我如何在SurfaceView

Question

旋轉文本180度要繪製的SurfaceView文本看起來像下面

給我怎樣才能做到這一點的圖像。請幫幫我。

Answer 1

使用以下代碼替換onDraw（Canvas canvas）方法。

@Override 
protected void onDraw(Canvas canvas) 
{ 
    canvas.drawColor(Color.WHITE);  

    int cx = 240; // screenWidth/2 
    int cy = 400; // screenHeight/2 

    Paint paint = new Paint(); 
    paint.setTextSize(30); 
    paint.setColor(Color.BLACK); 
    paint.setAntiAlias(true); 

    canvas.drawText("Name: A", 20, 40, paint); 

    canvas.save(); 
    canvas.rotate(180, 240, 400); 
    canvas.drawText("Name: B", 20, 40,paint); 
    canvas.restore(); 
}