package com.example.wifiscanner;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.Manifest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.os.Handler;
import android.telecom.Connection;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import pub.devrel.easypermissions.AfterPermissionGranted;
import pub.devrel.easypermissions.AppSettingsDialog;
import pub.devrel.easypermissions.EasyPermissions;
public class MainActivity extends AppCompatActivity implements EasyPermissions.PermissionCallbacks {
private WifiManager wifiManager;
private ListView listView;
private Button button;
private int size = 0;
private List<ScanResult> results;
private ArrayList<String> arrayList = new ArrayList<>();
private ArrayAdapter arrayAdapter;
private String ssid = "SLT-FIBRE";
private String password = "VMEKF27*";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
scanWifi();
}
});
listView = findViewById(R.id.listview);
wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
if (!wifiManager.isWifiEnabled()) {
Toast.makeText(this, "Wifi is disabled", Toast.LENGTH_SHORT).show();
wifiManager.setWifiEnabled(true);
}
arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, arrayList);
listView.setAdapter(arrayAdapter);
ConnectToNetworkWPA(ssid,password);
scanWifi();
}
public void startScan() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
scanWifi();
}
}, 5 * 1000);
}
@AfterPermissionGranted(123)
public void scanWifi() {
String[] perm = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.CHANGE_WIFI_STATE};
if (EasyPermissions.hasPermissions(this, perm)) {
arrayList.clear();
registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
boolean scanStarted = wifiManager.startScan();
if (scanStarted) {
Toast.makeText(this, "Scanning true", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Scanning false", Toast.LENGTH_SHORT).show();
}
Toast.makeText(this, "PERMISSIONS HAVE BEEN GRANTED", Toast.LENGTH_SHORT).show();
} else {
EasyPermissions.requestPermissions(this, "WE REQUIRE THESE PERMISSIONS FOR THE APP TO FUNCTION", 123, perm);
}
}
BroadcastReceiver wifiReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
results = wifiManager.getScanResults();
unregisterReceiver(this);
for (ScanResult scanResult : results) {
arrayList.add(" " + scanResult.SSID + " " + scanResult.frequency + " " + scanResult.level + " " + scanResult.BSSID);
arrayAdapter.notifyDataSetChanged();
}
}
};
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}
@Override
public void onPermissionsGranted(int requestCode, @NonNull List<String> perms) {
scanWifi();
}
@Override
public void onPermissionsDenied(int requestCode, @NonNull List<String> perms) {
if (EasyPermissions.somePermissionPermanentlyDenied(this, perms)) {
new AppSettingsDialog.Builder(this).build().show();
}
}
public void ConnectToNetworkWPA(String SSID, String password) {
try {
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + SSID + "\""; // Please note the quotes. String should contain SSID in quotes
conf.preSharedKey = "\"" + password + "\"";
conf.status = WifiConfiguration.Status.ENABLED;
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
int networkId = wifiManager.addNetwork(conf);
Log.d("connecting", conf.SSID + " " + conf.preSharedKey);
Log.d("after connecting", conf.SSID + " " + conf.preSharedKey);
wifiManager.disconnect();
wifiManager.enableNetwork(networkId, true);
wifiManager.reconnect();
Log.d("re connecting", SSID + " " + conf.preSharedKey);
final NetworkRequest requestForWifi =
new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.build();
final ConnectivityManager connectivityManager = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
final ConnectivityManager.NetworkCallback networkCallbackWifi = new ConnectivityManager.NetworkCallback(){
@Override
public void onAvailable(@NonNull Network network) {
}
@Override
public void onLost(@NonNull Network network) {
}
};
connectivityManager.requestNetwork(requestForWifi, networkCallbackWifi);
} catch (Exception ex) {
ex.getMessage();
ex.printStackTrace();
}
}
public void BroadCast() {
if (wifiManager.isWifiEnabled()) {
wifiManager.setWifiEnabled(false);
}
WifiConfiguration netConfig = new WifiConfiguration();
netConfig.SSID = "HM3355";
netConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
try {
Method setWifiApMethod = wifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
boolean apstatus = (Boolean) setWifiApMethod.invoke(wifiManager, netConfig, true);
Method isWifiApEnabledmethod = wifiManager.getClass().getMethod("isWifiApEnabled");
while (!(Boolean) isWifiApEnabledmethod.invoke(wifiManager)) {
}
;
Method getWifiApStateMethod = wifiManager.getClass().getMethod("getWifiApState");
int apstate = (Integer) getWifiApStateMethod.invoke(wifiManager);
Method getWifiApConfigurationMethod = wifiManager.getClass().getMethod("getWifiApConfiguration");
netConfig = (WifiConfiguration) getWifiApConfigurationMethod.invoke(wifiManager);
Log.e("CLIENT", "\nSSID:" + netConfig.SSID + "\nPassword:" + netConfig.preSharedKey + "\n");
} catch (Exception e) {
Log.e(this.getClass().toString(), "", e);
}
}
}
Android アプリをプログラムで esp32 wifi チップに接続しようとしていますが、機能しません。コードは問題なくコンパイルおよび実行されますが、指定されたネットワークに接続しません。エラーは表示されません。デバッグしても、ssid とパスワードがメソッドを正しく通過していることがわかりますが、なぜ esp32 に接続しないのか理解できません。これらの資格情報を使用すると、PC は接続できます。