login activity in xml file and java file for android

log in activity 

XML FILE ;

<?xml version="1.0" encoding="utf-8"?>

<android.widget.RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:gravity="center"

    tools:context="com.example.store.n01.login_Activity">

    <EditText

        android:id="@+id/edt_email"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:background="@drawable/text_box"

        android:hint="@string/email_or_username"

        android:inputType="textEmailAddress"

        android:padding="10dp"

        android:gravity="center"

        />

    <EditText

        android:id="@+id/edt_passward"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/edt_email"

        android:layout_alignStart="@+id/edt_email"

        android:layout_below="@+id/edt_email"

        android:layout_marginTop="25dp"

        android:background="@drawable/text_box"

        android:hint="@string/passward"

        android:inputType="textPassword"

        android:textAlignment="center"

        android:padding="10dp"/>

    <Button

        android:id="@+id/btn_login"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/edt_passward"

        android:layout_alignStart="@+id/edt_passward"

        android:layout_below="@+id/edt_passward"

        android:layout_marginTop="43dp"

        android:background="@drawable/btn_all"

        android:textSize="18sp"

        android:text="@string/bt_login"

        android:gravity="center"

        android:padding="10dp"/>

    <TextView

        android:id="@+id/textView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignEnd="@+id/btn_login"

        android:layout_alignRight="@+id/btn_login"

        android:layout_below="@+id/btn_login"

        android:layout_marginEnd="21dp"

        android:layout_marginRight="21dp"

        android:layout_marginTop="16dp"

        android:text="@string/forget_passward" />
</android.widget.RelativeLayout>

PREVIEW OF XML FILE

java FILE :-


(in that file include all error massage for email
check out , password length ,intent press login button to sign_up activiety
toast make ,also)


package com.example.store.n01;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class login_Activity extends AppCompatActivity {

    EditText edt_email,edt_passward;
    Button btn_login;


    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login_);

        edt_email = (EditText)findViewById(R.id.edt_email);
        edt_passward= (EditText)findViewById(R.id.edt_passward);
        btn_login=(Button)findViewById(R.id.btn_login);

        btn_login.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View view) {

                if(checkEmail(edt_email,"Enter Valid Email") && checkpassward(edt_passward,"Enter 6 cherecter passward")) {

                    Intent i = new Intent(getApplicationContext(),Sign_up.class);
                    startActivity(i);


                   // String s1 = edt_email.getText().toString();                    //String s2 = edt_passward.getText().toString();
                    //oast.makeText(login_Activity.this, s1, Toast.LENGTH_SHORT).show();
                   // Toast.makeText(login_Activity.this, s2, Toast.LENGTH_SHORT).show();                }

               
            }
        });

    }

    public boolean checkEmail(EditText edt,String msg)
    {

        if(edt.getText().toString() != null && edt.getText().toString() != ""                && edt.getText().toString().length() > 0 && Patterns.EMAIL_ADDRESS.matcher(edt.getText().toString()).matches())
        {
            return true;
        }
        else{
            edt.setError(msg);
            return false;
        }
    }
    public boolean checkpassward(EditText edt,String msg)
    {

        if(edt.getText().toString() != null && edt.getText().toString() != ""                && edt.getText().toString().length() >= 6 )
        {
            return true;
        }
        else{
            edt.setError(msg);
            return false;
        }
    }
}