Libgdx rounds

[yajahira]

There are three circles, each round is divided into three parts where colour is given, each circle shall be rotated in different directions. How do you do that?

[emran]

My answer isn't for libgdx, it's just Android. But someone might be interested.

It's a caste show:

public class ProgressView extends View {
private Paint paint;
private float mProgress;
private final RectF oval = new RectF();
public ProgressView(Context context) {

super(context);

initPaint();

}
public void setProgress(final float progress) {

if (progress == mProgress) {

return;

}

mProgress = progress;

invalidate();

}
private void initPaint() {

paint = new Paint();

paint.setStyle(Paint.Style.FILL);

paint.setStyle(Paint.Style.STROKE);

}
@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);
float width = (float)getWidth();
float height = (float)getHeight();
float radius;
if (width > height){
    radius = height/4;
}
else{
    radius = width/4;
}
float center_x, center_y;

center_x = width/2;
center_y = height/2;

oval.set(center_x - radius, center_y - radius, center_x + radius, center_y + radius);
int initialAngle = (int)(mProgress / 100 * 360);
drawCircle(canvas, oval, 15, initialAngle);

oval.set(center_x - 2*radius/3, center_y - 2*radius/3, center_x + 2*radius/3, center_y + 2*radius/3);
initialAngle = -initialAngle;
drawCircle(canvas, oval, 10, initialAngle);

oval.set(center_x - radius/3, center_y - radius/3, center_x + radius/3, center_y + radius/3);
initialAngle = -initialAngle;
drawCircle(canvas, oval, 5, initialAngle);

}
private void drawCircle(Canvas canvas, RectF rectF, int strokeWidth, int initAngle) {

paint.setStrokeWidth(strokeWidth);
paint.setColor(Color.RED);
canvas.drawArc(rectF, initAngle, 120, false, paint);

paint.setColor(Color.YELLOW);
canvas.drawArc(rectF, initAngle + 120, 120, false, paint);

paint.setColor(Color.WHITE);
canvas.drawArc(rectF, initAngle + 240, 120, false, paint);

}

}

This is an activity using this View, where movement to different sides is achieved by ValueAnimator:

public class MainActivity extends AppCompatActivity {

private ProgressView progressBar;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
progressBar = new ProgressView(this);
setContentView(progressBar);


ValueAnimator anim = ValueAnimator.ofInt(0, 1000);
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator animation) {
        progressBar.setProgress((int)animation.getAnimatedValue());
    }
});
anim.setDuration(40000);
anim.setRepeatCount(ValueAnimator.INFINITE);
anim.start();
}

}