该方法findViewById（INT）是不确定的，使用的AsyncTask为Jsoup解析器类型 [英] The method findViewById(int) is undefined for the type using AsyncTask for Jsoup Parser

问题描述

我试图用jsoup来查询网址，我得到以下错误：该方法findViewById（INT）是未定义类型

有什么建议？ （我真的不知道我在做什么错在这一点上还是问题如何进行纠正）

使用例如：

如何使用的AsyncTask为Jsoup分析器？

来源：

 包com.example.httpgetandroidexample;进口java.io.IOException异常;进口org.jsoup.Jsoup;
进口org.jsoup.nodes.Document;
进口org.jsoup.nodes.Element;
进口org.jsoup.select.Elements;进口android.app.Activity;
进口android.app.ProgressDialog;
进口android.content.Context;
进口android.os.AsyncTask;
进口android.os.Bundle;
进口android.util.Log;
进口android.widget.TextView;公共类HttpGetAndroidExample＆LT; AsyncronoustaskAndroidExample＆GT;扩展
        活动{    / **当第一次创建活动调用。 * /
    @覆盖
    公共无效的onCreate（捆绑savedInstanceState）{        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;    }
}公共类HttpGetAndroidExample＆LT; OnCompleteListener＆GT;扩展
        AsyncTask的＆LT;太虚，太虚，太虚＆GT; {
    //此处声明变量您使用用于分析
    私人元素概述= NULL;
    私人元featureList = NULL;
    私人拥有的元素= NULL;
    私人元款= NULL;
    字符串URL =htt​​p://www.sheriff.org/apps/arrest/results.cfm?lname=&fname=;    @覆盖
    保护无效doInBackground（虚空......为arg0）{
        文档DOC = NULL;
        尝试{
            DOC = Jsoup.connect（URL）获得（）;
            概述= doc.select（＃DIV对象概述）最后（）;
            featureList = doc.select（div.callout箱）最后的（）。            功能= featureList.select（「李先生」）;
            ，第一款= overview.select（P）最后（）;
            的System.out.println（paragraph.text（））;
        }赶上（例外五）{
            // TODO自动生成catch块
            e.printStackTrace（）;
        }        //获取段落元素
        // article.setText（paragraph.text（））;我的评论了这一点，因为你
        //无法更新从非UI线程的用户界面，因为doInBackground运行
        //在后台线程。        返回null;
    }    @覆盖
    保护无效onPostExecute（虚空结果）{        TextView的文章=（的TextView）findViewById（R.id.releaseInfo）;
        最终的TextView featuresText =（的TextView）findViewById（R.id.features）;
        对于（元素e：功能）{
            //的setText（）
        }    }}
 

解决方案

显然，你的类不是内部类的活动，因此，你不必访问它的（活动）的方法，如findViewById。你可以做两件事情：

1. 把HttpGetAndroidExample作为私有类的活动在


2. 传递活动作为参数传递给HttpGetAndroidExample并调用需要的时候它的方法。

I'm attempting to query a url using jsoup and I'm getting the following error: The method findViewById(int) is undefined for the type

Any suggestions? (I'm really not sure what I'm doing wrong at this point or how the issue can be corrected)

Using example:

How to use AsyncTask for Jsoup Parser?

SOURCE:

package com.example.httpgetandroidexample;

import java.io.IOException;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class HttpGetAndroidExample<AsyncronoustaskAndroidExample> extends
        Activity {

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

    }
}

public class HttpGetAndroidExample<OnCompleteListener> extends
        AsyncTask<Void, Void, Void> {
    // HERE DECLARE THE VARIABLES YOU USE FOR PARSING
    private Element overview = null;
    private Element featureList = null;
    private Elements features = null;
    private Element paragraph = null;
    String url = "http://www.sheriff.org/apps/arrest/results.cfm?lname=&fname=";

    @Override
    protected Void doInBackground(Void... arg0) {
        Document doc = null;
        try {
            doc = Jsoup.connect(url).get();
            overview = doc.select("div#object-overview").last();
            featureList = doc.select("div.callout-box").last();

            features = featureList.select("li");
            paragraph = overview.select("p").last();
            System.out.println(paragraph.text());
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // Get the paragraph element
        // article.setText(paragraph.text()); I comment this out because you
        // cannot update ui from non-ui thread, since doInBackground is running
        // on background thread.

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {

        TextView article = (TextView) findViewById(R.id.releaseInfo);
        final TextView featuresText = (TextView) findViewById(R.id.features);
        for (Element e : features) {
            // setText()
        }

    }

}

解决方案

Obviously your class is not inner class of the Activity, and therefore you don't have access to its (Activity) methods, such as findViewById. You can do two things:

1. Put HttpGetAndroidExample inside your activity as private class
2. Pass activity as parameter to HttpGetAndroidExample and call it's methods when needed.

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