Question

When I click the button，call drawDigit()，puzzleview is only a LinearLayout in Activity

protected void drawDigit(Canvas canvas, int digit) {
        // TODO Auto-generated method stub
        if(num < diff){
            int x = tiles.get(num).getScrollX();  // get the X coordinate of ImageView，it's 0
            int y = tiles.get(num).getScrollY();  // get the Y coordinate of ImageView，it's 0
            float height = tiles.get(num).getHeight(); // height is 0
            float width = tiles.get(num).getWidth();   // width is 0
            background.setTextSize(height * 0.75f);
            background.setStyle(Style.FILL);
            background.setTextScaleX(width/height);
            background.setTextAlign(Paint.Align.CENTER);
            canvas.drawText(digit + "", x, y, background);
            //num++;
        }
    }

How can I assign the ImageView in Layout to tiles,then get the coordinate and size?

Answer 1

You can try this :

//This is for Getting ImageView size that is fixed in layout

int imageHeight;
int imageWidth;

ImageView imageViewObj = (ImageView)findViewById(R.id.image_view_id);
ViewTreeObserver treeObsObj = imageViewObj.getViewTreeObserver();
treeObsObj.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {

    public boolean onPreDraw() {
    imageWidth= imageViewObj.getMeasuredWidth();
    imageHeight = imageViewObj.getMeasuredHeight();
    return true;
}
});

// Getting the size of the Image inside the ImageView and The size will differ based
**// on the image you placed inside the ImageView

ImageView imageObj = (ImageView)findViewById(R.id.image_view_id);
int imageWidth = imageObj.getWidth();
int imageHeight = imageObj.getHeight();