from com.android.monkeyrunner import MonkeyRunner,MonkeyDevice
from com.android.monkeyrunner.easy import EasyMonkeyDevice
from com.android.monkeyrunner.easy import By
from com.android.chimpchat.hierarchyviewer import HierarchyViewer
from com.android.hierarchyviewerlib.device import ViewNode
device = MonkeyRunner.waitForConnection()
device.startActivity(component='com.android.camera/.Camera')
MonkeyRunner.sleep(3.0)
easy_device = EasyMonkeyDevice(device) #init easymonkeydevice object must start activity at first.Because the init method
easy_device.touch(By.id('id/second_level_indicator_bar_icon'),MonkeyDevice.DOWN_AND_UP)
print By.id('id/second_level_indicator_bar_icon')
------解决方案--------------------
好像点之前要遍历控件，若页面复杂的话，效率就很低啦！