Radio Buttons Tutorial - Android Studio Tutorials

Create New Project

• Application Name : Radio Group Example
• Company Name : tutorialscafe.com (this will make the package name : com.tutorialscafe.radiogroupexample)
• Project Location : C:\Users\USER\AndroidStudioProjects\RadioGroupExample
• Select the Minimum SDK for you app:
  • Check the Phone and Tablet option if you are going to create app for mobile and Tab
• Add an activity to Mobile : slect an empty activity template
• Name your activity and layout file
• Click on finish Button (it will take some time to finish the Gradle Build)

Create XML

Click on the Project Tab to open the project files

Navigate to app > res > layout > activity_main.xml in project column

place that code in there

Create JAVA

Click on the Project Tab to open the project files

Navigate to app > java > Package Name > MainActivity.java in project column

place that code in there

package jovial.etutorialscafe.radiobutton;

import android.support.annotation.IdRes;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    RadioGroup rate;
    RadioButton exce,good,avg,poor;
    String ratecomment = "";
    Button buttonSumbit;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

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

        exce = (RadioButton)findViewById(R.id.excelentID);
        good = (RadioButton)findViewById(R.id.goodID);
        avg = (RadioButton)findViewById(R.id.avdID);
        poor = (RadioButton)findViewById(R.id.poorID);

        buttonSumbit = (Button)findViewById(R.id.buttonID);

        rate.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {

                switch (rate.indexOfChild(findViewById(group.getCheckedRadioButtonId()))){
                    case 0:
                        ratecomment = "Excellent";
                        break;
                    case 1:
                        ratecomment = "Good";
                        break;
                    case 2:
                        ratecomment = "Average";
                        break;
                    case 3:
                        ratecomment = "Poor";
                        break;
                }
            }
        });

        buttonSumbit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, ratecomment + " : Ratting Submited", Toast.LENGTH_SHORT).show();
            }
        });

    }
}

Run App

Start Emulator by clicking on the AVD Manager

Start Emulator

Click on the RUN icon or press SHIFT + F10