旋转文本在画布 [英] Rotate Text in Canvas

问题描述

你如何旋转文本是在画布？我需要翻转我有倒挂的文字。

  paint.setTextSize（20）;
canvas.drawText（上午03点，xStored，yStored，油漆）;
 

解决方案

我从注释下接受答案的解决方案，通过罗曼盖伊

<一个href="http://stackoverflow.com/questions/2558257/how-can-you-display-upside-down-text-with-a-textview-in-android">How您可以显示颠倒的文本与Android的一个TextView？

引用您可以通过-1只是规模上的Y轴。

  @覆盖
  保护无效的OnDraw（帆布油画）{
      super.onDraw（画布）;
      INT CX = this.getMeasuredWidth（）/ 2;
      INT CY = this.getMeasuredHeight（）/ 2;
      canvas.scale（1F，-1f，CX，CY）;
      canvas.drawText（凌晨3点，CX，CY，P）;


}
 

完整的例子：

 公共类SView扩展视图{

    涂料P，漆;
    公共SView（上下文的背景下）{
        超（上下文）;
        // TODO自动生成构造函数存根
        P =新的油漆（）;
        p.setColor（Color.RED）;
        p.setTextSize（40）;
        油漆=新的油漆（）;
        paint.setColor（Color.BLUE）;
        paint.setTextSize（40）;
    }
  @覆盖
  保护无效的OnDraw（帆布油画）{
      super.onDraw（画布）;
      INT CX = this.getMeasuredWidth（）/ 2;
      INT CY = this.getMeasuredHeight（）/ 2;

      canvas.drawText（凌晨3点，CX，CY，油漆）;
      canvas.save（）;

      canvas.scale（1F，-1f，CX，CY）;
      canvas.drawText（凌晨3点，CX，CY，P）;
      canvas.restore（）;
}
}
 

快

How do you rotate text that is in the canvas? I need to flip the text I have upside down.

paint.setTextSize(20); 
canvas.drawText("3AM", xStored, yStored, paint);

解决方案

I got the solution from the comment by Romain Guy below the accepted answer

How can you display upside down text with a textview in Android?

Quoting You can just scale by -1 on the Y axis.

  @Override 
  protected void onDraw(Canvas canvas) {
      super.onDraw(canvas);
      int cx = this.getMeasuredWidth() / 2;
      int cy = this.getMeasuredHeight() / 2;
      canvas.scale(1f, -1f, cx, cy);
      canvas.drawText("3AM", cx, cy, p);


}

Complete Example:

public class SView extends View {

    Paint p,paint; 
    public SView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        p = new Paint();
        p.setColor(Color.RED);
        p.setTextSize(40);
        paint = new Paint();
        paint.setColor(Color.BLUE);
        paint.setTextSize(40);
    }
  @Override 
  protected void onDraw(Canvas canvas) {
      super.onDraw(canvas);
      int cx = this.getMeasuredWidth() / 2;
      int cy = this.getMeasuredHeight() / 2;

      canvas.drawText("3AM", cx, cy, paint);
      canvas.save(); 

      canvas.scale(1f, -1f, cx, cy);
      canvas.drawText("3AM", cx, cy, p);
      canvas.restore();
}
}

Snap

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