안드로이드 WIfiManager 로 주변 wifi 스캔하기! Android WifiManager scan access point wifi list

출처: https://altongmon.tistory.com/694 [IOS를 Java]

이번 포스팅에서는 WifiManager 클래스를 사용해서 주변 ap(Access Point) wifi목록을

스캔하는 예제입니다.

실행 결과 먼저 보여드립니다.

아래 정보들 말고도 더 확인할 수 있는데, 저는 이렇게만 만들었습니다.

먼저

Manifest.xml에 아래 퍼미션들을 추가해줍니다.

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
<uses-feature android:name="android.hardware.wifi"/>

그리고 저는 데이터 바인딩을 사용하기 때문에

build.gradle(Module:app) 을 열어

android{} 중괄호 블록 내부에

dataBinding {
enabled true
}

데이터 바인딩을 허용하는 코드를 넣어줍니다.

그리고 레이아웃에서 저는 CardView 와 RecyclerView를 둘 다 사용했는데요.

그래서

dependencies {

}

블록에 아래 3가지를 implementation해줍니다.

implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'
implementation 'com.android.support:recyclerview-v7:27.1.1'

데이터를 담을 AccessPoint 클래스와 RecyclerView에 데이터를 넣어주고 처리하기 위한

RecyclerViewAdapter 클래스를 상속 받는 AccessPointAdapter 도 만드러 줍니다.

AccessPoint.java

public class AccessPoint {

private String ssid;

private String bssid;

private String rssi;

public AccessPoint(String ssid, String bssid, String rssi) {

this.ssid = ssid;

this.bssid = bssid;

this.rssi = rssi;

}

public String getSsid() {

return ssid;

}

public String getBssid() {

return bssid;

}

public String getRssi() {

return rssi;

}

Colored by Color Scripter

AccessPointAdapter.java

public class AccessPointAdapter extends RecyclerView.Adapter {

private Vector<AccessPoint> accessPoints;

private Context context;

AccessPointAdapter(Vector<AccessPoint> accessPoints, Context context) {

this.accessPoints = accessPoints;

this.context = context;

}

@NonNull

@Override

public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

RecyclerView.ViewHolder holder;

ItemAccesspointBinding binding = ItemAccesspointBinding.inflate(LayoutInflater.from(context), parent, false);

holder = new AccessPointHolder(binding);

return holder;

}

@Override

public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {

AccessPointHolder accessPointHolder = (AccessPointHolder)holder;

final ItemAccesspointBinding binding = accessPointHolder.binding;

binding.cardView.setRadius(20.0f);

String ssid = "SSID : " + accessPoints.get(position).getSsid();

String bSsid = "BSSID : " + accessPoints.get(position).getBssid();

String rssi = "RSSI : " + accessPoints.get(position).getRssi();

binding.ssidTextView.setText(ssid);

binding.bssidTextView.setText(bSsid);

binding.rssiLevelTextView.setText(rssi);

}

@Override

public int getItemCount() {

return accessPoints.size();

}

private class AccessPointHolder extends RecyclerView.ViewHolder {

ItemAccesspointBinding binding;

AccessPointHolder(ItemAccesspointBinding binding) {

super(binding.getRoot());

this.binding = binding;

}

Colored by Color Scripter

---------------------------------------------------------------------------------------------------------

이제 xml 차례입니다.

recyclerView의 아이템으로 들어갈 layout

item_accesspoint.xml

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

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

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

<android.support.v7.widget.CardView

android:layout_margin="10dp"

android:id="@+id/cardView"

android:layout_width="match_parent"

android:layout_height="wrap_content">

<android.support.constraint.ConstraintLayout

android:padding="10dp"

android:background="@color/colorAccent"

android:id="@+id/cardLayout"

android:layout_width="match_parent"

android:layout_height="wrap_content">

<TextView

app:layout_constraintTop_toTopOf="@+id/cardLayout"

app:layout_constraintStart_toStartOf="@+id/cardLayout"

app:layout_constraintBottom_toTopOf="@+id/bssidTextView"

android:id="@+id/ssidTextView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="@dimen/textSize"/>

<TextView

app:layout_constraintStart_toStartOf="@+id/ssidTextView"

app:layout_constraintTop_toBottomOf="@+id/ssidTextView"

app:layout_constraintBottom_toTopOf="@+id/rssiLevelTextView"

android:id="@+id/bssidTextView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="@dimen/textSize" />

<TextView

app:layout_constraintStart_toStartOf="@+id/ssidTextView"

app:layout_constraintTop_toBottomOf="@+id/bssidTextView"

app:layout_constraintBottom_toBottomOf="@+id/cardLayout"

android:id="@+id/rssiLevelTextView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="@dimen/textSize" />

</android.support.constraint.ConstraintLayout>

</android.support.v7.widget.CardView>

</layout>

Colored by Color Scripter

여기서 사용된 @dimen/textSize 는 20sp 입니다.

activity_main.xml

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

<layout 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.support.constraint.ConstraintLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="wifi.rowan.com.wifilistscanner.MainActivity">

<android.support.v7.widget.Toolbar

android:background="@color/colorPrimary"

android:id="@+id/toolbar"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintBottom_toTopOf="@+id/accessPointRecyclerView"

android:layout_width="match_parent"

android:layout_height="wrap_content">

<TextView

android:textColor="#FFFFFFFF"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:text="Wifi List"/>

</android.support.v7.widget.Toolbar>

<android.support.v7.widget.RecyclerView

app:layout_constraintTop_toBottomOf="@+id/toolbar"

app:layout_constraintBottom_toBottomOf="parent"

android:id="@+id/accessPointRecyclerView"

android:layout_width="match_parent"

android:layout_height="0dp"/>

</android.support.constraint.ConstraintLayout>

</layout>

Colored by Color Scripter

마지막으로

MainActivity.java

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

public class MainActivity extends AppCompatActivity {

Vector<AccessPoint> accessPoints;

LinearLayoutManager linearLayoutManager;

AccessPointAdapter accessPointAdapter;

WifiManager wifiManager;

List<ScanResult> scanResult;

ActivityMainBinding binding;

/* Location permission 을 위한 필드 */

public static final int MULTIPLE_PERMISSIONS = 10; // code you want.

// 원하는 권한을 배열로 넣어줍니다.

String[] permissions = new String[]{

Manifest.permission.ACCESS_COARSE_LOCATION

};

/* Location permission 을 위한 필드 */

@Override

protected void onStart() {

super.onStart();

if (Build.VERSION.SDK_INT >= 23) {

if (!checkPermissions()) {

finish();

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);

linearLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);

binding.accessPointRecyclerView.setLayoutManager(linearLayoutManager);

accessPoints = new Vector<>();

if (wifiManager != null) {

if (!wifiManager.isWifiEnabled()) {

wifiManager.setWifiEnabled(true);

}

final IntentFilter filter = new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);

filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);

registerReceiver(mWifiScanReceiver, filter);

wifiManager.startScan();

}

private BroadcastReceiver mWifiScanReceiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

final String action = intent.getAction();

if (action != null) {

if (action.equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {

getWIFIScanResult();

wifiManager.startScan();

} else if (action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {

context.sendBroadcast(new Intent("wifi.ON_NETWORK_STATE_CHANGED"));

}

};

public void getWIFIScanResult() {

scanResult = wifiManager.getScanResults();

if (accessPoints.size() != 0) {

accessPoints.clear();

}

for (int i = 0; i < scanResult.size(); i++) {

ScanResult result = scanResult.get(i);

if (result.frequency < 3000) {

Log.d(". SSID : " + result.SSID,

result.level + ", " + result.BSSID);

accessPoints.add(new AccessPoint(result.SSID, result.BSSID, String.valueOf(result.level)));

}

accessPointAdapter = new AccessPointAdapter(accessPoints, MainActivity.this);

binding.accessPointRecyclerView.setAdapter(accessPointAdapter);

accessPointAdapter.notifyDataSetChanged();

}

@Override

protected void onDestroy() {

super.onDestroy();

unregisterReceiver(mWifiScanReceiver);

}

/* Location permission 을 위한 메서드들 */

private boolean checkPermissions() {

int result;

List<String> listPermissionsNeeded = new ArrayList<>();

for (String p : permissions) {

result = ContextCompat.checkSelfPermission(MainActivity.this, p);

if (result != PackageManager.PERMISSION_GRANTED) {

listPermissionsNeeded.add(p);

}

if (!listPermissionsNeeded.isEmpty()) {

ActivityCompat.requestPermissions(MainActivity.this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), MULTIPLE_PERMISSIONS);

return false;

}

return true;

}

@Override

public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {

switch (requestCode) {

case MULTIPLE_PERMISSIONS: {

if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

Log.d("permission", "granted");

}

/* Location permission 을 위한 메서드들 */

}

Colored by Color Scripter

코드를 보고 순서대로 따라하시면 큰 어려움 없이 하실 수 있을 거에요^^

이상입니다.

감사합니다.

출처: https://altongmon.tistory.com/694 [IOS를 Java]

'IT기술 관련 > 모바일' 카테고리의 다른 글

[Volley][Java]volley로 json데이터받기(3) (0)	2019.06.26
[안드로이드] extends Fragment 구현시 context 구하는 방법 (0)	2019.06.26
android kotlin - WebView example -안드로이드 코틀린 웹뷰 (0)	2019.06.14
안드로이드 스튜디오 - GitHub 연동과 add, commit, push 개념 (0)	2019.06.11
[Marshmallow] 권한 요청 방법 (0)	2019.06.08

'IT기술 관련 > 모바일' 카테고리의 다른 글

티스토리툴바