Android Store Radiogroup Id In Sharedpreferences And Load It

In my App i want to open a dialog window with a radiogroup with some items (each item should be an activity ) the user can choose from. The chosen item/ID should get stored in the

Solution 1:

There are many samples but ok, I'll give an example:

You can define 2 methods under your activity:

privatevoidloadSavedPreferences() {
    SharedPreferencessharedPreferences= PreferenceManager.getDefaultSharedPreferences(this);
    intselectedRadioID= sharedPreferences.getInt("SELECTED_RADIO", 0);

    if(selectedRadioID > 0) {
        // you got previously selected radioRadioButtonrb= (RadioButton)findViewById(selectedRadioID);
        rb.setSelected(true);
    }
}

privatevoidsavePreferences(String key, int radioId) {
    SharedPreferencessharedPreferences= PreferenceManager.getDefaultSharedPreferences(this);
    Editoreditor= sharedPreferences.edit();
    editor.putInt(key, radioId);
    editor.commit();
}

Use this methods on your activities onCreate method.

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stubsuper.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    loadSavedPreferences();

    RadioGrouprg= findViewById(R.id.your_radio_group_over_your_radios);
    rg.setOnCheckedChangeListener(newRadioGroup.OnCheckedChangeListener() {

        @OverridepublicvoidonCheckedChanged(RadioGroup group, int checkedId) {
            savePreferences("SELECTED_RADIO", checkedId);
        }
    });

}

You should improve this code, but this will give you the idea.