Eclipse ImportError：没有使用Jython解释器的名为dtmilano的模块

我使用EclipseJuno并使用Jython2.7解释器创建了PyDev项目，但我得到的Nulpointer异常如下

我的代码是

import re
import sys
import os


from com.android.monkeyrunner import MonkeyRunner

# Connects to the current device, returning a MonkeyDevice object
device = MonkeyRunner.waitForConnection()

错误如下所示

 device = MonkeyRunner.waitForConnection()
    at com.android.monkeyrunner.MonkeyRunner.waitForConnection(MonkeyRunner.java:75)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
java.lang.NullPointerException: java.lang.NullPointerException

然后我添加了AndroidViewClient，但这很可怕。我已经为AndroidViewClient设置了路径

import re
import sys
import os

try:
    ANDROID_VIEW_CLIENT_HOME = os.environ['ANDROID_VIEW_CLIENT_HOME']
except KeyError:
    print >>sys.stderr, "%s: ERROR: ANDROID_VIEW_CLIENT_HOME not set in environment" % __file__
    sys.exit(1)
sys.path.append(ANDROID_VIEW_CLIENT_HOME + '/src')

from com.dtmilano.android.viewclient import ViewClient

from com.android.monkeyrunner import MonkeyRunner

# Connects to the current device, returning a MonkeyDevice object
device = MonkeyRunner.waitForConnection()

print "Success!"

有人能帮我吗？谢谢你