Question

I am trying to extract the bitmap associated to the displayed TextView instance, but it always returns a null value. What Am I doing wrong? Should I use textview.draw(canvas) instead?

    TextView textview = (TextView) findViewById(R.id.text_title);
    textview.setDrawingCacheEnabled(true);
    textview.buildDrawingCache();        
    Bitmap bmp = textview.getDrawingCache();

Answer 1

Do this before getting drawing cache it will solve the problem

view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); 

and then getDrawingCache() will return a bitmap and draw that bitmap on your canvas.

and if you are using bitmaps in your app prefer to clear them from memory by calling recycle() method on them so that bitmap get cleared from the memory for your safe side to avoid outOfMemoryException