Android 打印的PDF文档始终会导致PDF损坏
我正在尝试创建一个基于用户在我的Android应用程序中显示的表单的PDF文档。我使用以下代码创建PDF文件,然后将其附加到电子邮件:Android 打印的PDF文档始终会导致PDF损坏,android,pdf,pdf-generation,Android,Pdf,Pdf Generation,我正在尝试创建一个基于用户在我的Android应用程序中显示的表单的PDF文档。我使用以下代码创建PDF文件,然后将其附加到电子邮件: public static File generate(View salesFragmentTableLayout, Context context) throws KingdomSpasException { Builder printAttrsBuilder = new Builder(); printAttrsBuilder
public static File generate(View salesFragmentTableLayout, Context context) throws KingdomSpasException {
Builder printAttrsBuilder = new Builder();
printAttrsBuilder.setMediaSize(PrintAttributes.MediaSize.ISO_A4);
printAttrsBuilder.setMinMargins(new Margins(5, 5, 5, 5));
PrintedPdfDocument document = new PrintedPdfDocument(context, printAttrsBuilder.build());
PageInfo pageInfo = new PageInfo.Builder(150, 150, 1).create();
Page page = document.startPage(pageInfo);
salesFragmentTableLayout.draw(page.getCanvas());
document.finishPage(page);
File result = null;
try {
result = File.createTempFile("Kingdom Spas Agreement", ".pdf", context.getCacheDir());
document.writeTo(new BufferedOutputStream(new FileOutputStream(result)));
} catch (FileNotFoundException e) {
throw new KingdomSpasException("Failed to find relevent file", e);
} catch (IOException e) {
throw new KingdomSpasException("IO Problem occured while creatin the PDF", e);
}
document.close();
return result;
}
生成的PDF始终已损坏,无法由Adobe Acroread或GS打开。当我在acroread中打开它时,我得到一个错误:
打开此文档时出错。文件已损坏,无法修复
当我尝试使用以下命令在GS中打开它时:
gs \
-o repaired.pdf \
-sDEVICE=pdfwrite \
-dPDFSETTINGS=/prepress \
KingdomSpasAgreement.pdf
我得到以下输出:
****错误:在文件中的任何位置都找不到“startxref”。****警告:读取外部参照表时出错。
****文件已损坏。这可能是由以下原因造成的
****转换或传输文件时出现问题。
****Ghostscript将尝试恢复数据。
****错误:未找到拖车。将不处理任何页面(第一页>最后一页) ****此文件存在已修复或忽略的错误。
****请通知生成此文件的软件的作者
****该文件不符合Adobe发布的PDF格式
****规格 我不明白我可能做错了什么——整个过程似乎相当简单,但总是失败 编辑: 以下是完整性的相关布局:
<TableLayout
android:id="@+id/salesAgreementTableLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/companyLogo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:contentDescription="@string/logo_description"
android:src="@drawable/company_logo" />
<ImageView
android:id="@+id/companyAddress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:contentDescription="@string/address_description"
android:src="@drawable/company_address" />
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<EditText
android:id="@+id/salesExecInitials"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/round"
android:inputType="text"
android:maxLines="1"
android:paddingLeft="130dp"
android:singleLine="true" >
<requestFocus />
</EditText>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:paddingLeft="10dp"
android:text="@string/sales_exec_initials" />
</FrameLayout>
</TableRow>
</TableLayout>
我已经测试了你的代码,它总是创建一个空文档(0个内容字节),而不是一个损坏的文档,这就解释了为什么你不能用
gs
修复它。
关于Android打印框架,我不确定您是否可以不调用PrintManager
类直接打印文档。我读过的所有文档都提到了它,我看到的所有示例代码都使用了它
Android开发者网站上有一个关于自定义文档打印的网站,你可以查看。还提供了完整的示例。
我已经测试了最后一个示例代码,效果很好!唯一的区别是,它在打印前显示一些用于选择选项的UI
希望你能做到这一点 您从未
flush()
或close()
您的流。您还应该在FileOutputStream
上调用getFD()
上的sync()
,以确保所有字节都提交到磁盘(而不是由文件系统进行写缓存)。根据您尝试对文件执行某些操作的时间,这类操作可能会导致输出被截断。您何时检查文件?收到电子邮件后?是的-我以前如何检查?你不是真的问我是不是。你能展示一个示例PDF文件吗?也许这可以提供一个线索,说明它出了什么问题。你能提供一个(链接到一个)样本PDF吗?这将允许分析它的错误,然后详细地告诉您PDF创建代码到底有什么问题。我过去在测试时也会得到一个0字节的文档,因为我是在一个unti测试上下文中运行的。当我在手机或模拟器上运行它时,会得到一个损坏的PDF。我创建这个PDF不是为了打印——至少不是为了mmy应用——而是通过电子邮件发送。事实上,我已经用PDFDocument尝试了所有相同的代码——结果都是一样的。我尝试了这个——我花了一些时间来评论,因为我用新代码修复了一些bug!不幸的是,这对损坏的PDF没有任何影响。我在FileOutputStream上调用了flush()和close(),也在FileDescriptor上调用了sync。很抱歉!我已经在FileOutputStream上尝试了所有这些,正如我所说的,然后我在BufferedOutputStream上尝试了它,它似乎工作了!
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): com.kingdomspas.android.kingdomspasforms.exceptions.KingdomSpasException: Failed to correctly clean up streams
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at com.kingdomspas.android.kingdomspasforms.utils.KingdomSpasFormsPDFGenerator.generate(KingdomSpasFormsPDFGenerator.java:69)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at com.kingdomspas.android.kingdomspasforms.listeners.KingdomSpasSubmitButtonListener.onClick(KingdomSpasSubmitButtonListener.java:25)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at android.view.View.performClick(View.java:4438)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at android.view.View$PerformClick.run(View.java:18439)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at android.os.Handler.handleCallback(Handler.java:733)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at android.os.Handler.dispatchMessage(Handler.java:95)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at android.os.Looper.loop(Looper.java:136)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at android.app.ActivityThread.main(ActivityThread.java:5147)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at java.lang.reflect.Method.invokeNative(Native Method)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at java.lang.reflect.Method.invoke(Method.java:515)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at dalvik.system.NativeStart.main(Native Method)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): Caused by: java.io.IOException: write failed: EBADF (Bad file number)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.IoBridge.write(IoBridge.java:455)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at java.io.FileOutputStream.write(FileOutputStream.java:187)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at java.io.BufferedOutputStream.flushInternal(BufferedOutputStream.java:185)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:85)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at com.kingdomspas.android.kingdomspasforms.utils.KingdomSpasFormsPDFGenerator.generate(KingdomSpasFormsPDFGenerator.java:63)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): ... 12 more
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): Caused by: libcore.io.ErrnoException: write failed: EBADF (Bad file number)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.Posix.writeBytes(Native Method)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.Posix.write(Posix.java:202)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.BlockGuardOs.write(BlockGuardOs.java:197)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.IoBridge.write(IoBridge.java:450)
12-16 16:39:05.675: E/KingdomSpasSubmitButtonListener(17950): ... 16 more
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): Failed to generate the agreement PDF
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): com.kingdomspas.android.kingdomspasforms.exceptions.KingdomSpasException: Failed to correctly clean up streams
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at com.kingdomspas.android.kingdomspasforms.utils.KingdomSpasFormsPDFGenerator.generate(KingdomSpasFormsPDFGenerator.java:69)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at com.kingdomspas.android.kingdomspasforms.listeners.KingdomSpasSubmitButtonListener.onClick(KingdomSpasSubmitButtonListener.java:25)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at android.view.View.performClick(View.java:4438)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at android.view.View$PerformClick.run(View.java:18439)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at android.os.Handler.handleCallback(Handler.java:733)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at android.os.Handler.dispatchMessage(Handler.java:95)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at android.os.Looper.loop(Looper.java:136)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at android.app.ActivityThread.main(ActivityThread.java:5147)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at java.lang.reflect.Method.invokeNative(Native Method)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at java.lang.reflect.Method.invoke(Method.java:515)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at dalvik.system.NativeStart.main(Native Method)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): Caused by: java.io.IOException: write failed: EBADF (Bad file number)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.IoBridge.write(IoBridge.java:455)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at java.io.FileOutputStream.write(FileOutputStream.java:187)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at java.io.BufferedOutputStream.flushInternal(BufferedOutputStream.java:185)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:85)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at com.kingdomspas.android.kingdomspasforms.utils.KingdomSpasFormsPDFGenerator.generate(KingdomSpasFormsPDFGenerator.java:63)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): ... 12 more
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): Caused by: libcore.io.ErrnoException: write failed: EBADF (Bad file number)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.Posix.writeBytes(Native Method)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.Posix.write(Posix.java:202)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.BlockGuardOs.write(BlockGuardOs.java:197)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): at libcore.io.IoBridge.write(IoBridge.java:450)
12-16 16:39:13.845: E/KingdomSpasSubmitButtonListener(17950): ... 16 more