Get RelativeLayout dimensions

Question

How do I get the measurements of a certain layout like linearlayout or relativelayout with its layout_width and layout_height set to wrap_content? using this method

 layout.measure(MeasureSpec.makeMeasureSpec(0,
            MeasureSpec.UNSPECIFIED),
            MeasureSpec.makeMeasureSpec(0,
                    MeasureSpec.UNSPECIFIED));

 layout.layout(0, 0,
            layout.getMeasuredWidth(),
            layout.getMeasuredHeight());

returns null. I'm trying to create a bitmap image out of the relativelayout, kinda like a screenshot.

Answer 1

Don't do it on the onCreate() method. Try this:

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if (hasFocus == true) {
        LinearLayout myLinearLayout = (LinearLayout) findViewById(R.id.myLinearLayout);
        int layoutWidth = myLinearLayout.getWidth();
        int layoutHeight = myLinearLayout.getHeight();
    }
}

This method is called after onCreate(), when the sizes are already known.

Answer 2

You can use getMeasuredWidth() and getMeasuredHeight() on your view.

Remember the view has to have been layout first. You just CANNOT do it in onCreate, because the sizes are not known yet. You have to wait until it has been layout.