UnsupportedCharsetException: Cp437 after zxing update

StackOverflow https://stackoverflow.com/questions/22706625

  •  23-06-2023
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Question

I just tried to update my project from zxing core 2.3.0 to 3.0.0 and experience this charset problem. Not sure yet if this is a bug or if I have to provide the charsets now in some way - can anyone shed a light on it? Should I open a issue on github for this or can I provide the charsets in any way?

java.lang.ExceptionInInitializerError
E/AndroidRuntime( 4287):    at com.google.zxing.pdf417.encoder.PDF417.<init>(PDF417.java:531)
E/AndroidRuntime( 4287):    at com.google.zxing.pdf417.encoder.PDF417.<init>(PDF417.java:525)
E/AndroidRuntime( 4287):    at com.google.zxing.pdf417.PDF417Writer.encode(PDF417Writer.java:52)
E/AndroidRuntime( 4287):    at com.google.zxing.MultiFormatWriter.encode(MultiFormatWriter.java:94)
E/AndroidRuntime( 4287):    at com.google.zxing.MultiFormatWriter.encode(MultiFormatWriter.java:47)
E/AndroidRuntime( 4287):    at org.ligi.passandroid.helper.BarcodeHelper.getBitMatrix(BarcodeHelper.java:51)
E/AndroidRuntime( 4287):    at org.ligi.passandroid.helper.BarcodeHelper.generateBarCodeBitmap(BarcodeHelper.java:23)
E/AndroidRuntime( 4287):    at org.ligi.passandroid.model.Passbook.getBarcodeBitmap(Passbook.java:322)
E/AndroidRuntime( 4287):    at org.ligi.passandroid.ui.TicketViewActivity.onCreate(TicketViewActivity.java:86)
E/AndroidRuntime( 4287):    at android.app.Activity.performCreate(Activity.java:5008)
E/AndroidRuntime( 4287):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
E/AndroidRuntime( 4287):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
E/AndroidRuntime( 4287):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
E/AndroidRuntime( 4287):    at android.app.ActivityThread.access$600(ActivityThread.java:130)
E/AndroidRuntime( 4287):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
E/AndroidRuntime( 4287):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 4287):    at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 4287):    at android.app.ActivityThread.main(ActivityThread.java:4745)
E/AndroidRuntime( 4287):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 4287):    at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 4287):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
E/AndroidRuntime( 4287):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime( 4287):    at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 4287): Caused by: java.nio.charset.UnsupportedCharsetException: Cp437
E/AndroidRuntime( 4287):    at java.nio.charset.Charset.forName(Charset.java:303)
E/AndroidRuntime( 4287):    at com.google.zxing.pdf417.encoder.PDF417HighLevelEncoder.<clinit>(PDF417HighLevelEncoder.java:128)
E/AndroidRuntime( 4287):    ... 23 more
Was it helpful?

Solution

Yes it is an extended charset for Java. The name is right and PDF417 needs it by default. Android may not support it. What happens if you choose a different encoding? That is likely the best answer if you must encode this format on Android.

EDIT: This is mostly work-around-able. https://github.com/zxing/zxing/issues/105

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