【发布时间】:2019-10-18 10:17:01
【问题描述】:
我一直在尝试将我的 android 应用程序连接到 php 服务器。我创建了一个 php 服务器 echo "Connection success" 以便我可以检索相同的文本并将其显示在我的 android 应用程序中的 Alertbox 中。我有一个带有.cf 的网站,每次连接时应用程序都会关闭。
我检查了我的代码没有发现任何问题,然后我尝试了一个.com 网站,并且该应用程序成功地能够检索页面上显示的任何内容的 html 表单。那么有什么东西可以阻止HttpURLconnection 表单连接到非@ 987654327@网站。
这里是代码。
public class BackgroundWorker extends AsyncTask<String,Void,String> {
Context context;
AlertDialog alertDialog;
BackgroundWorker (Context ctx) {
context = ctx;
}//takes context as an argument
@Override
protected String doInBackground(String... params) {
String type = params[0];
String login_url = "http://www.thejoint.cf/test.php";
if(type.equals("login")) {
try {
String user_name = params[1];
String password = params[2];
URL url = new URL(login_url);//what does the url object have
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data = URLEncoder.encode("user_name","UTF-8")+"="+URLEncoder.encode(user_name,"UTF-8")+"&"
+URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(password,"UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
String result="";
String line="";
while((line = bufferedReader.readLine())!= null) {
result+=line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(context).create();
alertDialog.setTitle("Login Status");
}
@Override
protected void onPostExecute(String result) {
alertDialog.setMessage(result);
Log.i("info",result);
alertDialog.show();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
【问题讨论】:
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" 并且每次连接时应用程序都会关闭" 是否有任何错误或异常?如果有任何问题,请将它们发布在问题中。