Question

有没有办法打破AsyncTaskResult＆gt;＆gt; 进入列表？或者得到30,40，......它的价值只有？

我有一个Async类，它将webservice fetch的结果返回给适配器。现在因为巨大的数据我希望将结果分成单独的段并传递异步类的结果数。

这是myasync类：

protected AsyncTaskResult<ArrayList<HashMap<String, String>>> doInBackground(
        String... arg0) {

        String xml = "Get String from my web service class"
        myXmlParsingClass myparser = new myXmlParsingClass (xml, "getitem");
        myparser .runParser();

        AsyncTaskResult<ArrayList<HashMap<String, String>>> myresult = new AsyncTaskResult<ArrayList<HashMap<String, String>>>(myXmlParsingClass .getParsedData());

        return myresult ;

    }

和我的asynctaskresult：

public class AsyncTaskResult<T> {
    private T result = null;
    private Exception error = null;

    public T getResult() {
        return result;
    }

    public Exception getError() {
        return error;
    }

    public AsyncTaskResult(T result) {
        super();
        this.result = result;
    }

    public AsyncTaskResult() {
        super();
    }

    public AsyncTaskResult(Exception error) {
        super();
        this.error = error;
    }

这是我到目前为止所做的：在我的适配器里面的getview方法中，我做了第二个方法将一个数字传递给异步类：

MyAsyncClass ma = new MyAsyncClass(myview,userid,5);

MyAsyncClass中的

：

public MyAsyncClass ( View context,String _id) {
    this.targetCtx = context ;
    id = _id;
}

public MyAsyncClass ( View context,String _id,int _ID_To_Show) {
    this.targetCtx = context ;
    id = _id;
    ID_To_Show= _ID_To_Show;
}

和PostExecute方法：

if(ID_To_Show >0 ){
     MySecondAdapter Madapter = new MySecondAdapter(targetCtx,        myresult.getResult(),ID_To_Show);
     mylist.setAdapter(Madapter);
   }else{
   MySecondAdapter Madapter = new MySecondAdapter(targetCtx, myresult.getResult());
   mylist.setAdapter(Madapter);

最后在MySecondAdapter中添加了这个：

public MySecondAdapter(View a, ArrayList<HashMap<String, String>> id,int _ID_To_Show) {
    idfromhayoolafetch = id;
    myinflater = (LayoutInflater) AppContext.getAppContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    ID_To_Show= _ID_To_Show;
}
public MySecondAdapter(View a, ArrayList<HashMap<String, String>> id) {
    idfromhayoolafetch = id;
    myinflater = (LayoutInflater) AppContext.getAppContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
    if(ID_To_Show>0){
        return ID_To_Show;  
    }else{
    return idfromhayoolafetch.size();
    }
    }

此approch显示我想在每次通话中显示的项目数量，我可以将值传递给它但其他方式我可以做到这一点？问题是我不能要求hayoola限制回应的价值。

Answer 1

这样的请求应由服务器自己处理。因为服务器应该接受要返回的项目数，并且只发送那么多项。

但是如果你想要异步任务来处理它，你仍然可以执行以下操作：

protected AsyncTaskResult<ArrayList<HashMap<String, String>>> doInBackground(
        String... arg0) {

        String xml = "Get String from my web service class"
        myXmlParsingClass myparser = new myXmlParsingClass (xml, "getitem");
        myparser .runParser();

        AsyncTaskResult<ArrayList<HashMap<String, String>>> myresult = new AsyncTaskResult<ArrayList<HashMap<String, String>>>(myXmlParsingClass .getParsedData());
        ArrayList<HashMap<String, String>> result=myresult.getResult();
        myresult.setResult(result.subList(0,maxItems));//maxItems=30 set it while creating async task object
        return myresult ;

    }

Break AsyncTaskResult <arraylist <hashmap <string，string =“”>＆gt;＆gt;到另一个列表</arraylist <hashmap <string，>

1 个答案: