[Android] 26. 구글 지도 연동, 현재 위치 표시, 장소 검색, 특정 위치에 마커 추가 / 와이파이, 데이터 연결 확인

https://github.com/upcake/Class_Examples

교육 중에 작성한 예제들은 깃허브에 올려두고 있습니다. 

gif 파일은 클릭해서 보는 것이 정확합니다.

---

 - 구글 지도 연동, 현재 위치 표시, 장소 검색, 특정 위치에 마커 추가 -

▲현재 위치 확인 작동 화면

 

▲장소 검색 작동 화면

 

▲마커 추가 작동 화면

 

▲라이브러리 추가 ①

 

▲라이브러리 추가 ②

 

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "com.example.my38_locationmap"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

        multiDexEnabled true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

    implementation 'com.google.android.gms:play-services:12.0.1'
    implementation 'com.android.support:multidex:1.0.3'
}

▲build.gradle(:app)

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.my38_locationmap">

    <!--필요한 권한 생성-->
    <permission android:name="com.example.my38_locationmap.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <!--권한 부여 설정-->
    <uses-permission android:name="com.example.my38_locationmap.permission.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="READ_GSERVICES"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

    <uses-feature android:glEsVersion="0x00020000"
        android:required="true"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"

        android:name="androidx.multidex.MultiDexApplication">

        <!--라이브러리 사용 설정-->
        <uses-library android:name="com.google.android.maps"/>
        <uses-library android:name="org.apache.http.legacy"
            android:required="false"/>

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="개인 API 키"/>
        <!--value는 API키-->

        <meta-data
            android:name="com.google.android.gms.vision"
            android:value="@integer/google_play_services_version"/>

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

▲AndroidManifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_marginStart="6dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="317dp"
        android:layout_marginRight="317dp"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="6dp"
        android:text="위치 확인"
        android:textSize="14sp"/>

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:layout_marginEnd="95dp"
        android:ems="10"
        android:hint="한글 주소 입력"
        android:inputType="textPersonName"
        android:layout_alignParentRight="true"
        android:layout_marginRight="95dp" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="7dp"
        android:layout_marginEnd="2dp"
        android:text="확인"
        android:layout_alignParentRight="true"
        android:layout_marginRight="2dp" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/button1">

        <fragment
            android:id="@+id/map"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:name="com.google.android.gms.maps.SupportMapFragment"/>

    </FrameLayout>
</RelativeLayout>

▲activity_main.xml

 

package com.example.my38_locationmap;

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

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

import java.util.List;

public class MainActivity extends AppCompatActivity {
    //로그캣 사용 설정
    private static final String TAG = "MainActivity";

    //객체 선언
    SupportMapFragment mapFragment;
    GoogleMap map;
    Button btnLocation, btnKor2Loc;
    EditText editText;

    MarkerOptions myMarker;

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

        //권한 설정
        checkDangerousPermissions();

        //객체 초기화
        editText = findViewById(R.id.editText);
        btnLocation = findViewById(R.id.button1);
        btnKor2Loc = findViewById(R.id.button2);

        //지도 프래그먼트 설정
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        mapFragment.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap googleMap) {
                Log.d(TAG, "onMapReady: ");
                map = googleMap;
                map.setMyLocationEnabled(true);
            }
        });
        MapsInitializer.initialize(this);

        //위치 확인 버튼 기능 추가
        btnLocation.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                requestMyLocation();
            }
        });

        btnKor2Loc.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(editText.getText().toString().length() > 0) {
                    Location location = getLocationFromAddress(getApplicationContext(), editText.getText().toString());

                    showCurrentLocation(location);
                }
            }
        });
    }

    private Location getLocationFromAddress(Context context, String address) {
        Geocoder geocoder = new Geocoder(context);
        List<Address> addresses;
        Location resLocation = new Location("");
        try {
            addresses = geocoder.getFromLocationName(address, 5);
            if((addresses == null) || (addresses.size() == 0)) {
                return null;
            }
            Address addressLoc = addresses.get(0);

            resLocation.setLatitude(addressLoc.getLatitude());
            resLocation.setLongitude(addressLoc.getLongitude());

        } catch (Exception e) {
            e.printStackTrace();
        }
        return resLocation;
    }

    private void requestMyLocation() {
        LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        try {
            long minTime = 1000;    //갱신 시간
            float minDistance = 0;  //갱신에 필요한 최소 거리

            manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, minTime, minDistance, new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    showCurrentLocation(location);
                }

                @Override
                public void onStatusChanged(String s, int i, Bundle bundle) {

                }

                @Override
                public void onProviderEnabled(String s) {

                }

                @Override
                public void onProviderDisabled(String s) {

                }
            });
        } catch (SecurityException e) {
            e.printStackTrace();
        }
    }

    private void showCurrentLocation(Location location) {
        LatLng curPoint = new LatLng(location.getLatitude(), location.getLongitude());
        String msg = "Latitutde : " + curPoint.latitude
                + "\nLongitude : " + curPoint.longitude;
        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();

        //화면 확대, 숫자가 클수록 확대
        map.animateCamera(CameraUpdateFactory.newLatLngZoom(curPoint, 15));

        //마커 찍기
        Location targetLocation = new Location("");
        targetLocation.setLatitude(37.4937);
        targetLocation.setLongitude(127.0643);
        showMyMarker(targetLocation);
    }

    //------------------권한 설정 시작------------------------
    private void checkDangerousPermissions() {
        String[] permissions = {
                android.Manifest.permission.ACCESS_COARSE_LOCATION,
                android.Manifest.permission.ACCESS_FINE_LOCATION,
                Manifest.permission.ACCESS_WIFI_STATE
        };

        int permissionCheck = PackageManager.PERMISSION_GRANTED;
        for (int i = 0; i < permissions.length; i++) {
            permissionCheck = ContextCompat.checkSelfPermission(this, permissions[i]);
            if (permissionCheck == PackageManager.PERMISSION_DENIED) {
                break;
            }
        }

        if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(this, "권한 있음", Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(this, "권한 없음", Toast.LENGTH_LONG).show();

            if (ActivityCompat.shouldShowRequestPermissionRationale(this, permissions[0])) {
                Toast.makeText(this, "권한 설명 필요함.", Toast.LENGTH_LONG).show();
            } else {
                ActivityCompat.requestPermissions(this, permissions, 1);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == 1) {
            for (int i = 0; i < permissions.length; i++) {
                if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(this, permissions[i] + " 권한이 승인됨.", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(this, permissions[i] + " 권한이 승인되지 않음.", Toast.LENGTH_LONG).show();
                }
            }
        }
    }
    //------------------권한 설정 끝------------------------

    private void showMyMarker(Location location) {
        if(myMarker == null) {
            myMarker = new MarkerOptions();
            myMarker.position(new LatLng(location.getLatitude(), location.getLongitude()));
            myMarker.title("◎ 내위치\n");
            myMarker.snippet("여기가 어디지?");
            myMarker.icon(BitmapDescriptorFactory.fromResource(R.drawable.mylocation));
            map.addMarker(myMarker);
        }
    }
}

▲MainActivity.java

 

 

- 와이파이, 데이터 연결 확인 -

▲연결 상태 확인 작동 화면

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.my39_isnetwork">
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

▲AndroidManifest.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="연결 상태 확인"
        android:textSize="24sp" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:text="TextView"
                android:textSize="24sp" />
        </LinearLayout>
    </ScrollView>
</LinearLayout>

▲activity_main.xml

 

package com.example.my39_isnetwork;

import androidx.appcompat.app.AppCompatActivity;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    TextView textView;
    Button button1;
    WifiReceiver wifiReceiver;

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

        textView = findViewById(R.id.textView);
        button1 = findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                checkConnectivity();
            }
        });

        wifiReceiver = new WifiReceiver();
    }

    private void checkConnectivity() {
        ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = manager.getActiveNetworkInfo();
        if (info != null) {
            if(info.getType() == ConnectivityManager.TYPE_WIFI) {
                println("WIFI로 설정됨");
            } else if(info.getType() == ConnectivityManager.TYPE_MOBILE) {
                println("일반 망으로 설정됨");
            }
            println("연결 여부 : " + info.isConnected());
        } else {
            println("데이터 통신 불가");
        }
    }

    private void println(String str) {
        textView.append(str + "\n");
    }

    class WifiReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) {
                int state = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, -1);
                if(state == WifiManager.WIFI_STATE_ENABLED) {
                    println("Wifi enabled");
                } else if (state == WifiManager.WIFI_STATE_DISABLED) {
                    println("Wifi disabled");
                }
            } else if (action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
                NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
                WifiManager manager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
                String ssid = manager.getConnectionInfo().getSSID();

                if (info.getState() == NetworkInfo.State.CONNECTED) {
                    println("Connected : " + ssid);
                } else if(info.getState() == NetworkInfo.State.DISCONNECTED) {
                    println("Disconnected : " + ssid);
                }
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();

        IntentFilter filter = new IntentFilter();
        filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
        filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
        registerReceiver(wifiReceiver, filter);
    }

    @Override
    protected void onPause() {
        super.onPause();
        unregisterReceiver(wifiReceiver);
    }
}

▲MainActivity.java