我在屏幕的中間畫了一個圓,我想從圓的中心向上向下繪製四條線a,向左和向右 ,問題是我繪製的鏈接我不能確定它們的長度繪製線的座標
@Override
protected void onDraw (Canvas canvas){
super.onDraw(canvas);
int x = getWidth();
int y = getHeight();
int radius;
radius = 25;
Paint paint = new Paint() ;
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLACK);
canvas.drawPaint(paint);
paint.setColor(Color.WHITE);
canvas.drawCircle(x/2, y/2, radius, paint);
Paint paint1 = new Paint() ;
paint1.setStyle(Paint.Style.FILL);
paint1.setColor(Color.BLACK);
canvas.drawPaint(paint1);
paint1.setColor(Color.WHITE);
canvas.drawLine(x/2, y/2, x, y/2, paint1);
canvas.drawLine(x/2, y/2, -x, y/2, paint1);
canvas.drawLine(x/2, y/2, x/2, y, paint1);
canvas.drawLine(x/2, y/2, x/2, -y, paint1);
}
那麼,這是什麼問題? – Altoyyr
@Altoyyr我想要四條線的座標 – CamlX
所以 - 你想畫4條線?一個從圈子中心向上。一個從圈子的中心向下。一個從圓圈的中心向左。還有一個從圈子的中心向右。那是對的嗎? –