show radio button selected android code example

Example 1: recyclerview with radio button android

public class ViewHolder extends RecyclerView.ViewHolder {

     @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        boolean ischecked = position == checkedposition ? true : false;

        holder.tv.setText(productList.get(position));
        holder.tv.setChecked(lastSelectedPosition == position);
 		selectionState.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    lastSelectedPosition = getAdapterPosition();
                    notifyDataSetChanged();

                    Toast.makeText(OffersRecyclerViewAdapter.this.context,
                            "selected offer is " + offerName.getText(),
                                        Toast.LENGTH_LONG).show();
                }
            });
    }

Example 2: get string of radio button in android

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MyAndroidAppActivity extends Activity {

  private RadioGroup radioGroup;
  private RadioButton radioButton;
  private Button btnDisplay;

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

    addListenerOnButton();

  }

  public void addListenerOnButton() {

    radioGroup = (RadioGroup) findViewById(R.id.radio);
    btnDisplay = (Button) findViewById(R.id.btnDisplay);

    btnDisplay.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

                // get selected radio button from radioGroup
            int selectedId = radioGroup.getCheckedRadioButtonId();

            // find the radiobutton by returned id
            radioButton = (RadioButton) findViewById(selectedId);

            Toast.makeText(MyAndroidAppActivity.this,
                radioButton.getText(), Toast.LENGTH_SHORT).show();

        }

    });

  }
}