Spinner控件简单应用

一、
Activity部份代码

// Generate spinner entries using XML
arrays

int visiblelimitValuesId =
R.array.account_settings_down_count_values;
int visiblelimitEntriesId =
R.array.account_settings_down_count_entries;
CharSequence[] visiblelimitValues =
getResources().getTextArray(visiblelimitValuesId);
CharSequence[] visiblelimitEntries =
getResources().getTextArray(visiblelimitEntriesId);

// Now create the array used by the
Spinner
SpinnerOption[] checkVisiblelimits =
new
SpinnerOption[visiblelimitEntries.length];

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

checkVisiblelimits = new
SpinnerOption(

Integer.[i]valueOf(visiblelimitValues.toString()),
visiblelimitEntries[i].toString());

}

ArrayAdapter<SpinnerOption>
checkVisiblelimitsAdapter = new ArrayAdapter<SpinnerOption>
(this,android.R.layout.[i]simple_spinner_item, checkVisiblelimits);

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

downloadCount.setAdapter(checkVisiblelimitsAdapter);

SpinnerOption.setSpinnerOptionValue(downloadCount, VISIBLE_LIMIT_DEFAULT);

二、
SpinnerOption代码

public class SpinnerOption {

public final Object value;

public final String label;

public static voidsetSpinnerOptionValue(
Spinner spinner, Object value)
{

for (int i = 0, count = spinner.getCount(); i
< count; i++) {

SpinnerOption so =
(SpinnerOption)spinner.getItemAtPosition(i);

if (so.value.equals(value)) {

spinner.setSelection(i, true);

return;

}

}

}

public SpinnerOption(Object value, String
label) {

this.value = value;

this.label = label;

}

@Override

public String toString() {

return label;
}

三、
如何获取Spinner选中项值

int visibelLimit =
(Integer)((SpinnerOption)downloadCount.getSelectedItem()).value;

四、

<PreferenceCategory
android:title="@string/account_settings_download_title">

<ListPreference

android:layout="?android:attr/preferenceLayoutChild"

android:dependency="account_down"

android:key="account_settings_down"

android:defaultValue="never"

android:title="@string/account_settings_download_title"

android:entries="@array/account_settings_down_entries"

android:entryValues="@array/account_settings_down_values"

android:dialogTitle="@string/account_settings_download_title"
/>

</PreferenceCategory>

小结:

Spinner控件对比PreferenceActivity
学习，entries 与 entryValues 相对应