAdapter<String>(
                                    SpinnerActivity.this, R.layout.simple_spinner_item,
                                    numsys);
                            spinner1.setDropDownViewResource(R.layout.simple_spinner_item);
                            spinner1.setAdapter(adapterSpinner1);

    ArrayAdapter<String> adapterSpinner2 = new ArrayAdapter<String>(
                                    SpinnerActivity.this, R.layout.simple_spinner_item,
                                    numsys2);
                            spinner2.setDropDownViewResource(R.layout.simple_spinner_item);
                            spinner2.setAdapter(adapterSpinner2);

ItemSelectedListener itemSelectedListener = new ItemSelectedListener();
                spinner1.setOnItemSelectedListener(itemSelectedListener);
                spinner2.setOnItemSelectedListener(itemSelectedListener);

声明内部类

class ItemSelectedListener implements OnItemSelectedListener {

        @Override
        public void onItemSelected(AdapterView<?> parent, View v, int position,
                long arg3) {

            LoggerGeneral.info("OnItemselected pressed");
            switch (parent.getId()) {

            case R.id.spinner1:


                break;

            case R.id.spinner2:

                break;

            default:
                break;
            }

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {

        }

    }

如何在一个类中声明另一个微调器id

2 个答案: