嗨iam郁闷地说,我试图将应用程序连接到mysql的登录代码与wampserver一起工作正常。 但是在上线的时候,Hostliner iam在postexecute函数上遇到了致命的异常。
请帮助我无法在我的应用中转发。
我粘贴我的日志和后台任务java代码。
import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
/**
* Created by prabeesh on 7/14/2015.
*/
public class BackgroundTask extends AsyncTask<String,Void,String> {
AlertDialog alertDialog;
Context ctx;
BackgroundTask(Context ctx)
{
this.ctx =ctx;
}
@Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(ctx).create();
alertDialog.setTitle("Login Information....");
}
@Override
protected String doInBackground(String... params) {
String reg_url = "http://kamster.esy.es/register.php";
String login_url = "http://kamster.esy.es/login.php";
String method = params[0];
if (method.equals("register")) {
String name = params[1];
String user_name = params[2];
String user_pass = params[3];
try {
URL url = new URL(reg_url);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
//httpURLConnection.setDoInput(true);
OutputStream OS = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8"));
String data = URLEncoder.encode("user", "UTF-8") + "=" + URLEncoder.encode(name, "UTF-8") + "&" +
URLEncoder.encode("user_name", "UTF-8") + "=" + URLEncoder.encode(user_name, "UTF-8") + "&" +
URLEncoder.encode("user_pass", "UTF-8") + "=" + URLEncoder.encode(user_pass, "UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
OS.close();
InputStream IS = httpURLConnection.getInputStream();
IS.close();
//httpURLConnection.connect();
httpURLConnection.disconnect();
return "Registration Success...";
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
else if(method.equals("login"))
{
String login_name = params[1];
String login_pass = params[2];
try {
URL url = new URL(login_url);
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 data = URLEncoder.encode("login_name","UTF-8")+"="+URLEncoder.encode(login_name,"UTF-8")+"&"+
URLEncoder.encode("login_pass","UTF-8")+"="+URLEncoder.encode(login_pass,"UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
String response = "";
String line = "";
while ((line = bufferedReader.readLine())!=null)
{
response+= line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return response;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String result) {
if(result.equals("Registration Success..."))
{
Toast.makeText(ctx, result, Toast.LENGTH_LONG).show();
}
else
{
alertDialog.setMessage(result);
alertDialog.show();
}
}
}
&#13;
记录
10-29 12:29:22.941 12011-12028/com.easyway2in.mysqldbdemo W/System.err﹕ java.io.EOFException
10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:95) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:179) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:101) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:628) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:388) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:332) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:199) 10-29 12:29:22.942 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.easyway2in.mysqldbdemo.BackgroundTask.doInBackground(BackgroundTask.java:92) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at com.easyway2in.mysqldbdemo.BackgroundTask.doInBackground(BackgroundTask.java:23) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at android.os.AsyncTask $ 2.call(AsyncTask.java:292) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at java.util.concurrent.FutureTask.run(FutureTask.java:237) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at android.os.AsyncTask $ SerialExecutor $ 1.run(AsyncTask.java:231) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:587) 10-29 12:29:22.943 12011-12028 / com.easyway2in.mysqldbdemo W / System.err:at java.lang.Thread.run(Thread.java:818) 10-29 12:29:22.945 12011-12011 / com.easyway2in.mysqldbdemo D / AndroidRuntime:关闭VM ---------崩溃的开始 10-29 12:29:22.945 12011-12011 / com.easyway2in.mysqldbdemo E / AndroidRuntime:FATAL EXCEPTION:main 过程:com.easyway2in.mysqldbdemo,PID:12011 java.lang.NullPointerException:尝试调用虚方法&#39; boolean java.lang.String.equals(java.lang.Object)&#39;在null对象引用上 在com.easyway2in.mysqldbdemo.BackgroundTask.onPostExecute(BackgroundTask.java:124) 在com.easyway2in.mysqldbdemo.BackgroundTask.onPostExecute(BackgroundTask.java:23) 在android.os.AsyncTask.finish(AsyncTask.java:636) 在android.os.AsyncTask.access $ 500(AsyncTask.java:177) 在android.os.AsyncTask $ InternalHandler.handleMessage(AsyncTask.java:653) 在android.os.Handler.dispatchMessage(Handler.java:102) 在android.os.Looper.loop(Looper.java:135) 在android.app.ActivityThread.main(ActivityThread.java:5257) at java.lang.reflect.Method.invoke(Native Method) 在java.lang.reflect.Method.invoke(Method.java:372) 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:903) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) ---------系统的开头
感谢