?xml version="1.0" encoding="utf-8"?>
LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:padding="20dp">

TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Giriş Yap"
android:textSize="24sp"
android:textStyle="bold"
android:layout_marginBottom="30dp"/>

EditText
android:id="@+id/etUsername"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Kullanıcı Adı"
android:inputType="text"
android:layout_marginBottom="10dp"/>

EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Şifre"
android:inputType="textPassword"
android:layout_marginBottom="20dp"/>

Button
android:id="@+id/btnLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Giriş"/>








package com.example.loginliharita;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

private EditText etUsername, etPassword;
private Button btnLogin;

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

etUsername = findViewById(R.id.etUsername);
etPassword = findViewById(R.id.etPassword);
btnLogin = findViewById(R.id.btnLogin);

btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String username = etUsername.getText().toString();
String password = etPassword.getText().toString();

if (username.equals("admin") && password.equals("1234")) {
Intent intent = new Intent(MainActivity.this, harita.class);
startActivity(intent);
finish();
} else {
Toast.makeText(MainActivity.this, "Hatalı kullanıcı adı veya şifre!", Toast.LENGTH_SHORT).show();
}
}
});
}
}













package com.example.loginliharita;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.preference.PreferenceManager;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import org.osmdroid.config.Configuration;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider;
import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay;

import java.util.ArrayList;

public class harita extends AppCompatActivity {

private MapView map = null;
private MyLocationNewOverlay mLocationOverlay;
private final int REQUEST_PERMISSIONS_REQUEST_CODE = 1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

Configuration.getInstance().setUserAgentValue(getPackageName());
Configuration.getInstance().load(this, PreferenceManager.getDefaultSharedPreferences(this));

setContentView(R.layout.activity_harita);

map = findViewById(R.id.mapview);
map.setMultiTouchControls(true);

map.getController().setZoom(15.0);

requestPermissionsIfNecessary(new String[]{
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.WRITE_EXTERNAL_STORAGE
});

mLocationOverlay = new MyLocationNewOverlay(new GpsMyLocationProvider(this), map);
mLocationOverlay.enableMyLocation();
mLocationOverlay.enableFollowLocation();


GeoPoint startPoint = new GeoPoint(37.8444, 27.8458);
map.getController().setCenter(startPoint);
}

@Override
public void onResume() {
super.onResume();
Configuration.getInstance().load(this, PreferenceManager.getDefaultSharedPreferences(this));
if (map != null) {
map.onResume();
}
}

@Override
public void onPause() {
super.onPause();
Configuration.getInstance().save(this, PreferenceManager.getDefaultSharedPreferences(this));
if (map != null) {
map.onPause();
}
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
ArrayList permissionsToRequest = new ArrayList<>();
for (int i = 0; i < grantResults.length; i++) {
permissionsToRequest.add(permissions[i]);
}
if (permissionsToRequest.size() > 0) {
ActivityCompat.requestPermissions(
this,
permissionsToRequest.toArray(new String[0]),
REQUEST_PERMISSIONS_REQUEST_CODE);
}
}

private void requestPermissionsIfNecessary(String[] permissions) {
ArrayList permissionsToRequest = new ArrayList<>();
for (String permission : permissions) {
if (ContextCompat.checkSelfPermission(this, permission)
!= PackageManager.PERMISSION_GRANTED) {
permissionsToRequest.add(permission);
}
}
if (permissionsToRequest.size() > 0) {
this,
permissionsToRequest.toArray(new String[0]),

REQUEST_PERMISSIONS_REQUEST_CODE);
}
}
}