How to make a simple login button in Android

Posted by Shoaib at 6:13:00 pm Read our previous post

Layout/activity_main:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:ems="10"
        android:id="@+id/edtuser"
        android:layout_alignParentTop="true"
        android:layout_alignLeft="@+id/edtpass"
        android:layout_alignStart="@+id/edtpass" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:id="@+id/edtpass"
        android:layout_marginTop="75dp"
        android:layout_below="@+id/edtuser"
        android:layout_alignLeft="@+id/btnLogin"
        android:layout_alignStart="@+id/btnLogin" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Login"
        android:id="@+id/btnLogin"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="UserName"
        android:id="@+id/textView"
        android:layout_alignBottom="@+id/edtuser"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Pass"
        android:id="@+id/textView2"
        android:layout_alignBottom="@+id/edtpass"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />


</RelativeLayout>

MainActivity.java: 

package com.example.shoaibm.loginsimple2;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity {
    Button button;
    EditText edt1, edt2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edt1 = (EditText)findViewById(R.id.edtuser);
        edt2 = (EditText)findViewById(R.id.edtpass);
        button = (Button)findViewById(R.id.btnLogin);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if(edt1.getText().toString().equals("user") && edt2.getText().toString().equals("pass"))
                {
                    Toast.makeText(getApplicationContext(), "Registered User", Toast.LENGTH_LONG).show();
                }
                else
                {
                    Toast.makeText(getApplicationContext(),"Incorrect Username and Password", Toast.LENGTH_LONG).show();
                }
            }
        });

    }
    
}