change in layout file

Add radiobutton and EditText
dimens files add
strings files add All questions
Add Radio button java code for action and result

app/src/main/java/com/example/hp/quiz/MainActivity.java

@@ -5,24 +5,38 @@
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
+import android.widget.RadioButton;
+import android.widget.RadioGroup;
 import android.widget.TextView;
 
 public class MainActivity extends AppCompatActivity {
+    private RadioGroup radioGroup1;
+    RadioButton radioButton1;
+    int score=0;
    @Override
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        final EditText editName =  findViewById(R.id.editText_name);
        final TextView displayText = findViewById(R.id.textView_name);
+       radioGroup1 = findViewById(R.id.radioGroup_Q1);
        Button showButton = findViewById(R.id.button_show);
 
        showButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String name = editName.getText().toString();
-               displayText.setText(name);
-
+               //radio button
+               int selectedId=radioGroup1.getCheckedRadioButtonId();
+               radioButton1=findViewById(R.id.radioButton_Q1_op1);
+               //if statement for radio button
+               if (selectedId==R.id.radioButton_Q1_op2) {
+                    score +=1;
+               }
+               String hell ="Thanks"+name+"your score is"+score;
+               //display value on screen
+               displayText.setText(hell);
            }
        });
    }

app/src/main/res/layout/activity_main.xml

@@ -36,39 +36,43 @@
             android:text="@string/Q1"
             android:textSize="@dimen/font_size_medium"/>
         <RadioGroup
-            android:id="@+id/rg_Q1"
+            android:id="@+id/radioGroup_Q1"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/oneSix"
             android:background="@android:color/holo_orange_light"
             android:layout_marginStart="@dimen/oneFour"
             android:layout_marginEnd="@dimen/oneFour">
             <RadioButton
-                android:id="@+id/rb_Q1_op1"
+                android:id="@+id/radioButton_Q1_op1"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/Q1_Op1"
+                android:layout_marginTop="@dimen/eight"
                 android:textSize="@dimen/font_size_medium">
             </RadioButton>
             <RadioButton
-                android:id="@+id/rb_Q1_op2"
+                android:id="@+id/radioButton_Q1_op2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/Q1_Op2"
+                android:layout_marginTop="@dimen/eight"
                 android:textSize="@dimen/font_size_medium">
             </RadioButton>
             <RadioButton
-                android:id="@+id/rb_Q1_op3"
+                android:id="@+id/radioButton_Q1_op3"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/eight"
                 android:text="@string/Q1_Op3"
                 android:textSize="@dimen/font_size_medium">
             </RadioButton>
             <RadioButton
-                android:id="@+id/rb_Q1_op4"
+                android:id="@+id/radioButton_Q1_op4"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/Q1_Op4"
+                android:layout_marginTop="@dimen/eight"
                 android:textSize="@dimen/font_size_medium">
             </RadioButton>