Added RadioGroup OnCheckedChangeListener annotation

butterknife/src/main/java/butterknife/OnRadioGroupCheckedChanged.java

@@ -0,0 +1,45 @@
+package butterknife;
+
+import android.view.View;
+import butterknife.internal.ListenerClass;
+import butterknife.internal.ListenerMethod;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import static android.widget.RadioGroup.OnCheckedChangeListener;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.RetentionPolicy.CLASS;
+
+/**
+ * Bind a method to an {@link OnCheckedChangeListener OnCheckedChangeListener} on the view for
+ * each ID specified.
+ * <pre><code>
+ * {@literal @}OnCheckedChanged(R.id.example) void onChecked(boolean checked) {
+ *   Toast.makeText(this, checked ? "Checked!" : "Unchecked!", LENGTH_SHORT).show();
+ * }
+ * </code></pre>
+ * Any number of parameters from
+ * {@link OnCheckedChangeListener#onCheckedChanged(android.widget.RadioGroup, int)
+ * onCheckedChanged} may be used on the method.
+ *
+ * @see OnCheckedChangeListener
+ */
+@Target(METHOD)
+@Retention(CLASS)
+@ListenerClass(
+    targetType = "android.widget.RadioGroup",
+    setter = "setOnCheckedChangeListener",
+    type = "android.widget.RadioGroup.OnCheckedChangeListener",
+    method = @ListenerMethod(
+        name = "onCheckedChanged",
+        parameters = {
+            "android.widget.RadioGroup",
+            "int"
+        }
+    )
+)
+public @interface OnRadioGroupCheckedChanged {
+  /** View IDs to which the method will be bound. */
+  int[] value() default { View.NO_ID };
+}

butterknife/src/main/java/butterknife/internal/ButterKnifeProcessor.java

@@ -12,6 +12,7 @@
 import butterknife.OnItemSelected;
 import butterknife.OnLongClick;
 import butterknife.OnPageChange;
+import butterknife.OnRadioGroupCheckedChanged;
 import butterknife.OnTextChanged;
 import butterknife.OnTouch;
 import butterknife.ResourceBool;
@@ -81,6 +82,7 @@ public final class ButterKnifeProcessor extends AbstractProcessor {
       OnItemSelected.class, //
       OnLongClick.class, //
       OnPageChange.class, //
+      OnRadioGroupCheckedChanged.class, //
       OnTextChanged.class, //
       OnTouch.class //
   );

butterknife/src/test/java/butterknife/internal/OnRadioGroupCheckChangedTest.java

@@ -0,0 +1,52 @@
+package butterknife.internal;
+
+import com.google.common.base.Joiner;
+import com.google.testing.compile.JavaFileObjects;
+import org.junit.Test;
+
+import javax.tools.JavaFileObject;
+
+import static butterknife.internal.ProcessorTestUtilities.butterknifeProcessors;
+import static com.google.common.truth.Truth.ASSERT;
+import static com.google.testing.compile.JavaSourceSubjectFactory.javaSource;
+
+public class OnRadioGroupCheckChangedTest {
+    @Test
+    public void checkedChanged() {
+        JavaFileObject source = JavaFileObjects.forSourceString("test.Test", Joiner.on('\n').join(
+                "package test;",
+                "import android.app.Activity;",
+                "import butterknife.OnRadioGroupCheckedChanged;",
+                "public class Test extends Activity {",
+                "  @OnRadioGroupCheckedChanged(1) void doStuff() {}",
+                "}"
+        ));
+
+        JavaFileObject expectedSource = JavaFileObjects.forSourceString("test/Test$$ViewBinder",
+                Joiner.on('\n').join(
+                        "package test;",
+                        "import android.view.View;",
+                        "import butterknife.ButterKnife.Finder;",
+                        "import butterknife.ButterKnife.ViewBinder;",
+                        "public class Test$$ViewBinder<T extends test.Test> implements ViewBinder<T> {",
+                        "  @Override public void bind(final Finder finder, final T target, Object source) {",
+                        "    View view;",
+                        "    view = finder.findRequiredView(source, 1, \"method 'doStuff'\");",
+                        "    ((android.widget.RadioGroup) view).setOnCheckedChangeListener(new android.widget.RadioGroup.OnCheckedChangeListener() {",
+                        "      @Override public void onCheckedChanged(android.widget.RadioGroup p0, int p1) {",
+                        "        target.doStuff();",
+                        "      }",
+                        "    });",
+                        "  }",
+                        "  @Override public void unbind(T target) {",
+                        "  }",
+                        "}"
+                ));
+
+        ASSERT.about(javaSource()).that(source)
+                .processedWith(butterknifeProcessors())
+                .compilesWithoutError()
+                .and()
+                .generatesSources(expectedSource);
+    }
+}