implement CompoundButton using GtkSwitch

src/api-impl/android/graphics/Canvas.java

@@ -383,6 +383,8 @@ public class Canvas {
 		return false;
 	}
 
+	public void restoreToCount(int count) {}
+
 	private static native void native_drawText(long skia_canvas, CharSequence text, int start, int end, float x, float y, long skia_font, long skia_paint);
 	private static native void native_drawRect(long skia_canvas, float left, float top, float right, float bottom, long skia_paint);
 	private static native void native_drawLine(long skia_canvas, long widget, float startX, float startY, float stopX, float stopY, long skia_paint);

src/api-impl/android/widget/Button.java

@@ -26,7 +26,7 @@ public class Button extends TextView {
 	protected native void native_setOnClickListener(long widget, OnClickListener l);
 
 	@Override
-	public final void setText(CharSequence text) {
+	public void setText(CharSequence text) {
 		native_setText(widget, String.valueOf(text));
 	}
 

src/api-impl/android/widget/Checkable.java

@@ -1,4 +1,6 @@
 package android.widget;
 
 public interface Checkable {
+
+    public void setChecked(boolean checked);
 }

src/api-impl/android/widget/CompoundButton.java

@@ -3,10 +3,8 @@ package android.widget;
 import android.content.Context;
 import android.util.AttributeSet;
 
-public abstract class CompoundButton extends Button {
+public abstract class CompoundButton extends Button implements Checkable {
 
-	private boolean checked;
-	
 	public CompoundButton(Context context) {
 		super(context);
 	}
@@ -15,15 +13,24 @@ public abstract class CompoundButton extends Button {
 		super(context, attributeSet);
 	}
 
+	@Override
+	protected native long native_constructor(Context context, AttributeSet attrs);
+
 	public static interface OnCheckedChangeListener {}
 
-	public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {}
+	public native void setOnCheckedChangeListener(OnCheckedChangeListener listener);
 
-	public void setChecked(boolean checked) {
-		this.checked = checked;
-	}
+	public native void setChecked(boolean checked);
 
-	public boolean isChecked() {
-		return checked;
-	}
+	public native boolean isChecked();
+
+	// following methods are overridden to prevent calling incompatible methods from superclasses
+	@Override
+	public void setOnClickListener(final OnClickListener l) {}
+	@Override
+	public void setText(CharSequence text) {}
+	@Override
+	public void setTextColor(int color) {}
+	@Override
+	public void setTextSize(float size) {}
 }

src/api-impl/android/widget/Switch.java

@@ -13,6 +13,4 @@ public class Switch extends CompoundButton {
 		super(context, attributeSet);
 	}
 
-	public void setChecked(boolean checked) {}
-
 }