这是我收到的错误；
05-16 04:42:07.579: E/dalvikvm(548): Could not find class 'com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext$MyConstraintViolation', referenced from method com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext$StandardPayloadDialect.processPayload
05-16 04:42:08.209: E/dalvikvm(548): Could not find class 'javax.validation.ConstraintViolation', referenced from method com.google.web.bindery.requestfactory.shared.Receiver.onConstraintViolation
所以这里是主类的代码。它在我只是为了试验而制作 的Hello Toast消息之后停止工作。
package com.ncwitmobileapp;
import com.ncwitmobileapp.R;
import com.ncwitmobileapp.client.MyRequestFactory;
import com.ncwitmobileapp.client.MyRequestFactory.HelloWorldRequest;
import com.ncwitmobileapp.client.MyRequestFactory.NCWITMOBILEAPPRequest;
import com.google.gwt.core.client.GWT;
import com.google.web.bindery.requestfactory.shared.Receiver;
import com.google.web.bindery.requestfactory.shared.ServerFailure;
import android.R.color;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Login_Screen extends Activity
{
private static final String TAG = "Techchicks";
/**
* The current context.
*/
private Context mContext = this;
@Override
public void onCreate(Bundle savedInstanceState)
{
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.logins);
final Button login = (Button)findViewById(R.id.login);
login.setOnClickListener(new View.OnClickListener() {
public void onClick(View lb) {
//communicate with App Engine
//goes to the Menu Page
//gets username and password from user(Editables)
EditText un=(EditText)findViewById(R.id.username);
EditText ps=(EditText)findViewById(R.id.password);
final String username = un.getText().toString();
final String password = ps.getText().toString();
final Context context = getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
login.setEnabled(false);
Log.i(TAG, "preparing request to send to server");
login.setEnabled(false);
Log.i(TAG, "preparing request to send to server");
// Use an AsyncTask to avoid blocking the UI thread
new AsyncTask<Void, Void, String>() {
private String message;
@Override
protected String doInBackground(Void... arg0) {
MyRequestFactory requestFactory = Util.getRequestFactory(mContext, MyRequestFactory.class);
final NCWITMOBILEAPPRequest request = requestFactory.nCWITMOBILEAPPRequest();
Log.i(TAG, "Sending request to server");
request.getAuthenticatedTechicksmember(username, password).fire(new Receiver<String>() {
@Override
public void onFailure(ServerFailure error) {
message = "Failure: " + error.getMessage();
}
@Override
public void onSuccess(String result) {
message = result;
Log.i(TAG,"got back a hello world message");
}
});
CharSequence tet = message;
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, tet, duration);
toast.show();
return message;
}
}.execute();
}
});
Button register = (Button)findViewById(R.id.register);
register.setOnClickListener(new View.OnClickListener() {
public void onClick(View lb) {
//goes to the Registration Page
}
});
Button forgotpassword = (Button)findViewById(R.id.forgotpassword);
forgotpassword.setOnClickListener(new View.OnClickListener() {
public void onClick(View lb) {
//goes to the Forgot Password Page
}
});
}
}
这是来自服务类的代码：
package com.ncwitmobileapp.server;
import java.util.List;
import java.util.logging.Logger;
import com.ncwitmobileapp.annotation.ServiceMethod;
public class NCWITMOBILEAPPService {
private static final Logger log = Logger.getLogger(NCWITMOBILEAPPService.class.getName());
public NCWITMOBILEAPPService() {
}
@ServiceMethod
public Techicksmember createTechicksmember() {
// TODO Auto-generated method stub
return null;
}
@ServiceMethod
public static String getAuthenticatedTechicksmember(String userName, String password) {
log.info("Called authenticateTechicksmember");
log.info("userName = " + userName + " password = " + password);
// return ("Success");
Datastore db = new Datastore();
Techicksmember member = db.find(userName);
if (member==null){
return "Member not existant";
}
if (member.getPassword()==password){
return "Identity validated!";
}
return "Identity Invalidated";
}
@ServiceMethod
public Techicksmember readTechicksmember(Long id) {
// TODO Auto-generated method stub
return null;
}
@ServiceMethod
public Techicksmember updateTechicksmember(Techicksmember techicksmember) {
// TODO Auto-generated method stub
return null;
}
@ServiceMethod
public void deleteTechicksmember(Techicksmember techicksmember) {
// TODO Auto-generated method stub
}
@ServiceMethod
public List<Techicksmember> queryTechicksmembers() {
// TODO Auto-generated method stub
return null;
}
}