在Android中,我试图用监听器获取所选的Spinner值。
获得转轮价值的最佳方法是什么?
是的,你可以通过setOnItemSelectedListener()注册一个监听器,如在这里所示。
setOnItemSelectedListener()
当某些东西被选中时,Spinner应该触发一个"OnItemSelected"事件:
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { Object item = parent.getItemAtPosition(pos); } public void onNothingSelected(AdapterView<?> parent) { } });
Spinner mySpinner = (Spinner) findViewById(R.id.your_spinner); String text = mySpinner.getSelectedItem().toString();
View view =(View) getActivity().findViewById(controlId); Spinner spinner = (Spinner)view.findViewById(R.id.spinner1); String valToSet = spinner.getSelectedItem().toString();
如果你已经知道项目是String,我更喜欢:
String
String itemText = (String) mySpinner.getSelectedItem();
在你知道是String的Object上调用toString()似乎比将Object强制转换为String更迂回。
Object
toString()
说这是你的xml与旋转条目(即。标题)和价值:
<resources> <string-array name="size_entries"> <item>Small</item> <item>Medium</item> <item>Large</item> </string-array> <string-array name="size_values"> <item>12</item> <item>16</item> <item>20</item> </string-array> </resources>
这是你的旋转器:
<Spinner android:id="@+id/size_spinner" android:layout_width="wrap_content" android:layout_height="wrap_content" android:entries="@array/size_entries" />
然后在代码中获取条目:
Spinner spinner = (Spinner) findViewById(R.id.size_spinner); String size = spinner.getSelectedItem().toString(); // Small, Medium, Large
为了得到这些值:
int spinner_pos = spinner.getSelectedItemPosition(); String[] size_values = getResources().getStringArray(R.array.size_values); int size = Integer.valueOf(size_values[spinner_pos]); // 12, 16, 20
将setOnItemSelectedListener添加到spinner引用中,并获得这样的数据
mSizeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> adapterView, View view, int position, long l) { selectedSize=adapterView.getItemAtPosition(position).toString();