Question

此处我再次提到ABBYY SDK中的另一个问题。

我已经完成了使用此SDK加载图像，现在我想进行ImageOperation。但是我得到了一个nullpointer异常。

错误日志：

09-24 10:27:56.170    3560-3560/com.example.docsproscan E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
        at com.example.docsproscan.EditPhoto.addWidgets(EditPhoto.java:316)
        at com.example.docsproscan.EditPhoto.onImageOperationSelected(EditPhoto.java:311)
        at com.example.docsproscan.EditPhoto.access$100(EditPhoto.java:60)
        at com.example.docsproscan.EditPhoto$3.onClick(EditPhoto.java:147)
        at android.view.View.performClick(View.java:4240)
        at android.view.View$PerformClick.run(View.java:17721)
        at android.os.Handler.handleCallback(Handler.java:730)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:5103)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:525)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
        at dalvik.system.NativeStart.main(Native Method)

代码：

snijden.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            /*bitmapHeight = resized.getHeight();
            bitmapWidth = resized.getWidth();

            ratioWidth = (double) imageViewWidth / (double) bitmapWidth;
            ratioHeight = (double) imageViewHeight  / (double) bitmapHeight;
            Bitmap bitmap = crop.crop(resized, ratioWidth, ratioHeight);
            imageView.setImageBitmap(bitmap);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            */
            Log.d("mainactivity", "" + operations.get(2));

            Log.d("operation controller", "" + new ControllerToGreyscale() + " something");
            onImageOperationSelected(operations.get(2));
        }
    });

private void onImageOperationSelected( final ImageOperation imageOperation ) {
    Log.d( "MainActivity", "onImageOperationSelected()" );
    if( imageOperation != _imageOperation ) {
        _needUpdateSource = true;
    }
    _imageOperation = imageOperation;
    _operationController = imageOperation.getController();
    addWidgets( _operationController );
    _operationController.setResultView( _imageView, IN_SAMPLE_SIZE );
}

private void addWidgets( final OperationController operationController ) {
    _controlsContainer.removeAllViews();
    final List<ParametrControl> controls = operationController.createControls( this );
    for( final ParametrControl control : controls ) {
        _controlsContainer.addView( control.getView() );
    }
}

这里的问题是它说它没有ImageOperation值。但是，示例应用程序（SDK附带）传递的值与我的应用程序相同。但是在我的应用程序上，它会提供一个nullpointer，并在它运行的示例应用程序上运行。

任何人都知道如何解决这个nullpointer问题？

-

以上代码只是使用此SDK所需的无限类的一小部分。

ImageOperation类。

public enum ImageOperation implements LabeledColoredItem {
AUTO_BRIGHTNESS_CONTRAST(R.string.auto_brightness_contrast, new ControllerAutoBrightnessContrast(),
        OperationType.FILTER),
AUTO_ENHANCE(R.string.auto_enhance, new ControllerAutoEnhance(), OperationType.FILTER),
CONVERT_TO_GREYSCALE(R.string.convert_to_greyscale, new ControllerToGreyscale(), OperationType.FILTER),
//CROP(R.string.crop, new ControllerCrop(), OperationType.FILTER),
RECOGNIZE_EDGES(R.string.recognize_edges, new ControllerRecognizeEdges(), OperationType.DETECT);

/** Text resource's ID representing the name of the operation */
private final int _labelResourceId;

private OperationController _controller;

private OperationType _type;

/**
 * @param labelResourceId
 *            text resource's ID representing the name of the operation
 * @param control
 * @param type
 *            operation type: filter/detector/preset
 */
private ImageOperation( final int labelResourceId, final OperationController control,
        final OperationType type ) {
    _labelResourceId = labelResourceId;
    _controller = control;
    _type = type;
}

public OperationController getController() {
    return _controller;
}

@Override
public String getLabel( final Context context ) {
    return context.getString( _labelResourceId );
}

public OperationType getType() {
    return _type;
}

public static enum OperationType {
    FILTER,
    DETECT,
    PRESET;
}

@Override
public int getColor( final Context context ) {
    switch( _type ) {
        case DETECT:
            return context.getResources().getColor( R.color.detectorColor );
        case FILTER:
            return context.getResources().getColor( R.color.filterColor );
        case PRESET:
            return context.getResources().getColor( R.color.presetColor );
        default:
            return -1;
    }
}

/**
 * Comparator to sort values of {@link com.example.wp08_gillz.abbyy.com.ABBY.ImageOperation}.
 * Filter operations comes first, then detectors, then presets. Inside the group - by alphabetical order.
 */
public static class ImageOperationComparator implements Comparator<ImageOperation> {
    private final Context _context;

    public ImageOperationComparator( final Context context ) {
        _context = context;
    }

    @Override
    public int compare( final ImageOperation first, final ImageOperation second ) {
        if( first._type.ordinal() < second._type.ordinal() ) {
            return -1;
        }
        if( first._type.ordinal() > second._type.ordinal() ) {
            return 1;
        }
        return first.getLabel( _context ).compareTo( second.getLabel( _context ) );
    }
}

操作值[2]的Log.d的结果：

09-24 10：27：56.162 3560-3560 / com.example.docsproscan D / mainactivity：CONVERT_TO_GREYSCALE

Answer 1

解决。添加小部件会导致错误。但是我们可能不需要这个方法，所以要调试更远的地方并从我们的应用程序中删除方法。

ABBYY Mobile Imaging SDK，Nullpointer @OnImageOperationSelected

1 个答案: