java.lang.NullPointerException

JIRA | Alex Lochmann | 4 years ago
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    NPE on Environment.getExternalStorageState()?

    Stack Overflow | 3 years ago | Vyshakh Amarnath
    java.lang.NullPointerException
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    GitHub | 5 months ago | WenruiCui
    java.lang.NullPointerException: Attempt to invoke interface method 'android.os.storage.StorageVolume[] android.os.storage.IMountService.getVolumeList(int, java.lang.String, int)' on a null object reference

Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at android.os.Environment.getExternalStorageState()
  2. Android Platform
    Environment.getExternalStorageState
    1. android.os.Environment.getExternalStorageState(Environment.java:592)
    1 frame
  3. com.android.systemui
    StorageNotification$1.run
    1. com.android.systemui.usb.StorageNotification.onUsbMassStorageConnectionChangedAsync(StorageNotification.java:103)
    2. com.android.systemui.usb.StorageNotification.access$000(StorageNotification.java:34)
    3. com.android.systemui.usb.StorageNotification$1.run(StorageNotification.java:92)
    3 frames
  4. Android Platform
    HandlerThread.run
    1. android.os.Handler.handleCallback(Handler.java:725)
    2. android.os.Handler.dispatchMessage(Handler.java:92)
    3. android.os.Looper.loop(Looper.java:137)
    4. android.os.HandlerThread.run(HandlerThread.java:60)
    4 frames