android – 如何镜像整个显示？

public class Customcatontainer extends LinearLayout {

    public Customcatontainer(Context context) {
        super(context);
        this.setWillNotDraw(false); 
    }

    public Customcatontainer(Context context,AttributeSet attrs) {
        super(context,attrs);
        this.setWillNotDraw(false); 
    }

    public Customcatontainer(Context context,AttributeSet attrs,int defStylE) {
        super(context,attrs,defStylE);
        this.setWillNotDraw(false); 
    }

    @Override
    protected void dispatchDraw(Canvas canvas) {
        canvas.save(Canvas.MATRIX_SAVE_FLAG);
        // Flip the view canvas
        if (MyHUDActivity.mHUDModE) canvas.scale(1,-1,getWidth(),getHeight()/2f); 
        super.dispatchDraw(canvas); 
        canvas.restore();
    }

    @Override
    public Boolean dispatchTouchEvent(MotionEvent event) {
        // If in HUD mode then flip the touch zones
        if (MyHUDActivity.mHUDModE) event.setLOCATIOn(event.getX(),getHeight()-event.getY());
        return super.dispatchTouchEvent(event); 
    }
}