Android zxing条码扫描器出现异常
使用下面的代码,我每次都会得到NotFoundException。请帮忙Android zxing条码扫描器出现异常,android,zxing,barcode-scanner,Android,Zxing,Barcode Scanner,使用下面的代码,我每次都会得到NotFoundException。请帮忙 Bitmap bMap= BitmapFactory.decodeResource(MyActivity.this.getResources(), R.drawable.barcode_dummy); int[] intArray = new int[bMap.getWidth()*bMap.getHeight()]; //copy pixel data from the Bitmap into the 'in
Bitmap bMap= BitmapFactory.decodeResource(MyActivity.this.getResources(),
R.drawable.barcode_dummy);
int[] intArray = new int[bMap.getWidth()*bMap.getHeight()];
//copy pixel data from the Bitmap into the 'intArray' array
bMap.getPixels(intArray, 0, bMap.getWidth(), 0, 0, bMap.getWidth(),
bMap.getHeight());
LuminanceSource source = new RGBLuminanceSource(bMap.getWidth(), bMap.getHeight(), intArray);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Reader reader = new MultiFormatReader();// use this otherwise ChecksumException
try {
Hashtable<DecodeHintType, Object> decodeHints = new Hashtable<DecodeHintType, Object>();
decodeHints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
//decodeHints.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);
Result result = reader.decode(bitmap ,decodeHints);
if(result!=null){
Utility.ShowToastShort(MyActivity.this,result.getText());
}
else{
Utility.ShowToastShort(MyActivity.this, "Bar code couldn't be scanned");
}
} catch (NotFoundException e) {
e.printStackTrace();
}
catch (ChecksumException e) {
e.printStackTrace();
}
catch (FormatException e) {
e.printStackTrace();
}
}
NotFoundException
正常。这意味着在图像中没有找到条形码。你必须处理好这件事,是的。您的图像旋转90度,默认情况下,条形码以正常方向查找
如果可以,您确实应该使用
IntentIntegrator
。它可以工作,并且使您不必再去弄清楚所有这些事情。您可以添加您的日志吗?E/AndroidRuntime(9580):由:java.lang.NullPointerException E/AndroidRuntime(9580)引起:com.webintesive.expertly.MyActivity.showPhotoFromImageUri(MyActivity.java:167)E/AndroidRuntime(9580):在com.webintesive.expertly.MyActivity.init(MyActivity.java:120)E/AndroidRuntime(9580):在com.webintesive.expertly.MyActivity.onCreate(MyActivity.java:84)您可以编辑您的问题,插入完整的日志并突出显示该行com.webintesive.expertly.MyActivity.showPhotoFromImageUri(MyActivity.java:167)
在您的代码+中,这是一个NullPointerException
,而不是NotFoundException
。澄清您的问题是什么。当我调试代码时,控件转到catch(NotFoundException e){e.printStackTrace();},然后应用程序停止。您好,感谢您的快速响应。根据我的要求,我不能使用IntentIntegrator。我需要从gallery扫描保存的图像。我如何使用IntentIntegrator执行此操作?最终使其正常工作。我使用的条形码扫描仪也检测不到条形码。运行上面的带有可检测条形码的图像代码,它就像魅力一样工作。谢谢
FATAL EXCEPTION:
main
E/AndroidRuntime( 9580): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.webintesive.expertly/com.webintesive.expertly.MyActivity}: java.lang.NullPointerException
E/AndroidRuntime( 9580): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2313)
E/AndroidRuntime( 9580): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2365)
E/AndroidRuntime( 9580): at android.app.ActivityThread.access$600(ActivityThread.java:156)
E/AndroidRuntime( 9580): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
E/AndroidRuntime( 9580): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 9580): at android.os.Looper.loop(Looper.java:153)
E/AndroidRuntime( 9580): at android.app.ActivityThread.main(ActivityThread.java:5336)
E/AndroidRuntime( 9580): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 9580): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 9580): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
E/AndroidRuntime( 9580): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
E/AndroidRuntime( 9580): at dalvik.system.NativeStart.main(Native Method)
`E/AndroidRuntime( 9580): Caused by: java.lang.NullPointerException`
`E/AndroidRuntime( 9580): at com.webintesive.expertly.MyActivity.showPhotoFromImageUri(MyActivity.java:167)`
`E/AndroidRuntime( 9580): at com.webintesive.expertly.MyActivity.init(MyActivity.java:120)`
`E/AndroidRuntime( 9580): at com.webintesive.expertly.MyActivity.onCreate(MyActivity.java:84)`
E/AndroidRuntime( 9580): at android.app.Activity.performCreate(Activity.java:5122)
E/AndroidRuntime( 9580): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081)
E/AndroidRuntime( 9580): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2277)
E/AndroidRuntime( 9580): ... 11 more
E/AppErrorDialog( 503): Failed to get ILowStorageHandle instance