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我有一個微調,我希望微調提示爲選擇類。因爲我們在android中有android:hint屬性來編輯文本。我不想讓對話框的微調。我希望微調者在下拉選擇之前提示或暗示。可能嗎?? 請幫忙!!!! 謝謝微調提示下拉功能
我曾嘗試下面的代碼,但憑着工作
classname[0] = "SELECT CLASS";
for (int i = 1; i < classdetails.size() + 1; i++) {
classname[i] = classdetails.get(i - 1).getClass_name() + " "
+ classdetails.get(i - 1).getSection_name().toString();
}
ArrayAdapter<CharSequence> adapterClasses = new ArrayAdapter<CharSequence>(
getApplicationContext(), R.layout.spinner_item_class,
R.id.spinnerclasstxt, classname);
spnrClass.setAdapter(adapterClasses);
spnrClass.setSelection(0);
spnrClass
.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int pos, long arg3) {
int selectedindex = pos;
if (selectedindex == 0) {
spnrSubject.setVisibility(View.INVISIBLE);
} else {
spnrSubject.setVisibility(View.VISIBLE);
selectedClass = classdetails.get(selectedindex - 1);
subjectpopulate(selectedClass);
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
這適用於對話框型旋鈕,但不適用於下拉類型 –