pratul

def getVersionName = { ->
    try {
        def stdout = new ByteArrayOutputStream()
        exec {
            commandLine 'git', 'describe', '--dirty'
            standardOutput = stdout
        }
        return stdout.toString().trim()
    }
    catch (ignored) {

pratul

courtesy: cmpxchg aka tim murray 

suspend is the big hammer. in suspend, you turn off all peripherals, turn off the CPUs entirely, 
put the DRAM into self-refresh. power consumption is very low. if you've ever put a tablet on
a table and come back a month later to find that it's still on, that's because it's been suspend 
99.9% of the time, and it's drawing a tiny amount the whole time.

problem with suspend is that  it takes a nontrivial amount of time to enter/exit, so you can't 
do it when somebody has to interact with the phone soon. on Android, suspend never happens while 
the screen is on. if you ever wondered what a wakelock actually does, it prevents suspend. that's it.