Nel mio progetto ho una mappa. Prima vado nella posizione del router Wifi, scruto la lista wifi e seleziono Operator2 e segnalo. Successivamente vado in un'altra posizione raccolgo gli stessi dettagli precedenti di Operator2 (non), quindi Vado in un'altra posizione ripetilo di nuovo.Come ottenere selezionato lo stesso operatore wifi dalla lista wifi ancora e ancora in Android?
Posso in primo luogo selezionare l'operatore WiFi. La prossima volta non so Come bloccare il particolare Dettagli dell'operatore selezionato in precedenza e ottenere di nuovo i dettagli dell'operatore. Per favore aiutami a risolvere questo problema.
My Code:
public class WifiReceiver extends BroadcastReceiver {
private WifiManager wifiManager;
private PlanMapperActivity viewerActivity;
private Context newContext;
private String operator;
private String macAddress;
private int signalStrength;
private String wifiMode;
private int frequency;
private String htMode;
private String security;
private int channelNumber;
private AlertDialog wifiAlertDialog;
private ListView wifiListView;
private ProgressDialog progress;
private Boolean checkWifiSelected;
private Boolean checkServayStart;
private String operatorName;
List<ScanResult> wifiSRList;
private static final String WPA2 = "WPA2";
private static final String WEP = "WEP";
private static final String EAP = "EAP";
private static final String STORED_OPERATOR = "com.kenturf.wifiheatmap.SELECTED_OPERATOR";
private int requiredLevel;
private int ssidCount;
public WifiReceiver(Context ctx,PlanMapperActivity planMapper) {
this.viewerActivity = planMapper;
this.newContext = ctx;
}
public WifiReceiver(WifiManager myWifiManager,ProgressDialog wifiProgress,Boolean isWifiSelected,Boolean isSurveyStart) {
this.wifiManager = myWifiManager;
this.progress = wifiProgress;
this.checkWifiSelected = isWifiSelected;
this.checkServayStart = isSurveyStart;
}
@Override
public void onReceive(final Context context, Intent intent) {
wifiSRList = wifiManager.getScanResults();
if (wifiSRList.size() == 0) {
Toast.makeText(context,"wifi List 0",Toast.LENGTH_SHORT).show();
}
if (checkWifiSelected) {
LayoutInflater wifiLayout = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View wifiView = wifiLayout.inflate(R.layout.dialog_fragment_wifi,null);
AlertDialog.Builder wifiDialog = new AlertDialog.Builder(context);
wifiDialog.setCancelable(false);
wifiDialog.setView(wifiView);
wifiAlertDialog = wifiDialog.create();
wifiListView = (ListView)wifiView.findViewById(R.id.user_wifi_detail);
}
Collections.sort(wifiSRList, new Comparator<ScanResult>() {
@Override
public int compare(ScanResult lhs, ScanResult rhs) {
return (lhs.level > rhs.level ? -1 : (lhs.level == rhs.level ? 0 : 1));
}
});
if (checkWifiSelected) {
String[] wifiListString = new String[wifiSRList.size()];
for (int i = 0; i < wifiSRList.size(); i++) {
wifiListString[i] = (wifiSRList.get(i).SSID);
}
wifiListView.setAdapter(new ArrayAdapter<>(context, android.R.layout.simple_list_item_1, wifiListString));
wifiAlertDialog.show();
progress.dismiss();
wifiListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
operator = wifiSRList.get(position).SSID;
macAddress = wifiSRList.get(position).BSSID;
signalStrength = wifiSRList.get(position).level;
frequency = wifiSRList.get(position).frequency;
final String cap = wifiSRList.get(position).capabilities;
final String[] securityModes = {WEP, WPA2, EAP};
for (int i = securityModes.length - 1; i >= 0; i--) {
if (cap.contains(securityModes[i])) {
security = securityModes[i];
}
}
setOperator(operator);
GetSetClass.wifiOperator = operator;
/* error start ..cannot resolved method getPreferences() */
SharedPreferences sharedPref = context.getPreferences(Context.MODE_PRIVATE); // error line
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(STORED_OPERATOR, operator);
editor.apply();
/* error end */
operatorName = operator;
setMacAddress(macAddress);
setSignalStrength(signalStrength);
setFrequency(frequency);
setSecurity(security);
setChannelNumber(convertFrequencyToChannel(frequency));
wifiAlertDialog.dismiss();
checkWifiSelected = false;
}
});
}
if(checkServayStart) {
/* error start ..cannot resolved method getPreferences()*/
SharedPreferences shPref = context.getPreferences(Context.MODE_PRIVATE); // error line
String savedOperator = shPref.getString(STORED_OPERATOR,null);
Log.e("operator : ", "saved operator is : " + savedOperator);
/* error end */
if (wifiSRList != null) {
ssidCount = wifiSRList.size();
for(int i = wifiSRList.size() - 1; i >= 0; i--) {
if (GetSetClass.wifiOperator.equals(wifiSRList.get(i).SSID)) {
String requiredOperator = wifiSRList.get(i).SSID;
requiredLevel = wifiSRList.get(i).level;
context.unregisterReceiver(this);
AlertDialog.Builder myBuilder = new AlertDialog.Builder(context);
setRequiredLevel(requiredLevel);
myBuilder.setTitle("Current Signal");
myBuilder.setMessage("Operator : " + requiredOperator + " \n\nSignal Strength : " + requiredLevel + " dBm");
myBuilder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
myBuilder.show();
} else {
Toast.makeText(context,"Operator Mismatch",Toast.LENGTH_SHORT).show();
}
}
progress.dismiss();
}
}
}
public static int convertFrequencyToChannel(int freq) {
if (freq >= 2412 && freq <= 2484) {
return (freq - 2412)/5 + 1;
} else if (freq >= 5170 && freq <= 5825) {
return (freq - 5170)/5 + 34;
} else {
return -1;
}
}
}
RISPOSTA AGGIORNAMENTO:
private static final String STORED_FILE = "com.package.name.SELECTED_FILE";
private static final String STORED_OPERATOR = "com.package.name.SELECTED_OPERATOR";
Salvare i dati SharedPreferences:
SharedPreferences sharedPref = context.getSharedPreferences(STORED_FILE,Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putString(STORED_OPERATOR, operator);
editor.apply();
ottenere i dati da SharedPreferences:
SharedPreferences shPref = context.getSharedPreferences(STORED_FILE,Context.MODE_PRIVATE);
String savedOperator = shPref.getString(STORED_OPERATOR,null);
Log.e("operator : ", "saved operator is : " + savedOperator);
La mia risposta l'ha aiutata? In caso contrario, si prega di spiegare il motivo lasciando un commento per la risposta. –
È stata aggiornata la risposta per aiutare a ottenere una condivisione di SharedPreferences all'esterno di un'attività. Spero che sia d'aiuto. –