问题
As I wanted to compare several apps according to their graphics performance, I wanted to measure the frame rate for each app. In DDMS I discovered a tab "System Information" where I can choose "CPU load", "Memory usage" or "Frame render time". When I select the first two options a graph gets displayed on the right. But for "Frame render time" somehow I get no data displayed (of course I already tried to click the button "Update from Device" but that didn't change anything).
I found no instruction how to use this tool. All instructions are missing exactly this topic... -_- So what am I missing? How can I display the frame render time in DDMS?
Thanks in advance!
来源：https://stackoverflow.com/questions/22758821/show-frame-rate-in-ddms