一个微调显示单选按钮，接下来不 [英] One spinner shows radio buttons, the next doesn't

问题描述

我有两个纺纱厂，一个在上对方，就像这样：

I have two spinners, one above each other, like this:

<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"
/>

我把他们像这样

// 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，而是先有单选按钮和第二不。任何想法，为什么？

They both display the correct data, but the first has radio buttons and the second doesn't. Any ideas why?

（R.layout.simple_spinner_item是一样的android.R.layout.simple_spinner_item，除了它具有的android：文字颜色=@彩色/黑白添加）

(R.layout.simple_spinner_item is the same as android.R.layout.simple_spinner_item, except it has android:textColor="@color/black" added.)

推荐答案

在第二微调，我认为你已经犯了一个错误
写

In second spinner I think you have made a mistake Write

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

所以你的code将

So your code will be

// 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);

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