Question

我有两个旋转器，一个在彼此之上，像这样：

<Spinner 
  android:layout_height="wrap_content"
  android:id="@+id/CitySpinner"
  android:layout_width="fill_parent"
  android:prompt="@string/city_prompt"
/>

<Spinner 
  android:layout_height="wrap_content"
  android:id="@+id/CountrySpinner"
  android:layout_width="fill_parent"
  android:prompt="@string/country_prompt"
/>

我像这样设置它们

// set the data adapter for the city spinner
spnCity = (Spinner) findViewById(R.id.CitySpinner);
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
    R.layout.simple_spinner_item,
    mDbHelper.getCities(),
    new String[] { KEY_CITY },
    new int[] {android.R.id.text1});
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnCity.setAdapter(adapter);

// set the data adapter for the country spinner
spnCountry = (Spinner) findViewById(R.id.ProviderSpinner);
SimpleCursorAdapter scaCountries = new SimpleCursorAdapter(this,
    R.layout.simple_spinner_item,
    mDbHelper.getCountries(),
    new String[] { KEY_COUNTRY },
    new int[] {android.R.id.text1});
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnCountry.setAdapter(scaCountries);

它们都显示正确的数据，但第一个有单选按钮而第二个没有。有什么想法吗？

（R.layout.simple_spinner_item与android.R.layout.simple_spinner_item相同，只是添加了android:textColor="@color/black"。）

Answer 1

在第二个旋转器中，我认为你犯了一个错误写

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

所以你的代码将是

// set the data adapter for the country spinner
spnCountry = (Spinner) findViewById(R.id.ProviderSpinner);
SimpleCursorAdapter scaCountries = new SimpleCursorAdapter(this,
    R.layout.simple_spinner_item,
    mDbHelper.getCountries(),
    new String[] { KEY_COUNTRY },
    new int[] {android.R.id.text1});
scaCountries.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnCountry.setAdapter(scaCountries);

一个微调器显示单选按钮，下一个没有

1 个答案: