TextField change triggers full layout cycle

Question

While looking at performance problems in my app, I discovered that each button press was triggering a call to the full onMeasure()/layout() cycle. There\'s no reason that I can

Answer 1

According to Edward's comment he managed to prevent re-layout of the whole layout tree by isolating the TextViews in their own LinearLayout. This did NOT work for me. I have lined out below what worked for me for anyone having the same problem.

I encountered a similar re-layout issue when I added a TextClock (which is derived from TextView) to my Layout: this would cause an update of the whole layout every minute on the minute.

Isolating the TextClock by putting it in its own LinearLayout or RelativeLayout with both fixed layout_width/height and fixed positioning using layout_alignParent set on this Layout didn't change the complete re-layout every minute. What did help was to simply make the size of the TextClock fixed i.e. independent from its actual contents:

Where ems="x" and lines="y" fix width and height to x "widest" characters and y lines, when layout_width/height are set to "wrap_content". Of course you could use fixed dimensions in dp (or sp, I would assume) too.