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;
}
}
}
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