Android如何从数据驱动的微调器中获取所选项目
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Android how to get selected item from data driven spinner
提问by RxRick
Newbie question. I'm using a SimleCursorAdapter to populate a spinner from an SQLite table, as shown in the Android dev docs:
新手问题。我正在使用 SimleCursorAdapter 从 SQLite 表填充微调器，如 Android 开发文档所示：
Spinner list=(Spinner)findViewById(R.id.cboModel);
SimpleCursorAdapter ModelAdapter = new SimpleCursorAdapter(this,
android.R.layout.simple_spinner_item, model,
new String[] {"Drug"},
new int[] {android.R.id.text1});
ModelAdapter.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
list.setAdapter(ModelAdapter);
list.setOnItemSelectedListener(onModelSelect);
I've set up a listener, but I can't figure out how to get the selected item text, it pulls up the SQLiteCursor, not the actual text in the spinner.
我已经设置了一个侦听器，但我不知道如何获取所选项目的文本，它会调出 SQLiteCursor，而不是微调器中的实际文本。
private AdapterView.OnItemSelectedListener
onModelSelect= new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?>
parent, View view, int position, long id) {
ModelName = parent.getSelectedItem().toString();
android.util.Log.w("OnItemSelect.cboModel", ModelName);
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
};
Google turns up the question on several message boards, but no answers, so it appears to be a common newbie question. It may be painfully obvious to some, but if you could point me in the right direction I would appreciate it. Thank you.
谷歌在几个留言板上出现了这个问题，但没有答案，所以这似乎是一个常见的新手问题。对于某些人来说，这可能很明显，但如果您能指出我正确的方向，我将不胜感激。谢谢你。
回答by cdonner
Since the selected item is a Cursor, you can easily get the value by calling getString with the index of the column in the original database query that you used to populate the Spinner.
由于所选项目是一个 Cursor，您可以通过使用用于填充 Spinner 的原始数据库查询中列的索引调用 getString 来轻松获取该值。
String spinnerString = null;
Cursor cc = (Cursor)(yourSpinner.getSelectedItem());
if (cc != null) {
spinnerString = cc.getString(
cc.getColumnIndex("Drug"));
}
This technique definitely works when the Spinner is populated from the database. I have not tried it with a resource array.
当 Spinner 从数据库中填充时，这种技术绝对有效。我还没有用资源数组尝试过。
回答by RxRick
Figured it out... get the id, then make a DB query:
想通了……获取id，然后进行数据库查询：
String id_string = String.valueOf(id);
thismodel=Pkmodel.getById(id_string, dbModel);
ModelName=thismodel.getDrug();
