IssueTracker

The Environment.getExternalStorageState() calls through the ServiceManager.getService("mount") to discover the IMountService which can return null if service is not available. The caller here does not check for null value at http://androidxref.com/5.1.0_r1/xref/frameworks/base/core/java/android/os/Environment.java#869.

We are seeing fare number of crashes when trying to access this method during the application startup, specifically on api 21 devices. Some of the device models seeing this on: GT-I9505, SM-N900, SGH-I337M, SM-G900F

Here is the stack trace:

java.lang.NullPointerException: Attempt to invoke interface method 'android.os.storage.StorageVolume[] android.os.storage.IMountService.getVolumeList()' on a null object reference
        at android.os.Environment.getStorageVolume(Environment.java:908)
        at android.os.Environment.getExternalStorageState(Environment.java:758)
        at android.os.Environment.getExternalStorageState(Environment.java:736)