确定。所以我试图访问一些在线存在的公共记录并将它们导入Android。它们目前作为公共可用的Web服务存在，它返回一个HTML页面，其中包含一个表格，我使用jSoup将其拉入我的应用程序，其中包含指向另一个页面的链接，其中包含我想要抓取的实际数据。到目前为止，我已经构建了一个刮刀，它可以从第一个HTML页面中删除数据，从表中提取并将其显示为textview01。我需要做的就是按照该链接并在textview02中显示重定向页面的数据。
我知道这既简单又困难 - 任何帮助都非常感谢！
package com.example.test;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.jsoup.Jsoup;
import org.jsoup.Connection.Response;
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.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView tv;
TextView tv2;
String url = "http://sheriff.org/apps/arrest/results.cfm?lname=AARON&fname=";
String tr;
Document doc;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.TextView01);
tv = (TextView) findViewById(R.id.TextView02);
new MyTask().execute(url);
}
private class MyTask extends AsyncTask<String, Void, String> {
ProgressDialog prog;
String title = "";
@Override
protected void onPreExecute() {
prog = new ProgressDialog(MainActivity.this);
prog.setMessage("Loading....");
prog.show();
}
private Document manualRedirectHandler(String url) throws IOException{
Response response = Jsoup.connect(url.replaceAll(" ", "%20")).followRedirects(false).execute();
int status = response.statusCode();
if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM || status == HttpURLConnection.HTTP_SEE_OTHER)
{
String redirectUrl = response.header("location");
System.out.println("Redirect to: " + redirectUrl);//key will be here
return manualRedirectHandler(redirectUrl);
}
return Jsoup.parse(response.body());
}
@Override
protected String doInBackground(String... params) {
ImageView img = (ImageView) findViewById(R.id.imageView1);
{
try {
manualRedirectHandler(url);
String imageURL = "http://exampleurl.com/icon.jpg"; // this needs to display the user's image from the redirected page
HttpGet httpRequest = null;
httpRequest = new HttpGet(URI.create(imageURL));
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = (HttpResponse) httpclient
.execute(httpRequest);
HttpEntity entity = response.getEntity();
BufferedHttpEntity b_entity = new BufferedHttpEntity(entity);
InputStream input = b_entity.getContent();
Bitmap bitmap = BitmapFactory.decodeStream(input);
img.setImageBitmap(bitmap);
doc = Jsoup.connect(params[0]).get();
Element tableElement = doc.select(".datagrid").first();
Elements tableRows = tableElement.select("tr");
for (Element row : tableRows) {
Elements cells = row.select("td");
if (cells.size() > 0) {
title = cells.get(0).child(0).attr("href") + " ; "
+ cells.get(0).text() + "; "
+ cells.get(1).text() + "; "
+ cells.get(2).text() + "; "
+ cells.get(3).text();
}
}
} catch (IOException e) {
e.printStackTrace();
}
return title;
}
}
@Override
protected void onPostExecute(String title) {
super.onPostExecute(title);
prog.dismiss();
tv.setText(title);
// tv2.setText(title2); - this needs work - I need to update this textview with the table data from the URL obtained after redirect
}
}
}
第一反应后的编辑/答案：
public class MainActivity extends Activity {
TextView tv;
TextView tv2;
String url = "http://sheriff.org/apps/arrest/results.cfm?lname=hello&fname=";
String tr;
Document doc = Jsoup.connect(url).data("lname", "LastNameFromUser").data("firstname","fname").post();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.TextView01);
tv = (TextView) findViewById(R.id.TextView02);
new MyTask().execute(url);
}
private class MyTask extends AsyncTask<String, Void, String> {
ProgressDialog prog;
String title = "";
@Override
protected void onPreExecute() {
prog = new ProgressDialog(MainActivity.this);
prog.setMessage("Loading....");
prog.show();
}
private Document manualRedirectHandler(String url) throws IOException{
Response response = Jsoup.connect(url.replaceAll(" ", "%20")).followRedirects(false).execute();
int status = response.statusCode();
if (status == HttpURLConnection.HTTP_MOVED_TEMP || status == HttpURLConnection.HTTP_MOVED_PERM || status == HttpURLConnection.HTTP_SEE_OTHER)
{
String redirectUrl = response.header("location");
System.out.println("Redirect to: " + redirectUrl);//key will be here
return manualRedirectHandler(redirectUrl);
}
return Jsoup.parse(response.body());
}
@Override
protected String doInBackground(String... params) {
ImageView img = (ImageView) findViewById(R.id.imageView1);
{
try {
manualRedirectHandler(url);
String imageURL = "http://exampleurl.com/icon.jpg"; // this needs to display the user's image from the redirected page
HttpGet httpRequest = null;
httpRequest = new HttpGet(URI.create(imageURL));
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = (HttpResponse) httpclient
.execute(httpRequest);
HttpEntity entity = response.getEntity();
BufferedHttpEntity b_entity = new BufferedHttpEntity(entity);
InputStream input = b_entity.getContent();
Bitmap bitmap = BitmapFactory.decodeStream(input);
img.setImageBitmap(bitmap);
doc = Jsoup.connect(params[0]).get();
Element tableElement = doc.select(".datagrid").first();
Elements tableRows = tableElement.select("tr");
for (Element row : tableRows) {
Elements cells = row.select("td");
if (cells.size() > 0) {
title = cells.get(0).child(0).attr("href") + " ; "
+ cells.get(0).text() + "; "
+ cells.get(1).text() + "; "
+ cells.get(2).text() + "; "
+ cells.get(3).text();
}
}
} catch (IOException e) {
e.printStackTrace();
}
return title;
}
}
@Override
protected void onPostExecute(String title) {
super.onPostExecute(title);
prog.dismiss();
tv.setText(title);
// tv2.setText(title2); - this needs work - I need to update this textview with the table data from the URL obtained after redirect
}
}
}
结果：
“默认构造函数无法处理由隐式超级构造函数抛出的异常类型IOException。必须在行上定义一个显式构造函数：
Document doc = Jsoup.connect(url).data("lname", "LastNameFromUser").data("firstname","fname").post();
答案 0 :(得分：0)
我在这里创建了类似的内容：https://play.google.com/store/apps/details?id=com.search.wisconsinccap&hl=en
要做到这一点，你需要做类似的事情。
/*Assuming you are using post()*/
String url = "http://sheriff.org/apps/arrest/results.cfm?lname=hello&fname=";
Document doc = Jsoup.connect(url).data("lname", "LastNameFromUser").data("fname","FirstNameFromUser").post();
EDIT 重试上面的代码片段。您也可以只构建URL，然后连接到该URL。
此代码正在运作：
import java.io.IOException;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
public class SheriffParser {
private String firstName;
private String lastName;
public static final String URL = "http://sheriff.org/apps/arrest/results.cfm?";
public SheriffParser(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Elements fillOutForm() throws IOException {
return Jsoup.connect(this.URL).data("lname", this.lastName)
.data("fname", this.firstName).post().select("tbody");
}
public static void main(String[] args) throws IOException {
String url = "http://sheriff.org/apps/arrest/results.cfm?";
SheriffParser parser = new SheriffParser("InsertFirstName","InsertLastName");
System.out.println(parser.fillOutForm().toString());
}
}
这将为您提供表格，然后您使用解析算法来分隔类别。您应该创建另一个类，其中包含Arrest No.，Name，Sex，Location as Parameters。
请考虑将您的Activity分解为多个类并使用更好的命名约定。这将使您能够更好地诊断错误，并使代码更具可读性。