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Code Issues Releases Wiki Activity

handle uncaught NPE causing App termination in prolific driver controlline background thread

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This commit is contained in:
Kai Morich 2024-05-13 22:06:38 +02:00
parent 28506a9bf9
commit 9bc3834eff
1 changed files with 7 additions and 6 deletions
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13
usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/ProlificSerialDriver.java
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@ -122,7 +122,7 @@ public class ProlificSerialDriver implements UsbSerialDriver {
private volatile Thread mReadStatusThread = null; private volatile Thread mReadStatusThread = null;
private final Object mReadStatusThreadLock = new Object(); private final Object mReadStatusThreadLock = new Object();
private boolean mStopReadStatusThread = false; private boolean mStopReadStatusThread = false;
private IOException mReadStatusException = null; private Exception mReadStatusException = null;
public ProlificSerialPort(UsbDevice device, int portNumber) { public ProlificSerialPort(UsbDevice device, int portNumber) {
@ -201,8 +201,8 @@ public class ProlificSerialDriver implements UsbSerialDriver {
private void readStatusThreadFunction() { private void readStatusThreadFunction() {
try { try {
byte[] buffer = new byte[STATUS_BUFFER_SIZE];
while (!mStopReadStatusThread) { while (!mStopReadStatusThread) {
byte[] buffer = new byte[STATUS_BUFFER_SIZE];
long endTime = MonotonicClock.millis() + 500; long endTime = MonotonicClock.millis() + 500;
int readBytesCount = mConnection.bulkTransfer(mInterruptEndpoint, buffer, STATUS_BUFFER_SIZE, 500); int readBytesCount = mConnection.bulkTransfer(mInterruptEndpoint, buffer, STATUS_BUFFER_SIZE, 500);
if(readBytesCount == -1) if(readBytesCount == -1)
@ -217,8 +217,9 @@ public class ProlificSerialDriver implements UsbSerialDriver {
} }
} }
} }
} catch (IOException e) { } catch (Exception e) {
mReadStatusException = e; if (isOpen())
mReadStatusException = e;
} }
//Log.d(TAG, "end control line status thread " + mStopReadStatusThread + " " + (mReadStatusException == null ? "-" : mReadStatusException.getMessage())); //Log.d(TAG, "end control line status thread " + mStopReadStatusThread + " " + (mReadStatusException == null ? "-" : mReadStatusException.getMessage()));
} }
@ -249,8 +250,8 @@ public class ProlificSerialDriver implements UsbSerialDriver {
} }
} }
/* throw and clear an exception which occured in the status read thread */ /* throw and clear an exception which occurred in the status read thread */
IOException readStatusException = mReadStatusException; Exception readStatusException = mReadStatusException;
if (mReadStatusException != null) { if (mReadStatusException != null) {
mReadStatusException = null; mReadStatusException = null;
throw new IOException(readStatusException); throw new IOException(readStatusException);