Getting programmatically added radio button value from radio group in linear layout

Question

I am trying to get the value of a radio button that I add to a radio group and that gets added to a linear layout, and then I call the class from my activity. This is my code:

MultiChoice.java

public class MultipleChoice {

Context context;
List<String> choice_values;
String hint;

public MultipleChoice (Context context, String hint,  List<String> choice_value_array){
    choice_values = new ArrayList<String>();
    this.context = context;
    this.choice_values = choice_value_array;
    this.hint = hint;
}

public View createRadioGroup(){
    LinearLayout llContainer = new LinearLayout(context);
    llContainer.setOrientation(LinearLayout.VERTICAL);
    llContainer.addView(hintTextView());
    llContainer.addView(radioButtons());
    return llContainer;
}

private TextView hintTextView() {
    // TODO Auto-generated method stub
    TextView tvHint = new TextView(context);
    tvHint.setText(hint);
    return tvHint;
}

private RadioGroup radioButtons() {
    // TODO Auto-generated method stub
    RadioGroup rbGroup = new RadioGroup(context);
    rbGroup.setOrientation(RadioGroup.VERTICAL);
    for (String value : choice_values){
        RadioButton rbValue = new RadioButton(context);
        rbGroup.addView(rbValue);
        rbValue.setText(value);
    }
    return rbGroup;
}
}

This is how I create the control in my activity:

LinearLayout template_container = (LinearLayout) findViewById(R.id.llTemplate);
MultipleChoice mcControl = new MultipleChoice(getApplicationContext(), parts[0], choices);
control = mcControl.createRadioGroup();
template_container.addView(control);

I have tried something like this, but I'm not sure that I am trying the correct approach since it does not work:

View child = template_container.getChildAt(i);
LinearLayout v = ((LinearLayout)child);
View rgView = v.getChildAt(1);
RadioGroup rg = ((RadioGroup)rgView);

The RadioGroup is added and displayed fine. All I want to do is get the value of the selected radio button. Thanks in advance!

EDIT

This is how I get the value of an EditText and it works fine.

I get the control and add it to a List containing Views and then I do this with it to ghet the value if the view contains an EditText:

String text = ((EditText)view).getText().toString().trim();

Answer 1

I solved the problem by adding a onCheckChanged listener to the radio buttons on creation and then saved the selected value to shared preferences. When I needed the values I just got all the shared preferences by iterating through the ids that I used as the key in the shared prefs. My code:

private RadioGroup radioButtons(final int radio_id) {
    // TODO Auto-generated method stub
    RadioGroup rbGroup = new RadioGroup(context);
    rbGroup.setOrientation(RadioGroup.VERTICAL);
    for (final String value : choice_values) {
        RadioButton rbValue = new RadioButton(context);
        rbGroup.addView(rbValue);
        rbValue.setText(value);
        rbValue.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
                // TODO Auto-generated method stub
                savePreferences("" + radio_id, value);
            }

        });
    }
    return rbGroup;
}



private void savePreferences(String key, String value) {

    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);

    Editor editor = sharedPreferences.edit();
    editor.putString(key, value);
    editor.commit();
}

And getting the values:

int radio_check = 0;
for (View view : addedControls) {
            String entered_value = getControlValue(view, radio_check);
            radio_check++;
        }

In my getValue() method:

text = loadSavedPreferences("" + (radio_check));

LoadPrefs method:

private String loadSavedPreferences(String key) {

    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());

    String name = sharedPreferences.getString(key, "Default");
    return name;
}

Answer 2

This may be really helpful: http://developer.android.com/guide/topics/ui/controls/radiobutton.html#HandlingEvents

You may need to add an id to your radio buttons.

Answer 3

You can set an id on the radio button programatically. PLease check here

Android: View.setID(int id) programmatically - how to avoid ID conflicts?

And then use findviewbyId to get the radio button

Answer 4

You can try this: First add an id to radiogroup using: android:id="@+id/radiogroup"

RadioGroup rbGroup = (RadioGroup)findViewById(R.id.radiogroup);

int RadioButtonId=rbGroup.getCheckedRadioButtonId();
        View radioButton = rbGroup.findViewById(RadioButtonId);

        String = Integer.toString(rbGroup.indexOfChild(radioButton)+1);

you can also add ID programatically using:

View.setId(int id);