CODEWITHSUNDEEP
android
Naseeb Sheoran
Naseeb Sheoran

Reputation: 473

how to save the state of radio buttons

I have made 4 radio buttons and want to save the state when any of them is clicked and then want to use that saved state in the application.How can i do that?

                    myOption1.setChecked(true);
        myOption2.setChecked(true);
        myOption3.setChecked(true);
        myOption4.setChecked(true);

Upvotes: 3

Views: 6826

Answers (3)

RajeshVijayakumar
RajeshVijayakumar

Reputation: 10622

Save that value in sharedPreferences Concept. Sample Example has been placed here that uses predefined method called addPreferencesFromResource() that will get the state of checkbox value automatically and saved in the preferences.

    public class EditPreference extends PreferenceActivity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            //setContentView(R.layout.checkboxpref);
            addPreferencesFromResource(R.layout.checkboxpref);
        }
    }

And layout Code should be this :

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"

    android:key="@string/checkbox_pref"

    android:title="@string/eidt_preferences">

<CheckBoxPreference

    android:key="@string/pref_12_time_format"

    android:title="@string/time_formats"

    android:summary="@string/twelve_hour" 

    android:defaultValue="true"/>

<CheckBoxPreference

    android:key="@string/pref_show_current_location"

    android:title="@string/show_current_location"

    android:summary="@string/using_gps_network" 

    android:defaultValue="true"/>

<CheckBoxPreference

    android:key="@string/pref_display_date"

    android:title="@string/display_date"

    android:defaultValue="true"/>

</PreferenceScreen>

Now you have retreive this stored checkbox value has follows :

SharedPreferences sharedPreference = PreferenceManager
                .getDefaultSharedPreferences(getApplicationContext());
        mTimeFormat = sharedPreference.getBoolean("pref_12_time_format", false);
        mServiceType = sharedPreference.getBoolean(
                "pref_show_current_location", false);
        mDisplayDate = sharedPreference.getBoolean("pref_display_date", false);

Upvotes: 0

karllindmark
karllindmark

Reputation: 6071

If you're only going to have 4 radio buttons all in all, you might as well store their "values" in SharedPreferences (persistant storage).

Example:

SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor shEditor = sharedPreferences.edit();

shEditor.putBoolean("checkbox_1", myOptionOne.isChecked());
shEditor.putBoolean("checkbox_2", myOptionTwo.isChecked());
shEditor.putBoolean("checkbox_3", myOptionThree.isChecked());
shEditor.putBoolean("checkbox_4", myOptionFour.isChecked());

shEditor.commit();

Use it by doing the following:

SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

 myOptionOne.setChecked(sharedPreferences.getBoolean("checkbox_1", false));
 myOptionTwo.setChecked(sharedPreferences.getBoolean("checkbox_2", false));
 myOptionThree.setChecked(sharedPreferences.getBoolean("checkbox_3", false));
 myOptionFour.setChecked(sharedPreferences.getBoolean("checkbox_4", false));

Upvotes: 4

biegleux
biegleux

Reputation: 13247

Override onSaveInstanceState() and onRestoreInstanceState() in your activity.

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
  super.onSaveInstanceState(savedInstanceState);
  savedInstanceState.putBoolean("myOption1", myOption1.isChecked());
  savedInstanceState.putBoolean("myOption2", myOption2.isChecked());
  savedInstanceState.putBoolean("myOption3", myOption3.isChecked());
  savedInstanceState.putBoolean("myOption4", myOption4.isChecked());
}

@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
  super.onRestoreInstanceState(savedInstanceState);
  myOption1.setChecked(savedInstanceState.getBoolean("myOption1"));
  myOption2.setChecked(savedInstanceState.getBoolean("myOption2"));
  myOption3.setChecked(savedInstanceState.getBoolean("myOption3"));
  myOption4.setChecked(savedInstanceState.getBoolean("myOption4"));
}

Upvotes: 5

Related Questions