about android Drawable getBounds return Rect(0, 0 - 0, 0)

问题

i want get the bound of drawable but then i use getBounds or copyBounds method .they all return Rect(0, 0 - 0, 0). the code like this

    Drawable marker = getResources().getDrawable(
            R.drawable.tbar_single_pressed);
    Rect copyRect = marker.copyBounds();
    Rect getRect= marker.getBounds();

then the result copyRect is Rect(0, 0 - 0, 0) getRect is also Rect(0, 0 - 0, 0)

why? the marker is NOT null and i have the res tbar_single_pressed....

thx

回答1:

Drawables don't have dimensions unless they've been drawn. If you want to get the size of the image you're passing in, you can create your own rect with drawable.getIntrinsicWidth() and drawable.getIntrinsicHeight()

来源：https://stackoverflow.com/questions/10302163/about-android-drawable-getbounds-return-rect0-0-0-0