在画布之上的Andr​​oid地方的ImageView [英] Android place ImageView on top of Canvas

问题描述

我怎么能显示在pv​​iously创建的视图画布$ P $之上的编程方式创建的ImageView？我试着用bringToFront（），但没有成功。

how can I display a programmatically created ImageView on top of a previously created View Canvas? I tried using bringToFront(), but without success.

code：

RelativeLayout root = findViewById(R.id.layout);
ImageView img = new ImageView(GameGuessActivity.context);
img.setImageResource(R.drawable.image);

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(width, height);
params.leftMargin = x;
params.topMargin = y;
root.addView(img, params);
img.bringToFront();

正在显示的图像，但在画布上，这是我不希望的下方。

The Image is being displayed, but underneath the canvas, which I don't want.

推荐答案

您必须重新绘制在画布上的ImageView的：

You have to redraw your imageview on canvas:

  pcanvas = new Canvas();
        pcanvas.setBitmap(bitmap);    // drawXY will result on that Bitmap
        pcanvas.drawBitmap(bitmap, 0, 0, null); 
        mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
        image.draw(pcanvas);

        img.bringToFront();
        img.invalidate();
        img.draw(pcanvas);

这篇关于在画布之上的Andr​​oid地方的ImageView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！