我有一个适配器(扩展BaseAdapter),我试图调用notifyDataSetChanged(),但它不起作用。我相信notifyDataSetChanged()实际上是被调用的,基于使用Eclipse调试器进入它。但是,它不会调用getView()。我的适配器下面的数据正在改变,正如它应该的那样。我在适配器中有一个方法updateSettings(),用于更新适配器底层的数据。如果我从ListViewActivity调用updateSettings(),我没有任何问题... notifyDataSetChanged()的行为与我期望的一样。但是当我从适配器中调用updateSettings()时,notifyDataSetChanged()不起作用。我是否尝试从适配器中调用notifyDataSetChanged()来做一些根本错误的事情?这是我的一些代码:
public View getView( int position, View convertView, ViewGroup parent )
{
Log.d( CLASS_NAME, "Entered getView()" );
View row = convertView;
_settingViewHolder = new PhoneSettingViewHolder();
final int index = position;
/* If this is the first time the list is being built, get all of the UI widgets
* and store them in a PhoneSettingViewHolder object for future use on
* subsequent writing of the list.
*/
if( row == null )
{
LayoutInflater inflater = (LayoutInflater)_context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
row = inflater.inflate( R.layout.phone_list_complex, null, false );
_settingViewHolder.txtSettingName = (TextView)row.findViewById( R.id.phone_list_complex_title );
_settingViewHolder.txtSettingValue = (TextView)row.findViewById( R.id.phone_list_complex_caption );
_settingViewHolder.sbTimeout = (SeekBar)row.findViewById( R.id.slider );
_settingViewHolder.txtPercent = (TextView)row.findViewById( R.id.percent );
_settingViewHolder.sbTimeout.setMax( 30 );
_settingViewHolder.sbTimeout.setProgress( 1 );
// associate this PhoneSettingViewHolder object with the row
row.setTag( _settingViewHolder );
}
else
{
// get the PhoneSettingViewHolder object that is associated with this row
_settingViewHolder = (PhoneSettingViewHolder)row.getTag();
}
// get Setting object and store values in PhoneSettingViewHolder object
final Setting setting = _settings.get( position );
_settingViewHolder.txtSettingName.setText( setting.getSettingName() );
Log.d( CLASS_NAME, "setting.getSettingValue() = " + setting.getSettingValue() );
_settingViewHolder.txtSettingValue.setText( setting.getSettingValue() );
/* Event handlers for SeekBar */
_settingViewHolder.sbTimeout.setOnSeekBarChangeListener( new OnSeekBarChangeListener() {
public void onProgressChanged( SeekBar seekBar, int progress, boolean isUser )
{
Log.d( CLASS_NAME, "Entered onProgressChanged()" );
String percent = String.valueOf( progress );
updateSettings( index, percent );
}
public void onStartTrackingTouch( SeekBar seekBar )
{
// Nothing to do here
}
public void onStopTrackingTouch( SeekBar seekBar )
{
// Nothing to do here
}
});
return row;
}
在这个块中,我设置了行视图并将事件处理程序附加到SeekBar。我想要发生的是当有人滚动SeekBar时,它会更新它上面的文本。这是我的updateSettings()方法:
public void updateSettings( int index, String progress )
{
Log.d( CLASS_NAME, "Entered updateSettings()" );
Setting setting = new Setting( SETTING_NAME, progress );
_settings.set( index, setting );
Log.d( CLASS_NAME, "Calling notifyDataSetChanged()" );
notifyDataSetChanged();
Log.d( CLASS_NAME, "Returned from notifyDataSetChanged()" );
}
非常感谢任何见解!
谢谢。
答案 0 :(得分:12)
添加
notifyDataSetChanged()
**您的适配器内部,应用程序将重新加载您的列表。
^^
答案 1 :(得分:3)
我遇到同样的问题,解决方法是:
不要在适配器内调用NotifyDataSetChanged()
使用listView.getAdapter().notiftDataSetChanged()
它会起作用。
答案 2 :(得分:1)
我只是添加
adapter.notifyDataSetChanged()
onBindViewHolder()中的onCLick,它对我有用〜
答案 3 :(得分:0)
您必须以这种方式致电notifyDataSetChanged()
:
ArrayAdapter<String> adapter; // where adapter - your adapter
adapter = new ArrayAdapter<String>(...);
adapter.notifyDataSetChanged();
答案 4 :(得分:0)
感谢所有关注我问题的人。我希望这个解决方案可以帮助其他人。
我使用适配器作为分隔列表,它管理列表不同部分的适配器。我遇到问题的适配器是托管适配器之一。
我所做的是制作一个回调函数(在Java中),用于处理滚动SeekBar时的情况。我用我的适配器注册了它,所以当它被调用时,它调用adapter.notifyDataSetChanged:
public void eventNotifier( InterestingEvent event )
{
_event = event; // register event handler
}
class NotifyDataSetChangedEvent implements InterestingEvent {
private final String CLASS_NAME = "NotifyDataSetChangedEvent";
public void interestingEventHappened()
{
Log.d( CLASS_NAME, "Entered interestingEventHappened()");
_adapter.notifyDataSetChanged();
}
}
谢谢:)