請幫幫我們我在這個問題上停留了一個多星期。Android中的Groovy庫
我正在研究一個涉及groovy的應用程序。該應用程序只是創建一個包含一些信息的PDF文檔。
創建pdf的部分是用groovy編寫的。我寫了一個小型的groovy庫,它需要一些信息並使用pdfbox創建一個pdf文檔。這個庫是在IntelliJ IDEA中開發的,它完美的工作。
現在,當我嘗試將這個groovy庫與我的android應用程序集成時,問題就出現了。我設法建立常規庫的假象,甚至libs
文件夾下將其導入到Android的工作室,但是當我嘗試運行常規庫的main
功能,應用程序崩潰與MissingPropertyException
:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.silverfix.groovytestapp, PID: 8030
groovy.lang.MissingPropertyException: No such property: EMPTY_DOC for class: app.Constants$Paths
at groovy.lang.MetaClassImpl.invokeStaticMissingProperty(MetaClassImpl.java:1004)
at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1859)
at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1835)
at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:3735)
at org.codehaus.groovy.runtime.callsite.ClassMetaClassGetPropertySite.getProperty(ClassMetaClassGetPropertySite.java:51)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:296)
at app.MainClass.initialize(MainClass.groovy:41)
at app.MainClass.main(MainClass.groovy:32)
at com.silverfix.groovytestapp.MainActivity$1.onClick(MainActivity.java:24)
at android.view.View.performClick(View.java:4780)
at android.view.View$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)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
代碼主類的常規庫:
package app
import app.components.Evaluator
import app.components.FieldRenamer
import app.components.FormMetaHolder
import app.components.FieldPopulater
import app.components.entities.DGObject
import org.apache.pdfbox.cos.COSDictionary
import org.apache.pdfbox.cos.COSName
import org.apache.pdfbox.pdmodel.PDDocument
import org.apache.pdfbox.pdmodel.PDDocumentCatalog
import org.apache.pdfbox.pdmodel.PDPage
import org.apache.pdfbox.pdmodel.PDResources
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationWidget
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm
import org.apache.pdfbox.pdmodel.interactive.form.PDField
/**
* Created by David on 26/09/2016.
*/
class MainClass {
static PDDocument document = new PDDocument()
static void main(args) {
initialize()
initiateData()
initiatePdf()
populateData()
saveDocuemnt()
}
// Initialize the document's meta data
static void initialize() {
InputStream inputStream = MainClass.class.getClassLoader().getResourceAsStream("$Constants.Paths.EMPTY_DOC")
PDDocument tempDoc = new PDDocument().load(inputStream)
}
static void initiatePdf() {
...
}
static void initiateData() {
...
}
static void populateData() {
...
}
static void saveDocuemnt() {
...
}
}
常量類代碼: 封裝應用
/** * 創建者大衛在09/10/2016。 */
class Constants {
// Paths
public static class Paths {
public static final String RESULT_FILE = "intellijPDF.pdf"
public static final String EMPTY_DOC = "dgc_empty.pdf"
public static final String IATA_DOC = "dgc_iata.pdf"
public static final String SILVER_DOC = "dgc_silverfix.pdf"
}
}
這是在MainActivity:項目層次
package com.silverfix.groovytestapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import app.MainClass;
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);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
MainClass.main(null);
}
});
}
}
圖片