Android: Radiogroup - How to Configure the Event Listener

Android: RadioGroup - How to configure the event listener

This is how you get the checked radiobutton:

// This will get the radiogroup
RadioGroup rGroup = (RadioGroup)findViewById(r.id.radioGroup1);
// This will get the radiobutton in the radiogroup that is checked
RadioButton checkedRadioButton = (RadioButton)rGroup.findViewById(rGroup.getCheckedRadioButtonId());

To use the listener, you do this:

// This overrides the radiogroup onCheckListener
rGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()
{
    public void onCheckedChanged(RadioGroup group, int checkedId)
    {
        // This will get the radiobutton that has changed in its check state
        RadioButton checkedRadioButton = (RadioButton)group.findViewById(checkedId);
        // This puts the value (true/false) into the variable
        boolean isChecked = checkedRadioButton.isChecked();
        // If the radiobutton that has changed in check state is now checked...
        if (isChecked)
        {
            // Changes the textview's text to "Checked: example radiobutton text"
            tv.setText("Checked:" + checkedRadioButton.getText());
        }
    }
});

How to set OnClickListener on a RadioButton in Android?

I'd think a better way is to use RadioGroup and set the listener on this to change and update the View accordingly (saves you having 2 or 3 or 4 etc listeners).

    RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup);        
    radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 
    {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // checkedId is the RadioButton selected
        }
    });

Listener for RadioButton for change Fragments

For single RadioButton you can use OnClickListener as follows:

         OnClickListener listener = new OnClickListener() {
               @Override
               public void onClick(View v) {
                      RadioButton rb = (RadioButton) v;
                      Toast.makeText(your_Activity.this, rb.getText(), 
                      Toast.LENGTH_SHORT).show();
               }
         };

         RadioButton rb1 = (RadioButton) findViewById(R.id.radioButton1);
         rb1.setOnClickListener(listener);

In case of RadioGroup you need to use OnCheckedChangeListener as follows :

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

    radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 
    {
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // checkedId is the RadioButton selected

            switch(checkedId) {
                  case R.id.radioButton1:
                       // switch to fragment 1                
                       break;
                  case R.id.radioButton2:
                      // Fragment 2
                      break;
                  case R.id.radioButton3:
                      // Fragment 3
                      break;
            }   
        }
    }); 

The onCheckedChanged callback receives the ID of the newly checked button in the checkedId parameter.

Radio group onclick event not firing, how do I tell which is selected?

This problem can be solved using the following

RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);
        rg.setOnCheckedChangeListener(new OnCheckedChangeListener()
        {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId)
            {
                switch(checkedId)
                {
                case R.id.radio0:
                    // TODO Something
                    break;
                case R.id.radio1:
                    // TODO Something
                    break;
                case R.id.radio2:
                    // TODO Something
                    break;
                }
            }
        });

Alternatively

You can use custom ids rather than default one

  RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);
            rg.setOnCheckedChangeListener(new OnCheckedChangeListener()
            {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId)
                {
                    switch(checkedId)
                    {
                    case R.id.male:
                        // TODO Something
                        break;
                    case R.id.female:
                        // TODO Something
                        break;
                    case R.id.other:
                        // TODO Something
                        break;
                    }
                }
            });

RadioGroup fire OnCheckedChangeListener event on checked RadioButton

From your comments, you can set an OnClickListener on each RadioButton. However, without knowing exactly what you are trying to accomplish, I don't see this as a viable solution. Users expect a RadioButton to act in a certain way. You may want to consider changing the checked state of the RadioButton each time the user returns to this Activity.

How to add an action event for RadioButton inside a recyler view?

    Replace your holder with this :

public   class ViewHolder extends RecyclerView.ViewHolder{
    private  DatabaseReference demo;
    private   TextView name;
    private  RadioButton rb1,rb2;
    private  RadioGroup rg;

    public ViewHolder(View itemView) {
        super(itemView);
        name = itemView.findViewById(R.id.name);

        rg = itemView.findViewById(R.id.rg);
        rb1 = itemView.findViewById(R.id.rb1);
        rb2 = itemView.findViewById(R.id.rb2);

rb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                if (b){
                   demo = FirebaseDatabase.getInstance().getReference().child("IDS").child("AtdList").child("1").child("1").child(str).child("status");
            demo.setValue("Present");
            Toast.makeText(context, "updated by Present", Toast.LENGTH_SHORT).show();
                }
            }
        });

     rb2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            if (b){
                demo = FirebaseDatabase.getInstance().getReference().child("IDS").child("AtdList").child("1").child("1").child(str).child("status");

            demo.setValue("Absent");
            Toast.makeText(context, "Updated by Absent", Toast.LENGTH_SHORT).show();
            }
        }
    });  

   }
}

Add event listener for all radio buttons

In the getView of your listviews adapter create the RadioButton and set the listener.

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            res = inflater.inflate(R.layout.rowview, null);
    RadioButton radioButton = (TextView)res.findViewById(R.id.radio_view);
    radioButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    // TODO Auto-generated method stub

                }
            });

}

R.layout.rowview is the view for a single Row in you list view. R.id.radio_view is the id for your radio button within

RadioGroup calls onCheckChanged() three times

So, is there a way to avoid multiple event raising ?

Call b.setChecked(true); instead.

---

A quick look through the source code confirms that RadioGroup#check() really does call the OnCheckChangedListener three times...

1. When the current selection is unchecked,
2. When the new RadioButton is checked, and
3. When the RadioGroup saves which RadioButton is now checked.

Odd quirk.

How to get onClick event on radioButton in android

try this to get click listener to your radio button

RadioButton radioButton = (RadioButton) findViewById(R.id.yourRadioButton);
radioButton.setOnClickListener(radio_listener);// set listner to your radio button

than create a new radio_listener using below code

OnClickListener radio_listener = new OnClickListener (){
 public void onClick(View v) {
   //perform your action here
    if(v==radioButton){
       //perform your action here
    }
 }
};

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