Android-universal-image-loader: StorageUtils.getCacheDirectory 中的 java.lang.NullPointerException

你好。 我收到了来自我的用户的错误日志。

java.lang.RuntimeException: Unable to create application my.CustomApplication: java.lang.NullPointerException
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4584)
at android.app.ActivityThread.access$1600(ActivityThread.java:161)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1325)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5356)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException
at android.os.Environment.getStorageState(Environment.java:715)
at android.os.Environment.getExternalStorageState(Environment.java:690)
at com.nostra13.universalimageloader.utils.getCacheDirectory(SourceFile:68)
at my.CustomApplication.onCreate(SourceFile:97)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1025)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4581)
... 10 more

设备规格：
型号 SCH-I545
安卓 4.2.2

我的线路 №97

File cacheDir = StorageUtils.getCacheDirectory(getApplicationContext());