java.lang.NullPointerException: Attempt to invoke virtual method 'int android.hardware.usb.UsbDeviceConnection.bulkTransfer(android.hardware.usb.UsbEndpoint, byte[], int, int)' on a null object reference

GitHub | alittle | 4 months ago
  1. 0

    GitHub comment 64#240531973

    GitHub | 4 months ago | alittle
    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.hardware.usb.UsbDeviceConnection.bulkTransfer(android.hardware.usb.UsbEndpoint, byte[], int, int)' on a null object reference
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    Crash on sync

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    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.io.InputStream.read(byte[], int, int)' on a null object reference
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    Stack Overflow | 2 years ago
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.io.InputStream.read(byte[], int, int)' on a null object reference
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    inputStream.read() causes NullPointerException (after having checked inputStream!=null)

    Stack Overflow | 2 years ago | The Good Giant
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.io.InputStream.read(byte[], int, int)' on a null object reference
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    GitHub | 2 years ago | Takhion
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.io.InputStream.read(byte[], int, int)' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'int android.hardware.usb.UsbDeviceConnection.bulkTransfer(android.hardware.usb.UsbEndpoint, byte[], int, int)' on a null object reference

      at com.hoho.android.usbserial.driver.ProlificSerialDriver$ProlificSerialPort.read()
    2. com.hoho.android
      SerialInputOutputManager.run
      1. com.hoho.android.usbserial.driver.ProlificSerialDriver$ProlificSerialPort.read(ProlificSerialDriver.java:373)
      2. com.hoho.android.usbserial.util.SerialInputOutputManager.step(SerialInputOutputManager.java:159)
      3. com.hoho.android.usbserial.util.SerialInputOutputManager.run(SerialInputOutputManager.java:141)
      3 frames
    3. Java RT
      Thread.run
      1. java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
      2. java.util.concurrent.FutureTask.run(FutureTask.java:237)
      3. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
      4. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
      5. java.lang.Thread.run(Thread.java:818)
      5 frames