android spinner默认选中,Android列表选择：两种方法给Spinner初始化

public class SpinnerActivity extends Activity {

Spinner spinner_c;

Spinner spinner_2;

private ArrayAdapter aspnCountries;

private List allcountries;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setTitle("SpinnerActivity");

setContentView(R.layout.spinner);

find_and_modify_view();

}

private static final String[] mCountries = { "China" ,"Russia", "Germany",

"Ukraine", "Belarus", "USA" };

private void find_and_modify_view() {

//第一种方法，用数组的方法动态传入值

spinner_c = (Spinner) findViewById(R.id.spinner_1);

allcountries = new ArrayList();

for (int i = 0; i < mCountries.length; i++) {

allcountries.add(mCountries[i]);

}

aspnCountries = new ArrayAdapter(this,

android.R.layout.simple_spinner_item, allcountries);

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

spinner_c.setAdapter(aspnCountries);

//第二种方法，通过资源文件固定初始化值。

spinner_2 = (Spinner) findViewById(R.id.spinner_2);

ArrayAdapter adapter = ArrayAdapter.createFromResource(

this, R.array.countries, android.R.layout.simple_spinner_item);

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

spinner_2.setAdapter(adapter);

}