SharedPreferences issue in my toggle

Question

I've got a problem using sharedpreferences in my toggle button. First, i declared what i need:

public SharedPreferences preferences;
public WifiManager wifiManager;
ToggleButton wifitoggle;

Then the "action" onClikc

// toggle wifi
    public void wifi (View view) {
        wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
        boolean wifion = ((ToggleButton) view).isChecked();
        if (wifion) {
            wifiManager.setWifiEnabled(true);
            // Shared preferences
            SharedPreferences.Editor editor = preferences.edit();
            editor.putBoolean("togglewifi", true); // value to store
            editor.commit();

        }else{
            wifiManager.setWifiEnabled(false);
            // Shared preferences
            SharedPreferences.Editor editor = preferences.edit();
            editor.putBoolean("togglewifi", false); // value to store
            editor.commit();

        }
    }

and in my onCreate i reported the value:

boolean togglewifi = preferences.getBoolean("togglewifi", false);  //default è false
        if (togglewifi) 
        {

            wifitoggle.setChecked(true);
        }
            else
        {
            wifitoggle.setChecked(false);
        }

But when i run the application it crashes. The strange thing is that the logCat say nothing. No errors.. Have i missed something? Thanks for help

Are you absolutely sure there is nothing in logcat? Try filtering for errors, it is likely you're missing a permission to interact with the WifiManager. — JoxTraex, Nov 11 '13 at 11:39
http://stackoverflow.com/questions/12639899/shared-preferences-in-android/12640072#12640072 you can refer this. — Akhilesh Mani, Nov 11 '13 at 12:00

WOLVERINE · Accepted Answer · 2013-11-11T12:14:01.083

1

try this:

SharedPreferences sPref = getSharedPreferences(PREFS_NAME, 0);
Editor editor = sPref.edit();
editor.putBoolean("KEY", true/false);
editor.apply();

edited Nov 11 '13 at 12:14

answered Nov 11 '13 at 11:47

WOLVERINE

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where `PREFS_NAME` is like `static final String PREFS_NAME = "MyPreferences";`? – David_D Nov 11 '13 at 11:49
anyway: `The method putBoolean(String, boolean) in the type SharedPreferences.Editor is not applicable for the arguments (String, String)` – David_D Nov 11 '13 at 11:50
yes, PREFS_NAME is like static final String PREFS_NAME = "MyPreferences"; – WOLVERINE Nov 11 '13 at 12:13
only one thing, this your code have i to put over `SharedPreferences.Editor editor = preferences.edit(); editor.putBoolean("togglewifi", true); // value to store editor.commit();`? or in onCreate? – David_D Nov 11 '13 at 12:39

score 0 · Answer 2 · answered Nov 11 '13 at 12:06

You need to initialize your sharedprefereneces.

SharedPreferences sharedPreferences=context.getSharedPreferences(sharedPreferenceName, Context.MODE_PRIVATE);
SharedPreferences.Editor editor=sharedPreferences.edit();

Here, sharedPreferenceName should be a name through which you are going to access the value stored. If it does not match, you won't be able to access the value in sharedpreference.

SharedPreferences issue in my toggle

2 Answers2