我目前正在为我的Android应用程序开展帐户管理活动,而且我无法弄清楚为什么来自微调器的setSelection()方法不会触发附加到所述Spinner的OnItemSelectedListener。
这是我目前所拥有的;
onCreate()方法:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.account_management);
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
retreiveLanguage();
initializeUI();
// Vérification si l'usager est déjà connecté
Globals appState = ((Globals) this.getApplication());
boolean userLoggedIn = appState.isUserLoggedIn();
boolean userInfoAvailable = appState.isUserInfoAvailable();
if (userLoggedIn && userInfoAvailable) {
fillUI();
}
}
来自initializeUI()方法的相关行,该方法在Activity的创建中调用,该方法显示Spinner与Listener的绑定:
/** OnItemSelectedHandler for the Country Spinner */
mCountrySpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
Log.i(TAG, "onCountrySelected() was called, position : " + pos);
mProvinces = new ArrayList<String>();
mProvincesCode = new ArrayList<String>();
mXML.parseResponse(FileManager.getInstance().getPortalOptions());
for (int i = 0; i < mXML.getCountry(pos).sizeProvinces(); i++){
mProvinces.add(mXML.getCountry(pos).getProvince(i).getLabel(mLanguage));
mProvincesCode.add(mXML.getCountry(pos).getProvince(i).getCode());
}
mProvinceArrayAdapter = new ArrayAdapter<String>(ManageAccountActivity.this,
android.R.layout.simple_spinner_item, mProvinces);
mProvinceArrayAdapter.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
mProvinceSpinner.setAdapter(mProvinceArrayAdapter);
}
public void onNothingSelected(AdapterView<?> arg0) {
// Do Nothing ...
}
});
又来了几行,这次来自fillUI方法():
Log.i(TAG, "Setting country based on user information.");
((Spinner) findViewById(R.id.spin_country))
.setSelection(mCountriesCode.indexOf(mUser.getCountry()));
// TODO : Fix Provinces and States not being changed accordingly
Log.i(TAG, "Setting province based on user information.");
((Spinner) findViewById(R.id.spin_province))
.setSelection(mProvincesCode.indexOf(mUser.getProvince()));
因此,我希望在我在fillUI()方法中设置选择后立即调用OnItemSelectedListener,但这不是在运行时发生的事情:S
这是我的LogCat摘录,显示当选择应用于国家/地区微调器时,不会调用监听器:
I / ManageAccountActivity(28108):根据用户信息设置国家/地区。
I / ManageAccountActivity(28108):根据用户信息设置省份。
I / ManageAccountActivity(28108):onCountrySelected()被调用,位置:1
作为一个实验,我也尝试将fillUI()调用放在我的Activity的onStart方法中,但这并没有改变应用程序的反应方式。
提前感谢任何指示,帮助或提示!
答案 0 :(得分:23)
您是否尝试使用两个参数设置微调器,第二个使用布尔值:
.setSelection(mProvincesCode.indexOf(mUser.getProvince()), true);
从它显示的developers page:
setSelection(int position, boolean animate)
//Jump directly to a specific item in the adapter data.
答案 1 :(得分:3)
只需使用以下代码:
ownerSpinnerVw.post(new Runnable() {
@Override
public void run() {
ownerSpinnerVw.setSelection(position);
}
});
答案 2 :(得分:0)
我发现我的问题的解决方案是将其添加到onCreate方法中。该程序有效但仅适用于第一次选择。第二次选择程序会使模拟器崩溃。
spinner.setOnItemSelectedListener(this);
答案 3 :(得分:0)
I found that setSelection(pos) works if you declare
yourSpinner.setOnItemSelectedListener(null);
before that.