任何人都可以告诉我如何登录？我尝试使用用户名Priyanka和密码Priyanka登录，但不成功。
任何人都可以帮助我吗？
package org.example.rig_parking;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class Rig_ParkingActivity extends Activity {
String username,password;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Typeface myTypeface = Typeface.createFromAsset(getAssets(), "fonts/semibold.ttf");
TextView myTextView = (TextView)findViewById(R.id.rig_parkmain);
myTextView.setTypeface(myTypeface);
TextView forget_main = (TextView)findViewById(R.id.forget_main);
forget_main.setTypeface(myTypeface);
final EditText email_main = (EditText)findViewById(R.id.email_main);
email_main.setTypeface(myTypeface);
final EditText password_main = (EditText)findViewById(R.id.password_main);
password_main.setTypeface(myTypeface);
Button copy=(Button) findViewById(R.id.copyright);
copy.setText("(c)Rig Parking 2010-2012,All Rights Reserved");
copy.setTypeface(myTypeface);
TextView register=(TextView) findViewById(R.id.register_main);
register.setTypeface(myTypeface);
register.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent register=new Intent(getApplicationContext(),Register.class);
startActivity(register);
}
});
/* forget_main.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent register=new Intent(getApplicationContext(),Tab.class);
startActivity(register);
}
});
*/
TextView login=(TextView) findViewById(R.id.login_main);
login.setTypeface(myTypeface);
login.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
username=email_main.getText().toString();
password=password_main.getText().toString();
if(username.equals("")&&password.equals(""))
{
final AlertDialog alertDialog51;
alertDialog51 = new AlertDialog.Builder(Rig_ParkingActivity.this).create();
alertDialog51.setMessage(Html
.fromHtml("<font color='#00beb4'><b> Enter Email and Password</b></font>"));
alertDialog51.setButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.setButton2("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.show();
}
else if(username.equals(""))
{
final AlertDialog alertDialog51;
alertDialog51 = new AlertDialog.Builder(Rig_ParkingActivity.this).create();
alertDialog51.setMessage(Html
.fromHtml("<font color='#00beb4'><b> Enter Email </b></font>"));
alertDialog51.setButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.setButton2("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.show();
}
else if(password.equals(""))
{
final AlertDialog alertDialog51;
alertDialog51 = new AlertDialog.Builder(Rig_ParkingActivity.this).create();
alertDialog51.setMessage(Html
.fromHtml("<font color='#00beb4'><b> Enter Password </b></font>"));
alertDialog51.setButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.setButton2("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.show();
}
else{
LoginTask logintsk=new LoginTask();
logintsk.execute();
}
}
});
}
private class LoginTask extends AsyncTask<Void, Void, Void> {
private final ProgressDialog dialog = new ProgressDialog(Rig_ParkingActivity.this);
@Override
protected void onPreExecute() {
this.dialog.setMessage("Loading ...");
this.dialog.show();
}
@Override
protected Void doInBackground(final Void... unused) {
Log.i("Priyanka", "username"+username);
Log.i("Priyanka", "password"+password);
String auth=BusinessLogic_login.candidatelogin(username, password);
String userid=auth;
Log.i("priyanka", "auth"+auth);
if(auth.equals("0")||(auth.equals("")))
{
Rig_ParkingActivity.this.runOnUiThread(new Runnable() {
public void run() {
final AlertDialog alertDialog51;
alertDialog51 = new AlertDialog.Builder(Rig_ParkingActivity.this).create();
alertDialog51.setMessage(Html
.fromHtml("<font color='#00beb4'><b>Enter correct Email or Password</b></font>"));
alertDialog51.setButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.setButton2("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.show();
}
});
}
else {
Intent intnt=new Intent(getBaseContext(), Tab.class);
startActivity(intnt);
}
return null; // don't interact with the ui!
}
@Override
protected void onPostExecute(Void result)
{
if (this.dialog.isShowing())
{
this.dialog.dismiss();
}
}
}
}
答案 0 :(得分：1)
private class LoginTask extends AsyncTask<Void, Void, Void> {
private final ProgressDialog dialog = new ProgressDialog(Rig_ParkingActivity.this);
@Override
protected void onPreExecute() {
this.dialog.setMessage("Loading ...");
this.dialog.show();
}
@Override
protected Void doInBackground(final Void... unused) {
Log.i("Priyanka", "username"+username);
Log.i("Priyanka", "password"+password);
String auth=BusinessLogic_login.candidatelogin(username, password);
String userid=auth;
Log.i("priyanka", "auth"+auth);
if(auth.equals("0")||(auth.equals("")))
{
flag=true;
Rig_ParkingActivity.this.runOnUiThread(new Runnable() {
public void run() {
final AlertDialog alertDialog51;
alertDialog51 = new AlertDialog.Builder(Rig_ParkingActivity.this).create();
alertDialog51.setMessage(Html
.fromHtml("<font color='#00beb4'><b>Enter correct Email or Password</b></font>"));
alertDialog51.setButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.setButton2("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
alertDialog51.dismiss();
}
});
alertDialog51.show();
}
});
}
return null; // don't interact with the ui!
}
@Override
protected void onPostExecute(Void result)
{
if(!flag)
{
Intent intnt=new Intent(getBaseContext(), Tab.class);
startActivity(intnt);
}
if (this.dialog.isShowing())
{
this.dialog.dismiss();
}
}
}
尝试此代码...拥有一个名为 flag 的boolean值，并将其设置为false。我刚刚使用过它..你必须初始化它。
onPostExecute()将在UI线程中运行..如果您在doInBackground()方法中调用intent，它在UIThread中没有更改，您无法看到更改是我从您的知识中获知的代码..检查这个