cara membuat login di android studio tampa database

Buat projec baru pada android studio

Pilih empty Activity

Copy codingan berikut ke ActivityMain.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editText_username"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="76dp"
        android:layout_marginLeft="76dp"
        android:layout_marginTop="52dp"
        android:ems="10"
        android:hint="Username"
        android:inputType="textPersonName"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editText_password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="76dp"
        android:layout_marginLeft="76dp"
        android:layout_marginTop="24dp"
        android:ems="10"
        android:hint="Password"
        android:inputType="textPassword"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editText_username" />

    <Button
        android:id="@+id/button_login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:text="Login"
        app:layout_constraintEnd_toEndOf="@+id/editText_password"
        app:layout_constraintTop_toBottomOf="@+id/editText_password" />

</android.support.constraint.ConstraintLayout>

Maka hasilnya seperti gambar berikut

Copy codingan berikut ke ActivityMain.java

import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
EditText username,password;
Button login;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login_162038_activity);

username = (EditText) findViewById(R.id.editText_username);
password =  (EditText) findViewById(R.id.editText_password);
login = (Button) findViewById(R.id.button_login);
login.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v){
        String userkey = username.getText().toString();
        String passkey = password.getText().toString();
        if(userkey.equals("login123") && passkey.equals("login123"))/*login123 adalah username dan passwordnya*/{
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setMessage("BERHASIL LOGN!")
                    .setNegativeButton("OK", null).create().show();
        }else{
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setMessage("GAGAL LOGIN!")
                    .setNegativeButton("Retry", null).create().show();
        }

    }

});

    }
}

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cara membuat login di android studio tampa database

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