登录时if语句出现问题，android [英] a problem with if statement when login, android

问题描述

大家好:)

我的代码有问题

当我尝试在没有数据库的情况下登录时，它没有任何作用

这是.Java文件

hi all :)

I have a problem with this code

when I try to login without database, it make no action

here is the .Java File

package com.msagroup.sbhmg;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class LogIn extends Activity {
	
	Button _gotousermain;
	EditText _etmail;
	EditText _etpassword;
	String _email;
	String _pass;
	TextView _tvcomm;

	@Override
	
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        
        
        _gotousermain = (Button) findViewById(R.id.btnlogin);
        _etmail = (EditText) findViewById(R.id.etmail);
        _etpassword = (EditText) findViewById(R.id.etpassword);
        _tvcomm = (TextView) findViewById(R.id.tvcomment);
        
        _gotousermain.setOnClickListener(new View.OnClickListener() {
			
			public void onClick(View v) {
				//startActivity(new Intent(LogIn.this, UserMain.class));
				
					_email = _etmail.getText().toString();
					_pass =  _etpassword.getText().toString();
					if(_email == "[e-mail]" && _pass == "123")
					{
						startActivity(new Intent(LogIn.this, UserMain.class));
					}
					else
					{
						if(_email == "[e-mail]" && _pass == "123")
						{
							startActivity(new Intent(LogIn.this, AdminMain.class));
						}
						else
						{
							_tvcomm.append("@string");
						}
					}
				//} 
				//catch (Exception e) {
				//}
				//finally
				//{
				//	
				//}
		        
				
			}
		});
        
	
	}
}

这是.XML文件:

and here is the .XML file:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >

    <EditText

        android:id="@+id/etmail"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="41dp"

        android:hint="@string/email"

        android:inputType="textEmailAddress" >

        <requestFocus />
    </EditText>

    <EditText

        android:id="@+id/etpassword"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/etmail"

        android:layout_marginTop="16dp"

        android:hint="@string/password"

        android:inputType="textPassword" />

    <Button

        android:id="@+id/btnlogin"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/etpassword"

        android:layout_marginTop="16dp"

        android:text="@string/login" />

    <Button

        android:id="@+id/btnregistration"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/btnlogin"

        android:layout_marginTop="70dp"

        android:text="@string/registration" />

    <Button

        android:id="@+id/btnbacktomain"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignBaseline="@+id/btnregistration"

        android:layout_alignBottom="@+id/btnregistration"

        android:layout_alignParentRight="true"

        android:text="@string/backtomain" />

    <TextView

        android:id="@+id/tvcomment"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_centerVertical="true"

        android:text="@string/invalidlogin"

        android:visibility="invisible"/>

</RelativeLayout>

谢谢大家:)

thank you all :)

推荐答案

用此替换您的If语句

Replace your If statement with this

if(_email.equals("[e-mail]") && _pass.equals("123")

我们仅在int值中使用==，对于字符串，我们使用.equals

在您的代码中尝试一下.

We use == only in int values and for string we use .equals

Try this in your code.

查看此 ^ ]

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