我正在尝试为Android创建一个应用程序,用户可以将信息输入到几个文本区域,然后单击“提交”,应用程序会将信息发送到URL。输入将具有变量名称,以便PHP脚本可以在另一端获取它。这通常在具有HTML表单的网站上完成,但希望能够从应用程序执行此操作。我已经研究了如何创建输入区域和按钮,但尝试将其发送到URL时有点卡住。任何建议将不胜感激,谢谢。
答案 0 :(得分:0)
我前一段时间做了一个课程,以简化发布请求的所有工作:
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Vector;
public class SiteFX {
private String postParameters = "";
private String webPage;
private Vector<String>names;
private Vector<String>values;
public SiteFX(){
values = new Vector<String>();
names = new Vector<String>();
}
/**
* Adds a post variable (page.php?name=value)
*
* @param name the variable name
* @param value the variable value, can be set to null, the url will simply become &name instead of &name=value
* null
*/
public void addPostValue(String name, String value) {
if (value == null) {
try {
postParameters += "&" + URLEncoder.encode(name, "UTF-8");
names.add(name);
values.add("");
} catch (Exception ex) {
ex.printStackTrace();
}
} else {
postParameters += "&" + URLEncoder.encode(name, "UTF-8") + "=" + URLEncoder.encode(value, "UTF-8");
names.add(name);
values.add(value);
}
}
/**
* Send post data without waiting for site output
*
* @return true if sending data terminated succesfully
*/
public boolean sendPost() {
try {
if (webPage == null || webPage.equals("")) {
throw new Exception("Empty url");
}
URL url = new URL(webPage);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(postParameters);
wr.flush();
} catch (Exception e) {
e.printStackTrace();
return false;
}
postParameters = "";
return true;
}
/**
* Sends data, then waits for site output
*
* @return null if no data is received, or a String containing the data
*/
public String sendPostWithReturnValue() {
String returnValue = "";
try {
if (webPage == null || webPage.equals("")) {
throw new Exception("Empty url");
}
URL url = new URL(webPage);
URLConnection conn =
url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr =
new OutputStreamWriter(conn.getOutputStream());
wr.write(postParameters);
wr.flush();
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
returnValue += line + "\n";
}
wr.close();
rd.close();
} catch (Exception e) {
e.printStackTrace();
return null;
}
postParameters = "";
values = null;
names=null;
values = new Vector<String>();
names = new Vector<String>();
return returnValue;
}
/**
* Sets the page to point at for sending post variables
*
* @param webPageToPointAt the page that will receive your post data
*/
public void setWebPageToPointAt(String webPageToPointAt) {
webPage = webPageToPointAt;
}
/**
* @returns A Nx2 matrix containing all parameters name and values
*/
public String[][] getParameters() {
String[][] str = new String[names.size()][2];
for (int i = 0; i < str.length; i++) {
str[i][0] = names.get(i);
str[i][1] = values.get(i);
}
return str;
}
}
希望这有帮助