我试图与pdfbox和groovy一起工作。我编写了一个代码，它以字符串格式获取一些信息，并使用该信息创建一个pdf文档。我想将此代码集成到我正在创建的Android应用程序中。
我在intellij IDEA中运行了代码并且它工作得非常好，但是当我尝试在Android Studio中运行代码时，我在代码的某些部分得到了一个MissingPropertyException，这在Android Studio上完全没有效果。此部分中的代码使用PDRectangle类中名为getWidth（）的方法。我确信在这个特定的类中有一个这样的方法。那么为什么我仍然继续得到这个MissingMethodExceptions？
错误输出：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.silverfix.groovytestapp, PID: 5723
groovy.lang.MissingMethodException: No signature of method: org.apache.pdfbox.pdmodel.common.PDRectangle.getWidth() is applicable for argument types: () values: []
Possible solutions: getAt(java.lang.String), with(groovy.lang.Closure), getClass()
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:58)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:49)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
at dgdlib.components.FormMetaHolder$_setupSizes_closure1.doCall(FormMetaHolder.groovy:41)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:294)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1024)
at groovy.lang.Closure.call(Closure.java:414)
at groovy.lang.Closure.call(Closure.java:430)
at org.codehaus.groovy.runtime.DefaultGroovyMethods.collect(DefaultGroovyMethods.java:3170)
at org.codehaus.groovy.runtime.DefaultGroovyMethods.collect(DefaultGroovyMethods.java:3140)
at org.codehaus.groovy.runtime.dgm$66.invoke(Unknown Source)
at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:274)
at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:56)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
at dgdlib.components.FormMetaHolder.setupSizes(FormMetaHolder.groovy:26)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.call(PogoMetaMethodSite.java:71)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
at dgdlib.DGDExecuter.initialize(DGDExecuter.groovy:48)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:166)
at dgdlib.DGDExecuter.execute(DGDExecuter.groovy:36)
at com.silverfix.groovytestapp.MainActivity$1.onClick(MainActivity.java:52)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
以下是我运行groovy代码的活动代码：
package com.silverfix.groovytestapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import java.util.ArrayList;
import java.util.List;
import dgdlib.Constants;
import dgdlib.DGDExecuter;
import dgdlib.components.entities.DGObject;
public class MainActivity extends AppCompatActivity {
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.create_doc);
// DGObject class represents a specific object which has its own attributes that needs to be inserted to the pdf
final List<DGObject> goods = new ArrayList();
DGObject object = new DGObject("3456", "2.3", "Packing Group", "Description", "Qunatity Type"
,"Packing Instructions", "Authorization");
goods.add(object);
final Bundle properties = new Bundle();
// Insert some information to this bundle
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new DGDExecuter().execute(MainActivity.this, properties, goods);
}
});
}
}
这是FormMetaHolder类：
package app.components
import app.components.entities.FieldMeta
import org.apache.pdfbox.cos.COSName
import org.apache.pdfbox.pdmodel.PDResources
import org.apache.pdfbox.pdmodel.font.PDFont
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationWidget
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm
import org.apache.pdfbox.pdmodel.interactive.form.PDField
import org.apache.pdfbox.pdmodel.interactive.form.PDTextField
/**
* Created by David on 19/10/2016.
*/
class FormMetaHolder {
def mapOfSizes = []
FormMetaHolder() {
}
void setupSizes(PDAcroForm acroForm) {
def fields = acroForm.getFields()
fields.collect() { PDField field ->
String name = field.getFullyQualifiedName()
char lastChar = name[-1]
if(lastChar == '1') {
name = name.substring(0, name.size() - 1)
lastChar = name[-1]
}
if(!Character.isDigit(lastChar)) {
// Getting the real width of the text field's rectangle
if(field instanceof PDTextField) {
PDAnnotationWidget widget = field.getWidgets().get(0)
float width = widget.getRectangle().getWidth()
// Getting the font appearance of the text field
String defaultAppearance = field.getDefaultAppearance()
String[] parts = defaultAppearance.split(" ")
COSName fontName = COSName.getPDFName(parts[0].substring(1));
float fontSize = Float.parseFloat(parts[1])
PDFont font
PDResources resources
resources = widget.getNormalAppearanceStream().getResources()
if(resources != null) {
font = resources.getFont(fontName)
}
if(font == null) {
font = acroForm.getDefaultResources().getFont(fontName)
}
// Adding the metadata regarding the field to the map object
FieldMeta meta = new FieldMeta(fieldName: name, fieldWidth: width, fontSize: fontSize, font : font)
mapOfSizes << meta
}
}
}
}
FieldMeta getMetaData(String fieldName) {
mapOfSizes.find {FieldMeta meta -> meta.fieldName == fieldName}
}
}
具体地说，groovy代码中的部分在运行时失败：
PDAnnotationWidget widget = field.getWidgets().get(0)
PDRectangle rectangle = widget.getRectangle()
float width = rectangle.getWidth()
这里有什么问题？
以下是项目层次结构的图像：https://i.gyazo.com/70a3683f6f78d7b02d63defc4e7b2c2c.png
这是PDRectangle类的图像，特别是方法getWidth（）的部分：https://i.gyazo.com/5086b7536c690005127b76fff41cae83.png
