Question

I am a newbie to Android programming.

I want two radio buttons that when clicked it will change the spinner array.

I know it sounds simple. I have it all working but I am not sure how to implement the onclickchange to make this happen. I have attached the code.

I am having an awful time trying to get my head around how to set this listener. Also, I have no errors, and spinner works, just can’t get it to change arrays.

Any guidance is greatly appreciated.
Cheers,

I attempted to create it with the listener, but it doesnt work, any advice is appreciated.

Xml

<RadioGroup
    android:id="@+id/radiogroup"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <RadioButton
        android:id="@+id/radiobutton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="true"
        android:text="@string/radio1" />

    <RadioButton
        android:id="@+id/radiobutton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/radio2" />
</RadioGroup>

java

    @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.canprovselect);


    RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radiogroup1);

    int checkedRadioButton = radioGroup.getCheckedRadioButtonId();

    Spinner spinner = (Spinner) findViewById(R.id.spinner);     
    ArrayAdapter<CharSequence> adapter = null;

    String radioButtonSelected = "";
    switch (checkedRadioButton) {
    case R.id.radiobutton3 : radioButtonSelected = "radiobutton1";

    adapter = ArrayAdapter.createFromResource(
            this, R.array.prov_array, android.R.layout.simple_spinner_item);     
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);     
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(new OnItemSelected(
            ));

    break;
    case R.id.radiobutton4 : radioButtonSelected = "radiobutton2";
    adapter = ArrayAdapter.createFromResource(             
            this, R.array.prov1_array, android.R.layout.simple_spinner_item);     
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);     
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(new OnItemSelected(
            ));

    break;
    }

My attempt at a listener

public class CanProvselect extends Activity {

RadioButton myOption1, myOption2;

/** Called when the activity is first created. */

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.canprovselect);
    myOption1 = (RadioButton)findViewById(R.id.radio_1); 
    myOption2 = (RadioButton)findViewById(R.id.radio_2); 
    myOption1.setOnClickListener(myOptionOnClickListener); 
    myOption2.setOnClickListener(myOptionOnClickListener); 

    OnClickListener myOptionOnClickListener = null;

    Spinner spinner = (Spinner) findViewById(R.id.spinner);     
    ArrayAdapter<CharSequence> adapter = null;


}

RadioButton.OnClickListener myOptionOnClickListener = 
        new RadioButton.OnClickListener() 
{

    @Override 
public void onClick(View v) { 
        // TODO Auto-generated method stub 
        //switch (checkedRadioButton) {     
        myOption1 : radioButtonSelected = "radio_1";      
        adapter = ArrayAdapter.createFromResource(             
                this, R.array.prov_array, android.R.layout.simple_spinner_item);          
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);          
        spinner.setAdapter(adapter);     
        spinner.setOnItemSelectedListener(new OnItemSelected(             
                ));

        myOption2 : radioButtonSelected = "radio_2";     
        adapter = ArrayAdapter.createFromResource(                          
                this, R.array.prov1_array, android.R.layout.simple_spinner_item);          
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);          
        spinner.setAdapter(adapter);     
        spinner.setOnItemSelectedListener(new OnItemSelected(             
        )); 
    }
}

}

Answer 1

You need to set radioGroup.setOnClickListener(yourListenerClass). Here is an example.Radio button onclick event

In that there is onClick method with Toast message, replace that with your listview population code.