SL4A获取电池状态

mport android
droid=android.Android()
name=droid.batteryGetHealth(）
print name
print name.result

结果是：
Result(id=1, result=None, error=None）
None

问题是个根据API来看
batteryGetHealth()

Returns the most recently received battery health data:
1 - unknown;
2 - good;
3 - overheat;
4 - dead;
5 - over voltage;
6 - unspecified failure;

显示的结果显然是不对的

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batterystartmonitoring()