Question

I have created activity which extends preferenceActivity. In that activity I have opened custom dialog which shows list of item. Whenever i click on item in listview , dialog closed. At that time i want to store the selected item in SharedPreference so that i an get that item in application wide.

But my problem is How do i store that selected item in SharedPreference ??

And when i open my application next time, i should able to retrive previous seleced item.

Here is my code for PreferenceActivity :

public class SettingsActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener 
{
    SharedPreferences myprefs;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.settings);
        addPreferencesFromResource(R.xml.prefs);

        PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(this);

        Preference prefereces=findPreference("alertdialog_Font_Style");
        prefereces.setOnPreferenceClickListener(new OnPreferenceClickListener() {

            public boolean onPreferenceClick(Preference preference) {
                // TODO Auto-generated method stub
                DialogFontStyle objdialog = new DialogFontStyle(SettingsActivity.this,R.style.CustomDialogTheme);
                objdialog.show();
                return true;
            }


        });
    }

Here is my class for dialog :

public class DialogFontStyle extends Dialog {

    public DialogFontStyle(Context context, int theme) {
        super(context, theme);
        // TODO Auto-generated constructor stub
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.dialog_layout);

        final String[] sizeType = new String[] {"a" , "b" , "c" , "d"};       

            final ListView lst = (ListView)findViewById(android.R.id.list);

            ArrayAdapter<String> adapter = new ArrayAdapter<String> (context,android.R.layout.simple_list_item_1,sizeType);                  
         lst.setAdapter(adapter);

             lst.setOnItemClickListener(new OnItemClickListener() {
                 public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                        long arg3) {
                    // TODO Auto-generated method stub

                    dismiss();
                }
             });
    } 
}

Please give me some solution to store data in sharedpreference.
Thanx.

Answer 1

To write something to share preferences use this code:

SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences( mContext );
SharedPreferences.Editor editor = mPrefs.edit();
editor.putBoolean( KEY, VALUE );
editor.commit();

mContext should be context of your activity or application not dialog. Or if your dialog is within your activity use SettingsActivity.this or create class member mContext and initi in on onCreate()