I'm doing a battery analysis of my app, I'm left with these options only:
- Disable USB charging on the device, which I have not been able to do yet and take screenshot using monkeyrunner of Settings -> Battery screen
- Without the USB cable attached, I can use simulate the down volume key + power key hold event through a shell script running on my rooted phone to take the screenshot of the Settings -> Battery screen
- Get the dumpsys battery which shows all processes like its listed in Settings -> Battery again using a shell script running in adb shell on a rooted phone, but I do not know the command
Every method has its own limitations. Is there any way in which I can achieve my objective??
With the ICS and above, all phones are bundled in with a exe named screencap in /system/bin. Run the below command line to take a screenshot
screencap -p /sdcard/screenshot.png
This can also be done by grabbing shell using Java, so you can capture sceenshot as and when you will want to.