CameraTest

 from com.android.monkeyrunner import MonkeyRunner,MonkeyDevice,MonkeyImage

 #device = MonkeyRunner.waitForConnection()
 #device.startActivity(component="com.lenovo.scg/.camera.CameraLauncher")
 #MonkeyRunner.sleep(1)

 def take_picture(device):
     for i in range(1,5):
         MonkeyRunner.sleep(2)
         device.touch(541,1761,'DOWN_AND_UP')

 def switch_camera(device):
     MonkeyRunner.sleep(3)
     device.touch(989,89,'DOWN_AND_UP')

 def enter_camera(device):
     device.touch(413,1101,'DOWN_AND_UP')
     MonkeyRunner.sleep(2)

 def exit_camera(device):
     MonkeyRunner.sleep(2)
     device.press('KEYCODE_HOME', MonkeyDevice.DOWN_AND_UP)
     MonkeyRunner.sleep(3)

 def TEST_LOOP(device):
     enter_camera(device)
     take_picture(device)
     switch_camera(device)
     take_picture(device)
     exit_camera(device)

 def main():
     print "Start"
     device = MonkeyRunner.waitForConnection()

     if not device:
         print "Couldn't get connection"
         sys.exit()

     print "Found device"

     for i in range(1,300):
         TEST_LOOP(device)
         print(i)

 if __name__ == '__main__':
     main()