Android fragment spinner 修改默认显示的文本内容

来源：互联网发布：软件数据线6.0 编辑：程序博客网时间：2024/05/22 01:37

我不得不说spinner是一个坑，很多东西和api都挺不好用的，只是在界面的展示上面给了我们一个便利，其余关于触发、默认显示的文本、更改默认显示的文本都有很多坑。我的需求是这样的，首次进入这个界面，spinner当然是显示默认的第一条数据，当我点击了修改的界面，这个显示的日期需要传递到spinner进行显示，也就是要修改默认显示的spinner文本，关键在于如下代码：

Spinner.setAdapter(expireTimeAdapter);Adapter.notifyDataSetChanged(); // 通知spinner刷新数据Spinner.setSelection(0, true);

也就是重新设置适配器，然后通知spinner更新列表数据，然后将第几行选中，spinner.setSelecttion(0,true)这个方法如果改成spinner.setSelection(0)是不会触发spinner的列表点击事件的，需要后面加一个参数true，意思是立即执行这个下拉列表的点击事件。感谢如下两篇博文：

androd spinner 更新默认文本

spinner.setselecttion方法的含义

我的主要代码如下：

package ****；import java.text.ParseException;import java.text.SimpleDateFormat;public class PriceWarning2ModifyFragment extends ControlFragment implementsStationEventListener {private void setEffectDataForSpinner(View view) {// **********第2个下拉列表，有效日期************expireTimeSpinner = (Spinner) view.findViewById(R.id.effectivedate);// 将可选内容与ArrayAdapter连接起来expireTimeAdapter = new ArrayAdapter<String>(getActivity(),R.layout.activity_tipsprice_spinner, m);// //设置下拉列表的风格expireTimeAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);// 将adapter 添加到spinner中expireTimeSpinner.setAdapter(expireTimeAdapter);// 添加事件Spinner事件监听expireTimeSpinner.setOnItemSelectedListener(new effectivedateSpinnerSelectedListener());expireTimeSpinner.setSelection(0, true);// 设置默认值expireTimeSpinner.setVisibility(View.VISIBLE);}// 使用数组形式操作class effectivedateSpinnerSelectedListener implementsOnItemSelectedListener {@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,long arg3) {switch (arg2) {case 0:int flagmodify = DocCaptain.getInstance().getPricemodify();if (flagmodify == 0) {if (modipriceType == CommDataInterface.ORDER_EXPIRE_TYPE_USER_DEFINED) {((TextView) arg1).setText(timeAddPrice);} else if (modipriceType == CommDataInterface.ORDER_EXPIRE_TYPE_DAY) {((TextView) arg1).setText("N");} else if (modipriceType == CommDataInterface.ORDER_EXPIRE_TYPE_WEEK) {((TextView) arg1).setText("");} else {((TextView) arg1).setText("效");}break;} else {DocCaptain.getInstance().setPricemodify(1);effectivetype = CommDataInterface.ORDER_EXPIRE_TYPE_USER_DEFINED;effectivetime = chooseDate(1);String effectivetimeOne = TimeUtil.formatTime(effectivetime);((TextView) arg1).setText(effectivetimeOne);break;}case 1:effectivetype = CommDataInterface.ORDER_EXPIRE_TYPE_USER_DEFINED;effectivetime = chooseDate(2);String effectivetimeTwo = TimeUtil.formatTime(effectivetime);((TextView) arg1).setText(effectivetimeTwo);break;default:break;}}private Date chooseDate(int hours) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Calendar ca = Calendar.getInstance();ca.setTime(new Date());ca.add(Calendar.HOUR_OF_DAY, hours);return ca.getTime();}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {}}// 当界面隐藏之后重新show，监听@Overridepublic void onHiddenChanged(boolean hidd) {if (!hidd) {if (getActivity() != null) {// 从界面传递参数过来modipriceType = DocCaptain.getInstance().getModieffType();modiamount = DocCaptain.getInstance().getModiamount();instrument = DocCaptain.getInstance().getModifyTipspriceInstrument();guid = DocCaptain.getInstance().getGuid();timeAddPrice = DocCaptain.getInstance().getModieffTime();if (modipriceType == 0) {expireTimeSpinner.setAdapter(expireTimeAdapter);expireTimeAdapter.notifyDataSetChanged(); // 通知spinner刷新数据expireTimeSpinner.setSelection(0, true);} else if (modipriceType == 1) {expireTimeSpinner.setSelection(6);} else if (modipriceType == 2) {expireTimeSpinner.setSelection(7);} else {expireTimeSpinner.setAdapter(expireTimeAdapter);expireTimeAdapter.notifyDataSetChanged(); // 通知spinner刷新数据expireTimeSpinner.setSelection(0, true);}loadPriceWaringData();refreshPriceWarningUI();}}}}

有问题可以沟通。

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