在实施PDF阅读器库EACCES（拒绝）：Android开放失败 [英] Android open failed: EACCES (Permission denied) in implementing PDF Reader library

问题描述

我实现的PDF阅读器这个库。我已经实现了code为链接解释。但是当我运行我得到以下异常。这里的logcat的：

I am implementing this library for PDF reader. I've implemented the code as explained in the link. but when I am running I am getting following exception. here's the logcat:

10:43:56.429 32577-32577/com.example.fahad.testpdfreaderlibrary I/PDFVIEWER: Intent { cmp=com.example.fahad.testpdfreaderlibrary/.TestPDFActivity (has extras) }
11-05 10:43:56.431 32577-32577/com.example.fahad.testpdfreaderlibrary I/PDFVIEWER: ST='file '/storage/emulated/0/pdf.pdf' has 433994 bytes'
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err: java.io.FileNotFoundException: /storage/emulated/0/pdf.pdf: open failed: EACCES (Permission denied)
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at libcore.io.IoBridge.open(IoBridge.java:452)
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at java.io.RandomAccessFile.<init>(RandomAccessFile.java:117)
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at net.sf.andpdf.pdfviewer.PdfViewerActivity.openFile(PdfViewerActivity.java:841)
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at net.sf.andpdf.pdfviewer.PdfViewerActivity.parsePDF(PdfViewerActivity.java:815)
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at net.sf.andpdf.pdfviewer.PdfViewerActivity.setContent(PdfViewerActivity.java:221)
11-05 10:43:56.432 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at net.sf.andpdf.pdfviewer.PdfViewerActivity.onCreate(PdfViewerActivity.java:212)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.Activity.performCreate(Activity.java:6237)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.ActivityThread.-wrap11(ActivityThread.java)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:102)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.os.Looper.loop(Looper.java:148)
11-05 10:43:56.433 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:5417)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err: Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at libcore.io.Posix.open(Native Method)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     at libcore.io.IoBridge.open(IoBridge.java:438)
11-05 10:43:56.434 32577-32577/com.example.fahad.testpdfreaderlibrary W/System.err:     ... 17 more

也是我在AndroidManifest.xml中以下行添加了：

also I've added in my AndroidManifest.xml following lines:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

但仍然得到同样的异常

but still getting the same exception

推荐答案

简单的解决方案：设置你的目标SDK回到22

Simple solution: set your target SDK back to 22

清理解决方案：请求运行时权限

此内容出更多的信息。

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