扫描的 wifi 结果未显示

Question

我使用了以下 link Application to Display All Available WiFi Network and Connect with Specific Network. 创建应用程序。但是它在 android 6.0 中没有显示任何结果，在 android 5.0 中显示扫描的 wifi 网络请帮助我为这个解决方案。我不擅长网络相关的概念。

以下是扫描wifi列表并以列表视图格式activity显示的代码

public class ScanWifList extends ListActivity {
WifiManager mainWifiObj;
WifiScanReceiver wifiReciever;
ListView list;
String wifis[];
private int ASK_MULTIPLE_PERMISSION_REQUEST_CODE = 1;
EditText pass;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan_wifi);
    if (android.os.Build.VERSION.SDK_INT >= 23) {
        requestPermissions(new String[]{
                        Manifest.permission.INTERNET,
                        Manifest.permission.READ_EXTERNAL_STORAGE,
                        Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        Manifest.permission.ACCESS_NETWORK_STATE},
                ASK_MULTIPLE_PERMISSION_REQUEST_CODE);
    }
    list=getListView();
    mainWifiObj = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
    wifiReciever = new WifiScanReceiver();
    mainWifiObj.startScan();
    // listening to single list item on click
    list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            // selected item
            String ssid = ((TextView) view).getText().toString();
            connectToWifi(ssid);
            Toast.makeText(ScanWifList.this,"Wifi SSID : "+ssid,Toast.LENGTH_SHORT).show();
        }
    });
}
protected void onPause() {
    unregisterReceiver(wifiReciever);
    super.onPause();
}
protected void onResume() {
    registerReceiver(wifiReciever, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
    super.onResume();
}
class WifiScanReceiver extends BroadcastReceiver {
    @SuppressLint("UseValueOf")
    public void onReceive(Context c, Intent intent) {
        List<ScanResult> wifiScanList = mainWifiObj.getScanResults();
        wifis = new String[wifiScanList.size()];
        for(int i = 0; i < wifiScanList.size(); i++){
            wifis[i] = ((wifiScanList.get(i)).toString());
        }
        String filtered[] = new String[wifiScanList.size()];
        int counter = 0;
        for (String eachWifi : wifis) {
            String[] temp = eachWifi.split(",");
            filtered[counter] = temp[0].substring(5).trim();//+"\n" + temp[2].substring(12).trim()+"\n" +temp[3].substring(6).trim();//0->SSID, 2->Key Management 3-> Strength
            counter++;
        }
        list.setAdapter(new ArrayAdapter<String>(getApplicationContext(),R.layout.list_item,R.id.label, filtered));
    }
}
private void finallyConnect(String networkPass, String networkSSID) {
    WifiConfiguration wifiConfig = new WifiConfiguration();
    wifiConfig.SSID = String.format("\"%s\"", networkSSID);
    wifiConfig.preSharedKey = String.format("\"%s\"", networkPass);
    // remember id
    int netId = mainWifiObj.addNetwork(wifiConfig);
    mainWifiObj.disconnect();
    mainWifiObj.enableNetwork(netId, true);
    mainWifiObj.reconnect();
    WifiConfiguration conf = new WifiConfiguration();
    conf.SSID = "\"\"" + networkSSID + "\"\"";
    conf.preSharedKey = "\"" + networkPass + "\"";
    mainWifiObj.addNetwork(conf);
}
private void connectToWifi(final String wifiSSID) {
    final Dialog dialog = new Dialog(this);
    dialog.setContentView(R.layout.connect);
    dialog.setTitle("Connect to Network");
    TextView textSSID = (TextView) dialog.findViewById(R.id.textSSID1);
    Button dialogButton = (Button) dialog.findViewById(R.id.okButton);
    pass = (EditText) dialog.findViewById(R.id.textPassword);
    textSSID.setText(wifiSSID);
    // if button is clicked, connect to the network;
    dialogButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String checkPassword = pass.getText().toString();
            finallyConnect(checkPassword, wifiSSID);
            dialog.dismiss();
        }
    });
    dialog.show();
}
}

如果可能，请分享任何有助于我在 android 6.0 及更高版本

中显示扫描的 wifi 网络的内容

Answer 1

自 Android 6.0（sdk 级别 23）起，WifiManager 的功能 getScanResults() 需要位置权限。

An app must hold ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission in order to get valid results.

首先添加到您的清单中：

<uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/>

然后修改你的requestPermissions添加Manifest.permission.ACCESS_COARSE_LOCATION

扫描的 wifi 结果未显示

Scanned wifi results are not showing

android

android-wifi