Circular Menu Part-1

Main Activity

public class TestMenuActivity extends Activity {

CircleView cView;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

int numberOfElements = 11;

View[] elems = new View[numberOfElements];

EditText tv = new EditText(this);

tv.setText("Some text");

tv.setLayoutParams(new RelativeLayout.LayoutParams(

RelativeLayout.LayoutParams.WRAP_CONTENT,

RelativeLayout.LayoutParams.WRAP_CONTENT));

elems[0] = tv;

for (int i = 1; i < numberOfElements - 1; i++) {

Button newButton = new Button(this);

newButton.setText("Button   " + i);

newButton.setLayoutParams(new RelativeLayout.LayoutParams(

RelativeLayout.LayoutParams.WRAP_CONTENT,

RelativeLayout.LayoutParams.WRAP_CONTENT));

elems[i] = newButton;

}

Spinner sp = new Spinner(this);

sp.setLayoutParams(new RelativeLayout.LayoutParams(

RelativeLayout.LayoutParams.WRAP_CONTENT,

RelativeLayout.LayoutParams.WRAP_CONTENT));

elems[numberOfElements - 1] = sp;

cView = new CircleView(this, 115, elems);

setContentView(cView);

}

}

How To Create Circle View (Dynamically...)

public class CircleView extends RelativeLayout {

static final int centerId = 111;

private final int radius;

private RelativeLayout.LayoutParams createNewRelativeLayoutParams() {

RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(

RelativeLayout.LayoutParams.WRAP_CONTENT,

RelativeLayout.LayoutParams.WRAP_CONTENT);

lp.addRule(RelativeLayout.ABOVE, centerId);

lp.addRule(RIGHT_OF, centerId);

return lp;

}

private View prepareElementForCircle(View elem, int distX, int distY) {

RelativeLayout.LayoutParams lp = createNewRelativeLayoutParams();

elem.measure(0, 0);

int deltaX = elem.getMeasuredWidth() / 2;

int deltaY = elem.getMeasuredHeight() / 2;

lp.setMargins(distX - deltaX, 0, 0, radius - distY - deltaY);

elem.setLayoutParams(lp);

return elem;

}

public CircleView(Context context, int radius, View[] elements) {

super(context);

this.radius = radius;

RelativeLayout.LayoutParams lpView = new RelativeLayout.LayoutParams(

RelativeLayout.LayoutParams.FILL_PARENT,

RelativeLayout.LayoutParams.FILL_PARENT);

this.setLayoutParams(lpView);

View center = new View(context);

center.setId(centerId);

RelativeLayout.LayoutParams lpcenter = new RelativeLayout.LayoutParams(

0, 0);

lpcenter.addRule(CENTER_HORIZONTAL);

lpcenter.addRule(CENTER_VERTICAL);

center.setLayoutParams(lpcenter);

this.addView(center);

this.addView(prepareElementForCircle(elements[0], 0, 0));

if (elements.length % 2 == 0) {

this.addView(prepareElementForCircle(elements[elements.length / 2],

0, 2 * radius));

}

if (elements.length > 2) {

for (int i = 1; i <= (elements.length - 1) / 2; i++) {

int y = i * 4 * radius / elements.length;

int x = (int) Math.sqrt(Math.pow(radius, 2)

- Math.pow((radius - y), 2));

this.addView(prepareElementForCircle(elements[i], x, y));

this.addView(prepareElementForCircle(elements[elements.length

- i], -x, y));

}

}

}

}