Radio Button Understanding Code

Author: Ashleshk

radiobutton/radiobutton.java

@@ -0,0 +1,52 @@
+package com.example.lenovo.radiobutton;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.app.Activity;
+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 radiobutton extends Activity {
+
+    private RadioGroup radiogroup;
+    private RadioButton radiobutton;
+    private Button btnDisplay;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_radiobutton);
+
+        addListenerOnButton();
+
+    }
+
+    public void addListenerOnButton() {
+
+        radiogroup = (RadioGroup) findViewById(R.id.radioquestion);
+        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(radiobutton.this,
+                        radiobutton.getText(), Toast.LENGTH_SHORT).show();
+
+            }
+
+        });
+
+    }
+}