选择我尝试在特定事件附加到Android android.widget.Spinner安卓：微调对用户
我知道Spinner.setOnItemSelectedListener存在，但没有工作，我想， 与setOnItemSelectedListener的问题是方法调用，而微调器加载一个适配器，并按预定义项目选择。
我想要一个界面来获取事件，而“用户”通过使用tuch屏幕从微调器中选择一个项目。此外，只有在使用时选择一个项目而不是程序选择一个项目时才会调用该事件。
我想要一个事件，当使用从这个微调对话框中选择一个项目时调用。
我终于发现，我工作在代码上http://www.oschina.net/code/explore/android-4.0.1/core/java/android/widget/Spinner.java
的解决方案，通过看我发现如何防止或附加更多代码到运行的代码部分，而使用会显示下拉列表，然后创建我的o Spinner的新实例。
我的微调控件类有一个使用定义界面OnSelectSpinnerListener，用户在旋转微调器并从微调列表中选择一个项目时将会运行。
/**
* Create a DropDown Spinner/Select List, that also has some event for detect
* action do by the use and action do by the system.
*
* Use {@link OnSelectSpinnerListener} for attach a listener to this
* SelectSpinner.
*/
public class SelectSpinner extends Spinner {
public interface OnSelectSpinnerListener {
/**
* Call before the drop down menu is show that allow use to select one
* of the item from the Spinner.
*/
public void onOpenSelectMenu();
/**
* Call while the use press a button or item for select this. This will
* not be call while the system set a select value for the spinner. Use {@link SelectSpinner#setOnItemSelectedListener(android.widget.AdapterView.OnItemSelectedListener)}
* for get all event while a item is set to the spinner.
*
* @param index Select item as Index
* @param object Select item as Object
*/
public void onItemSelectByUser(int index, Object object);
}
private OnSelectSpinnerListener onSelectSpinnerListener;
public SelectSpinner(Context context) {
super(context);
}
public SelectSpinner(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SelectSpinner(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public OnSelectSpinnerListener getOnSelectSpinnerListener() {
return onSelectSpinnerListener;
}
public void setOnSelectSpinnerListener(OnSelectSpinnerListener onSelectSpinnerListener) {
this.onSelectSpinnerListener = onSelectSpinnerListener;
}
@Override
public void onClick(DialogInterface dialog, int which) {
super.onClick(dialog, which);
if (this.onSelectSpinnerListener != null) {
Object item = super.getItemAtPosition(which);
this.onSelectSpinnerListener.onItemSelectByUser(which, item);
}
}
@Override
public boolean performClick() {
if (this.onSelectSpinnerListener != null) {
this.onSelectSpinnerListener.onOpenSelectMenu();
}
return super.performClick();
}
}
spinner.setOnItemSelectedListener(this)
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
//here arg2 will return the number of option which user select
spinner.setOnItemSelectedListener（新OnItemSelectedListener（）{
switch (arg2) {
case 0:
// do something for london
Toast.makeText(getApplicationContext(), "London",Toast.LENGTH_SHORT).show();
break;
case 1:
// do something for Paris
Toast.makeText(getApplicationContext(), "Paris",Toast.LENGTH_SHORT).show();
break;
case 2:
// do something for Stockholm
Toast.makeText(getApplicationContext(), "Stockholm",Toast.LENGTH_SHORT).show();
break;
default:
break;
}
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub enter code here
}
我不能正确理解你的问题。如果这不是你的正确答案，那么请澄清这个问题，当用户从微调器中选择选项时你想要做什么。感谢名单。 –
是的，但我所说的'setOnItemSelectedListener'现在不适用于我，现在基于此将在Spinner创建并加载项目时调用，我想要一个仅在调用时才会调用的事件该项目。 –
希望它能帮助你...这就是你想要的 –
正如this此事提到onClick()不工作开始，但近期的Android版本（我测试了它的一些版本4.0）。
所以我适应谁在android系统的新版本适用于this FIG-GHD742答案（上4.1和4.3测试）：
public class SelectSpinner extends Spinner {
public interface OnSelectSpinnerListener {
public void onOpenSelectMenu();
public void onItemSelectByUser(AdapterView<?> parent, View view,
int position, long id);
}
private boolean isUserOpen = false;
private List<OnSelectSpinnerListener> onSelectSpinnerListeners;
private OnItemSelectedListener onItemSelectedListener;
public SelectSpinner(Context context) {
super(context);
registerEvents();
}
public SelectSpinner(Context context, AttributeSet attrs) {
super(context, attrs);
registerEvents();
}
public SelectSpinner(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
registerEvents();
}
/**
* Register default events
* */
private void registerEvents() {
// overrides the default event for android OnItemSelectedListener
super.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
if (onItemSelectedListener != null) {
// call onItemSelected default event in android
onItemSelectedListener.onItemSelected(parent, view,
position, id);
}
// checks if the spinner selection is opened by the user and has event listener
if (isUserOpen && onSelectSpinnerListeners != null) {
for (OnSelectSpinnerListener listener : onSelectSpinnerListeners) {
listener.onItemSelectByUser(parent, view, position, id);
}
isUserOpen = false;
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
if (onItemSelectedListener != null) {
// call onNothingSelected default event in android
onItemSelectedListener.onNothingSelected(parent);
}
}
});
}
public void addOnSelectSpinnerListener(
OnSelectSpinnerListener onSelectSpinnerListener) {
if (this.onSelectSpinnerListeners == null) {
this.onSelectSpinnerListeners = new ArrayList<SelectSpinner.OnSelectSpinnerListener>();
}
this.onSelectSpinnerListeners.add(onSelectSpinnerListener);
}
@Override
public void setOnItemSelectedListener(OnItemSelectedListener listener) {
this.onItemSelectedListener = listener;
}
@Override
public boolean performClick() {
// isUserOpen variable set to true, to indicate that there was user interaction
isUserOpen = true;
if (this.onSelectSpinnerListeners != null) {
for (OnSelectSpinnerListener listener : this.onSelectSpinnerListeners) {
// call onOpenSelectMenu event
listener.onOpenSelectMenu();
}
}
return super.performClick();
}
}
这不适用于最新的android版本，onClick永远不会被调用。 –
我发布[此]（http://stackoverflow.com/a/24679564/2290538）回答适用于更新版本的Android 4.0+ –