如何解决android中的登录问题
| 我有一个登录页面，当我输入正确的用户名和密码时，它可以正常工作，但是对于登录失败，它无法正常工作。 在android中，我不知道是否有人可以提供代码 这是我的代码：package com.android;
import java.io.IOException;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import org.json.JSONException;
import org.json.JSONObject;
import org.ksoap2.soapEnvelope;
import org.ksoap2.soapFault;
import org.ksoap2.serialization.soapObject;
import org.ksoap2.serialization.soapPrimitive;
import org.ksoap2.serialization.soapSerializationEnvelope;
import org.ksoap2.transport.AndroidHttpTransport;
import org.xmlpull.v1.XmlPullParserException;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.*;
public class Login extends Activity {
private static final String NAMESPACE = \"http://tempuri.org/\";
private static final String URL =\"http:.asmx?op=LoginRequest\";
private static final String SOAP_ACTION = \"http://tempuri.org/Login\";
//private String login=\"\";
private static final String METHOD_NAME = \"Login\";
ImageButton login_button,sign_button;
TextView m,p,f,email,password,forgot_password;
EditText emailid,epassword;
AlertDialog authProgressDialog;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestwindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.login);
email=(TextView)findViewById(R.id.email);
password=(TextView)findViewById(R.id.password);
forgot_password=(TextView)findViewById(R.id.forgot);
Context context = email.getContext();
Typeface font=Typeface.createFromAsset(context.getAssets(),\"arial.ttf\");
email.setTypeface(font);
Context con = password.getContext();
Typeface face=Typeface.createFromAsset(con.getAssets(),\"arial.ttf\");
password.setTypeface(face);
Context con1 = forgot_password.getContext();
Typeface face1=Typeface.createFromAsset(con1.getAssets(),\"arial.ttf\");
forgot_password.setTypeface(face1);
// new theTask().execute();
login_button=(ImageButton)findViewById(R.id.login);
sign_button=(ImageButton)findViewById(R.id.signup);
login_button.setonClickListener(new OnClickListener(){
public void onClick(View v) {
String username,password;
emailid =(EditText)findViewById(R.id.edemail);
epassword =(EditText)findViewById(R.id.edpassword);
username = emailid.getText().toString();
password = epassword.getText().toString();
showDialog(0);
// Todo Auto-generated method stub
SoapObject request=new SoapObject(NAMESPACE,METHOD_NAME);
String qry=\"{\\\"General\\\":\"+\"{\\\"type\\\": \\\"Request\\\",\"+\"\\\"application\\\": \\\"Mmmmm\\\",\"+\"\\\"appver\\\": \\\"1.0.0\\\",\"+\"\\\"phonedeviceid\\\": \\\"123456789\\\",\"+\"\\\"deviceType\\\": \\\"Android\\\",\"+\"\\\"deviceOsversion\\\": \\\"3.0\\\"},\"+\"\\\"Login\\\":\"+\"{\\\"emailID\\\":\"+\"\\\"\"+username+\"\\\",\"+\"\\\"password\\\":\"+\"\\\"\"+password+\"\\\"\"+\"}\"+\"}\";
Log.i(\"Input\",qry);
request.addProperty(\"JSONRequestString\",qry);
SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet=true;
envelope.bodyOut=request;
envelope.encodingStyle=SoapSerializationEnvelope.ENC2001;
envelope.setoutputSoapObject(request);
AndroidHttpTransport androidHttpTransPort= new AndroidHttpTransport(URL);
try
{
try {
androidHttpTransPort.call(SOAP_ACTION,envelope);
} catch (IOException e) {
// Todo Auto-generated catch block
e.printstacktrace();
}
SoapPrimitive rest=(SoapPrimitive)envelope.getResponse();
Log.i(\"output\",\"Result\"+rest );
// SoapObject var = (SoapObject)rest.getProperty(0);
String conv=rest.toString();
JSONObject js=new JSONObject(conv);
String login = js.getString(\"Login\");
JSONObject err=new JSONObject(login);
String messcode=js.getString(\"HomePageFooterNewUpdates\");
JSONObject code=new JSONObject(messcode);
int GetMessageCode=code.getInt(\"noOfMail\");
Log.i(\"message code \",\"is \" +GetMessageCode);
// String errc=err.getString(\"errorMsg\");
// Log.i(\"err\",errc);
int ResponseForLogin=err.getInt(\"errorCode\");
Log.i(\"Response \",\"is \"+ResponseForLogin);
if(ResponseForLogin==000){
Toast.makeText(Login.this,\"Login Successfull\",Toast.LENGTH_LONG).show();
// prepare the dialog Box
/* ProgressDialog dialog = new ProgressDialog(this);
// make the progress bar Cancelable
dialog.setCancelable(true);
// set a message text
dialog.setMessage(\"Loading...\");
// show it
dialog.show();*/
Intent i=new Intent(Login.this,Home.class);
i.putExtra(\"messcode\",GetMessageCode);
startActivity(i);
} else {
Toast.makeText(Login.this,\"Invalid Emailid or Password...Please Try Again\",Toast.LENGTH_LONG).show();
}
}catch (XmlPullParserException e) {
e.printstacktrace();
}
catch (JSONException e) {
// Todo Auto-generated catch block
e.printstacktrace();
} catch (SoapFault e) {
// Todo Auto-generated catch block
e.printstacktrace();
}
}
} );
sign_button.setonClickListener(new OnClickListener(){
public void onClick(View v) {
Intent i=new Intent(Login.this,Signup.class);
startActivity(i);
}
});
}
}
解决方法
仅给您一些提示，请尝试从中获取帮助。
ImageButton login=(ImageButton)findViewById(R.id.Login);
EditText editText1=(EditText)findViewById(R.id.emailText);
EditText editText2=(EditText)findViewById(R.id.passwordText);
login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if((editText1.getText()+\" \").trim().equals(\"\") || editText1.getText() == null || (editText2.getText()+\" \").trim().equals(\"\") || editText2.getText() == null ){
//show error message here
}
else{
//perrform your action here
//either start a new activity or do something else
}
}
});
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