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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 */
}
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