Java notifydatasetchanged后未调用getview

因此，我正在处理一个实时列表视图，我需要在单击按钮时更新列表视图，所以执行了以下操作：

private void ReloadData(){
    DataList.clear();
    try{
        for (int i =0;i<ItemsCount;i++){
            TempItem=new STRUCTS.STRUCT_ProductItem();
            TempItem.setName(dbh.ReadDefine(ProductID,i+"","name")+"");//Read name if there is any set
            TempItem.setImgs(Uri.parse(dbh.ReadDefine(ProductID,i+"","img")+""));//Read image if there is any set
            TempItem.setInfo("PR"+i);//Desc

            Log.i("TAG", "ReloadData: "+IsOn[i]);//Is product avalible

            TempItem.setToggled(IsOn[i]);
            DataList.add(TempItem);

        }
    }catch (Exception ex){
        ex.printStackTrace();
        Log.e("ERRORCATCHER", "OnForLoop (Fill Product Data): "+ex.getMessage() );
    }
    //


    if(!IsAdapterSet){

        adapter = new LISTCUSTOM_ProductITEM(MyActivity.this,DataList);
        list.setAdapter(adapter);


        IsAdapterSet=true;
    }else{


        try {


            adapter.swapItems(DataList);


        } catch (Exception e) {
            e.printStackTrace();
        }

    }


}

当我点击该按钮时，它不会更新日志视图，也不会更改任何listview元素

但是，当我滚动listview使项目不可见时，我会向后滚动，因为它们的数据会更新

当项目失去可见性，然后再次获得它时，运行GetView

为什么Notifydatachanged不会在我的自定义适配器上更新UI/运行GetView？

请尝试编写此代码

     private void ReloadData(){
        DataList.clear();
        if(!IsAdapterSet){

    adapter = new LISTCUSTOM_ProductITEM(MyActivity.this,DataList);
    list.setAdapter(adapter);


    IsAdapterSet=true;
}
        try{
            for (int i =0;i<ItemsCount;i++){
                TempItem=new STRUCTS.STRUCT_ProductItem();
                TempItem.setName(dbh.ReadDefine(ProductID,i+"","name")+"");//Read name if there is any set
                TempItem.setImgs(Uri.parse(dbh.ReadDefine(ProductID,i+"","img")+""));//Read image if there is any set
                TempItem.setInfo("PR"+i);//Desc

                Log.i("TAG", "ReloadData: "+IsOn[i]);//Is product avalible

                TempItem.setToggled(IsOn[i]);
                DataList.add(TempItem);

            }
        adapter.swapItems(DataList);
        }catch (Exception ex){
            ex.printStackTrace();
            Log.e("ERRORCATCHER", "OnForLoop (Fill Product Data): "+ex.getMessage() );
        }


    }
    }

private void ReloadData（）{
DataList.clear（）；
如果（！IsAdapterSet）{
adapter=new LISTCUSTOM\u ProductITEM（MyActivity.this，DataList）；
list.setAdapter（适配器）；
IsAdapterSet=true；
}
试一试{
对于（inti=0；i试试这个

private void ReloadData(){
    ArrayList<STRUCTS.STRUCT_ProductItem> list = new ArrayList<>;
    try {
        for (int i =0;i<ItemsCount;i++) {
            TempItem= new STRUCTS.STRUCT_ProductItem();
            TempItem.setName(dbh.ReadDefine(ProductID,i+"","name")+"");//Read name if there is any set
            TempItem.setImgs(Uri.parse(dbh.ReadDefine(ProductID,i+"","img")+""));//Read image if there is any set
            TempItem.setInfo("PR"+i);//Desc

            Log.i("TAG", "ReloadData: "+IsOn[i]);//Is product avalible

            TempItem.setToggled(IsOn[i]);
            list.add(TempItem);
        }
    } catch (Exception ex){
        ex.printStackTrace();
        Log.e("ERRORCATCHER", "OnForLoop (Fill Product Data): "+ex.getMessage() );
    }

    DataList.clear();
    DataList.addAll(list);

    adapter.notifyDataSetChanged();
}

private void ReloadData（）{
ArrayList=新的ArrayList；
试一试{
对于（int i=0；首先清除
DataList
中的项目，然后使用
DataList.addAll（list.getData（））
；运行NOTIFYDATASETCHANGE时，它会使列表滚动到第一个，并且GetView不会运行。它实际上会使情况变得更糟？DataList.addAll没有首先清除它？它使我的列表中充满了重复的项，但仍然没有working@Disco4uf在适配器DataList.addAll（列表）中更改代码；在您以前的代码中我以为您要添加以前的数据新数据
     private void ReloadData(){
        DataList.clear();
        if(!IsAdapterSet){

    adapter = new LISTCUSTOM_ProductITEM(MyActivity.this,DataList);
    list.setAdapter(adapter);


    IsAdapterSet=true;
}
        try{
            for (int i =0;i<ItemsCount;i++){
                TempItem=new STRUCTS.STRUCT_ProductItem();
                TempItem.setName(dbh.ReadDefine(ProductID,i+"","name")+"");//Read name if there is any set
                TempItem.setImgs(Uri.parse(dbh.ReadDefine(ProductID,i+"","img")+""));//Read image if there is any set
                TempItem.setInfo("PR"+i);//Desc

                Log.i("TAG", "ReloadData: "+IsOn[i]);//Is product avalible

                TempItem.setToggled(IsOn[i]);
                DataList.add(TempItem);

            }
        adapter.swapItems(DataList);
        }catch (Exception ex){
            ex.printStackTrace();
            Log.e("ERRORCATCHER", "OnForLoop (Fill Product Data): "+ex.getMessage() );
        }


    }
    }

public void swapItems(ArrayList<STRUCTS.STRUCT_ProductItem> list) throws InterruptedException {
DataList.addAll(list);
this.notifyDataSetChanged();

private void ReloadData(){
    ArrayList<STRUCTS.STRUCT_ProductItem> list = new ArrayList<>;
    try {
        for (int i =0;i<ItemsCount;i++) {
            TempItem= new STRUCTS.STRUCT_ProductItem();
            TempItem.setName(dbh.ReadDefine(ProductID,i+"","name")+"");//Read name if there is any set
            TempItem.setImgs(Uri.parse(dbh.ReadDefine(ProductID,i+"","img")+""));//Read image if there is any set
            TempItem.setInfo("PR"+i);//Desc

            Log.i("TAG", "ReloadData: "+IsOn[i]);//Is product avalible

            TempItem.setToggled(IsOn[i]);
            list.add(TempItem);
        }
    } catch (Exception ex){
        ex.printStackTrace();
        Log.e("ERRORCATCHER", "OnForLoop (Fill Product Data): "+ex.getMessage() );
    }

    DataList.clear();
    DataList.addAll(list);

    adapter.notifyDataSetChanged();
}