Working with Multiple Radio Group values in Android

Question

I have two radio groups, each contains two radio buttons. I would like to wait until a button from each group has been selected, and then display a Toast. (E.g. if radio button 1 from group 1 AND radio button 3 from group 2 aree selected, display Toast message. I am not getting any error messages with the following, but no Toast is displaying:

    <RadioGroup
        android:id="@+id/rg1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="92dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.508"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <RadioButton
            android:id="@+id/rb1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onClick"
            android:text="@string/rb1" />

        <RadioButton
            android:id="@+id/rb2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onClick"
            android:text="@string/rb2" />
    </RadioGroup>


    <RadioGroup
        android:id="@+id/rg2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="228dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <RadioButton
            android:id="@+id/rb3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onClick"
            android:text="@string/rb3" />

        <RadioButton
            android:id="@+id/rb4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onClick"
            android:text="@string/rb4" />
    </RadioGroup>
</android.support.constraint.ConstraintLayout>

JAVA CODE:

    package com.example.rgapp;

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

    public class MainActivity extends Activity {



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

        }


        public void onClick(View view) {

            boolean checked = ((RadioButton) view).isChecked();


            if (view.getId() == (R.id.rb1) & (view.getId() == (R.id.rb3)))
                Toast.makeText(getApplicationContext(), "1 and 3 selected",
                        Toast.LENGTH_SHORT).show();

        }
    }

Answer 1

Try this below xml and java

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RadioGroup
        android:id="@+id/rg1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="92dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.508"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <RadioButton
            android:id="@+id/rb1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onCustomClick"
            android:text="rb1" />

        <RadioButton
            android:id="@+id/rb2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onCustomClick"
            android:text="rb2" />
    </RadioGroup>


    <RadioGroup
        android:id="@+id/rg2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="228dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <RadioButton
            android:id="@+id/rb3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onCustomClick"
            android:text="rb3" />

        <RadioButton
            android:id="@+id/rb4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onCustomClick"
            android:text="rb4" />
    </RadioGroup>
</android.support.constraint.ConstraintLayout>

MainActivity.java :

public class MainActivity extends Activity {

    RadioButton rb1, rb3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        rb1 = (RadioButton) findViewById(R.id.rb1);
        rb3 = (RadioButton) findViewById(R.id.rb3);

        rb1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onCustomClick(v);
            }
        });
    }

    public void onCustomClick(View view) {
        boolean checked = ((RadioButton) view).isChecked();
        if (rb1.isChecked() && rb3.isChecked())
            Toast.makeText(getApplicationContext(), "1 and 3 selected",
                    Toast.LENGTH_SHORT).show();

    }
}

It will display toast, if radiobutton1 from group 1 AND radiobutton3 from group 2 are selected.